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