1 /*
2 * Copyright (c) 1994, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package java.lang;
27
28 import java.lang.reflect.AnnotatedElement;
29 import java.lang.reflect.Array;
30 import java.lang.reflect.GenericArrayType;
31 import java.lang.reflect.GenericDeclaration;
32 import java.lang.reflect.Member;
33 import java.lang.reflect.Field;
34 import java.lang.reflect.Executable;
35 import java.lang.reflect.Method;
36 import java.lang.reflect.Constructor;
37 import java.lang.reflect.Modifier;
38 import java.lang.reflect.Type;
39 import java.lang.reflect.TypeVariable;
40 import java.lang.reflect.InvocationTargetException;
41 import java.lang.reflect.AnnotatedType;
42 import java.lang.ref.SoftReference;
43 import java.io.InputStream;
44 import java.io.ObjectStreamField;
45 import java.security.AccessController;
46 import java.security.PrivilegedAction;
47 import java.util.ArrayList;
48 import java.util.Arrays;
49 import java.util.Collection;
50 import java.util.HashSet;
51 import java.util.LinkedHashMap;
52 import java.util.List;
53 import java.util.Set;
54 import java.util.Map;
55 import java.util.HashMap;
56 import java.util.Objects;
57 import sun.misc.Unsafe;
58 import sun.reflect.CallerSensitive;
59 import sun.reflect.ConstantPool;
60 import sun.reflect.Reflection;
61 import sun.reflect.ReflectionFactory;
62 import sun.reflect.generics.factory.CoreReflectionFactory;
63 import sun.reflect.generics.factory.GenericsFactory;
64 import sun.reflect.generics.repository.ClassRepository;
65 import sun.reflect.generics.repository.MethodRepository;
66 import sun.reflect.generics.repository.ConstructorRepository;
67 import sun.reflect.generics.scope.ClassScope;
68 import sun.security.util.SecurityConstants;
69 import java.lang.annotation.Annotation;
70 import java.lang.reflect.Proxy;
71 import sun.reflect.annotation.*;
72 import sun.reflect.misc.ReflectUtil;
73
74 /**
75 * Instances of the class {@code Class} represent classes and
76 * interfaces in a running Java application. An enum is a kind of
77 * class and an annotation is a kind of interface. Every array also
78 * belongs to a class that is reflected as a {@code Class} object
79 * that is shared by all arrays with the same element type and number
80 * of dimensions. The primitive Java types ({@code boolean},
81 * {@code byte}, {@code char}, {@code short},
82 * {@code int}, {@code long}, {@code float}, and
83 * {@code double}), and the keyword {@code void} are also
84 * represented as {@code Class} objects.
85 *
86 * <p> {@code Class} has no public constructor. Instead {@code Class}
87 * objects are constructed automatically by the Java Virtual Machine as classes
88 * are loaded and by calls to the {@code defineClass} method in the class
89 * loader.
90 *
91 * <p> The following example uses a {@code Class} object to print the
92 * class name of an object:
93 *
94 * <p> <blockquote><pre>
95 * void printClassName(Object obj) {
96 * System.out.println("The class of " + obj +
97 * " is " + obj.getClass().getName());
98 * }
99 * </pre></blockquote>
100 *
101 * <p> It is also possible to get the {@code Class} object for a named
102 * type (or for void) using a class literal. See Section 15.8.2 of
103 * <cite>The Java™ Language Specification</cite>.
104 * For example:
105 *
106 * <p> <blockquote>
107 * {@code System.out.println("The name of class Foo is: "+Foo.class.getName());}
108 * </blockquote>
109 *
110 * @param <T> the type of the class modeled by this {@code Class}
111 * object. For example, the type of {@code String.class} is {@code
112 * Class<String>}. Use {@code Class<?>} if the class being modeled is
113 * unknown.
114 *
115 * @author unascribed
116 * @see java.lang.ClassLoader#defineClass(byte[], int, int)
117 * @since JDK1.0
118 */
119 public final class Class<T> implements java.io.Serializable,
120 GenericDeclaration,
121 Type,
122 AnnotatedElement {
123 private static final int ANNOTATION= 0x00002000;
124 private static final int ENUM = 0x00004000;
125 private static final int SYNTHETIC = 0x00001000;
126
127 private static native void registerNatives();
128 static {
129 registerNatives();
130 }
131
132 /*
133 * Constructor. Only the Java Virtual Machine creates Class
134 * objects.
135 */
136 private Class() {}
137
138
139 /**
140 * Converts the object to a string. The string representation is the
141 * string "class" or "interface", followed by a space, and then by the
142 * fully qualified name of the class in the format returned by
143 * {@code getName}. If this {@code Class} object represents a
144 * primitive type, this method returns the name of the primitive type. If
145 * this {@code Class} object represents void this method returns
146 * "void".
147 *
148 * @return a string representation of this class object.
149 */
150 public String toString() {
151 return (isInterface() ? "interface " : (isPrimitive() ? "" : "class "))
152 + getName();
153 }
154
155 /**
156 * Returns a string describing this {@code Class}, including
157 * information about modifiers and type parameters.
158 *
159 * The string is formatted as a list of type modifiers, if any,
160 * followed by the kind of type (empty string for primitive types
161 * and {@code class}, {@code enum}, {@code interface}, or
162 * <code>@</code>{@code interface}, as appropriate), followed
163 * by the type's name, followed by an angle-bracketed
164 * comma-separated list of the type's type parameters, if any.
165 *
166 * A space is used to separate modifiers from one another and to
167 * separate any modifiers from the kind of type. The modifiers
168 * occur in canonical order. If there are no type parameters, the
169 * type parameter list is elided.
170 *
171 * <p>Note that since information about the runtime representation
172 * of a type is being generated, modifiers not present on the
173 * originating source code or illegal on the originating source
174 * code may be present.
175 *
176 * @return a string describing this {@code Class}, including
177 * information about modifiers and type parameters
178 *
179 * @since 1.8
180 */
181 public String toGenericString() {
182 if (isPrimitive()) {
183 return toString();
184 } else {
185 StringBuilder sb = new StringBuilder();
186
187 // Class modifiers are a superset of interface modifiers
188 int modifiers = getModifiers() & Modifier.classModifiers();
189 if (modifiers != 0) {
190 sb.append(Modifier.toString(modifiers));
191 sb.append(' ');
192 }
193
194 if (isAnnotation()) {
195 sb.append('@');
196 }
197 if (isInterface()) { // Note: all annotation types are interfaces
198 sb.append("interface");
199 } else {
200 if (isEnum())
201 sb.append("enum");
202 else
203 sb.append("class");
204 }
205 sb.append(' ');
206 sb.append(getName());
207
208 TypeVariable<?>[] typeparms = getTypeParameters();
209 if (typeparms.length > 0) {
210 boolean first = true;
211 sb.append('<');
212 for(TypeVariable<?> typeparm: typeparms) {
213 if (!first)
214 sb.append(',');
215 sb.append(typeparm.getTypeName());
216 first = false;
217 }
218 sb.append('>');
219 }
220
221 return sb.toString();
222 }
223 }
224
225 /**
226 * Returns the {@code Class} object associated with the class or
227 * interface with the given string name. Invoking this method is
228 * equivalent to:
229 *
230 * <blockquote>
231 * {@code Class.forName(className, true, currentLoader)}
232 * </blockquote>
233 *
234 * where {@code currentLoader} denotes the defining class loader of
235 * the current class.
236 *
237 * <p> For example, the following code fragment returns the
238 * runtime {@code Class} descriptor for the class named
239 * {@code java.lang.Thread}:
240 *
241 * <blockquote>
242 * {@code Class t = Class.forName("java.lang.Thread")}
243 * </blockquote>
244 * <p>
245 * A call to {@code forName("X")} causes the class named
246 * {@code X} to be initialized.
247 *
248 * @param className the fully qualified name of the desired class.
249 * @return the {@code Class} object for the class with the
250 * specified name.
251 * @exception LinkageError if the linkage fails
252 * @exception ExceptionInInitializerError if the initialization provoked
253 * by this method fails
254 * @exception ClassNotFoundException if the class cannot be located
255 */
256 @CallerSensitive
257 public static Class<?> forName(String className)
258 throws ClassNotFoundException {
259 return forName0(className, true,
260 ClassLoader.getClassLoader(Reflection.getCallerClass()));
261 }
262
263
264 /**
265 * Returns the {@code Class} object associated with the class or
266 * interface with the given string name, using the given class loader.
267 * Given the fully qualified name for a class or interface (in the same
268 * format returned by {@code getName}) this method attempts to
269 * locate, load, and link the class or interface. The specified class
270 * loader is used to load the class or interface. If the parameter
271 * {@code loader} is null, the class is loaded through the bootstrap
272 * class loader. The class is initialized only if the
273 * {@code initialize} parameter is {@code true} and if it has
274 * not been initialized earlier.
275 *
276 * <p> If {@code name} denotes a primitive type or void, an attempt
277 * will be made to locate a user-defined class in the unnamed package whose
278 * name is {@code name}. Therefore, this method cannot be used to
279 * obtain any of the {@code Class} objects representing primitive
280 * types or void.
281 *
282 * <p> If {@code name} denotes an array class, the component type of
283 * the array class is loaded but not initialized.
284 *
285 * <p> For example, in an instance method the expression:
286 *
287 * <blockquote>
288 * {@code Class.forName("Foo")}
289 * </blockquote>
290 *
291 * is equivalent to:
292 *
293 * <blockquote>
294 * {@code Class.forName("Foo", true, this.getClass().getClassLoader())}
295 * </blockquote>
296 *
297 * Note that this method throws errors related to loading, linking or
298 * initializing as specified in Sections 12.2, 12.3 and 12.4 of <em>The
299 * Java Language Specification</em>.
300 * Note that this method does not check whether the requested class
301 * is accessible to its caller.
302 *
303 * <p> If the {@code loader} is {@code null}, and a security
304 * manager is present, and the caller's class loader is not null, then this
305 * method calls the security manager's {@code checkPermission} method
306 * with a {@code RuntimePermission("getClassLoader")} permission to
307 * ensure it's ok to access the bootstrap class loader.
308 *
309 * @param name fully qualified name of the desired class
310 * @param initialize if {@code true} the class will be initialized.
311 * See Section 12.4 of <em>The Java Language Specification</em>.
312 * @param loader class loader from which the class must be loaded
313 * @return class object representing the desired class
314 *
315 * @exception LinkageError if the linkage fails
316 * @exception ExceptionInInitializerError if the initialization provoked
317 * by this method fails
318 * @exception ClassNotFoundException if the class cannot be located by
319 * the specified class loader
320 *
321 * @see java.lang.Class#forName(String)
322 * @see java.lang.ClassLoader
323 * @since 1.2
324 */
325 @CallerSensitive
326 public static Class<?> forName(String name, boolean initialize,
327 ClassLoader loader)
328 throws ClassNotFoundException
329 {
330 if (sun.misc.VM.isSystemDomainLoader(loader)) {
331 SecurityManager sm = System.getSecurityManager();
332 if (sm != null) {
333 ClassLoader ccl = ClassLoader.getClassLoader(Reflection.getCallerClass());
334 if (!sun.misc.VM.isSystemDomainLoader(ccl)) {
335 sm.checkPermission(
336 SecurityConstants.GET_CLASSLOADER_PERMISSION);
337 }
338 }
339 }
340 return forName0(name, initialize, loader);
341 }
342
343 /** Called after security checks have been made. */
344 private static native Class<?> forName0(String name, boolean initialize,
345 ClassLoader loader)
346 throws ClassNotFoundException;
347
348 /**
349 * Creates a new instance of the class represented by this {@code Class}
350 * object. The class is instantiated as if by a {@code new}
351 * expression with an empty argument list. The class is initialized if it
352 * has not already been initialized.
353 *
354 * <p>Note that this method propagates any exception thrown by the
355 * nullary constructor, including a checked exception. Use of
356 * this method effectively bypasses the compile-time exception
357 * checking that would otherwise be performed by the compiler.
358 * The {@link
359 * java.lang.reflect.Constructor#newInstance(java.lang.Object...)
360 * Constructor.newInstance} method avoids this problem by wrapping
361 * any exception thrown by the constructor in a (checked) {@link
362 * java.lang.reflect.InvocationTargetException}.
363 *
364 * @return a newly allocated instance of the class represented by this
365 * object.
366 * @throws IllegalAccessException if the class or its nullary
367 * constructor is not accessible.
368 * @throws InstantiationException
369 * if this {@code Class} represents an abstract class,
370 * an interface, an array class, a primitive type, or void;
371 * or if the class has no nullary constructor;
372 * or if the instantiation fails for some other reason.
373 * @throws ExceptionInInitializerError if the initialization
374 * provoked by this method fails.
375 * @throws SecurityException
376 * If a security manager, <i>s</i>, is present and
377 * the caller's class loader is not the same as or an
378 * ancestor of the class loader for the current class and
379 * invocation of {@link SecurityManager#checkPackageAccess
380 * s.checkPackageAccess()} denies access to the package
381 * of this class.
382 */
383 @CallerSensitive
384 public T newInstance()
385 throws InstantiationException, IllegalAccessException
386 {
387 if (System.getSecurityManager() != null) {
388 checkMemberAccess(Member.PUBLIC, Reflection.getCallerClass(), false);
389 }
390
391 // NOTE: the following code may not be strictly correct under
392 // the current Java memory model.
393
394 // Constructor lookup
395 if (cachedConstructor == null) {
396 if (this == Class.class) {
397 throw new IllegalAccessException(
398 "Can not call newInstance() on the Class for java.lang.Class"
399 );
400 }
401 try {
402 Class<?>[] empty = {};
403 final Constructor<T> c = getConstructor0(empty, Member.DECLARED);
404 // Disable accessibility checks on the constructor
405 // since we have to do the security check here anyway
406 // (the stack depth is wrong for the Constructor's
407 // security check to work)
408 java.security.AccessController.doPrivileged(
409 new java.security.PrivilegedAction<Void>() {
410 public Void run() {
411 c.setAccessible(true);
412 return null;
413 }
414 });
415 cachedConstructor = c;
416 } catch (NoSuchMethodException e) {
417 throw (InstantiationException)
418 new InstantiationException(getName()).initCause(e);
419 }
420 }
421 Constructor<T> tmpConstructor = cachedConstructor;
422 // Security check (same as in java.lang.reflect.Constructor)
423 int modifiers = tmpConstructor.getModifiers();
424 if (!Reflection.quickCheckMemberAccess(this, modifiers)) {
425 Class<?> caller = Reflection.getCallerClass();
426 if (newInstanceCallerCache != caller) {
427 Reflection.ensureMemberAccess(caller, this, null, modifiers);
428 newInstanceCallerCache = caller;
429 }
430 }
431 // Run constructor
432 try {
433 return tmpConstructor.newInstance((Object[])null);
434 } catch (InvocationTargetException e) {
435 Unsafe.getUnsafe().throwException(e.getTargetException());
436 // Not reached
437 return null;
438 }
439 }
440 private volatile transient Constructor<T> cachedConstructor;
441 private volatile transient Class<?> newInstanceCallerCache;
442
443
444 /**
445 * Determines if the specified {@code Object} is assignment-compatible
446 * with the object represented by this {@code Class}. This method is
447 * the dynamic equivalent of the Java language {@code instanceof}
448 * operator. The method returns {@code true} if the specified
449 * {@code Object} argument is non-null and can be cast to the
450 * reference type represented by this {@code Class} object without
451 * raising a {@code ClassCastException.} It returns {@code false}
452 * otherwise.
453 *
454 * <p> Specifically, if this {@code Class} object represents a
455 * declared class, this method returns {@code true} if the specified
456 * {@code Object} argument is an instance of the represented class (or
457 * of any of its subclasses); it returns {@code false} otherwise. If
458 * this {@code Class} object represents an array class, this method
459 * returns {@code true} if the specified {@code Object} argument
460 * can be converted to an object of the array class by an identity
461 * conversion or by a widening reference conversion; it returns
462 * {@code false} otherwise. If this {@code Class} object
463 * represents an interface, this method returns {@code true} if the
464 * class or any superclass of the specified {@code Object} argument
465 * implements this interface; it returns {@code false} otherwise. If
466 * this {@code Class} object represents a primitive type, this method
467 * returns {@code false}.
468 *
469 * @param obj the object to check
470 * @return true if {@code obj} is an instance of this class
471 *
472 * @since JDK1.1
473 */
474 public native boolean isInstance(Object obj);
475
476
477 /**
478 * Determines if the class or interface represented by this
479 * {@code Class} object is either the same as, or is a superclass or
480 * superinterface of, the class or interface represented by the specified
481 * {@code Class} parameter. It returns {@code true} if so;
482 * otherwise it returns {@code false}. If this {@code Class}
483 * object represents a primitive type, this method returns
484 * {@code true} if the specified {@code Class} parameter is
485 * exactly this {@code Class} object; otherwise it returns
486 * {@code false}.
487 *
488 * <p> Specifically, this method tests whether the type represented by the
489 * specified {@code Class} parameter can be converted to the type
490 * represented by this {@code Class} object via an identity conversion
491 * or via a widening reference conversion. See <em>The Java Language
492 * Specification</em>, sections 5.1.1 and 5.1.4 , for details.
493 *
494 * @param cls the {@code Class} object to be checked
495 * @return the {@code boolean} value indicating whether objects of the
496 * type {@code cls} can be assigned to objects of this class
497 * @exception NullPointerException if the specified Class parameter is
498 * null.
499 * @since JDK1.1
500 */
501 public native boolean isAssignableFrom(Class<?> cls);
502
503
504 /**
505 * Determines if the specified {@code Class} object represents an
506 * interface type.
507 *
508 * @return {@code true} if this object represents an interface;
509 * {@code false} otherwise.
510 */
511 public native boolean isInterface();
512
513
514 /**
515 * Determines if this {@code Class} object represents an array class.
516 *
517 * @return {@code true} if this object represents an array class;
518 * {@code false} otherwise.
519 * @since JDK1.1
520 */
521 public native boolean isArray();
522
523
524 /**
525 * Determines if the specified {@code Class} object represents a
526 * primitive type.
527 *
528 * <p> There are nine predefined {@code Class} objects to represent
529 * the eight primitive types and void. These are created by the Java
530 * Virtual Machine, and have the same names as the primitive types that
531 * they represent, namely {@code boolean}, {@code byte},
532 * {@code char}, {@code short}, {@code int},
533 * {@code long}, {@code float}, and {@code double}.
534 *
535 * <p> These objects may only be accessed via the following public static
536 * final variables, and are the only {@code Class} objects for which
537 * this method returns {@code true}.
538 *
539 * @return true if and only if this class represents a primitive type
540 *
541 * @see java.lang.Boolean#TYPE
542 * @see java.lang.Character#TYPE
543 * @see java.lang.Byte#TYPE
544 * @see java.lang.Short#TYPE
545 * @see java.lang.Integer#TYPE
546 * @see java.lang.Long#TYPE
547 * @see java.lang.Float#TYPE
548 * @see java.lang.Double#TYPE
549 * @see java.lang.Void#TYPE
550 * @since JDK1.1
551 */
552 public native boolean isPrimitive();
553
554 /**
555 * Returns true if this {@code Class} object represents an annotation
556 * type. Note that if this method returns true, {@link #isInterface()}
557 * would also return true, as all annotation types are also interfaces.
558 *
559 * @return {@code true} if this class object represents an annotation
560 * type; {@code false} otherwise
561 * @since 1.5
562 */
563 public boolean isAnnotation() {
564 return (getModifiers() & ANNOTATION) != 0;
565 }
566
567 /**
568 * Returns {@code true} if this class is a synthetic class;
569 * returns {@code false} otherwise.
570 * @return {@code true} if and only if this class is a synthetic class as
571 * defined by the Java Language Specification.
572 * @jls 13.1 The Form of a Binary
573 * @since 1.5
574 */
575 public boolean isSynthetic() {
576 return (getModifiers() & SYNTHETIC) != 0;
577 }
578
579 /**
580 * Returns the name of the entity (class, interface, array class,
581 * primitive type, or void) represented by this {@code Class} object,
582 * as a {@code String}.
583 *
584 * <p> If this class object represents a reference type that is not an
585 * array type then the binary name of the class is returned, as specified
586 * by
587 * <cite>The Java™ Language Specification</cite>.
588 *
589 * <p> If this class object represents a primitive type or void, then the
590 * name returned is a {@code String} equal to the Java language
591 * keyword corresponding to the primitive type or void.
592 *
593 * <p> If this class object represents a class of arrays, then the internal
594 * form of the name consists of the name of the element type preceded by
595 * one or more '{@code [}' characters representing the depth of the array
596 * nesting. The encoding of element type names is as follows:
597 *
598 * <blockquote><table summary="Element types and encodings">
599 * <tr><th> Element Type <th> <th> Encoding
600 * <tr><td> boolean <td> <td align=center> Z
601 * <tr><td> byte <td> <td align=center> B
602 * <tr><td> char <td> <td align=center> C
603 * <tr><td> class or interface
604 * <td> <td align=center> L<i>classname</i>;
605 * <tr><td> double <td> <td align=center> D
606 * <tr><td> float <td> <td align=center> F
607 * <tr><td> int <td> <td align=center> I
608 * <tr><td> long <td> <td align=center> J
609 * <tr><td> short <td> <td align=center> S
610 * </table></blockquote>
611 *
612 * <p> The class or interface name <i>classname</i> is the binary name of
613 * the class specified above.
614 *
615 * <p> Examples:
616 * <blockquote><pre>
617 * String.class.getName()
618 * returns "java.lang.String"
619 * byte.class.getName()
620 * returns "byte"
621 * (new Object[3]).getClass().getName()
622 * returns "[Ljava.lang.Object;"
623 * (new int[3][4][5][6][7][8][9]).getClass().getName()
624 * returns "[[[[[[[I"
625 * </pre></blockquote>
626 *
627 * @return the name of the class or interface
628 * represented by this object.
629 */
630 public String getName() {
631 String name = this.name;
632 if (name == null)
633 this.name = name = getName0();
634 return name;
635 }
636
637 // cache the name to reduce the number of calls into the VM
638 private transient String name;
639 private native String getName0();
640
641 /**
642 * Returns the class loader for the class. Some implementations may use
643 * null to represent the bootstrap class loader. This method will return
644 * null in such implementations if this class was loaded by the bootstrap
645 * class loader.
646 *
647 * <p> If a security manager is present, and the caller's class loader is
648 * not null and the caller's class loader is not the same as or an ancestor of
649 * the class loader for the class whose class loader is requested, then
650 * this method calls the security manager's {@code checkPermission}
651 * method with a {@code RuntimePermission("getClassLoader")}
652 * permission to ensure it's ok to access the class loader for the class.
653 *
654 * <p>If this object
655 * represents a primitive type or void, null is returned.
656 *
657 * @return the class loader that loaded the class or interface
658 * represented by this object.
659 * @throws SecurityException
660 * if a security manager exists and its
661 * {@code checkPermission} method denies
662 * access to the class loader for the class.
663 * @see java.lang.ClassLoader
664 * @see SecurityManager#checkPermission
665 * @see java.lang.RuntimePermission
666 */
667 @CallerSensitive
668 public ClassLoader getClassLoader() {
669 ClassLoader cl = getClassLoader0();
670 if (cl == null)
671 return null;
672 SecurityManager sm = System.getSecurityManager();
673 if (sm != null) {
674 ClassLoader.checkClassLoaderPermission(cl, Reflection.getCallerClass());
675 }
676 return cl;
677 }
678
679 // Package-private to allow ClassLoader access
680 native ClassLoader getClassLoader0();
681
682
683 /**
684 * Returns an array of {@code TypeVariable} objects that represent the
685 * type variables declared by the generic declaration represented by this
686 * {@code GenericDeclaration} object, in declaration order. Returns an
687 * array of length 0 if the underlying generic declaration declares no type
688 * variables.
689 *
690 * @return an array of {@code TypeVariable} objects that represent
691 * the type variables declared by this generic declaration
692 * @throws java.lang.reflect.GenericSignatureFormatError if the generic
693 * signature of this generic declaration does not conform to
694 * the format specified in
695 * <cite>The Java™ Virtual Machine Specification</cite>
696 * @since 1.5
697 */
698 @SuppressWarnings("unchecked")
699 public TypeVariable<Class<T>>[] getTypeParameters() {
700 ClassRepository info = getGenericInfo();
701 if (info != null)
702 return (TypeVariable<Class<T>>[])info.getTypeParameters();
703 else
704 return (TypeVariable<Class<T>>[])new TypeVariable<?>[0];
705 }
706
707
708 /**
709 * Returns the {@code Class} representing the superclass of the entity
710 * (class, interface, primitive type or void) represented by this
711 * {@code Class}. If this {@code Class} represents either the
712 * {@code Object} class, an interface, a primitive type, or void, then
713 * null is returned. If this object represents an array class then the
714 * {@code Class} object representing the {@code Object} class is
715 * returned.
716 *
717 * @return the superclass of the class represented by this object.
718 */
719 public native Class<? super T> getSuperclass();
720
721
722 /**
723 * Returns the {@code Type} representing the direct superclass of
724 * the entity (class, interface, primitive type or void) represented by
725 * this {@code Class}.
726 *
727 * <p>If the superclass is a parameterized type, the {@code Type}
728 * object returned must accurately reflect the actual type
729 * parameters used in the source code. The parameterized type
730 * representing the superclass is created if it had not been
731 * created before. See the declaration of {@link
732 * java.lang.reflect.ParameterizedType ParameterizedType} for the
733 * semantics of the creation process for parameterized types. If
734 * this {@code Class} represents either the {@code Object}
735 * class, an interface, a primitive type, or void, then null is
736 * returned. If this object represents an array class then the
737 * {@code Class} object representing the {@code Object} class is
738 * returned.
739 *
740 * @throws java.lang.reflect.GenericSignatureFormatError if the generic
741 * class signature does not conform to the format specified in
742 * <cite>The Java™ Virtual Machine Specification</cite>
743 * @throws TypeNotPresentException if the generic superclass
744 * refers to a non-existent type declaration
745 * @throws java.lang.reflect.MalformedParameterizedTypeException if the
746 * generic superclass refers to a parameterized type that cannot be
747 * instantiated for any reason
748 * @return the superclass of the class represented by this object
749 * @since 1.5
750 */
751 public Type getGenericSuperclass() {
752 ClassRepository info = getGenericInfo();
753 if (info == null) {
754 return getSuperclass();
755 }
756
757 // Historical irregularity:
758 // Generic signature marks interfaces with superclass = Object
759 // but this API returns null for interfaces
760 if (isInterface()) {
761 return null;
762 }
763
764 return info.getSuperclass();
765 }
766
767 /**
768 * Gets the package for this class. The class loader of this class is used
769 * to find the package. If the class was loaded by the bootstrap class
770 * loader the set of packages loaded from CLASSPATH is searched to find the
771 * package of the class. Null is returned if no package object was created
772 * by the class loader of this class.
773 *
774 * <p> Packages have attributes for versions and specifications only if the
775 * information was defined in the manifests that accompany the classes, and
776 * if the class loader created the package instance with the attributes
777 * from the manifest.
778 *
779 * @return the package of the class, or null if no package
780 * information is available from the archive or codebase.
781 */
782 public Package getPackage() {
783 return Package.getPackage(this);
784 }
785
786
787 /**
788 * Determines the interfaces implemented by the class or interface
789 * represented by this object.
790 *
791 * <p> If this object represents a class, the return value is an array
792 * containing objects representing all interfaces implemented by the
793 * class. The order of the interface objects in the array corresponds to
794 * the order of the interface names in the {@code implements} clause
795 * of the declaration of the class represented by this object. For
796 * example, given the declaration:
797 * <blockquote>
798 * {@code class Shimmer implements FloorWax, DessertTopping { ... }}
799 * </blockquote>
800 * suppose the value of {@code s} is an instance of
801 * {@code Shimmer}; the value of the expression:
802 * <blockquote>
803 * {@code s.getClass().getInterfaces()[0]}
804 * </blockquote>
805 * is the {@code Class} object that represents interface
806 * {@code FloorWax}; and the value of:
807 * <blockquote>
808 * {@code s.getClass().getInterfaces()[1]}
809 * </blockquote>
810 * is the {@code Class} object that represents interface
811 * {@code DessertTopping}.
812 *
813 * <p> If this object represents an interface, the array contains objects
814 * representing all interfaces extended by the interface. The order of the
815 * interface objects in the array corresponds to the order of the interface
816 * names in the {@code extends} clause of the declaration of the
817 * interface represented by this object.
818 *
819 * <p> If this object represents a class or interface that implements no
820 * interfaces, the method returns an array of length 0.
821 *
822 * <p> If this object represents a primitive type or void, the method
823 * returns an array of length 0.
824 *
825 * @return an array of interfaces implemented by this class.
826 */
827 public Class<?>[] getInterfaces() {
828 ReflectionData<T> rd = reflectionData();
829 if (rd == null) {
830 // no cloning required
831 return getInterfaces0();
832 } else {
833 Class<?>[] interfaces = rd.interfaces;
834 if (interfaces == null) {
835 interfaces = getInterfaces0();
836 rd.interfaces = interfaces;
837 }
838 // defensively copy before handing over to user code
839 return interfaces.clone();
840 }
841 }
842
843 private native Class<?>[] getInterfaces0();
844
845 /**
846 * Returns the {@code Type}s representing the interfaces
847 * directly implemented by the class or interface represented by
848 * this object.
849 *
850 * <p>If a superinterface is a parameterized type, the
851 * {@code Type} object returned for it must accurately reflect
852 * the actual type parameters used in the source code. The
853 * parameterized type representing each superinterface is created
854 * if it had not been created before. See the declaration of
855 * {@link java.lang.reflect.ParameterizedType ParameterizedType}
856 * for the semantics of the creation process for parameterized
857 * types.
858 *
859 * <p> If this object represents a class, the return value is an
860 * array containing objects representing all interfaces
861 * implemented by the class. The order of the interface objects in
862 * the array corresponds to the order of the interface names in
863 * the {@code implements} clause of the declaration of the class
864 * represented by this object. In the case of an array class, the
865 * interfaces {@code Cloneable} and {@code Serializable} are
866 * returned in that order.
867 *
868 * <p>If this object represents an interface, the array contains
869 * objects representing all interfaces directly extended by the
870 * interface. The order of the interface objects in the array
871 * corresponds to the order of the interface names in the
872 * {@code extends} clause of the declaration of the interface
873 * represented by this object.
874 *
875 * <p>If this object represents a class or interface that
876 * implements no interfaces, the method returns an array of length
877 * 0.
878 *
879 * <p>If this object represents a primitive type or void, the
880 * method returns an array of length 0.
881 *
882 * @throws java.lang.reflect.GenericSignatureFormatError
883 * if the generic class signature does not conform to the format
884 * specified in
885 * <cite>The Java™ Virtual Machine Specification</cite>
886 * @throws TypeNotPresentException if any of the generic
887 * superinterfaces refers to a non-existent type declaration
888 * @throws java.lang.reflect.MalformedParameterizedTypeException
889 * if any of the generic superinterfaces refer to a parameterized
890 * type that cannot be instantiated for any reason
891 * @return an array of interfaces implemented by this class
892 * @since 1.5
893 */
894 public Type[] getGenericInterfaces() {
895 ClassRepository info = getGenericInfo();
896 return (info == null) ? getInterfaces() : info.getSuperInterfaces();
897 }
898
899
900 /**
901 * Returns the {@code Class} representing the component type of an
902 * array. If this class does not represent an array class this method
903 * returns null.
904 *
905 * @return the {@code Class} representing the component type of this
906 * class if this class is an array
907 * @see java.lang.reflect.Array
908 * @since JDK1.1
909 */
910 public native Class<?> getComponentType();
911
912
913 /**
914 * Returns the Java language modifiers for this class or interface, encoded
915 * in an integer. The modifiers consist of the Java Virtual Machine's
916 * constants for {@code public}, {@code protected},
917 * {@code private}, {@code final}, {@code static},
918 * {@code abstract} and {@code interface}; they should be decoded
919 * using the methods of class {@code Modifier}.
920 *
921 * <p> If the underlying class is an array class, then its
922 * {@code public}, {@code private} and {@code protected}
923 * modifiers are the same as those of its component type. If this
924 * {@code Class} represents a primitive type or void, its
925 * {@code public} modifier is always {@code true}, and its
926 * {@code protected} and {@code private} modifiers are always
927 * {@code false}. If this object represents an array class, a
928 * primitive type or void, then its {@code final} modifier is always
929 * {@code true} and its interface modifier is always
930 * {@code false}. The values of its other modifiers are not determined
931 * by this specification.
932 *
933 * <p> The modifier encodings are defined in <em>The Java Virtual Machine
934 * Specification</em>, table 4.1.
935 *
936 * @return the {@code int} representing the modifiers for this class
937 * @see java.lang.reflect.Modifier
938 * @since JDK1.1
939 */
940 public native int getModifiers();
941
942
943 /**
944 * Gets the signers of this class.
945 *
946 * @return the signers of this class, or null if there are no signers. In
947 * particular, this method returns null if this object represents
948 * a primitive type or void.
949 * @since JDK1.1
950 */
951 public native Object[] getSigners();
952
953
954 /**
955 * Set the signers of this class.
956 */
957 native void setSigners(Object[] signers);
958
959
960 /**
961 * If this {@code Class} object represents a local or anonymous
962 * class within a method, returns a {@link
963 * java.lang.reflect.Method Method} object representing the
964 * immediately enclosing method of the underlying class. Returns
965 * {@code null} otherwise.
966 *
967 * In particular, this method returns {@code null} if the underlying
968 * class is a local or anonymous class immediately enclosed by a type
969 * declaration, instance initializer or static initializer.
970 *
971 * @return the immediately enclosing method of the underlying class, if
972 * that class is a local or anonymous class; otherwise {@code null}.
973 *
974 * @throws SecurityException
975 * If a security manager, <i>s</i>, is present and any of the
976 * following conditions is met:
977 *
978 * <ul>
979 *
980 * <li> the caller's class loader is not the same as the
981 * class loader of the enclosing class and invocation of
982 * {@link SecurityManager#checkPermission
983 * s.checkPermission} method with
984 * {@code RuntimePermission("accessDeclaredMembers")}
985 * denies access to the methods within the enclosing class
986 *
987 * <li> the caller's class loader is not the same as or an
988 * ancestor of the class loader for the enclosing class and
989 * invocation of {@link SecurityManager#checkPackageAccess
990 * s.checkPackageAccess()} denies access to the package
991 * of the enclosing class
992 *
993 * </ul>
994 * @since 1.5
995 */
996 @CallerSensitive
997 public Method getEnclosingMethod() throws SecurityException {
998 EnclosingMethodInfo enclosingInfo = getEnclosingMethodInfo();
999
1000 if (enclosingInfo == null)
1001 return null;
1002 else {
1003 if (!enclosingInfo.isMethod())
1004 return null;
1005
1006 MethodRepository typeInfo = MethodRepository.make(enclosingInfo.getDescriptor(),
1007 getFactory());
1008 Class<?> returnType = toClass(typeInfo.getReturnType());
1009 Type [] parameterTypes = typeInfo.getParameterTypes();
1010 Class<?>[] parameterClasses = new Class<?>[parameterTypes.length];
1011
1012 // Convert Types to Classes; returned types *should*
1013 // be class objects since the methodDescriptor's used
1014 // don't have generics information
1015 for(int i = 0; i < parameterClasses.length; i++)
1016 parameterClasses[i] = toClass(parameterTypes[i]);
1017
1018 // Perform access check
1019 Class<?> enclosingCandidate = enclosingInfo.getEnclosingClass();
1020 enclosingCandidate.checkMemberAccess(Member.DECLARED,
1021 Reflection.getCallerClass(), true);
1022 /*
1023 * Loop over all declared methods; match method name,
1024 * number of and type of parameters, *and* return
1025 * type. Matching return type is also necessary
1026 * because of covariant returns, etc.
1027 */
1028 for(Method m: enclosingCandidate.getDeclaredMethods()) {
1029 if (m.getName().equals(enclosingInfo.getName()) ) {
1030 Class<?>[] candidateParamClasses = m.getParameterTypes();
1031 if (candidateParamClasses.length == parameterClasses.length) {
1032 boolean matches = true;
1033 for(int i = 0; i < candidateParamClasses.length; i++) {
1034 if (!candidateParamClasses[i].equals(parameterClasses[i])) {
1035 matches = false;
1036 break;
1037 }
1038 }
1039
1040 if (matches) { // finally, check return type
1041 if (m.getReturnType().equals(returnType) )
1042 return m;
1043 }
1044 }
1045 }
1046 }
1047
1048 throw new InternalError("Enclosing method not found");
1049 }
1050 }
1051
1052 private native Object[] getEnclosingMethod0();
1053
1054 private EnclosingMethodInfo getEnclosingMethodInfo() {
1055 Object[] enclosingInfo = getEnclosingMethod0();
1056 if (enclosingInfo == null)
1057 return null;
1058 else {
1059 return new EnclosingMethodInfo(enclosingInfo);
1060 }
1061 }
1062
1063 private final static class EnclosingMethodInfo {
1064 private Class<?> enclosingClass;
1065 private String name;
1066 private String descriptor;
1067
1068 private EnclosingMethodInfo(Object[] enclosingInfo) {
1069 if (enclosingInfo.length != 3)
1070 throw new InternalError("Malformed enclosing method information");
1071 try {
1072 // The array is expected to have three elements:
1073
1074 // the immediately enclosing class
1075 enclosingClass = (Class<?>) enclosingInfo[0];
1076 assert(enclosingClass != null);
1077
1078 // the immediately enclosing method or constructor's
1079 // name (can be null).
1080 name = (String) enclosingInfo[1];
1081
1082 // the immediately enclosing method or constructor's
1083 // descriptor (null iff name is).
1084 descriptor = (String) enclosingInfo[2];
1085 assert((name != null && descriptor != null) || name == descriptor);
1086 } catch (ClassCastException cce) {
1087 throw new InternalError("Invalid type in enclosing method information", cce);
1088 }
1089 }
1090
1091 boolean isPartial() {
1092 return enclosingClass == null || name == null || descriptor == null;
1093 }
1094
1095 boolean isConstructor() { return !isPartial() && "<init>".equals(name); }
1096
1097 boolean isMethod() { return !isPartial() && !isConstructor() && !"<clinit>".equals(name); }
1098
1099 Class<?> getEnclosingClass() { return enclosingClass; }
1100
1101 String getName() { return name; }
1102
1103 String getDescriptor() { return descriptor; }
1104
1105 }
1106
1107 private static Class<?> toClass(Type o) {
1108 if (o instanceof GenericArrayType)
1109 return Array.newInstance(toClass(((GenericArrayType)o).getGenericComponentType()),
1110 0)
1111 .getClass();
1112 return (Class<?>)o;
1113 }
1114
1115 /**
1116 * If this {@code Class} object represents a local or anonymous
1117 * class within a constructor, returns a {@link
1118 * java.lang.reflect.Constructor Constructor} object representing
1119 * the immediately enclosing constructor of the underlying
1120 * class. Returns {@code null} otherwise. In particular, this
1121 * method returns {@code null} if the underlying class is a local
1122 * or anonymous class immediately enclosed by a type declaration,
1123 * instance initializer or static initializer.
1124 *
1125 * @return the immediately enclosing constructor of the underlying class, if
1126 * that class is a local or anonymous class; otherwise {@code null}.
1127 * @throws SecurityException
1128 * If a security manager, <i>s</i>, is present and any of the
1129 * following conditions is met:
1130 *
1131 * <ul>
1132 *
1133 * <li> the caller's class loader is not the same as the
1134 * class loader of the enclosing class and invocation of
1135 * {@link SecurityManager#checkPermission
1136 * s.checkPermission} method with
1137 * {@code RuntimePermission("accessDeclaredMembers")}
1138 * denies access to the constructors within the enclosing class
1139 *
1140 * <li> the caller's class loader is not the same as or an
1141 * ancestor of the class loader for the enclosing class and
1142 * invocation of {@link SecurityManager#checkPackageAccess
1143 * s.checkPackageAccess()} denies access to the package
1144 * of the enclosing class
1145 *
1146 * </ul>
1147 * @since 1.5
1148 */
1149 @CallerSensitive
1150 public Constructor<?> getEnclosingConstructor() throws SecurityException {
1151 EnclosingMethodInfo enclosingInfo = getEnclosingMethodInfo();
1152
1153 if (enclosingInfo == null)
1154 return null;
1155 else {
1156 if (!enclosingInfo.isConstructor())
1157 return null;
1158
1159 ConstructorRepository typeInfo = ConstructorRepository.make(enclosingInfo.getDescriptor(),
1160 getFactory());
1161 Type [] parameterTypes = typeInfo.getParameterTypes();
1162 Class<?>[] parameterClasses = new Class<?>[parameterTypes.length];
1163
1164 // Convert Types to Classes; returned types *should*
1165 // be class objects since the methodDescriptor's used
1166 // don't have generics information
1167 for(int i = 0; i < parameterClasses.length; i++)
1168 parameterClasses[i] = toClass(parameterTypes[i]);
1169
1170 // Perform access check
1171 Class<?> enclosingCandidate = enclosingInfo.getEnclosingClass();
1172 enclosingCandidate.checkMemberAccess(Member.DECLARED,
1173 Reflection.getCallerClass(), true);
1174 /*
1175 * Loop over all declared constructors; match number
1176 * of and type of parameters.
1177 */
1178 for(Constructor<?> c: enclosingCandidate.getDeclaredConstructors()) {
1179 Class<?>[] candidateParamClasses = c.getParameterTypes();
1180 if (candidateParamClasses.length == parameterClasses.length) {
1181 boolean matches = true;
1182 for(int i = 0; i < candidateParamClasses.length; i++) {
1183 if (!candidateParamClasses[i].equals(parameterClasses[i])) {
1184 matches = false;
1185 break;
1186 }
1187 }
1188
1189 if (matches)
1190 return c;
1191 }
1192 }
1193
1194 throw new InternalError("Enclosing constructor not found");
1195 }
1196 }
1197
1198
1199 /**
1200 * If the class or interface represented by this {@code Class} object
1201 * is a member of another class, returns the {@code Class} object
1202 * representing the class in which it was declared. This method returns
1203 * null if this class or interface is not a member of any other class. If
1204 * this {@code Class} object represents an array class, a primitive
1205 * type, or void,then this method returns null.
1206 *
1207 * @return the declaring class for this class
1208 * @since JDK1.1
1209 */
1210 public native Class<?> getDeclaringClass();
1211
1212
1213 /**
1214 * Returns the immediately enclosing class of the underlying
1215 * class. If the underlying class is a top level class this
1216 * method returns {@code null}.
1217 * @return the immediately enclosing class of the underlying class
1218 * @exception SecurityException
1219 * If a security manager, <i>s</i>, is present and the caller's
1220 * class loader is not the same as or an ancestor of the class
1221 * loader for the enclosing class and invocation of {@link
1222 * SecurityManager#checkPackageAccess s.checkPackageAccess()}
1223 * denies access to the package of the enclosing class
1224 * @since 1.5
1225 */
1226 @CallerSensitive
1227 public Class<?> getEnclosingClass() throws SecurityException {
1228 // There are five kinds of classes (or interfaces):
1229 // a) Top level classes
1230 // b) Nested classes (static member classes)
1231 // c) Inner classes (non-static member classes)
1232 // d) Local classes (named classes declared within a method)
1233 // e) Anonymous classes
1234
1235
1236 // JVM Spec 4.8.6: A class must have an EnclosingMethod
1237 // attribute if and only if it is a local class or an
1238 // anonymous class.
1239 EnclosingMethodInfo enclosingInfo = getEnclosingMethodInfo();
1240 Class<?> enclosingCandidate;
1241
1242 if (enclosingInfo == null) {
1243 // This is a top level or a nested class or an inner class (a, b, or c)
1244 enclosingCandidate = getDeclaringClass();
1245 } else {
1246 Class<?> enclosingClass = enclosingInfo.getEnclosingClass();
1247 // This is a local class or an anonymous class (d or e)
1248 if (enclosingClass == this || enclosingClass == null)
1249 throw new InternalError("Malformed enclosing method information");
1250 else
1251 enclosingCandidate = enclosingClass;
1252 }
1253
1254 if (enclosingCandidate != null)
1255 enclosingCandidate.checkPackageAccess(
1256 ClassLoader.getClassLoader(Reflection.getCallerClass()), true);
1257 return enclosingCandidate;
1258 }
1259
1260 /**
1261 * Returns the simple name of the underlying class as given in the
1262 * source code. Returns an empty string if the underlying class is
1263 * anonymous.
1264 *
1265 * <p>The simple name of an array is the simple name of the
1266 * component type with "[]" appended. In particular the simple
1267 * name of an array whose component type is anonymous is "[]".
1268 *
1269 * @return the simple name of the underlying class
1270 * @since 1.5
1271 */
1272 public String getSimpleName() {
1273 if (isArray())
1274 return getComponentType().getSimpleName()+"[]";
1275
1276 String simpleName = getSimpleBinaryName();
1277 if (simpleName == null) { // top level class
1278 simpleName = getName();
1279 return simpleName.substring(simpleName.lastIndexOf(".")+1); // strip the package name
1280 }
1281 // According to JLS3 "Binary Compatibility" (13.1) the binary
1282 // name of non-package classes (not top level) is the binary
1283 // name of the immediately enclosing class followed by a '$' followed by:
1284 // (for nested and inner classes): the simple name.
1285 // (for local classes): 1 or more digits followed by the simple name.
1286 // (for anonymous classes): 1 or more digits.
1287
1288 // Since getSimpleBinaryName() will strip the binary name of
1289 // the immediatly enclosing class, we are now looking at a
1290 // string that matches the regular expression "\$[0-9]*"
1291 // followed by a simple name (considering the simple of an
1292 // anonymous class to be the empty string).
1293
1294 // Remove leading "\$[0-9]*" from the name
1295 int length = simpleName.length();
1296 if (length < 1 || simpleName.charAt(0) != '$')
1297 throw new InternalError("Malformed class name");
1298 int index = 1;
1299 while (index < length && isAsciiDigit(simpleName.charAt(index)))
1300 index++;
1301 // Eventually, this is the empty string iff this is an anonymous class
1302 return simpleName.substring(index);
1303 }
1304
1305 /**
1306 * Return an informative string for the name of this type.
1307 *
1308 * @return an informative string for the name of this type
1309 * @since 1.8
1310 */
1311 public String getTypeName() {
1312 if (isArray()) {
1313 try {
1314 Class<?> cl = this;
1315 int dimensions = 0;
1316 while (cl.isArray()) {
1317 dimensions++;
1318 cl = cl.getComponentType();
1319 }
1320 StringBuilder sb = new StringBuilder();
1321 sb.append(cl.getName());
1322 for (int i = 0; i < dimensions; i++) {
1323 sb.append("[]");
1324 }
1325 return sb.toString();
1326 } catch (Throwable e) { /*FALLTHRU*/ }
1327 }
1328 return getName();
1329 }
1330
1331 /**
1332 * Character.isDigit answers {@code true} to some non-ascii
1333 * digits. This one does not.
1334 */
1335 private static boolean isAsciiDigit(char c) {
1336 return '0' <= c && c <= '9';
1337 }
1338
1339 /**
1340 * Returns the canonical name of the underlying class as
1341 * defined by the Java Language Specification. Returns null if
1342 * the underlying class does not have a canonical name (i.e., if
1343 * it is a local or anonymous class or an array whose component
1344 * type does not have a canonical name).
1345 * @return the canonical name of the underlying class if it exists, and
1346 * {@code null} otherwise.
1347 * @since 1.5
1348 */
1349 public String getCanonicalName() {
1350 if (isArray()) {
1351 String canonicalName = getComponentType().getCanonicalName();
1352 if (canonicalName != null)
1353 return canonicalName + "[]";
1354 else
1355 return null;
1356 }
1357 if (isLocalOrAnonymousClass())
1358 return null;
1359 Class<?> enclosingClass = getEnclosingClass();
1360 if (enclosingClass == null) { // top level class
1361 return getName();
1362 } else {
1363 String enclosingName = enclosingClass.getCanonicalName();
1364 if (enclosingName == null)
1365 return null;
1366 return enclosingName + "." + getSimpleName();
1367 }
1368 }
1369
1370 /**
1371 * Returns {@code true} if and only if the underlying class
1372 * is an anonymous class.
1373 *
1374 * @return {@code true} if and only if this class is an anonymous class.
1375 * @since 1.5
1376 */
1377 public boolean isAnonymousClass() {
1378 return "".equals(getSimpleName());
1379 }
1380
1381 /**
1382 * Returns {@code true} if and only if the underlying class
1383 * is a local class.
1384 *
1385 * @return {@code true} if and only if this class is a local class.
1386 * @since 1.5
1387 */
1388 public boolean isLocalClass() {
1389 return isLocalOrAnonymousClass() && !isAnonymousClass();
1390 }
1391
1392 /**
1393 * Returns {@code true} if and only if the underlying class
1394 * is a member class.
1395 *
1396 * @return {@code true} if and only if this class is a member class.
1397 * @since 1.5
1398 */
1399 public boolean isMemberClass() {
1400 return getSimpleBinaryName() != null && !isLocalOrAnonymousClass();
1401 }
1402
1403 /**
1404 * Returns the "simple binary name" of the underlying class, i.e.,
1405 * the binary name without the leading enclosing class name.
1406 * Returns {@code null} if the underlying class is a top level
1407 * class.
1408 */
1409 private String getSimpleBinaryName() {
1410 Class<?> enclosingClass = getEnclosingClass();
1411 if (enclosingClass == null) // top level class
1412 return null;
1413 // Otherwise, strip the enclosing class' name
1414 try {
1415 return getName().substring(enclosingClass.getName().length());
1416 } catch (IndexOutOfBoundsException ex) {
1417 throw new InternalError("Malformed class name", ex);
1418 }
1419 }
1420
1421 /**
1422 * Returns {@code true} if this is a local class or an anonymous
1423 * class. Returns {@code false} otherwise.
1424 */
1425 private boolean isLocalOrAnonymousClass() {
1426 // JVM Spec 4.8.6: A class must have an EnclosingMethod
1427 // attribute if and only if it is a local class or an
1428 // anonymous class.
1429 return getEnclosingMethodInfo() != null;
1430 }
1431
1432 /**
1433 * Returns an array containing {@code Class} objects representing all
1434 * the public classes and interfaces that are members of the class
1435 * represented by this {@code Class} object. This includes public
1436 * class and interface members inherited from superclasses and public class
1437 * and interface members declared by the class. This method returns an
1438 * array of length 0 if this {@code Class} object has no public member
1439 * classes or interfaces. This method also returns an array of length 0 if
1440 * this {@code Class} object represents a primitive type, an array
1441 * class, or void.
1442 *
1443 * @return the array of {@code Class} objects representing the public
1444 * members of this class
1445 * @throws SecurityException
1446 * If a security manager, <i>s</i>, is present and
1447 * the caller's class loader is not the same as or an
1448 * ancestor of the class loader for the current class and
1449 * invocation of {@link SecurityManager#checkPackageAccess
1450 * s.checkPackageAccess()} denies access to the package
1451 * of this class.
1452 *
1453 * @since JDK1.1
1454 */
1455 @CallerSensitive
1456 public Class<?>[] getClasses() {
1457 checkMemberAccess(Member.PUBLIC, Reflection.getCallerClass(), false);
1458
1459 // Privileged so this implementation can look at DECLARED classes,
1460 // something the caller might not have privilege to do. The code here
1461 // is allowed to look at DECLARED classes because (1) it does not hand
1462 // out anything other than public members and (2) public member access
1463 // has already been ok'd by the SecurityManager.
1464
1465 return java.security.AccessController.doPrivileged(
1466 new java.security.PrivilegedAction<Class<?>[]>() {
1467 public Class<?>[] run() {
1468 List<Class<?>> list = new ArrayList<>();
1469 Class<?> currentClass = Class.this;
1470 while (currentClass != null) {
1471 Class<?>[] members = currentClass.getDeclaredClasses();
1472 for (int i = 0; i < members.length; i++) {
1473 if (Modifier.isPublic(members[i].getModifiers())) {
1474 list.add(members[i]);
1475 }
1476 }
1477 currentClass = currentClass.getSuperclass();
1478 }
1479 return list.toArray(new Class<?>[0]);
1480 }
1481 });
1482 }
1483
1484
1485 /**
1486 * Returns an array containing {@code Field} objects reflecting all
1487 * the accessible public fields of the class or interface represented by
1488 * this {@code Class} object. The elements in the array returned are
1489 * not sorted and are not in any particular order. This method returns an
1490 * array of length 0 if the class or interface has no accessible public
1491 * fields, or if it represents an array class, a primitive type, or void.
1492 *
1493 * <p> Specifically, if this {@code Class} object represents a class,
1494 * this method returns the public fields of this class and of all its
1495 * superclasses. If this {@code Class} object represents an
1496 * interface, this method returns the fields of this interface and of all
1497 * its superinterfaces.
1498 *
1499 * <p> The implicit length field for array class is not reflected by this
1500 * method. User code should use the methods of class {@code Array} to
1501 * manipulate arrays.
1502 *
1503 * <p> See <em>The Java Language Specification</em>, sections 8.2 and 8.3.
1504 *
1505 * @return the array of {@code Field} objects representing the
1506 * public fields
1507 * @throws SecurityException
1508 * If a security manager, <i>s</i>, is present and
1509 * the caller's class loader is not the same as or an
1510 * ancestor of the class loader for the current class and
1511 * invocation of {@link SecurityManager#checkPackageAccess
1512 * s.checkPackageAccess()} denies access to the package
1513 * of this class.
1514 *
1515 * @since JDK1.1
1516 */
1517 @CallerSensitive
1518 public Field[] getFields() throws SecurityException {
1519 checkMemberAccess(Member.PUBLIC, Reflection.getCallerClass(), true);
1520 return copyFields(privateGetPublicFields(null));
1521 }
1522
1523
1524 /**
1525 * Returns an array containing {@code Method} objects reflecting all
1526 * the public <em>member</em> methods of the class or interface represented
1527 * by this {@code Class} object, including those declared by the class
1528 * or interface and those inherited from superclasses and
1529 * superinterfaces. Array classes return all the (public) member methods
1530 * inherited from the {@code Object} class. The elements in the array
1531 * returned are not sorted and are not in any particular order. This
1532 * method returns an array of length 0 if this {@code Class} object
1533 * represents a class or interface that has no public member methods, or if
1534 * this {@code Class} object represents a primitive type or void.
1535 *
1536 * <p> The class initialization method {@code <clinit>} is not
1537 * included in the returned array. If the class declares multiple public
1538 * member methods with the same parameter types, they are all included in
1539 * the returned array.
1540 *
1541 * <p> See <em>The Java Language Specification</em>, sections 8.2 and 8.4.
1542 *
1543 * @return the array of {@code Method} objects representing the
1544 * public methods of this class
1545 * @throws SecurityException
1546 * If a security manager, <i>s</i>, is present and
1547 * the caller's class loader is not the same as or an
1548 * ancestor of the class loader for the current class and
1549 * invocation of {@link SecurityManager#checkPackageAccess
1550 * s.checkPackageAccess()} denies access to the package
1551 * of this class.
1552 *
1553 * @since JDK1.1
1554 */
1555 @CallerSensitive
1556 public Method[] getMethods() throws SecurityException {
1557 checkMemberAccess(Member.PUBLIC, Reflection.getCallerClass(), true);
1558 return copyMethods(privateGetPublicMethods());
1559 }
1560
1561
1562 /**
1563 * Returns an array containing {@code Constructor} objects reflecting
1564 * all the public constructors of the class represented by this
1565 * {@code Class} object. An array of length 0 is returned if the
1566 * class has no public constructors, or if the class is an array class, or
1567 * if the class reflects a primitive type or void.
1568 *
1569 * Note that while this method returns an array of {@code
1570 * Constructor<T>} objects (that is an array of constructors from
1571 * this class), the return type of this method is {@code
1572 * Constructor<?>[]} and <em>not</em> {@code Constructor<T>[]} as
1573 * might be expected. This less informative return type is
1574 * necessary since after being returned from this method, the
1575 * array could be modified to hold {@code Constructor} objects for
1576 * different classes, which would violate the type guarantees of
1577 * {@code Constructor<T>[]}.
1578 *
1579 * @return the array of {@code Constructor} objects representing the
1580 * public constructors of this class
1581 * @throws SecurityException
1582 * If a security manager, <i>s</i>, is present and
1583 * the caller's class loader is not the same as or an
1584 * ancestor of the class loader for the current class and
1585 * invocation of {@link SecurityManager#checkPackageAccess
1586 * s.checkPackageAccess()} denies access to the package
1587 * of this class.
1588 *
1589 * @since JDK1.1
1590 */
1591 @CallerSensitive
1592 public Constructor<?>[] getConstructors() throws SecurityException {
1593 checkMemberAccess(Member.PUBLIC, Reflection.getCallerClass(), true);
1594 return copyConstructors(privateGetDeclaredConstructors(true));
1595 }
1596
1597
1598 /**
1599 * Returns a {@code Field} object that reflects the specified public
1600 * member field of the class or interface represented by this
1601 * {@code Class} object. The {@code name} parameter is a
1602 * {@code String} specifying the simple name of the desired field.
1603 *
1604 * <p> The field to be reflected is determined by the algorithm that
1605 * follows. Let C be the class represented by this object:
1606 * <OL>
1607 * <LI> If C declares a public field with the name specified, that is the
1608 * field to be reflected.</LI>
1609 * <LI> If no field was found in step 1 above, this algorithm is applied
1610 * recursively to each direct superinterface of C. The direct
1611 * superinterfaces are searched in the order they were declared.</LI>
1612 * <LI> If no field was found in steps 1 and 2 above, and C has a
1613 * superclass S, then this algorithm is invoked recursively upon S.
1614 * If C has no superclass, then a {@code NoSuchFieldException}
1615 * is thrown.</LI>
1616 * </OL>
1617 *
1618 * <p> See <em>The Java Language Specification</em>, sections 8.2 and 8.3.
1619 *
1620 * @param name the field name
1621 * @return the {@code Field} object of this class specified by
1622 * {@code name}
1623 * @throws NoSuchFieldException if a field with the specified name is
1624 * not found.
1625 * @throws NullPointerException if {@code name} is {@code null}
1626 * @throws SecurityException
1627 * If a security manager, <i>s</i>, is present and
1628 * the caller's class loader is not the same as or an
1629 * ancestor of the class loader for the current class and
1630 * invocation of {@link SecurityManager#checkPackageAccess
1631 * s.checkPackageAccess()} denies access to the package
1632 * of this class.
1633 *
1634 * @since JDK1.1
1635 */
1636 @CallerSensitive
1637 public Field getField(String name)
1638 throws NoSuchFieldException, SecurityException {
1639 checkMemberAccess(Member.PUBLIC, Reflection.getCallerClass(), true);
1640 Field field = getField0(name);
1641 if (field == null) {
1642 throw new NoSuchFieldException(name);
1643 }
1644 return field;
1645 }
1646
1647
1648 /**
1649 * Returns a {@code Method} object that reflects the specified public
1650 * member method of the class or interface represented by this
1651 * {@code Class} object. The {@code name} parameter is a
1652 * {@code String} specifying the simple name of the desired method. The
1653 * {@code parameterTypes} parameter is an array of {@code Class}
1654 * objects that identify the method's formal parameter types, in declared
1655 * order. If {@code parameterTypes} is {@code null}, it is
1656 * treated as if it were an empty array.
1657 *
1658 * <p> If the {@code name} is "{@code <init>};"or "{@code <clinit>}" a
1659 * {@code NoSuchMethodException} is raised. Otherwise, the method to
1660 * be reflected is determined by the algorithm that follows. Let C be the
1661 * class represented by this object:
1662 * <OL>
1663 * <LI> C is searched for any <I>matching methods</I>. If no matching
1664 * method is found, the algorithm of step 1 is invoked recursively on
1665 * the superclass of C.</LI>
1666 * <LI> If no method was found in step 1 above, the superinterfaces of C
1667 * are searched for a matching method. If any such method is found, it
1668 * is reflected.</LI>
1669 * </OL>
1670 *
1671 * To find a matching method in a class C: If C declares exactly one
1672 * public method with the specified name and exactly the same formal
1673 * parameter types, that is the method reflected. If more than one such
1674 * method is found in C, and one of these methods has a return type that is
1675 * more specific than any of the others, that method is reflected;
1676 * otherwise one of the methods is chosen arbitrarily.
1677 *
1678 * <p>Note that there may be more than one matching method in a
1679 * class because while the Java language forbids a class to
1680 * declare multiple methods with the same signature but different
1681 * return types, the Java virtual machine does not. This
1682 * increased flexibility in the virtual machine can be used to
1683 * implement various language features. For example, covariant
1684 * returns can be implemented with {@linkplain
1685 * java.lang.reflect.Method#isBridge bridge methods}; the bridge
1686 * method and the method being overridden would have the same
1687 * signature but different return types.
1688 *
1689 * <p> See <em>The Java Language Specification</em>, sections 8.2 and 8.4.
1690 *
1691 * @param name the name of the method
1692 * @param parameterTypes the list of parameters
1693 * @return the {@code Method} object that matches the specified
1694 * {@code name} and {@code parameterTypes}
1695 * @throws NoSuchMethodException if a matching method is not found
1696 * or if the name is "<init>"or "<clinit>".
1697 * @throws NullPointerException if {@code name} is {@code null}
1698 * @throws SecurityException
1699 * If a security manager, <i>s</i>, is present and
1700 * the caller's class loader is not the same as or an
1701 * ancestor of the class loader for the current class and
1702 * invocation of {@link SecurityManager#checkPackageAccess
1703 * s.checkPackageAccess()} denies access to the package
1704 * of this class.
1705 *
1706 * @since JDK1.1
1707 */
1708 @CallerSensitive
1709 public Method getMethod(String name, Class<?>... parameterTypes)
1710 throws NoSuchMethodException, SecurityException {
1711 checkMemberAccess(Member.PUBLIC, Reflection.getCallerClass(), true);
1712 Method method = getMethod0(name, parameterTypes);
1713 if (method == null) {
1714 throw new NoSuchMethodException(getName() + "." + name + argumentTypesToString(parameterTypes));
1715 }
1716 return method;
1717 }
1718
1719
1720 /**
1721 * Returns a {@code Constructor} object that reflects the specified
1722 * public constructor of the class represented by this {@code Class}
1723 * object. The {@code parameterTypes} parameter is an array of
1724 * {@code Class} objects that identify the constructor's formal
1725 * parameter types, in declared order.
1726 *
1727 * If this {@code Class} object represents an inner class
1728 * declared in a non-static context, the formal parameter types
1729 * include the explicit enclosing instance as the first parameter.
1730 *
1731 * <p> The constructor to reflect is the public constructor of the class
1732 * represented by this {@code Class} object whose formal parameter
1733 * types match those specified by {@code parameterTypes}.
1734 *
1735 * @param parameterTypes the parameter array
1736 * @return the {@code Constructor} object of the public constructor that
1737 * matches the specified {@code parameterTypes}
1738 * @throws NoSuchMethodException if a matching method is not found.
1739 * @throws SecurityException
1740 * If a security manager, <i>s</i>, is present and
1741 * the caller's class loader is not the same as or an
1742 * ancestor of the class loader for the current class and
1743 * invocation of {@link SecurityManager#checkPackageAccess
1744 * s.checkPackageAccess()} denies access to the package
1745 * of this class.
1746 *
1747 * @since JDK1.1
1748 */
1749 @CallerSensitive
1750 public Constructor<T> getConstructor(Class<?>... parameterTypes)
1751 throws NoSuchMethodException, SecurityException {
1752 checkMemberAccess(Member.PUBLIC, Reflection.getCallerClass(), true);
1753 return getConstructor0(parameterTypes, Member.PUBLIC);
1754 }
1755
1756
1757 /**
1758 * Returns an array of {@code Class} objects reflecting all the
1759 * classes and interfaces declared as members of the class represented by
1760 * this {@code Class} object. This includes public, protected, default
1761 * (package) access, and private classes and interfaces declared by the
1762 * class, but excludes inherited classes and interfaces. This method
1763 * returns an array of length 0 if the class declares no classes or
1764 * interfaces as members, or if this {@code Class} object represents a
1765 * primitive type, an array class, or void.
1766 *
1767 * @return the array of {@code Class} objects representing all the
1768 * declared members of this class
1769 * @throws SecurityException
1770 * If a security manager, <i>s</i>, is present and any of the
1771 * following conditions is met:
1772 *
1773 * <ul>
1774 *
1775 * <li> the caller's class loader is not the same as the
1776 * class loader of this class and invocation of
1777 * {@link SecurityManager#checkPermission
1778 * s.checkPermission} method with
1779 * {@code RuntimePermission("accessDeclaredMembers")}
1780 * denies access to the declared classes within this class
1781 *
1782 * <li> the caller's class loader is not the same as or an
1783 * ancestor of the class loader for the current class and
1784 * invocation of {@link SecurityManager#checkPackageAccess
1785 * s.checkPackageAccess()} denies access to the package
1786 * of this class
1787 *
1788 * </ul>
1789 *
1790 * @since JDK1.1
1791 */
1792 @CallerSensitive
1793 public Class<?>[] getDeclaredClasses() throws SecurityException {
1794 checkMemberAccess(Member.DECLARED, Reflection.getCallerClass(), false);
1795 return getDeclaredClasses0();
1796 }
1797
1798
1799 /**
1800 * Returns an array of {@code Field} objects reflecting all the fields
1801 * declared by the class or interface represented by this
1802 * {@code Class} object. This includes public, protected, default
1803 * (package) access, and private fields, but excludes inherited fields.
1804 * The elements in the array returned are not sorted and are not in any
1805 * particular order. This method returns an array of length 0 if the class
1806 * or interface declares no fields, or if this {@code Class} object
1807 * represents a primitive type, an array class, or void.
1808 *
1809 * <p> See <em>The Java Language Specification</em>, sections 8.2 and 8.3.
1810 *
1811 * @return the array of {@code Field} objects representing all the
1812 * declared fields of this class
1813 * @throws SecurityException
1814 * If a security manager, <i>s</i>, is present and any of the
1815 * following conditions is met:
1816 *
1817 * <ul>
1818 *
1819 * <li> the caller's class loader is not the same as the
1820 * class loader of this class and invocation of
1821 * {@link SecurityManager#checkPermission
1822 * s.checkPermission} method with
1823 * {@code RuntimePermission("accessDeclaredMembers")}
1824 * denies access to the declared fields within this class
1825 *
1826 * <li> the caller's class loader is not the same as or an
1827 * ancestor of the class loader for the current class and
1828 * invocation of {@link SecurityManager#checkPackageAccess
1829 * s.checkPackageAccess()} denies access to the package
1830 * of this class
1831 *
1832 * </ul>
1833 *
1834 * @since JDK1.1
1835 */
1836 @CallerSensitive
1837 public Field[] getDeclaredFields() throws SecurityException {
1838 checkMemberAccess(Member.DECLARED, Reflection.getCallerClass(), true);
1839 return copyFields(privateGetDeclaredFields(false));
1840 }
1841
1842
1843 /**
1844 * Returns an array of {@code Method} objects reflecting all the
1845 * methods declared by the class or interface represented by this
1846 * {@code Class} object. This includes public, protected, default
1847 * (package) access, and private methods, but excludes inherited methods.
1848 * The elements in the array returned are not sorted and are not in any
1849 * particular order. This method returns an array of length 0 if the class
1850 * or interface declares no methods, or if this {@code Class} object
1851 * represents a primitive type, an array class, or void. The class
1852 * initialization method {@code <clinit>} is not included in the
1853 * returned array. If the class declares multiple public member methods
1854 * with the same parameter types, they are all included in the returned
1855 * array.
1856 *
1857 * <p> See <em>The Java Language Specification</em>, section 8.2.
1858 *
1859 * @return the array of {@code Method} objects representing all the
1860 * declared methods of this class
1861 * @throws SecurityException
1862 * If a security manager, <i>s</i>, is present and any of the
1863 * following conditions is met:
1864 *
1865 * <ul>
1866 *
1867 * <li> the caller's class loader is not the same as the
1868 * class loader of this class and invocation of
1869 * {@link SecurityManager#checkPermission
1870 * s.checkPermission} method with
1871 * {@code RuntimePermission("accessDeclaredMembers")}
1872 * denies access to the declared methods within this class
1873 *
1874 * <li> the caller's class loader is not the same as or an
1875 * ancestor of the class loader for the current class and
1876 * invocation of {@link SecurityManager#checkPackageAccess
1877 * s.checkPackageAccess()} denies access to the package
1878 * of this class
1879 *
1880 * </ul>
1881 *
1882 * @since JDK1.1
1883 */
1884 @CallerSensitive
1885 public Method[] getDeclaredMethods() throws SecurityException {
1886 checkMemberAccess(Member.DECLARED, Reflection.getCallerClass(), true);
1887 return copyMethods(privateGetDeclaredMethods(false));
1888 }
1889
1890
1891 /**
1892 * Returns an array of {@code Constructor} objects reflecting all the
1893 * constructors declared by the class represented by this
1894 * {@code Class} object. These are public, protected, default
1895 * (package) access, and private constructors. The elements in the array
1896 * returned are not sorted and are not in any particular order. If the
1897 * class has a default constructor, it is included in the returned array.
1898 * This method returns an array of length 0 if this {@code Class}
1899 * object represents an interface, a primitive type, an array class, or
1900 * void.
1901 *
1902 * <p> See <em>The Java Language Specification</em>, section 8.2.
1903 *
1904 * @return the array of {@code Constructor} objects representing all the
1905 * declared constructors of this class
1906 * @throws SecurityException
1907 * If a security manager, <i>s</i>, is present and any of the
1908 * following conditions is met:
1909 *
1910 * <ul>
1911 *
1912 * <li> the caller's class loader is not the same as the
1913 * class loader of this class and invocation of
1914 * {@link SecurityManager#checkPermission
1915 * s.checkPermission} method with
1916 * {@code RuntimePermission("accessDeclaredMembers")}
1917 * denies access to the declared constructors within this class
1918 *
1919 * <li> the caller's class loader is not the same as or an
1920 * ancestor of the class loader for the current class and
1921 * invocation of {@link SecurityManager#checkPackageAccess
1922 * s.checkPackageAccess()} denies access to the package
1923 * of this class
1924 *
1925 * </ul>
1926 *
1927 * @since JDK1.1
1928 */
1929 @CallerSensitive
1930 public Constructor<?>[] getDeclaredConstructors() throws SecurityException {
1931 checkMemberAccess(Member.DECLARED, Reflection.getCallerClass(), true);
1932 return copyConstructors(privateGetDeclaredConstructors(false));
1933 }
1934
1935
1936 /**
1937 * Returns a {@code Field} object that reflects the specified declared
1938 * field of the class or interface represented by this {@code Class}
1939 * object. The {@code name} parameter is a {@code String} that
1940 * specifies the simple name of the desired field. Note that this method
1941 * will not reflect the {@code length} field of an array class.
1942 *
1943 * @param name the name of the field
1944 * @return the {@code Field} object for the specified field in this
1945 * class
1946 * @throws NoSuchFieldException if a field with the specified name is
1947 * not found.
1948 * @throws NullPointerException if {@code name} is {@code null}
1949 * @throws SecurityException
1950 * If a security manager, <i>s</i>, is present and any of the
1951 * following conditions is met:
1952 *
1953 * <ul>
1954 *
1955 * <li> the caller's class loader is not the same as the
1956 * class loader of this class and invocation of
1957 * {@link SecurityManager#checkPermission
1958 * s.checkPermission} method with
1959 * {@code RuntimePermission("accessDeclaredMembers")}
1960 * denies access to the declared field
1961 *
1962 * <li> the caller's class loader is not the same as or an
1963 * ancestor of the class loader for the current class and
1964 * invocation of {@link SecurityManager#checkPackageAccess
1965 * s.checkPackageAccess()} denies access to the package
1966 * of this class
1967 *
1968 * </ul>
1969 *
1970 * @since JDK1.1
1971 */
1972 @CallerSensitive
1973 public Field getDeclaredField(String name)
1974 throws NoSuchFieldException, SecurityException {
1975 checkMemberAccess(Member.DECLARED, Reflection.getCallerClass(), true);
1976 Field field = searchFields(privateGetDeclaredFields(false), name);
1977 if (field == null) {
1978 throw new NoSuchFieldException(name);
1979 }
1980 return field;
1981 }
1982
1983
1984 /**
1985 * Returns a {@code Method} object that reflects the specified
1986 * declared method of the class or interface represented by this
1987 * {@code Class} object. The {@code name} parameter is a
1988 * {@code String} that specifies the simple name of the desired
1989 * method, and the {@code parameterTypes} parameter is an array of
1990 * {@code Class} objects that identify the method's formal parameter
1991 * types, in declared order. If more than one method with the same
1992 * parameter types is declared in a class, and one of these methods has a
1993 * return type that is more specific than any of the others, that method is
1994 * returned; otherwise one of the methods is chosen arbitrarily. If the
1995 * name is "<init>"or "<clinit>" a {@code NoSuchMethodException}
1996 * is raised.
1997 *
1998 * @param name the name of the method
1999 * @param parameterTypes the parameter array
2000 * @return the {@code Method} object for the method of this class
2001 * matching the specified name and parameters
2002 * @throws NoSuchMethodException if a matching method is not found.
2003 * @throws NullPointerException if {@code name} is {@code null}
2004 * @throws SecurityException
2005 * If a security manager, <i>s</i>, is present and any of the
2006 * following conditions is met:
2007 *
2008 * <ul>
2009 *
2010 * <li> the caller's class loader is not the same as the
2011 * class loader of this class and invocation of
2012 * {@link SecurityManager#checkPermission
2013 * s.checkPermission} method with
2014 * {@code RuntimePermission("accessDeclaredMembers")}
2015 * denies access to the declared method
2016 *
2017 * <li> the caller's class loader is not the same as or an
2018 * ancestor of the class loader for the current class and
2019 * invocation of {@link SecurityManager#checkPackageAccess
2020 * s.checkPackageAccess()} denies access to the package
2021 * of this class
2022 *
2023 * </ul>
2024 *
2025 * @since JDK1.1
2026 */
2027 @CallerSensitive
2028 public Method getDeclaredMethod(String name, Class<?>... parameterTypes)
2029 throws NoSuchMethodException, SecurityException {
2030 checkMemberAccess(Member.DECLARED, Reflection.getCallerClass(), true);
2031 Method method = searchMethods(privateGetDeclaredMethods(false), name, parameterTypes);
2032 if (method == null) {
2033 throw new NoSuchMethodException(getName() + "." + name + argumentTypesToString(parameterTypes));
2034 }
2035 return method;
2036 }
2037
2038
2039 /**
2040 * Returns a {@code Constructor} object that reflects the specified
2041 * constructor of the class or interface represented by this
2042 * {@code Class} object. The {@code parameterTypes} parameter is
2043 * an array of {@code Class} objects that identify the constructor's
2044 * formal parameter types, in declared order.
2045 *
2046 * If this {@code Class} object represents an inner class
2047 * declared in a non-static context, the formal parameter types
2048 * include the explicit enclosing instance as the first parameter.
2049 *
2050 * @param parameterTypes the parameter array
2051 * @return The {@code Constructor} object for the constructor with the
2052 * specified parameter list
2053 * @throws NoSuchMethodException if a matching method is not found.
2054 * @throws SecurityException
2055 * If a security manager, <i>s</i>, is present and any of the
2056 * following conditions is met:
2057 *
2058 * <ul>
2059 *
2060 * <li> the caller's class loader is not the same as the
2061 * class loader of this class and invocation of
2062 * {@link SecurityManager#checkPermission
2063 * s.checkPermission} method with
2064 * {@code RuntimePermission("accessDeclaredMembers")}
2065 * denies access to the declared constructor
2066 *
2067 * <li> the caller's class loader is not the same as or an
2068 * ancestor of the class loader for the current class and
2069 * invocation of {@link SecurityManager#checkPackageAccess
2070 * s.checkPackageAccess()} denies access to the package
2071 * of this class
2072 *
2073 * </ul>
2074 *
2075 * @since JDK1.1
2076 */
2077 @CallerSensitive
2078 public Constructor<T> getDeclaredConstructor(Class<?>... parameterTypes)
2079 throws NoSuchMethodException, SecurityException {
2080 checkMemberAccess(Member.DECLARED, Reflection.getCallerClass(), true);
2081 return getConstructor0(parameterTypes, Member.DECLARED);
2082 }
2083
2084 /**
2085 * Finds a resource with a given name. The rules for searching resources
2086 * associated with a given class are implemented by the defining
2087 * {@linkplain ClassLoader class loader} of the class. This method
2088 * delegates to this object's class loader. If this object was loaded by
2089 * the bootstrap class loader, the method delegates to {@link
2090 * ClassLoader#getSystemResourceAsStream}.
2091 *
2092 * <p> Before delegation, an absolute resource name is constructed from the
2093 * given resource name using this algorithm:
2094 *
2095 * <ul>
2096 *
2097 * <li> If the {@code name} begins with a {@code '/'}
2098 * (<tt>'\u002f'</tt>), then the absolute name of the resource is the
2099 * portion of the {@code name} following the {@code '/'}.
2100 *
2101 * <li> Otherwise, the absolute name is of the following form:
2102 *
2103 * <blockquote>
2104 * {@code modified_package_name/name}
2105 * </blockquote>
2106 *
2107 * <p> Where the {@code modified_package_name} is the package name of this
2108 * object with {@code '/'} substituted for {@code '.'}
2109 * (<tt>'\u002e'</tt>).
2110 *
2111 * </ul>
2112 *
2113 * @param name name of the desired resource
2114 * @return A {@link java.io.InputStream} object or {@code null} if
2115 * no resource with this name is found
2116 * @throws NullPointerException If {@code name} is {@code null}
2117 * @since JDK1.1
2118 */
2119 public InputStream getResourceAsStream(String name) {
2120 name = resolveName(name);
2121 ClassLoader cl = getClassLoader0();
2122 if (cl==null) {
2123 // A system class.
2124 return ClassLoader.getSystemResourceAsStream(name);
2125 }
2126 return cl.getResourceAsStream(name);
2127 }
2128
2129 /**
2130 * Finds a resource with a given name. The rules for searching resources
2131 * associated with a given class are implemented by the defining
2132 * {@linkplain ClassLoader class loader} of the class. This method
2133 * delegates to this object's class loader. If this object was loaded by
2134 * the bootstrap class loader, the method delegates to {@link
2135 * ClassLoader#getSystemResource}.
2136 *
2137 * <p> Before delegation, an absolute resource name is constructed from the
2138 * given resource name using this algorithm:
2139 *
2140 * <ul>
2141 *
2142 * <li> If the {@code name} begins with a {@code '/'}
2143 * (<tt>'\u002f'</tt>), then the absolute name of the resource is the
2144 * portion of the {@code name} following the {@code '/'}.
2145 *
2146 * <li> Otherwise, the absolute name is of the following form:
2147 *
2148 * <blockquote>
2149 * {@code modified_package_name/name}
2150 * </blockquote>
2151 *
2152 * <p> Where the {@code modified_package_name} is the package name of this
2153 * object with {@code '/'} substituted for {@code '.'}
2154 * (<tt>'\u002e'</tt>).
2155 *
2156 * </ul>
2157 *
2158 * @param name name of the desired resource
2159 * @return A {@link java.net.URL} object or {@code null} if no
2160 * resource with this name is found
2161 * @since JDK1.1
2162 */
2163 public java.net.URL getResource(String name) {
2164 name = resolveName(name);
2165 ClassLoader cl = getClassLoader0();
2166 if (cl==null) {
2167 // A system class.
2168 return ClassLoader.getSystemResource(name);
2169 }
2170 return cl.getResource(name);
2171 }
2172
2173
2174
2175 /** protection domain returned when the internal domain is null */
2176 private static java.security.ProtectionDomain allPermDomain;
2177
2178
2179 /**
2180 * Returns the {@code ProtectionDomain} of this class. If there is a
2181 * security manager installed, this method first calls the security
2182 * manager's {@code checkPermission} method with a
2183 * {@code RuntimePermission("getProtectionDomain")} permission to
2184 * ensure it's ok to get the
2185 * {@code ProtectionDomain}.
2186 *
2187 * @return the ProtectionDomain of this class
2188 *
2189 * @throws SecurityException
2190 * if a security manager exists and its
2191 * {@code checkPermission} method doesn't allow
2192 * getting the ProtectionDomain.
2193 *
2194 * @see java.security.ProtectionDomain
2195 * @see SecurityManager#checkPermission
2196 * @see java.lang.RuntimePermission
2197 * @since 1.2
2198 */
2199 public java.security.ProtectionDomain getProtectionDomain() {
2200 SecurityManager sm = System.getSecurityManager();
2201 if (sm != null) {
2202 sm.checkPermission(SecurityConstants.GET_PD_PERMISSION);
2203 }
2204 java.security.ProtectionDomain pd = getProtectionDomain0();
2205 if (pd == null) {
2206 if (allPermDomain == null) {
2207 java.security.Permissions perms =
2208 new java.security.Permissions();
2209 perms.add(SecurityConstants.ALL_PERMISSION);
2210 allPermDomain =
2211 new java.security.ProtectionDomain(null, perms);
2212 }
2213 pd = allPermDomain;
2214 }
2215 return pd;
2216 }
2217
2218
2219 /**
2220 * Returns the ProtectionDomain of this class.
2221 */
2222 private native java.security.ProtectionDomain getProtectionDomain0();
2223
2224 /*
2225 * Return the Virtual Machine's Class object for the named
2226 * primitive type.
2227 */
2228 static native Class<?> getPrimitiveClass(String name);
2229
2230 /*
2231 * Check if client is allowed to access members. If access is denied,
2232 * throw a SecurityException.
2233 *
2234 * This method also enforces package access.
2235 *
2236 * <p> Default policy: allow all clients access with normal Java access
2237 * control.
2238 */
2239 private void checkMemberAccess(int which, Class<?> caller, boolean checkProxyInterfaces) {
2240 final SecurityManager s = System.getSecurityManager();
2241 if (s != null) {
2242 /* Default policy allows access to all {@link Member#PUBLIC} members,
2243 * as well as access to classes that have the same class loader as the caller.
2244 * In all other cases, it requires RuntimePermission("accessDeclaredMembers")
2245 * permission.
2246 */
2247 final ClassLoader ccl = ClassLoader.getClassLoader(caller);
2248 final ClassLoader cl = getClassLoader0();
2249 if (which != Member.PUBLIC) {
2250 if (ccl != cl) {
2251 s.checkPermission(SecurityConstants.CHECK_MEMBER_ACCESS_PERMISSION);
2252 }
2253 }
2254 this.checkPackageAccess(ccl, checkProxyInterfaces);
2255 }
2256 }
2257
2258 /*
2259 * Checks if a client loaded in ClassLoader ccl is allowed to access this
2260 * class under the current package access policy. If access is denied,
2261 * throw a SecurityException.
2262 */
2263 private void checkPackageAccess(final ClassLoader ccl, boolean checkProxyInterfaces) {
2264 final SecurityManager s = System.getSecurityManager();
2265 if (s != null) {
2266 final ClassLoader cl = getClassLoader0();
2267
2268 if (ReflectUtil.needsPackageAccessCheck(ccl, cl)) {
2269 String name = this.getName();
2270 int i = name.lastIndexOf('.');
2271 if (i != -1) {
2272 // skip the package access check on a proxy class in default proxy package
2273 String pkg = name.substring(0, i);
2274 if (!Proxy.isProxyClass(this) || ReflectUtil.isNonPublicProxyClass(this)) {
2275 s.checkPackageAccess(pkg);
2276 }
2277 }
2278 }
2279 // check package access on the proxy interfaces
2280 if (checkProxyInterfaces && Proxy.isProxyClass(this)) {
2281 ReflectUtil.checkProxyPackageAccess(ccl, this.getInterfaces());
2282 }
2283 }
2284 }
2285
2286 /**
2287 * Add a package name prefix if the name is not absolute Remove leading "/"
2288 * if name is absolute
2289 */
2290 private String resolveName(String name) {
2291 if (name == null) {
2292 return name;
2293 }
2294 if (!name.startsWith("/")) {
2295 Class<?> c = this;
2296 while (c.isArray()) {
2297 c = c.getComponentType();
2298 }
2299 String baseName = c.getName();
2300 int index = baseName.lastIndexOf('.');
2301 if (index != -1) {
2302 name = baseName.substring(0, index).replace('.', '/')
2303 +"/"+name;
2304 }
2305 } else {
2306 name = name.substring(1);
2307 }
2308 return name;
2309 }
2310
2311 /**
2312 * Atomic operations support.
2313 */
2314 private static class Atomic {
2315 // initialize Unsafe machinery here, since we need to call Class.class instance method
2316 // and have to avoid calling it in the static initializer of the Class class...
2317 private static final Unsafe unsafe = Unsafe.getUnsafe();
2318 // offset of Class.reflectionData instance field
2319 private static final long reflectionDataOffset;
2320 // offset of Class.annotationType instance field
2321 private static final long annotationTypeOffset;
2322 // offset of Class.annotationData instance field
2323 private static final long annotationDataOffset;
2324
2325 static {
2326 Field[] fields = Class.class.getDeclaredFields0(false); // bypass caches
2327 reflectionDataOffset = objectFieldOffset(fields, "reflectionData");
2328 annotationTypeOffset = objectFieldOffset(fields, "annotationType");
2329 annotationDataOffset = objectFieldOffset(fields, "annotationData");
2330 }
2331
2332 private static long objectFieldOffset(Field[] fields, String fieldName) {
2333 Field field = searchFields(fields, fieldName);
2334 if (field == null) {
2335 throw new Error("No " + fieldName + " field found in java.lang.Class");
2336 }
2337 return unsafe.objectFieldOffset(field);
2338 }
2339
2340 static <T> boolean casReflectionData(Class<?> clazz,
2341 SoftReference<ReflectionData<T>> oldData,
2342 SoftReference<ReflectionData<T>> newData) {
2343 return unsafe.compareAndSwapObject(clazz, reflectionDataOffset, oldData, newData);
2344 }
2345
2346 static <T> boolean casAnnotationType(Class<?> clazz,
2347 AnnotationType oldType,
2348 AnnotationType newType) {
2349 return unsafe.compareAndSwapObject(clazz, annotationTypeOffset, oldType, newType);
2350 }
2351
2352 static <T> boolean casAnnotationData(Class<?> clazz,
2353 AnnotationData oldData,
2354 AnnotationData newData) {
2355 return unsafe.compareAndSwapObject(clazz, annotationDataOffset, oldData, newData);
2356 }
2357 }
2358
2359 /**
2360 * Reflection support.
2361 */
2362
2363 // Caches for certain reflective results
2364 private static boolean useCaches = true;
2365
2366 // reflection data that might get invalidated when JVM TI RedefineClasses() is called
2367 private static class ReflectionData<T> {
2368 volatile Field[] declaredFields;
2369 volatile Field[] publicFields;
2370 volatile Method[] declaredMethods;
2371 volatile Method[] publicMethods;
2372 volatile Constructor<T>[] declaredConstructors;
2373 volatile Constructor<T>[] publicConstructors;
2374 // Intermediate results for getFields and getMethods
2375 volatile Field[] declaredPublicFields;
2376 volatile Method[] declaredPublicMethods;
2377 volatile Class<?>[] interfaces;
2378
2379 // Value of classRedefinedCount when we created this ReflectionData instance
2380 final int redefinedCount;
2381
2382 ReflectionData(int redefinedCount) {
2383 this.redefinedCount = redefinedCount;
2384 }
2385 }
2386
2387 private volatile transient SoftReference<ReflectionData<T>> reflectionData;
2388
2389 // Incremented by the VM on each call to JVM TI RedefineClasses()
2390 // that redefines this class or a superclass.
2391 private volatile transient int classRedefinedCount = 0;
2392
2393 // Lazily create and cache ReflectionData
2394 private ReflectionData<T> reflectionData() {
2395 SoftReference<ReflectionData<T>> reflectionData = this.reflectionData;
2396 int classRedefinedCount = this.classRedefinedCount;
2397 ReflectionData<T> rd;
2398 if (useCaches &&
2399 reflectionData != null &&
2400 (rd = reflectionData.get()) != null &&
2401 rd.redefinedCount == classRedefinedCount) {
2402 return rd;
2403 }
2404 // else no SoftReference or cleared SoftReference or stale ReflectionData
2405 // -> create and replace new instance
2406 return newReflectionData(reflectionData, classRedefinedCount);
2407 }
2408
2409 private ReflectionData<T> newReflectionData(SoftReference<ReflectionData<T>> oldReflectionData,
2410 int classRedefinedCount) {
2411 if (!useCaches) return null;
2412
2413 while (true) {
2414 ReflectionData<T> rd = new ReflectionData<>(classRedefinedCount);
2415 // try to CAS it...
2416 if (Atomic.casReflectionData(this, oldReflectionData, new SoftReference<>(rd))) {
2417 return rd;
2418 }
2419 // else retry
2420 oldReflectionData = this.reflectionData;
2421 classRedefinedCount = this.classRedefinedCount;
2422 if (oldReflectionData != null &&
2423 (rd = oldReflectionData.get()) != null &&
2424 rd.redefinedCount == classRedefinedCount) {
2425 return rd;
2426 }
2427 }
2428 }
2429
2430 // Generic signature handling
2431 private native String getGenericSignature0();
2432
2433 // Generic info repository; lazily initialized
2434 private volatile transient ClassRepository genericInfo;
2435
2436 // accessor for factory
2437 private GenericsFactory getFactory() {
2438 // create scope and factory
2439 return CoreReflectionFactory.make(this, ClassScope.make(this));
2440 }
2441
2442 // accessor for generic info repository;
2443 // generic info is lazily initialized
2444 private ClassRepository getGenericInfo() {
2445 ClassRepository genericInfo = this.genericInfo;
2446 if (genericInfo == null) {
2447 String signature = getGenericSignature0();
2448 if (signature == null) {
2449 genericInfo = ClassRepository.NONE;
2450 } else {
2451 genericInfo = ClassRepository.make(signature, getFactory());
2452 }
2453 this.genericInfo = genericInfo;
2454 }
2455 return (genericInfo != ClassRepository.NONE) ? genericInfo : null;
2456 }
2457
2458 // Annotations handling
2459 native byte[] getRawAnnotations();
2460 // Since 1.8
2461 native byte[] getRawTypeAnnotations();
2462 static byte[] getExecutableTypeAnnotationBytes(Executable ex) {
2463 return getReflectionFactory().getExecutableTypeAnnotationBytes(ex);
2464 }
2465
2466 native ConstantPool getConstantPool();
2467
2468 //
2469 //
2470 // java.lang.reflect.Field handling
2471 //
2472 //
2473
2474 // Returns an array of "root" fields. These Field objects must NOT
2475 // be propagated to the outside world, but must instead be copied
2476 // via ReflectionFactory.copyField.
2477 private Field[] privateGetDeclaredFields(boolean publicOnly) {
2478 checkInitted();
2479 Field[] res;
2480 ReflectionData<T> rd = reflectionData();
2481 if (rd != null) {
2482 res = publicOnly ? rd.declaredPublicFields : rd.declaredFields;
2483 if (res != null) return res;
2484 }
2485 // No cached value available; request value from VM
2486 res = Reflection.filterFields(this, getDeclaredFields0(publicOnly));
2487 if (rd != null) {
2488 if (publicOnly) {
2489 rd.declaredPublicFields = res;
2490 } else {
2491 rd.declaredFields = res;
2492 }
2493 }
2494 return res;
2495 }
2496
2497 // Returns an array of "root" fields. These Field objects must NOT
2498 // be propagated to the outside world, but must instead be copied
2499 // via ReflectionFactory.copyField.
2500 private Field[] privateGetPublicFields(Set<Class<?>> traversedInterfaces) {
2501 checkInitted();
2502 Field[] res;
2503 ReflectionData<T> rd = reflectionData();
2504 if (rd != null) {
2505 res = rd.publicFields;
2506 if (res != null) return res;
2507 }
2508
2509 // No cached value available; compute value recursively.
2510 // Traverse in correct order for getField().
2511 List<Field> fields = new ArrayList<>();
2512 if (traversedInterfaces == null) {
2513 traversedInterfaces = new HashSet<>();
2514 }
2515
2516 // Local fields
2517 Field[] tmp = privateGetDeclaredFields(true);
2518 addAll(fields, tmp);
2519
2520 // Direct superinterfaces, recursively
2521 for (Class<?> c : getInterfaces()) {
2522 if (!traversedInterfaces.contains(c)) {
2523 traversedInterfaces.add(c);
2524 addAll(fields, c.privateGetPublicFields(traversedInterfaces));
2525 }
2526 }
2527
2528 // Direct superclass, recursively
2529 if (!isInterface()) {
2530 Class<?> c = getSuperclass();
2531 if (c != null) {
2532 addAll(fields, c.privateGetPublicFields(traversedInterfaces));
2533 }
2534 }
2535
2536 res = new Field[fields.size()];
2537 fields.toArray(res);
2538 if (rd != null) {
2539 rd.publicFields = res;
2540 }
2541 return res;
2542 }
2543
2544 private static void addAll(Collection<Field> c, Field[] o) {
2545 for (int i = 0; i < o.length; i++) {
2546 c.add(o[i]);
2547 }
2548 }
2549
2550
2551 //
2552 //
2553 // java.lang.reflect.Constructor handling
2554 //
2555 //
2556
2557 // Returns an array of "root" constructors. These Constructor
2558 // objects must NOT be propagated to the outside world, but must
2559 // instead be copied via ReflectionFactory.copyConstructor.
2560 private Constructor<T>[] privateGetDeclaredConstructors(boolean publicOnly) {
2561 checkInitted();
2562 Constructor<T>[] res;
2563 ReflectionData<T> rd = reflectionData();
2564 if (rd != null) {
2565 res = publicOnly ? rd.publicConstructors : rd.declaredConstructors;
2566 if (res != null) return res;
2567 }
2568 // No cached value available; request value from VM
2569 if (isInterface()) {
2570 @SuppressWarnings("unchecked")
2571 Constructor<T>[] temporaryRes = (Constructor<T>[]) new Constructor<?>[0];
2572 res = temporaryRes;
2573 } else {
2574 res = getDeclaredConstructors0(publicOnly);
2575 }
2576 if (rd != null) {
2577 if (publicOnly) {
2578 rd.publicConstructors = res;
2579 } else {
2580 rd.declaredConstructors = res;
2581 }
2582 }
2583 return res;
2584 }
2585
2586 //
2587 //
2588 // java.lang.reflect.Method handling
2589 //
2590 //
2591
2592 // Returns an array of "root" methods. These Method objects must NOT
2593 // be propagated to the outside world, but must instead be copied
2594 // via ReflectionFactory.copyMethod.
2595 private Method[] privateGetDeclaredMethods(boolean publicOnly) {
2596 checkInitted();
2597 Method[] res;
2598 ReflectionData<T> rd = reflectionData();
2599 if (rd != null) {
2600 res = publicOnly ? rd.declaredPublicMethods : rd.declaredMethods;
2601 if (res != null) return res;
2602 }
2603 // No cached value available; request value from VM
2604 res = Reflection.filterMethods(this, getDeclaredMethods0(publicOnly));
2605 if (rd != null) {
2606 if (publicOnly) {
2607 rd.declaredPublicMethods = res;
2608 } else {
2609 rd.declaredMethods = res;
2610 }
2611 }
2612 return res;
2613 }
2614
2615 static class MethodArray {
2616 private Method[] methods;
2617 private int length;
2618
2619 MethodArray() {
2620 methods = new Method[20];
2621 length = 0;
2622 }
2623
2624 void add(Method m) {
2625 if (length == methods.length) {
2626 methods = Arrays.copyOf(methods, 2 * methods.length);
2627 }
2628 methods[length++] = m;
2629 }
2630
2631 void addAll(Method[] ma) {
2632 for (int i = 0; i < ma.length; i++) {
2633 add(ma[i]);
2634 }
2635 }
2636
2637 void addAll(MethodArray ma) {
2638 for (int i = 0; i < ma.length(); i++) {
2639 add(ma.get(i));
2640 }
2641 }
2642
2643 void addIfNotPresent(Method newMethod) {
2644 for (int i = 0; i < length; i++) {
2645 Method m = methods[i];
2646 if (m == newMethod || (m != null && m.equals(newMethod))) {
2647 return;
2648 }
2649 }
2650 add(newMethod);
2651 }
2652
2653 void addAllIfNotPresent(MethodArray newMethods) {
2654 for (int i = 0; i < newMethods.length(); i++) {
2655 Method m = newMethods.get(i);
2656 if (m != null) {
2657 addIfNotPresent(m);
2658 }
2659 }
2660 }
2661
2662 int length() {
2663 return length;
2664 }
2665
2666 Method get(int i) {
2667 return methods[i];
2668 }
2669
2670 void removeByNameAndSignature(Method toRemove) {
2671 for (int i = 0; i < length; i++) {
2672 Method m = methods[i];
2673 if (m != null &&
2674 m.getReturnType() == toRemove.getReturnType() &&
2675 m.getName() == toRemove.getName() &&
2676 arrayContentsEq(m.getParameterTypes(),
2677 toRemove.getParameterTypes())) {
2678 methods[i] = null;
2679 }
2680 }
2681 }
2682
2683 void compactAndTrim() {
2684 int newPos = 0;
2685 // Get rid of null slots
2686 for (int pos = 0; pos < length; pos++) {
2687 Method m = methods[pos];
2688 if (m != null) {
2689 if (pos != newPos) {
2690 methods[newPos] = m;
2691 }
2692 newPos++;
2693 }
2694 }
2695 if (newPos != methods.length) {
2696 methods = Arrays.copyOf(methods, newPos);
2697 }
2698 }
2699
2700 Method[] getArray() {
2701 return methods;
2702 }
2703 }
2704
2705
2706 // Returns an array of "root" methods. These Method objects must NOT
2707 // be propagated to the outside world, but must instead be copied
2708 // via ReflectionFactory.copyMethod.
2709 private Method[] privateGetPublicMethods() {
2710 checkInitted();
2711 Method[] res;
2712 ReflectionData<T> rd = reflectionData();
2713 if (rd != null) {
2714 res = rd.publicMethods;
2715 if (res != null) return res;
2716 }
2717
2718 // No cached value available; compute value recursively.
2719 // Start by fetching public declared methods
2720 MethodArray methods = new MethodArray();
2721 {
2722 Method[] tmp = privateGetDeclaredMethods(true);
2723 methods.addAll(tmp);
2724 }
2725 // Now recur over superclass and direct superinterfaces.
2726 // Go over superinterfaces first so we can more easily filter
2727 // out concrete implementations inherited from superclasses at
2728 // the end.
2729 MethodArray inheritedMethods = new MethodArray();
2730 Class<?>[] interfaces = getInterfaces();
2731 for (int i = 0; i < interfaces.length; i++) {
2732 inheritedMethods.addAll(interfaces[i].privateGetPublicMethods());
2733 }
2734 if (!isInterface()) {
2735 Class<?> c = getSuperclass();
2736 if (c != null) {
2737 MethodArray supers = new MethodArray();
2738 supers.addAll(c.privateGetPublicMethods());
2739 // Filter out concrete implementations of any
2740 // interface methods
2741 for (int i = 0; i < supers.length(); i++) {
2742 Method m = supers.get(i);
2743 if (m != null && !Modifier.isAbstract(m.getModifiers())) {
2744 inheritedMethods.removeByNameAndSignature(m);
2745 }
2746 }
2747 // Insert superclass's inherited methods before
2748 // superinterfaces' to satisfy getMethod's search
2749 // order
2750 supers.addAll(inheritedMethods);
2751 inheritedMethods = supers;
2752 }
2753 }
2754 // Filter out all local methods from inherited ones
2755 for (int i = 0; i < methods.length(); i++) {
2756 Method m = methods.get(i);
2757 inheritedMethods.removeByNameAndSignature(m);
2758 }
2759 methods.addAllIfNotPresent(inheritedMethods);
2760 methods.compactAndTrim();
2761 res = methods.getArray();
2762 if (rd != null) {
2763 rd.publicMethods = res;
2764 }
2765 return res;
2766 }
2767
2768
2769 //
2770 // Helpers for fetchers of one field, method, or constructor
2771 //
2772
2773 private static Field searchFields(Field[] fields, String name) {
2774 String internedName = name.intern();
2775 for (int i = 0; i < fields.length; i++) {
2776 if (fields[i].getName() == internedName) {
2777 return getReflectionFactory().copyField(fields[i]);
2778 }
2779 }
2780 return null;
2781 }
2782
2783 private Field getField0(String name) throws NoSuchFieldException {
2784 // Note: the intent is that the search algorithm this routine
2785 // uses be equivalent to the ordering imposed by
2786 // privateGetPublicFields(). It fetches only the declared
2787 // public fields for each class, however, to reduce the number
2788 // of Field objects which have to be created for the common
2789 // case where the field being requested is declared in the
2790 // class which is being queried.
2791 Field res;
2792 // Search declared public fields
2793 if ((res = searchFields(privateGetDeclaredFields(true), name)) != null) {
2794 return res;
2795 }
2796 // Direct superinterfaces, recursively
2797 Class<?>[] interfaces = getInterfaces();
2798 for (int i = 0; i < interfaces.length; i++) {
2799 Class<?> c = interfaces[i];
2800 if ((res = c.getField0(name)) != null) {
2801 return res;
2802 }
2803 }
2804 // Direct superclass, recursively
2805 if (!isInterface()) {
2806 Class<?> c = getSuperclass();
2807 if (c != null) {
2808 if ((res = c.getField0(name)) != null) {
2809 return res;
2810 }
2811 }
2812 }
2813 return null;
2814 }
2815
2816 private static Method searchMethods(Method[] methods,
2817 String name,
2818 Class<?>[] parameterTypes)
2819 {
2820 Method res = null;
2821 String internedName = name.intern();
2822 for (int i = 0; i < methods.length; i++) {
2823 Method m = methods[i];
2824 if (m.getName() == internedName
2825 && arrayContentsEq(parameterTypes, m.getParameterTypes())
2826 && (res == null
2827 || res.getReturnType().isAssignableFrom(m.getReturnType())))
2828 res = m;
2829 }
2830
2831 return (res == null ? res : getReflectionFactory().copyMethod(res));
2832 }
2833
2834
2835 private Method getMethod0(String name, Class<?>[] parameterTypes) {
2836 // Note: the intent is that the search algorithm this routine
2837 // uses be equivalent to the ordering imposed by
2838 // privateGetPublicMethods(). It fetches only the declared
2839 // public methods for each class, however, to reduce the
2840 // number of Method objects which have to be created for the
2841 // common case where the method being requested is declared in
2842 // the class which is being queried.
2843 Method res;
2844 // Search declared public methods
2845 if ((res = searchMethods(privateGetDeclaredMethods(true),
2846 name,
2847 parameterTypes)) != null) {
2848 return res;
2849 }
2850 // Search superclass's methods
2851 if (!isInterface()) {
2852 Class<? super T> c = getSuperclass();
2853 if (c != null) {
2854 if ((res = c.getMethod0(name, parameterTypes)) != null) {
2855 return res;
2856 }
2857 }
2858 }
2859 // Search superinterfaces' methods
2860 Class<?>[] interfaces = getInterfaces();
2861 for (int i = 0; i < interfaces.length; i++) {
2862 Class<?> c = interfaces[i];
2863 if ((res = c.getMethod0(name, parameterTypes)) != null) {
2864 return res;
2865 }
2866 }
2867 // Not found
2868 return null;
2869 }
2870
2871 private Constructor<T> getConstructor0(Class<?>[] parameterTypes,
2872 int which) throws NoSuchMethodException
2873 {
2874 Constructor<T>[] constructors = privateGetDeclaredConstructors((which == Member.PUBLIC));
2875 for (Constructor<T> constructor : constructors) {
2876 if (arrayContentsEq(parameterTypes,
2877 constructor.getParameterTypes())) {
2878 return getReflectionFactory().copyConstructor(constructor);
2879 }
2880 }
2881 throw new NoSuchMethodException(getName() + ".<init>" + argumentTypesToString(parameterTypes));
2882 }
2883
2884 //
2885 // Other helpers and base implementation
2886 //
2887
2888 private static boolean arrayContentsEq(Object[] a1, Object[] a2) {
2889 if (a1 == null) {
2890 return a2 == null || a2.length == 0;
2891 }
2892
2893 if (a2 == null) {
2894 return a1.length == 0;
2895 }
2896
2897 if (a1.length != a2.length) {
2898 return false;
2899 }
2900
2901 for (int i = 0; i < a1.length; i++) {
2902 if (a1[i] != a2[i]) {
2903 return false;
2904 }
2905 }
2906
2907 return true;
2908 }
2909
2910 private static Field[] copyFields(Field[] arg) {
2911 Field[] out = new Field[arg.length];
2912 ReflectionFactory fact = getReflectionFactory();
2913 for (int i = 0; i < arg.length; i++) {
2914 out[i] = fact.copyField(arg[i]);
2915 }
2916 return out;
2917 }
2918
2919 private static Method[] copyMethods(Method[] arg) {
2920 Method[] out = new Method[arg.length];
2921 ReflectionFactory fact = getReflectionFactory();
2922 for (int i = 0; i < arg.length; i++) {
2923 out[i] = fact.copyMethod(arg[i]);
2924 }
2925 return out;
2926 }
2927
2928 private static <U> Constructor<U>[] copyConstructors(Constructor<U>[] arg) {
2929 Constructor<U>[] out = arg.clone();
2930 ReflectionFactory fact = getReflectionFactory();
2931 for (int i = 0; i < out.length; i++) {
2932 out[i] = fact.copyConstructor(out[i]);
2933 }
2934 return out;
2935 }
2936
2937 private native Field[] getDeclaredFields0(boolean publicOnly);
2938 private native Method[] getDeclaredMethods0(boolean publicOnly);
2939 private native Constructor<T>[] getDeclaredConstructors0(boolean publicOnly);
2940 private native Class<?>[] getDeclaredClasses0();
2941
2942 private static String argumentTypesToString(Class<?>[] argTypes) {
2943 StringBuilder buf = new StringBuilder();
2944 buf.append("(");
2945 if (argTypes != null) {
2946 for (int i = 0; i < argTypes.length; i++) {
2947 if (i > 0) {
2948 buf.append(", ");
2949 }
2950 Class<?> c = argTypes[i];
2951 buf.append((c == null) ? "null" : c.getName());
2952 }
2953 }
2954 buf.append(")");
2955 return buf.toString();
2956 }
2957
2958 /** use serialVersionUID from JDK 1.1 for interoperability */
2959 private static final long serialVersionUID = 3206093459760846163L;
2960
2961
2962 /**
2963 * Class Class is special cased within the Serialization Stream Protocol.
2964 *
2965 * A Class instance is written initially into an ObjectOutputStream in the
2966 * following format:
2967 * <pre>
2968 * {@code TC_CLASS} ClassDescriptor
2969 * A ClassDescriptor is a special cased serialization of
2970 * a {@code java.io.ObjectStreamClass} instance.
2971 * </pre>
2972 * A new handle is generated for the initial time the class descriptor
2973 * is written into the stream. Future references to the class descriptor
2974 * are written as references to the initial class descriptor instance.
2975 *
2976 * @see java.io.ObjectStreamClass
2977 */
2978 private static final ObjectStreamField[] serialPersistentFields =
2979 new ObjectStreamField[0];
2980
2981
2982 /**
2983 * Returns the assertion status that would be assigned to this
2984 * class if it were to be initialized at the time this method is invoked.
2985 * If this class has had its assertion status set, the most recent
2986 * setting will be returned; otherwise, if any package default assertion
2987 * status pertains to this class, the most recent setting for the most
2988 * specific pertinent package default assertion status is returned;
2989 * otherwise, if this class is not a system class (i.e., it has a
2990 * class loader) its class loader's default assertion status is returned;
2991 * otherwise, the system class default assertion status is returned.
2992 * <p>
2993 * Few programmers will have any need for this method; it is provided
2994 * for the benefit of the JRE itself. (It allows a class to determine at
2995 * the time that it is initialized whether assertions should be enabled.)
2996 * Note that this method is not guaranteed to return the actual
2997 * assertion status that was (or will be) associated with the specified
2998 * class when it was (or will be) initialized.
2999 *
3000 * @return the desired assertion status of the specified class.
3001 * @see java.lang.ClassLoader#setClassAssertionStatus
3002 * @see java.lang.ClassLoader#setPackageAssertionStatus
3003 * @see java.lang.ClassLoader#setDefaultAssertionStatus
3004 * @since 1.4
3005 */
3006 public boolean desiredAssertionStatus() {
3007 ClassLoader loader = getClassLoader();
3008 // If the loader is null this is a system class, so ask the VM
3009 if (loader == null)
3010 return desiredAssertionStatus0(this);
3011
3012 // If the classloader has been initialized with the assertion
3013 // directives, ask it. Otherwise, ask the VM.
3014 synchronized(loader.assertionLock) {
3015 if (loader.classAssertionStatus != null) {
3016 return loader.desiredAssertionStatus(getName());
3017 }
3018 }
3019 return desiredAssertionStatus0(this);
3020 }
3021
3022 // Retrieves the desired assertion status of this class from the VM
3023 private static native boolean desiredAssertionStatus0(Class<?> clazz);
3024
3025 /**
3026 * Returns true if and only if this class was declared as an enum in the
3027 * source code.
3028 *
3029 * @return true if and only if this class was declared as an enum in the
3030 * source code
3031 * @since 1.5
3032 */
3033 public boolean isEnum() {
3034 // An enum must both directly extend java.lang.Enum and have
3035 // the ENUM bit set; classes for specialized enum constants
3036 // don't do the former.
3037 return (this.getModifiers() & ENUM) != 0 &&
3038 this.getSuperclass() == java.lang.Enum.class;
3039 }
3040
3041 // Fetches the factory for reflective objects
3042 private static ReflectionFactory getReflectionFactory() {
3043 if (reflectionFactory == null) {
3044 reflectionFactory =
3045 java.security.AccessController.doPrivileged
3046 (new sun.reflect.ReflectionFactory.GetReflectionFactoryAction());
3047 }
3048 return reflectionFactory;
3049 }
3050 private static ReflectionFactory reflectionFactory;
3051
3052 // To be able to query system properties as soon as they're available
3053 private static boolean initted = false;
3054 private static void checkInitted() {
3055 if (initted) return;
3056 AccessController.doPrivileged(new PrivilegedAction<Void>() {
3057 public Void run() {
3058 // Tests to ensure the system properties table is fully
3059 // initialized. This is needed because reflection code is
3060 // called very early in the initialization process (before
3061 // command-line arguments have been parsed and therefore
3062 // these user-settable properties installed.) We assume that
3063 // if System.out is non-null then the System class has been
3064 // fully initialized and that the bulk of the startup code
3065 // has been run.
3066
3067 if (System.out == null) {
3068 // java.lang.System not yet fully initialized
3069 return null;
3070 }
3071
3072 // Doesn't use Boolean.getBoolean to avoid class init.
3073 String val =
3074 System.getProperty("sun.reflect.noCaches");
3075 if (val != null && val.equals("true")) {
3076 useCaches = false;
3077 }
3078
3079 initted = true;
3080 return null;
3081 }
3082 });
3083 }
3084
3085 /**
3086 * Returns the elements of this enum class or null if this
3087 * Class object does not represent an enum type.
3088 *
3089 * @return an array containing the values comprising the enum class
3090 * represented by this Class object in the order they're
3091 * declared, or null if this Class object does not
3092 * represent an enum type
3093 * @since 1.5
3094 */
3095 public T[] getEnumConstants() {
3096 T[] values = getEnumConstantsShared();
3097 return (values != null) ? values.clone() : null;
3098 }
3099
3100 /**
3101 * Returns the elements of this enum class or null if this
3102 * Class object does not represent an enum type;
3103 * identical to getEnumConstants except that the result is
3104 * uncloned, cached, and shared by all callers.
3105 */
3106 T[] getEnumConstantsShared() {
3107 if (enumConstants == null) {
3108 if (!isEnum()) return null;
3109 try {
3110 final Method values = getMethod("values");
3111 java.security.AccessController.doPrivileged(
3112 new java.security.PrivilegedAction<Void>() {
3113 public Void run() {
3114 values.setAccessible(true);
3115 return null;
3116 }
3117 });
3118 @SuppressWarnings("unchecked")
3119 T[] temporaryConstants = (T[])values.invoke(null);
3120 enumConstants = temporaryConstants;
3121 }
3122 // These can happen when users concoct enum-like classes
3123 // that don't comply with the enum spec.
3124 catch (InvocationTargetException | NoSuchMethodException |
3125 IllegalAccessException ex) { return null; }
3126 }
3127 return enumConstants;
3128 }
3129 private volatile transient T[] enumConstants = null;
3130
3131 /**
3132 * Returns a map from simple name to enum constant. This package-private
3133 * method is used internally by Enum to implement
3134 * {@code public static <T extends Enum<T>> T valueOf(Class<T>, String)}
3135 * efficiently. Note that the map is returned by this method is
3136 * created lazily on first use. Typically it won't ever get created.
3137 */
3138 Map<String, T> enumConstantDirectory() {
3139 if (enumConstantDirectory == null) {
3140 T[] universe = getEnumConstantsShared();
3141 if (universe == null)
3142 throw new IllegalArgumentException(
3143 getName() + " is not an enum type");
3144 Map<String, T> m = new HashMap<>(2 * universe.length);
3145 for (T constant : universe)
3146 m.put(((Enum<?>)constant).name(), constant);
3147 enumConstantDirectory = m;
3148 }
3149 return enumConstantDirectory;
3150 }
3151 private volatile transient Map<String, T> enumConstantDirectory = null;
3152
3153 /**
3154 * Casts an object to the class or interface represented
3155 * by this {@code Class} object.
3156 *
3157 * @param obj the object to be cast
3158 * @return the object after casting, or null if obj is null
3159 *
3160 * @throws ClassCastException if the object is not
3161 * null and is not assignable to the type T.
3162 *
3163 * @since 1.5
3164 */
3165 @SuppressWarnings("unchecked")
3166 public T cast(Object obj) {
3167 if (obj != null && !isInstance(obj))
3168 throw new ClassCastException(cannotCastMsg(obj));
3169 return (T) obj;
3170 }
3171
3172 private String cannotCastMsg(Object obj) {
3173 return "Cannot cast " + obj.getClass().getName() + " to " + getName();
3174 }
3175
3176 /**
3177 * Casts this {@code Class} object to represent a subclass of the class
3178 * represented by the specified class object. Checks that the cast
3179 * is valid, and throws a {@code ClassCastException} if it is not. If
3180 * this method succeeds, it always returns a reference to this class object.
3181 *
3182 * <p>This method is useful when a client needs to "narrow" the type of
3183 * a {@code Class} object to pass it to an API that restricts the
3184 * {@code Class} objects that it is willing to accept. A cast would
3185 * generate a compile-time warning, as the correctness of the cast
3186 * could not be checked at runtime (because generic types are implemented
3187 * by erasure).
3188 *
3189 * @param <U> the type to cast this class object to
3190 * @param clazz the class of the type to cast this class object to
3191 * @return this {@code Class} object, cast to represent a subclass of
3192 * the specified class object.
3193 * @throws ClassCastException if this {@code Class} object does not
3194 * represent a subclass of the specified class (here "subclass" includes
3195 * the class itself).
3196 * @since 1.5
3197 */
3198 @SuppressWarnings("unchecked")
3199 public <U> Class<? extends U> asSubclass(Class<U> clazz) {
3200 if (clazz.isAssignableFrom(this))
3201 return (Class<? extends U>) this;
3202 else
3203 throw new ClassCastException(this.toString());
3204 }
3205
3206 /**
3207 * @throws NullPointerException {@inheritDoc}
3208 * @since 1.5
3209 */
3210 @SuppressWarnings("unchecked")
3211 public <A extends Annotation> A getAnnotation(Class<A> annotationClass) {
3212 Objects.requireNonNull(annotationClass);
3213
3214 return (A) annotationData().annotations.get(annotationClass);
3215 }
3216
3217 /**
3218 * {@inheritDoc}
3219 * @throws NullPointerException {@inheritDoc}
3220 * @since 1.5
3221 */
3222 @Override
3223 public boolean isAnnotationPresent(Class<? extends Annotation> annotationClass) {
3224 return GenericDeclaration.super.isAnnotationPresent(annotationClass);
3225 }
3226
3227 /**
3228 * @throws NullPointerException {@inheritDoc}
3229 * @since 1.8
3230 */
3231 @Override
3232 public <A extends Annotation> A[] getAnnotationsByType(Class<A> annotationClass) {
3233 Objects.requireNonNull(annotationClass);
3234
3235 return AnnotationSupport.getMultipleAnnotations(annotationData().annotations, annotationClass);
3236 }
3237
3238 /**
3239 * @since 1.5
3240 */
3241 public Annotation[] getAnnotations() {
3242 return AnnotationParser.toArray(annotationData().annotations);
3243 }
3244
3245 /**
3246 * @throws NullPointerException {@inheritDoc}
3247 * @since 1.8
3248 */
3249 @Override
3250 @SuppressWarnings("unchecked")
3251 public <A extends Annotation> A getDeclaredAnnotation(Class<A> annotationClass) {
3252 Objects.requireNonNull(annotationClass);
3253
3254 return (A) annotationData().declaredAnnotations.get(annotationClass);
3255 }
3256
3257 /**
3258 * @throws NullPointerException {@inheritDoc}
3259 * @since 1.8
3260 */
3261 @Override
3262 public <A extends Annotation> A[] getDeclaredAnnotationsByType(Class<A> annotationClass) {
3263 Objects.requireNonNull(annotationClass);
3264
3265 return AnnotationSupport.getMultipleAnnotations(annotationData().declaredAnnotations, annotationClass);
3266 }
3267
3268 /**
3269 * @since 1.5
3270 */
3271 public Annotation[] getDeclaredAnnotations() {
3272 return AnnotationParser.toArray(annotationData().declaredAnnotations);
3273 }
3274
3275 // annotation data that might get invalidated when JVM TI RedefineClasses() is called
3276 private static class AnnotationData {
3277 final Map<Class<? extends Annotation>, Annotation> annotations;
3278 final Map<Class<? extends Annotation>, Annotation> declaredAnnotations;
3279
3280 // Value of classRedefinedCount when we created this AnnotationData instance
3281 final int redefinedCount;
3282
3283 AnnotationData(Map<Class<? extends Annotation>, Annotation> annotations,
3284 Map<Class<? extends Annotation>, Annotation> declaredAnnotations,
3285 int redefinedCount) {
3286 this.annotations = annotations;
3287 this.declaredAnnotations = declaredAnnotations;
3288 this.redefinedCount = redefinedCount;
3289 }
3290 }
3291
3292 // Annotations cache
3293 @SuppressWarnings("UnusedDeclaration")
3294 private volatile transient AnnotationData annotationData;
3295
3296 private AnnotationData annotationData() {
3297 while (true) { // retry loop
3298 AnnotationData annotationData = this.annotationData;
3299 int classRedefinedCount = this.classRedefinedCount;
3300 if (annotationData != null &&
3301 annotationData.redefinedCount == classRedefinedCount) {
3302 return annotationData;
3303 }
3304 // null or stale annotationData -> optimistically create new instance
3305 AnnotationData newAnnotationData = createAnnotationData(classRedefinedCount);
3306 // try to install it
3307 if (Atomic.casAnnotationData(this, annotationData, newAnnotationData)) {
3308 // successfully installed new AnnotationData
3309 return newAnnotationData;
3310 }
3311 }
3312 }
3313
3314 private AnnotationData createAnnotationData(int classRedefinedCount) {
3315 Map<Class<? extends Annotation>, Annotation> declaredAnnotations =
3316 AnnotationParser.parseAnnotations(getRawAnnotations(), getConstantPool(), this);
3317 Class<?> superClass = getSuperclass();
3318 Map<Class<? extends Annotation>, Annotation> annotations = null;
3319 if (superClass != null) {
3320 Map<Class<? extends Annotation>, Annotation> superAnnotations =
3321 superClass.annotationData().annotations;
3322 for (Map.Entry<Class<? extends Annotation>, Annotation> e : superAnnotations.entrySet()) {
3323 Class<? extends Annotation> annotationClass = e.getKey();
3324 if (AnnotationType.getInstance(annotationClass).isInherited()) {
3325 if (annotations == null) { // lazy construction
3326 annotations = new LinkedHashMap<>((Math.max(
3327 declaredAnnotations.size(),
3328 Math.min(12, declaredAnnotations.size() + superAnnotations.size())
3329 ) * 4 + 2) / 3
3330 );
3331 }
3332 annotations.put(annotationClass, e.getValue());
3333 }
3334 }
3335 }
3336 if (annotations == null) {
3337 // no inherited annotations -> share the Map with declaredAnnotations
3338 annotations = declaredAnnotations;
3339 } else {
3340 // at least one inherited annotation -> declared may override inherited
3341 annotations.putAll(declaredAnnotations);
3342 }
3343 return new AnnotationData(annotations, declaredAnnotations, classRedefinedCount);
3344 }
3345
3346 // Annotation types cache their internal (AnnotationType) form
3347
3348 @SuppressWarnings("UnusedDeclaration")
3349 private volatile transient AnnotationType annotationType;
3350
3351 boolean casAnnotationType(AnnotationType oldType, AnnotationType newType) {
3352 return Atomic.casAnnotationType(this, oldType, newType);
3353 }
3354
3355 AnnotationType getAnnotationType() {
3356 return annotationType;
3357 }
3358
3359 /* Backing store of user-defined values pertaining to this class.
3360 * Maintained by the ClassValue class.
3361 */
3362 transient ClassValue.ClassValueMap classValueMap;
3363
3364 /**
3365 * Returns an AnnotatedType object that represents the use of a type to specify
3366 * the superclass of the entity represented by this Class. (The <em>use</em> of type
3367 * Foo to specify the superclass in '... extends Foo' is distinct from the
3368 * <em>declaration</em> of type Foo.)
3369 *
3370 * If this Class represents a class type whose declaration does not explicitly
3371 * indicate an annotated superclass, the return value is null.
3372 *
3373 * If this Class represents either the Object class, an interface type, an
3374 * array type, a primitive type, or void, the return value is null.
3375 *
3376 * @return an object representing the superclass
3377 * @since 1.8
3378 */
3379 public AnnotatedType getAnnotatedSuperclass() {
3380 if (this == Object.class ||
3381 isInterface() ||
3382 isArray() ||
3383 isPrimitive() ||
3384 this == Void.TYPE) {
3385 return null;
3386 }
3387
3388 return TypeAnnotationParser.buildAnnotatedSuperclass(getRawTypeAnnotations(), getConstantPool(), this);
3389 }
3390
3391 /**
3392 * Returns an array of AnnotatedType objects that represent the use of types to
3393 * specify superinterfaces of the entity represented by this Class. (The <em>use</em>
3394 * of type Foo to specify a superinterface in '... implements Foo' is
3395 * distinct from the <em>declaration</em> of type Foo.)
3396 *
3397 * If this Class represents a class, the return value is an array
3398 * containing objects representing the uses of interface types to specify
3399 * interfaces implemented by the class. The order of the objects in the
3400 * array corresponds to the order of the interface types used in the
3401 * 'implements' clause of the declaration of this Class.
3402 *
3403 * If this Class represents an interface, the return value is an array
3404 * containing objects representing the uses of interface types to specify
3405 * interfaces directly extended by the interface. The order of the objects in
3406 * the array corresponds to the order of the interface types used in the
3407 * 'extends' clause of the declaration of this Class.
3408 *
3409 * If this Class represents a class or interface whose declaration does not
3410 * explicitly indicate any annotated superinterfaces, the return value is an
3411 * array of length 0.
3412 *
3413 * If this Class represents either the Object class, an array type, a
3414 * primitive type, or void, the return value is an array of length 0.
3415 *
3416 * @return an array representing the superinterfaces
3417 * @since 1.8
3418 */
3419 public AnnotatedType[] getAnnotatedInterfaces() {
3420 return TypeAnnotationParser.buildAnnotatedInterfaces(getRawTypeAnnotations(), getConstantPool(), this);
3421 }
3422 }