1 /*
2 * Copyright (c) 2008, 2014, 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.invoke;
27
28 import sun.invoke.util.BytecodeDescriptor;
29 import sun.invoke.util.VerifyAccess;
30
31 import java.lang.reflect.Constructor;
32 import java.lang.reflect.Field;
33 import java.lang.reflect.Method;
34 import java.lang.reflect.Member;
35 import java.lang.reflect.Modifier;
36 import java.util.ArrayList;
37 import java.util.Arrays;
38 import java.util.Collections;
39 import java.util.Iterator;
40 import java.util.List;
41 import java.util.Objects;
42 import sun.misc.JavaLangAccess;
43 import sun.misc.SharedSecrets;
44
45 import static java.lang.invoke.MethodHandleNatives.Constants.*;
46 import static java.lang.invoke.MethodHandleStatics.*;
47
48
49 /**
50 * A {@code MemberName} is a compact symbolic datum which fully characterizes
51 * a method or field reference.
52 * A member name refers to a field, method, constructor, or member type.
53 * Every member name has a simple name (a string) and a type (either a Class or MethodType).
54 * A member name may also have a non-null declaring class, or it may be simply
55 * a naked name/type pair.
56 * A member name may also have non-zero modifier flags.
57 * Finally, a member name may be either resolved or unresolved.
58 * <p>
59 * Whether resolved or not, a member name provides no access rights or
60 * invocation capability to its possessor. It is merely a compact
61 * representation of all symbolic information necessary to link to
62 * and properly use the named member.
63 * <p>
64 * When resolved, a member name's internal implementation may include references to JVM metadata.
65 * This representation is stateless and only descriptive.
66 * It provides no private information and no capability to use the member.
67 * Resolved MemberNames are always interned (except for Class MemberNames)
68 * which allows updating when classes are redefined.
69 * <p>
70 * By contrast, a {@linkplain java.lang.reflect.Method} contains fuller information
71 * about the internals of a method (except its bytecodes) and also
72 * allows invocation. A MemberName is much lighter than a Method,
73 * since it contains about 7 fields to the 16 of Method (plus its sub-arrays),
74 * and those seven fields omit much of the information in Method.
75 * @author jrose
76 */
77 @SuppressWarnings("rawtypes") //Comparable in next line
78 /*non-public*/ final class MemberName implements Member, Comparable, Cloneable {
79 private Class<?> clazz; // class in which the method is defined
80 private String name; // may be null if not yet materialized
81 private Object type; // may be null if not yet materialized
82 private int flags; // modifier bits; see reflect.Modifier
83 //@Injected JVM_Method* vmtarget;
84 //@Injected int vmindex;
85 private Object resolution; // if null, this guy is resolved
86
87 private static final JavaLangAccess jla = SharedSecrets.getJavaLangAccess();
88
89 // bare-bones constructor; the JVM will fill it in
90 MemberName() { }
91
92 /** Create a name for the given class. The resulting name will be in a resolved state. */
93 public MemberName(Class<?> type) {
94 init(type.getDeclaringClass(), type.getSimpleName(), type,
95 flagsMods(IS_TYPE, type.getModifiers(), REF_NONE));
96 initResolved(true);
97 }
98
99 // Construction from symbolic parts, for queries:
100 /** Create a field or type name from the given components:
101 * Declaring class, name, type, reference kind.
102 * The declaring class may be supplied as null if this is to be a bare name and type.
103 * The resulting name will in an unresolved state.
104 */
105 public MemberName(Class<?> defClass, String name, Class<?> type, byte refKind) {
106 init(defClass, name, type, flagsMods(IS_FIELD, 0, refKind));
107 initResolved(false);
108 }
109
110 /** Create a field or type name from the given components: Declaring class, name, type.
111 * The declaring class may be supplied as null if this is to be a bare name and type.
112 * The modifier flags default to zero.
113 * The resulting name will in an unresolved state.
114 */
115 public MemberName(Class<?> defClass, String name, Class<?> type, Void unused) {
116 this(defClass, name, type, REF_NONE);
117 initResolved(false);
118 }
119
120 /** Create a method or constructor name from the given components: Declaring class, name, type, modifiers.
121 * It will be a constructor if and only if the name is {@code "<init>"}.
122 * The declaring class may be supplied as null if this is to be a bare name and type.
123 * The last argument is optional, a boolean which requests REF_invokeSpecial.
124 * The resulting name will in an unresolved state.
125 */
126 public MemberName(Class<?> defClass, String name, MethodType type, byte refKind) {
127 int initFlags = (name != null && name.equals(CONSTRUCTOR_NAME) ? IS_CONSTRUCTOR : IS_METHOD);
128 init(defClass, name, type, flagsMods(initFlags, 0, refKind));
129 initResolved(false);
130 }
131
132 /** Create a method, constructor, or field name from the given components:
133 * Reference kind, declaring class, name, type.
134 */
135 public MemberName(byte refKind, Class<?> defClass, String name, Object type) {
136 int kindFlags;
137 if (MethodHandleNatives.refKindIsField(refKind)) {
138 kindFlags = IS_FIELD;
139 if (!(type instanceof Class))
140 throw newIllegalArgumentException("not a field type");
141 } else if (MethodHandleNatives.refKindIsMethod(refKind)) {
142 kindFlags = IS_METHOD;
143 if (!(type instanceof MethodType))
144 throw newIllegalArgumentException("not a method type");
145 } else if (refKind == REF_newInvokeSpecial) {
146 kindFlags = IS_CONSTRUCTOR;
147 if (!(type instanceof MethodType) ||
148 !CONSTRUCTOR_NAME.equals(name))
149 throw newIllegalArgumentException("not a constructor type or name");
150 } else {
151 throw newIllegalArgumentException("bad reference kind "+refKind);
152 }
153 init(defClass, name, type, flagsMods(kindFlags, 0, refKind));
154 initResolved(false);
155 }
156
157 /** Create a name for the given reflected method. The resulting name will be in a resolved state. */
158 public static MemberName make(Method m) {
159 return make(m, false);
160 }
161
162 @SuppressWarnings("LeakingThisInConstructor")
163 private MemberName(Method m, boolean wantSpecial) {
164 m.getClass(); // NPE check
165 // fill in vmtarget, vmindex while we have m in hand:
166 MethodHandleNatives.init(this, m);
167 if (clazz == null) { // MHN.init failed
168 if (m.getDeclaringClass() == MethodHandle.class &&
169 isMethodHandleInvokeName(m.getName())) {
170 // The JVM did not reify this signature-polymorphic instance.
171 // Need a special case here.
172 // See comments on MethodHandleNatives.linkMethod.
173 MethodType type = MethodType.methodType(m.getReturnType(), m.getParameterTypes());
174 int flags = flagsMods(IS_METHOD, m.getModifiers(), REF_invokeVirtual);
175 init(MethodHandle.class, m.getName(), type, flags);
176 if (isMethodHandleInvoke()) {
177 return;
178 }
179 }
180 throw new LinkageError(m.toString());
181 }
182 assert(isResolved() && this.clazz != null);
183 this.name = m.getName();
184 if (this.type == null) {
185 this.type = new Object[] { m.getReturnType(), m.getParameterTypes() };
186 }
187 if (wantSpecial) {
188 if (isAbstract()) {
189 throw new AbstractMethodError(this.toString());
190 }
191 if (getReferenceKind() == REF_invokeVirtual) {
192 changeReferenceKind(REF_invokeSpecial, REF_invokeVirtual);
193 } else if (getReferenceKind() == REF_invokeInterface) {
194 // invokeSpecial on a default method
195 changeReferenceKind(REF_invokeSpecial, REF_invokeInterface);
196 }
197 }
198 }
199
200 public static MemberName make(Method m, boolean wantSpecial) {
201 // Unreflected member names are resolved so intern them here.
202 MemberName tmp0 = null;
203 InternTransaction tx = new InternTransaction(m.getDeclaringClass());
204 while (tmp0 == null) {
205 MemberName tmp = new MemberName(m, wantSpecial);
206 tmp0 = tx.tryIntern(tmp);
207 }
208 return tmp0;
209 }
210
211 @SuppressWarnings("LeakingThisInConstructor")
212 private MemberName(Constructor<?> ctor) {
213 ctor.getClass(); // NPE check
214 // fill in vmtarget, vmindex while we have ctor in hand:
215 MethodHandleNatives.init(this, ctor);
216 assert(isResolved() && this.clazz != null);
217 this.name = CONSTRUCTOR_NAME;
218 if (this.type == null) {
219 this.type = new Object[] { void.class, ctor.getParameterTypes() };
220 }
221 }
222
223 /**
224 * Create a name for the given reflected constructor.
225 * The resulting name will be in a resolved state.
226 */
227 public static MemberName make(Constructor<?> ctor) {
228 // Unreflected member names are resolved so intern them here.
229 MemberName tmp0 = null;
230 InternTransaction tx = new InternTransaction(ctor.getDeclaringClass());
231 while (tmp0 == null) {
232 MemberName tmp = new MemberName(ctor);
233 tmp0 = tx.tryIntern(tmp);
234 }
235 return tmp0;
236 }
237
238 /**
239 * Create a name for the given reflected field.
240 * The resulting name will be in a resolved state.
241 */
242 public static MemberName make(Field field) {
243 return make(field, false);
244 }
245
246 @SuppressWarnings("LeakingThisInConstructor")
247 private MemberName(Field field, boolean makeSetter) {
248 field.getClass(); // NPE check
249 // fill in vmtarget, vmindex while we have field in hand:
250 MethodHandleNatives.init(this, field);
251 assert(isResolved() && this.clazz != null);
252 this.name = field.getName();
253 this.type = field.getType();
254 byte refKind = this.getReferenceKind();
255 assert(refKind == (isStatic() ? REF_getStatic : REF_getField));
256 if (makeSetter) {
257 assert((REF_putStatic - REF_getStatic) == (REF_putField - REF_getField));
258 changeReferenceKind((byte)(refKind + (REF_putStatic - REF_getStatic)), refKind);
259 }
260 }
261
262 /**
263 * Create a name for the given reflected field, optionally making it a setter.
264 * The resulting name will be in a resolved state.
265 */
266 public static MemberName make(Field field, boolean makeSetter) {
267 // Unreflected member names are resolved so intern them here.
268 MemberName tmp0 = null;
269 InternTransaction tx = new InternTransaction(field.getDeclaringClass());
270 while (tmp0 == null) {
271 MemberName tmp = new MemberName(field, makeSetter);
272 tmp0 = tx.tryIntern(tmp);
273 }
274 return tmp0;
275 }
276
277 /** Initialize a query. It is not resolved. */
278 private void init(Class<?> defClass, String name, Object type, int flags) {
279 // defining class is allowed to be null (for a naked name/type pair)
280 //name.toString(); // null check
281 //type.equals(type); // null check
282 // fill in fields:
283 this.clazz = defClass;
284 this.name = name;
285 this.type = type;
286 this.flags = flags;
287 assert(testAnyFlags(ALL_KINDS));
288 assert(this.resolution == null); // nobody should have touched this yet
289 //assert(referenceKindIsConsistent()); // do this after resolution
290 }
291
292 private void initResolved(boolean isResolved) {
293 assert(this.resolution == null); // not initialized yet!
294 if (!isResolved)
295 this.resolution = this;
296 assert(isResolved() == isResolved);
297 }
298
299 /**
300 * Helper method to intern this member name in the declaring class' member name table.
301 */
302 @SuppressWarnings("unchecked")
303 private MemberName intern(int transaction_token) {
304 return jla.internMemberName(clazz, this, transaction_token);
305 }
306
307 /**
308 * Helper method to obtain the transaction token for interning, given Class clazz.
309 * @param clazz
310 * @return transaction token (class redefinition count)
311 */
312 static private int internTxnToken(Class clazz) {
313 return clazz == null ? 0 : jla.getClassRedefinedCount(clazz);
314 }
315
316 /**
317 * Helper method to obtain the transaction token for interning, given this.
318 * @return
319 */
320 private int internTxnToken() {
321 return internTxnToken(clazz);
322 }
323
324 /**
325 * Helper method to conditionally intern cloned+modified member names.
326 */
327 private MemberName intern(MemberName likeThis, int transaction_token) {
328 if (likeThis.isResolved())
329 return intern(transaction_token);
330 else
331 return this;
332 }
333
334 /**
335 * Helper class to handle the case where the class checked for no
336 * redefinition may not be correct; resolution can end up with a different
337 * class.
338 */
339 static class InternTransaction {
340 Class<?> tx_class;
341 int txn_token;
342
343 InternTransaction(Class<?> tx_class) {
344 this.tx_class = tx_class;
345 this.txn_token = internTxnToken(tx_class);
346 }
347
348 /**
349 * If member_name is not resolved, returns member_name; if is resolved,
350 * attempts to intern member_name (once) while checking for races.
351 *
352 * @param member_name
353 * @return member_name if not resolved, null if racing, otherwise
354 * value of interned member_name.
355 */
356 MemberName tryIntern(MemberName member_name) {
357 if (member_name.isResolved()) {
358 if (member_name.clazz != tx_class) {
359 Class prev_tx_class = tx_class;
360 int prev_txn_token = txn_token;
361 tx_class = member_name.clazz;
362 txn_token = internTxnToken(tx_class);
363 // Zero is a special case.
364 if (txn_token != 0 ||
365 prev_txn_token != internTxnToken(prev_tx_class)) {
366 // Resolved class is different and at least one
367 // redef of it occurred, therefore repeat with
368 // proper class for race consistency checking.
369 return null;
370 }
371 }
372 member_name = member_name.intern(txn_token);
373 if (member_name == null) {
374 // Update the token for the next try.
375 txn_token = internTxnToken(tx_class);
376 }
377 }
378 return member_name;
379 }
380 }
381
382 /** Return the declaring class of this member.
383 * In the case of a bare name and type, the declaring class will be null.
384 */
385 @Override
386 public Class<?> getDeclaringClass() {
387 return clazz;
388 }
389
390 /** Utility method producing the class loader of the declaring class. */
391 public ClassLoader getClassLoader() {
392 return clazz.getClassLoader();
393 }
394
395 /** Return the simple name of this member.
396 * For a type, it is the same as {@link Class#getSimpleName}.
397 * For a method or field, it is the simple name of the member.
398 * For a constructor, it is always {@code "<init>"}.
399 */
400 @Override
401 public String getName() {
402 if (name == null) {
403 expandFromVM();
404 if (name == null) {
405 return null;
406 }
407 }
408 return name;
409 }
410
411 public MethodType getMethodOrFieldType() {
412 if (isInvocable())
413 return getMethodType();
414 if (isGetter())
415 return MethodType.methodType(getFieldType());
416 if (isSetter())
417 return MethodType.methodType(void.class, getFieldType());
418 throw new InternalError("not a method or field: "+this);
419 }
420
421 /** Return the declared type of this member, which
422 * must be a method or constructor.
423 */
424 public MethodType getMethodType() {
425 if (type == null) {
426 expandFromVM();
427 if (type == null) {
428 return null;
429 }
430 }
431 if (!isInvocable()) {
432 throw newIllegalArgumentException("not invocable, no method type");
433 }
434
435 {
436 // Get a snapshot of type which doesn't get changed by racing threads.
437 final Object type = this.type;
438 if (type instanceof MethodType) {
439 return (MethodType) type;
440 }
441 }
442
443 // type is not a MethodType yet. Convert it thread-safely.
444 synchronized (this) {
445 if (type instanceof String) {
446 String sig = (String) type;
447 MethodType res = MethodType.fromMethodDescriptorString(sig, getClassLoader());
448 type = res;
449 } else if (type instanceof Object[]) {
450 Object[] typeInfo = (Object[]) type;
451 Class<?>[] ptypes = (Class<?>[]) typeInfo[1];
452 Class<?> rtype = (Class<?>) typeInfo[0];
453 MethodType res = MethodType.methodType(rtype, ptypes);
454 type = res;
455 }
456 // Make sure type is a MethodType for racing threads.
457 assert type instanceof MethodType : "bad method type " + type;
458 }
459 return (MethodType) type;
460 }
461
462 /** Return the actual type under which this method or constructor must be invoked.
463 * For non-static methods or constructors, this is the type with a leading parameter,
464 * a reference to declaring class. For static methods, it is the same as the declared type.
465 */
466 public MethodType getInvocationType() {
467 MethodType itype = getMethodOrFieldType();
468 if (isConstructor() && getReferenceKind() == REF_newInvokeSpecial)
469 return itype.changeReturnType(clazz);
470 if (!isStatic())
471 return itype.insertParameterTypes(0, clazz);
472 return itype;
473 }
474
475 /** Utility method producing the parameter types of the method type. */
476 public Class<?>[] getParameterTypes() {
477 return getMethodType().parameterArray();
478 }
479
480 /** Utility method producing the return type of the method type. */
481 public Class<?> getReturnType() {
482 return getMethodType().returnType();
483 }
484
485 /** Return the declared type of this member, which
486 * must be a field or type.
487 * If it is a type member, that type itself is returned.
488 */
489 public Class<?> getFieldType() {
490 if (type == null) {
491 expandFromVM();
492 if (type == null) {
493 return null;
494 }
495 }
496 if (isInvocable()) {
497 throw newIllegalArgumentException("not a field or nested class, no simple type");
498 }
499
500 {
501 // Get a snapshot of type which doesn't get changed by racing threads.
502 final Object type = this.type;
503 if (type instanceof Class<?>) {
504 return (Class<?>) type;
505 }
506 }
507
508 // type is not a Class yet. Convert it thread-safely.
509 synchronized (this) {
510 if (type instanceof String) {
511 String sig = (String) type;
512 MethodType mtype = MethodType.fromMethodDescriptorString("()"+sig, getClassLoader());
513 Class<?> res = mtype.returnType();
514 type = res;
515 }
516 // Make sure type is a Class for racing threads.
517 assert type instanceof Class<?> : "bad field type " + type;
518 }
519 return (Class<?>) type;
520 }
521
522 /** Utility method to produce either the method type or field type of this member. */
523 public Object getType() {
524 return (isInvocable() ? getMethodType() : getFieldType());
525 }
526
527 /** Utility method to produce the signature of this member,
528 * used within the class file format to describe its type.
529 */
530 public String getSignature() {
531 if (type == null) {
532 expandFromVM();
533 if (type == null) {
534 return null;
535 }
536 }
537 if (isInvocable())
538 return BytecodeDescriptor.unparse(getMethodType());
539 else
540 return BytecodeDescriptor.unparse(getFieldType());
541 }
542
543 /** Return the modifier flags of this member.
544 * @see java.lang.reflect.Modifier
545 */
546 @Override
547 public int getModifiers() {
548 return (flags & RECOGNIZED_MODIFIERS);
549 }
550
551 /** Return the reference kind of this member, or zero if none.
552 */
553 public byte getReferenceKind() {
554 return (byte) ((flags >>> MN_REFERENCE_KIND_SHIFT) & MN_REFERENCE_KIND_MASK);
555 }
556 private boolean referenceKindIsConsistent() {
557 byte refKind = getReferenceKind();
558 if (refKind == REF_NONE) return isType();
559 if (isField()) {
560 assert(staticIsConsistent());
561 assert(MethodHandleNatives.refKindIsField(refKind));
562 } else if (isConstructor()) {
563 assert(refKind == REF_newInvokeSpecial || refKind == REF_invokeSpecial);
564 } else if (isMethod()) {
565 assert(staticIsConsistent());
566 assert(MethodHandleNatives.refKindIsMethod(refKind));
567 if (clazz.isInterface())
568 assert(refKind == REF_invokeInterface ||
569 refKind == REF_invokeStatic ||
570 refKind == REF_invokeSpecial ||
571 refKind == REF_invokeVirtual && isObjectPublicMethod());
572 } else {
573 assert(false);
574 }
575 return true;
576 }
577 private boolean isObjectPublicMethod() {
578 if (clazz == Object.class) return true;
579 MethodType mtype = getMethodType();
580 if (name.equals("toString") && mtype.returnType() == String.class && mtype.parameterCount() == 0)
581 return true;
582 if (name.equals("hashCode") && mtype.returnType() == int.class && mtype.parameterCount() == 0)
583 return true;
584 if (name.equals("equals") && mtype.returnType() == boolean.class && mtype.parameterCount() == 1 && mtype.parameterType(0) == Object.class)
585 return true;
586 return false;
587 }
588 /*non-public*/ boolean referenceKindIsConsistentWith(int originalRefKind) {
589 int refKind = getReferenceKind();
590 if (refKind == originalRefKind) return true;
591 switch (originalRefKind) {
592 case REF_invokeInterface:
593 // Looking up an interface method, can get (e.g.) Object.hashCode
594 assert(refKind == REF_invokeVirtual ||
595 refKind == REF_invokeSpecial) : this;
596 return true;
597 case REF_invokeVirtual:
598 case REF_newInvokeSpecial:
599 // Looked up a virtual, can get (e.g.) final String.hashCode.
600 assert(refKind == REF_invokeSpecial) : this;
601 return true;
602 }
603 assert(false) : this+" != "+MethodHandleNatives.refKindName((byte)originalRefKind);
604 return true;
605 }
606 private boolean staticIsConsistent() {
607 byte refKind = getReferenceKind();
608 return MethodHandleNatives.refKindIsStatic(refKind) == isStatic() || getModifiers() == 0;
609 }
610 private boolean vminfoIsConsistent() {
611 byte refKind = getReferenceKind();
612 assert(isResolved()); // else don't call
613 Object vminfo = MethodHandleNatives.getMemberVMInfo(this);
614 assert(vminfo instanceof Object[]);
615 long vmindex = (Long) ((Object[])vminfo)[0];
616 Object vmtarget = ((Object[])vminfo)[1];
617 if (MethodHandleNatives.refKindIsField(refKind)) {
618 assert(vmindex >= 0) : vmindex + ":" + this;
619 assert(vmtarget instanceof Class);
620 } else {
621 if (MethodHandleNatives.refKindDoesDispatch(refKind))
622 assert(vmindex >= 0) : vmindex + ":" + this;
623 else
624 assert(vmindex < 0) : vmindex;
625 assert(vmtarget instanceof MemberName) : vmtarget + " in " + this;
626 }
627 return true;
628 }
629
630 private MemberName changeReferenceKind(byte refKind, byte oldKind) {
631 assert(getReferenceKind() == oldKind);
632 assert(MethodHandleNatives.refKindIsValid(refKind));
633 flags += (((int)refKind - oldKind) << MN_REFERENCE_KIND_SHIFT);
634 return this;
635 }
636
637 private boolean testFlags(int mask, int value) {
638 return (flags & mask) == value;
639 }
640 private boolean testAllFlags(int mask) {
641 return testFlags(mask, mask);
642 }
643 private boolean testAnyFlags(int mask) {
644 return !testFlags(mask, 0);
645 }
646
647 /** Utility method to query if this member is a method handle invocation (invoke or invokeExact).
648 * Also returns true for the non-public MH.invokeBasic.
649 */
650 public boolean isMethodHandleInvoke() {
651 final int bits = MH_INVOKE_MODS &~ Modifier.PUBLIC;
652 final int negs = Modifier.STATIC;
653 if (testFlags(bits | negs, bits) &&
654 clazz == MethodHandle.class) {
655 return isMethodHandleInvokeName(name);
656 }
657 return false;
658 }
659 public static boolean isMethodHandleInvokeName(String name) {
660 switch (name) {
661 case "invoke":
662 case "invokeExact":
663 case "invokeBasic": // internal sig-poly method
664 return true;
665 default:
666 return false;
667 }
668 }
669 private static final int MH_INVOKE_MODS = Modifier.NATIVE | Modifier.FINAL | Modifier.PUBLIC;
670
671 /** Utility method to query the modifier flags of this member. */
672 public boolean isStatic() {
673 return Modifier.isStatic(flags);
674 }
675 /** Utility method to query the modifier flags of this member. */
676 public boolean isPublic() {
677 return Modifier.isPublic(flags);
678 }
679 /** Utility method to query the modifier flags of this member. */
680 public boolean isPrivate() {
681 return Modifier.isPrivate(flags);
682 }
683 /** Utility method to query the modifier flags of this member. */
684 public boolean isProtected() {
685 return Modifier.isProtected(flags);
686 }
687 /** Utility method to query the modifier flags of this member. */
688 public boolean isFinal() {
689 return Modifier.isFinal(flags);
690 }
691 /** Utility method to query whether this member or its defining class is final. */
692 public boolean canBeStaticallyBound() {
693 return Modifier.isFinal(flags | clazz.getModifiers());
694 }
695 /** Utility method to query the modifier flags of this member. */
696 public boolean isVolatile() {
697 return Modifier.isVolatile(flags);
698 }
699 /** Utility method to query the modifier flags of this member. */
700 public boolean isAbstract() {
701 return Modifier.isAbstract(flags);
702 }
703 /** Utility method to query the modifier flags of this member. */
704 public boolean isNative() {
705 return Modifier.isNative(flags);
706 }
707 // let the rest (native, volatile, transient, etc.) be tested via Modifier.isFoo
708
709 // unofficial modifier flags, used by HotSpot:
710 static final int BRIDGE = 0x00000040;
711 static final int VARARGS = 0x00000080;
712 static final int SYNTHETIC = 0x00001000;
713 static final int ANNOTATION= 0x00002000;
714 static final int ENUM = 0x00004000;
715 /** Utility method to query the modifier flags of this member; returns false if the member is not a method. */
716 public boolean isBridge() {
717 return testAllFlags(IS_METHOD | BRIDGE);
718 }
719 /** Utility method to query the modifier flags of this member; returns false if the member is not a method. */
720 public boolean isVarargs() {
721 return testAllFlags(VARARGS) && isInvocable();
722 }
723 /** Utility method to query the modifier flags of this member; returns false if the member is not a method. */
724 @Override
725 public boolean isSynthetic() {
726 return testAllFlags(SYNTHETIC);
727 }
728
729 static final String CONSTRUCTOR_NAME = "<init>"; // the ever-popular
730
731 // modifiers exported by the JVM:
732 static final int RECOGNIZED_MODIFIERS = 0xFFFF;
733
734 // private flags, not part of RECOGNIZED_MODIFIERS:
735 static final int
736 IS_METHOD = MN_IS_METHOD, // method (not constructor)
737 IS_CONSTRUCTOR = MN_IS_CONSTRUCTOR, // constructor
738 IS_FIELD = MN_IS_FIELD, // field
739 IS_TYPE = MN_IS_TYPE, // nested type
740 CALLER_SENSITIVE = MN_CALLER_SENSITIVE; // @CallerSensitive annotation detected
741
742 static final int ALL_ACCESS = Modifier.PUBLIC | Modifier.PRIVATE | Modifier.PROTECTED;
743 static final int ALL_KINDS = IS_METHOD | IS_CONSTRUCTOR | IS_FIELD | IS_TYPE;
744 static final int IS_INVOCABLE = IS_METHOD | IS_CONSTRUCTOR;
745 static final int IS_FIELD_OR_METHOD = IS_METHOD | IS_FIELD;
746 static final int SEARCH_ALL_SUPERS = MN_SEARCH_SUPERCLASSES | MN_SEARCH_INTERFACES;
747
748 /** Utility method to query whether this member is a method or constructor. */
749 public boolean isInvocable() {
750 return testAnyFlags(IS_INVOCABLE);
751 }
752 /** Utility method to query whether this member is a method, constructor, or field. */
753 public boolean isFieldOrMethod() {
754 return testAnyFlags(IS_FIELD_OR_METHOD);
755 }
756 /** Query whether this member is a method. */
757 public boolean isMethod() {
758 return testAllFlags(IS_METHOD);
759 }
760 /** Query whether this member is a constructor. */
761 public boolean isConstructor() {
762 return testAllFlags(IS_CONSTRUCTOR);
763 }
764 /** Query whether this member is a field. */
765 public boolean isField() {
766 return testAllFlags(IS_FIELD);
767 }
768 /** Query whether this member is a type. */
769 public boolean isType() {
770 return testAllFlags(IS_TYPE);
771 }
772 /** Utility method to query whether this member is neither public, private, nor protected. */
773 public boolean isPackage() {
774 return !testAnyFlags(ALL_ACCESS);
775 }
776 /** Query whether this member has a CallerSensitive annotation. */
777 public boolean isCallerSensitive() {
778 return testAllFlags(CALLER_SENSITIVE);
779 }
780
781 /** Utility method to query whether this member is accessible from a given lookup class. */
782 public boolean isAccessibleFrom(Class<?> lookupClass) {
783 return VerifyAccess.isMemberAccessible(this.getDeclaringClass(), this.getDeclaringClass(), flags,
784 lookupClass, ALL_ACCESS|MethodHandles.Lookup.PACKAGE);
785 }
786
787 /**
788 * Calls down to the VM to fill in the fields. This method is
789 * synchronized to avoid racing calls.
790 */
791 private void expandFromVM() {
792 if (type != null) {
793 return;
794 }
795 if (!isResolved()) {
796 return;
797 }
798 MethodHandleNatives.expand(this);
799 }
800
801 // Capturing information from the Core Reflection API:
802 private static int flagsMods(int flags, int mods, byte refKind) {
803 assert((flags & RECOGNIZED_MODIFIERS) == 0);
804 assert((mods & ~RECOGNIZED_MODIFIERS) == 0);
805 assert((refKind & ~MN_REFERENCE_KIND_MASK) == 0);
806 return flags | mods | (refKind << MN_REFERENCE_KIND_SHIFT);
807 }
808
809 public MemberName asSpecial() {
810 switch (getReferenceKind()) {
811 case REF_invokeSpecial: return this;
812 case REF_invokeVirtual: return cloneAndChangeReferenceKindAndIntern(REF_invokeSpecial, REF_invokeVirtual);
813 case REF_invokeInterface: return cloneAndChangeReferenceKindAndIntern(REF_invokeSpecial, REF_invokeInterface);
814 case REF_newInvokeSpecial: return cloneAndChangeReferenceKindAndIntern(REF_invokeSpecial, REF_newInvokeSpecial);
815 }
816 throw new IllegalArgumentException(this.toString());
817 }
818 /** If this MN is not REF_newInvokeSpecial, return a clone with that ref. kind.
819 * In that case it must already be REF_invokeSpecial.
820 */
821 public MemberName asConstructor() {
822 switch (getReferenceKind()) {
823 case REF_invokeSpecial: return cloneAndChangeReferenceKindAndIntern(REF_newInvokeSpecial, REF_invokeSpecial);
824 case REF_newInvokeSpecial: return this;
825 }
826 throw new IllegalArgumentException(this.toString());
827 }
828 /** If this MN is a REF_invokeSpecial, return a clone with the "normal" kind
829 * REF_invokeVirtual; also switch either to REF_invokeInterface if clazz.isInterface.
830 * The end result is to get a fully virtualized version of the MN.
831 * (Note that resolving in the JVM will sometimes devirtualize, changing
832 * REF_invokeVirtual of a final to REF_invokeSpecial, and REF_invokeInterface
833 * in some corner cases to either of the previous two; this transform
834 * undoes that change under the assumption that it occurred.)
835 */
836 public MemberName asNormalOriginal() {
837 byte normalVirtual = clazz.isInterface() ? REF_invokeInterface : REF_invokeVirtual;
838 byte refKind = getReferenceKind();
839 byte newRefKind = refKind;
840 MemberName result = this;
841 switch (refKind) {
842 case REF_invokeInterface:
843 case REF_invokeVirtual:
844 case REF_invokeSpecial:
845 newRefKind = normalVirtual;
846 break;
847 }
848 if (newRefKind == refKind)
849 return this;
850 result = cloneAndChangeReferenceKindAndIntern(newRefKind, refKind);
851 assert(this.referenceKindIsConsistentWith(result.getReferenceKind()));
852 return result;
853 }
854
855 /**
856 * Clones, changes reference kind in the clone, and if this is resolved,
857 * also interns the result, repeating the intern operation till it succeeds.
858 *
859 * @param refKind
860 * @param oldKind
861 * @return
862 */
863 private MemberName cloneAndChangeReferenceKindAndIntern(byte refKind, byte oldKind) {
864 MemberName tmp0 = null;
865 while (tmp0 == null) {
866 int tx_token = internTxnToken(); // this and clone will have same token
867 tmp0 = clone().changeReferenceKind(refKind, oldKind).intern(this, tx_token);
868 }
869 return tmp0;
870 }
871
872 public boolean isGetter() {
873 return MethodHandleNatives.refKindIsGetter(getReferenceKind());
874 }
875 public boolean isSetter() {
876 return MethodHandleNatives.refKindIsSetter(getReferenceKind());
877 }
878 public MemberName asSetter() {
879 byte refKind = getReferenceKind();
880 assert(MethodHandleNatives.refKindIsGetter(refKind));
881 assert((REF_putStatic - REF_getStatic) == (REF_putField - REF_getField));
882 byte setterRefKind = (byte)(refKind + (REF_putField - REF_getField));
883 return cloneAndChangeReferenceKindAndIntern(setterRefKind, refKind);
884 }
885 /**
886 * Create a name for a signature-polymorphic invoker.
887 * This is a placeholder for a signature-polymorphic instance
888 * (of MH.invokeExact, etc.) that the JVM does not reify.
889 * The returned MemberName is not resolved.
890 * See comments on {@link MethodHandleNatives#linkMethod}.
891 */
892 static MemberName makeMethodHandleInvoke(String name, MethodType type) {
893 return makeMethodHandleInvoke(name, type, MH_INVOKE_MODS | SYNTHETIC);
894 }
895 static MemberName makeMethodHandleInvoke(String name, MethodType type, int mods) {
896 MemberName mem = new MemberName(MethodHandle.class, name, type, REF_invokeVirtual);
897 mem.flags |= mods; // it's not resolved, but add these modifiers anyway
898 assert(mem.isMethodHandleInvoke()) : mem;
899 return mem;
900 }
901
902 // locally useful cloner
903 @Override protected MemberName clone() {
904 try {
905 return (MemberName) super.clone();
906 } catch (CloneNotSupportedException ex) {
907 throw newInternalError(ex);
908 }
909 }
910
911 /** Get the definition of this member name.
912 * This may be in a super-class of the declaring class of this member.
913 */
914 public MemberName getDefinition() {
915 if (!isResolved()) throw new IllegalStateException("must be resolved: "+this);
916 if (isType()) return this;
917 MemberName res = this.clone();
918 res.clazz = null;
919 res.type = null;
920 res.name = null;
921 res.resolution = res;
922 res.expandFromVM();
923 assert(res.getName().equals(this.getName()));
924 return res;
925 }
926
927 @Override
928 public int hashCode() {
929 return Objects.hash(clazz, getReferenceKind(), name, getType());
930 }
931 @Override
932 public boolean equals(Object that) {
933 return (that instanceof MemberName && this.equals((MemberName)that));
934 }
935
936 /** Decide if two member names have exactly the same symbolic content.
937 * Does not take into account any actual class members, so even if
938 * two member names resolve to the same actual member, they may
939 * be distinct references.
940 */
941 public boolean equals(MemberName that) {
942 if (this == that) return true;
943 if (that == null) return false;
944 return this.clazz == that.clazz
945 && this.getReferenceKind() == that.getReferenceKind()
946 && Objects.equals(this.name, that.name)
947 && Objects.equals(this.getType(), that.getType());
948 }
949
950 @Override
951 public int compareTo(Object o) {
952 MemberName that = (MemberName) o;
953
954 /* First test equals. This make the ordering checks easier because we
955 * don't have to be precise and can use hash codes.
956 */
957 if (equals(that)) {
958 return 0;
959 }
960
961 int diff = Integer.compare(this.name.hashCode(), that.name.hashCode());
962 if (diff != 0) {
963 return diff;
964 }
965
966 diff = this.getReferenceKind() - that.getReferenceKind();
967 if (diff != 0) {
968 return diff;
969 }
970
971 diff = Integer.compare(this.getType().hashCode(), that.getType().hashCode());
972 if (diff != 0) {
973 return diff;
974 }
975
976 // Hashcodes apparently collided, try more detail.
977 diff = this.name.compareTo(that.name);
978 if (diff != 0) {
979 return diff;
980 }
981
982 // The classes ought to all be equal anyway in the usual use of
983 // compareTo, so check these later,
984 // but before comparing getType.toString().
985 diff = Integer.compare(this.clazz.hashCode(),that.clazz.hashCode());
986 if (diff != 0) {
987 return diff;
988 }
989
990 diff = this.clazz.getName().compareTo(that.clazz.getName());
991 if (diff != 0) {
992 return diff;
993 }
994
995 diff = this.getType().toString().compareTo(that.getType().toString());
996 if (diff != 0) {
997 return diff;
998 }
999
1000 // Nothing left but classLoaders.
1001 ClassLoader thisCl = this.getClassLoader();
1002 ClassLoader thatCl = that.getClassLoader();
1003
1004 if (thisCl == thatCl) return 0;
1005
1006 diff = Integer.compare(thisCl == null ? 0 : thisCl.hashCode(),
1007 thatCl == null ? 0 : thatCl.hashCode());
1008
1009 return diff;
1010 }
1011
1012 /** Query whether this member name is resolved to a non-static, non-final method.
1013 */
1014 public boolean hasReceiverTypeDispatch() {
1015 return MethodHandleNatives.refKindDoesDispatch(getReferenceKind());
1016 }
1017
1018 /** Query whether this member name is resolved.
1019 * A resolved member name is one for which the JVM has found
1020 * a method, constructor, field, or type binding corresponding exactly to the name.
1021 * (Document?)
1022 */
1023 public boolean isResolved() {
1024 return resolution == null;
1025 }
1026
1027 void checkForTypeAlias() {
1028 if (isInvocable()) {
1029 MethodType type;
1030 if (this.type instanceof MethodType)
1031 type = (MethodType) this.type;
1032 else
1033 this.type = type = getMethodType();
1034 if (type.erase() == type) return;
1035 if (VerifyAccess.isTypeVisible(type, clazz)) return;
1036 throw new LinkageError("bad method type alias: "+type+" not visible from "+clazz);
1037 } else {
1038 Class<?> type;
1039 if (this.type instanceof Class<?>)
1040 type = (Class<?>) this.type;
1041 else
1042 this.type = type = getFieldType();
1043 if (VerifyAccess.isTypeVisible(type, clazz)) return;
1044 throw new LinkageError("bad field type alias: "+type+" not visible from "+clazz);
1045 }
1046 }
1047
1048
1049 /** Produce a string form of this member name.
1050 * For types, it is simply the type's own string (as reported by {@code toString}).
1051 * For fields, it is {@code "DeclaringClass.name/type"}.
1052 * For methods and constructors, it is {@code "DeclaringClass.name(ptype...)rtype"}.
1053 * If the declaring class is null, the prefix {@code "DeclaringClass."} is omitted.
1054 * If the member is unresolved, a prefix {@code "*."} is prepended.
1055 */
1056 @SuppressWarnings("LocalVariableHidesMemberVariable")
1057 @Override
1058 public String toString() {
1059 if (isType())
1060 return type.toString(); // class java.lang.String
1061 // else it is a field, method, or constructor
1062 StringBuilder buf = new StringBuilder();
1063 if (getDeclaringClass() != null) {
1064 buf.append(getName(clazz));
1065 buf.append('.');
1066 }
1067 String name = getName();
1068 buf.append(name == null ? "*" : name);
1069 Object type = getType();
1070 if (!isInvocable()) {
1071 buf.append('/');
1072 buf.append(type == null ? "*" : getName(type));
1073 } else {
1074 buf.append(type == null ? "(*)*" : getName(type));
1075 }
1076 byte refKind = getReferenceKind();
1077 if (refKind != REF_NONE) {
1078 buf.append('/');
1079 buf.append(MethodHandleNatives.refKindName(refKind));
1080 }
1081 //buf.append("#").append(System.identityHashCode(this));
1082 return buf.toString();
1083 }
1084 private static String getName(Object obj) {
1085 if (obj instanceof Class<?>)
1086 return ((Class<?>)obj).getName();
1087 return String.valueOf(obj);
1088 }
1089
1090 public IllegalAccessException makeAccessException(String message, Object from) {
1091 message = message + ": "+ toString();
1092 if (from != null) message += ", from " + from;
1093 return new IllegalAccessException(message);
1094 }
1095 private String message() {
1096 if (isResolved())
1097 return "no access";
1098 else if (isConstructor())
1099 return "no such constructor";
1100 else if (isMethod())
1101 return "no such method";
1102 else
1103 return "no such field";
1104 }
1105 public ReflectiveOperationException makeAccessException() {
1106 String message = message() + ": "+ toString();
1107 ReflectiveOperationException ex;
1108 if (isResolved() || !(resolution instanceof NoSuchMethodError ||
1109 resolution instanceof NoSuchFieldError))
1110 ex = new IllegalAccessException(message);
1111 else if (isConstructor())
1112 ex = new NoSuchMethodException(message);
1113 else if (isMethod())
1114 ex = new NoSuchMethodException(message);
1115 else
1116 ex = new NoSuchFieldException(message);
1117 if (resolution instanceof Throwable)
1118 ex.initCause((Throwable) resolution);
1119 return ex;
1120 }
1121
1122 /** Actually making a query requires an access check. */
1123 /*non-public*/ static Factory getFactory() {
1124 return Factory.INSTANCE;
1125 }
1126 /** A factory type for resolving member names with the help of the VM.
1127 * TBD: Define access-safe public constructors for this factory.
1128 */
1129 /*non-public*/ static class Factory {
1130 private Factory() { } // singleton pattern
1131 static Factory INSTANCE = new Factory();
1132
1133 private final static int ALLOWED_FLAGS = ALL_KINDS;
1134
1135 /// Queries
1136 List<MemberName> getMembers(Class<?> defc,
1137 String matchName, Object matchType,
1138 int matchFlags, Class<?> lookupClass) {
1139 matchFlags &= ALLOWED_FLAGS;
1140 String matchSig = null;
1141 if (matchType != null) {
1142 matchSig = BytecodeDescriptor.unparse(matchType);
1143 if (matchSig.startsWith("("))
1144 matchFlags &= ~(ALL_KINDS & ~IS_INVOCABLE);
1145 else
1146 matchFlags &= ~(ALL_KINDS & ~IS_FIELD);
1147 }
1148 final int BUF_MAX = 0x2000;
1149 int len1 = matchName == null ? 10 : matchType == null ? 4 : 1;
1150 MemberName[] buf = newMemberBuffer(len1);
1151 int totalCount = 0;
1152 ArrayList<MemberName[]> bufs = null;
1153 int bufCount = 0;
1154 for (;;) {
1155 bufCount = MethodHandleNatives.getMembers(defc,
1156 matchName, matchSig, matchFlags,
1157 lookupClass,
1158 totalCount, buf);
1159 if (bufCount <= buf.length) {
1160 if (bufCount < 0) bufCount = 0;
1161 totalCount += bufCount;
1162 break;
1163 }
1164 // JVM returned to us with an intentional overflow!
1165 totalCount += buf.length;
1166 int excess = bufCount - buf.length;
1167 if (bufs == null) bufs = new ArrayList<>(1);
1168 bufs.add(buf);
1169 int len2 = buf.length;
1170 len2 = Math.max(len2, excess);
1171 len2 = Math.max(len2, totalCount / 4);
1172 buf = newMemberBuffer(Math.min(BUF_MAX, len2));
1173 }
1174 ArrayList<MemberName> result = new ArrayList<>(totalCount);
1175 if (bufs != null) {
1176 for (MemberName[] buf0 : bufs) {
1177 Collections.addAll(result, buf0);
1178 }
1179 }
1180 result.addAll(Arrays.asList(buf).subList(0, bufCount));
1181 // Signature matching is not the same as type matching, since
1182 // one signature might correspond to several types.
1183 // So if matchType is a Class or MethodType, refilter the results.
1184 if (matchType != null && matchType != matchSig) {
1185 for (Iterator<MemberName> it = result.iterator(); it.hasNext();) {
1186 MemberName m = it.next();
1187 if (!matchType.equals(m.getType()))
1188 it.remove();
1189 }
1190 }
1191 return result;
1192 }
1193 /** Produce a resolved version of the given member.
1194 * Super types are searched (for inherited members) if {@code searchSupers} is true.
1195 * Access checking is performed on behalf of the given {@code lookupClass}.
1196 * If lookup fails or access is not permitted, null is returned.
1197 * Otherwise a fresh copy of the given member is returned, with modifier bits filled in.
1198 */
1199 private static MemberName resolve(byte refKind, MemberName ref, Class<?> lookupClass) {
1200 MemberName m = ref.clone(); // JVM will side-effect the ref
1201 assert(refKind == m.getReferenceKind());
1202 try {
1203 m = MethodHandleNatives.resolve(m, lookupClass);
1204 m.checkForTypeAlias();
1205 m.resolution = null;
1206 } catch (LinkageError ex) {
1207 // JVM reports that the "bytecode behavior" would get an error
1208 assert(!m.isResolved());
1209 m.resolution = ex;
1210 return m;
1211 }
1212 assert(m.referenceKindIsConsistent());
1213 m.initResolved(true);
1214 assert(m.vminfoIsConsistent());
1215 // m = m.intern(); // do not intern -- caller should intern instead.
1216 return m;
1217 }
1218 /** Produce a resolved version of the given member.
1219 * Super types are searched (for inherited members) if {@code searchSupers} is true.
1220 * Access checking is performed on behalf of the given {@code lookupClass}.
1221 * If lookup fails or access is not permitted, a {@linkplain ReflectiveOperationException} is thrown.
1222 * Otherwise the given member or its interned copy is returned, with modifier bits filled in.
1223 */
1224 public
1225 <NoSuchMemberException extends ReflectiveOperationException>
1226 MemberName resolveOrFail(byte refKind, MemberName m, Class<?> lookupClass,
1227 Class<NoSuchMemberException> nsmClass)
1228 throws IllegalAccessException, NoSuchMemberException {
1229 MemberName result = resolveOrNot(refKind, m, lookupClass);
1230
1231 if (result.isResolved()) {
1232 return result;
1233 } else { // not resolved, throw exception
1234 ReflectiveOperationException ex = result.makeAccessException();
1235 if (ex instanceof IllegalAccessException) {
1236 throw (IllegalAccessException) ex;
1237 }
1238 throw nsmClass.cast(ex);
1239 }
1240 }
1241 /** Produce a resolved version of the given member.
1242 * Super types are searched (for inherited members) if {@code searchSupers} is true.
1243 * Access checking is performed on behalf of the given {@code lookupClass}.
1244 * If lookup fails or access is not permitted, return null.
1245 * Otherwise the given member or its interned copy is returned, with modifier bits filled in.
1246 */
1247 public
1248 MemberName resolveOrNull(byte refKind, MemberName m, Class<?> lookupClass) {
1249 MemberName result = resolveOrNot(refKind, m, lookupClass);
1250 return result.isResolved() ? result : null;
1251 }
1252
1253 private static
1254 MemberName resolveOrNot(byte refKind, MemberName m, Class<?> lookupClass) {
1255 MemberName result = null;
1256 Class tx_class = m.clazz; // Guess a class for race detection.
1257 while (result == null) { // iterate till no race.
1258 int txn_token = internTxnToken(tx_class);
1259
1260 MemberName result0 = resolve(refKind, m, lookupClass);
1261
1262 if (result0.isResolved()) {
1263 if (result0.clazz != tx_class) { // Confirm/correct guess
1264 Class prev_tx_class = tx_class;
1265 int prev_txn_token = txn_token;
1266 tx_class = result0.clazz;
1267 txn_token = internTxnToken(tx_class);
1268 // The guess may be good enough
1269 if (txn_token != 0 ||
1270 prev_txn_token != internTxnToken(prev_tx_class)) {
1271 // Resolved class is different and at least one
1272 // redef occurred, therefore repeat with
1273 // proper class for race consistency checking.
1274 continue;
1275 }
1276 }
1277 result = result0.intern(txn_token);
1278 } else { // Resolution failed, do not intern, return unresolved MemberName
1279 return result0;
1280 }
1281 }
1282 return result;
1283 }
1284
1285 /** Return a list of all methods defined by the given class.
1286 * Super types are searched (for inherited members) if {@code searchSupers} is true.
1287 * Access checking is performed on behalf of the given {@code lookupClass}.
1288 * Inaccessible members are not added to the last.
1289 */
1290 public List<MemberName> getMethods(Class<?> defc, boolean searchSupers,
1291 Class<?> lookupClass) {
1292 return getMethods(defc, searchSupers, null, null, lookupClass);
1293 }
1294 /** Return a list of matching methods defined by the given class.
1295 * Super types are searched (for inherited members) if {@code searchSupers} is true.
1296 * Returned methods will match the name (if not null) and the type (if not null).
1297 * Access checking is performed on behalf of the given {@code lookupClass}.
1298 * Inaccessible members are not added to the last.
1299 */
1300 public List<MemberName> getMethods(Class<?> defc, boolean searchSupers,
1301 String name, MethodType type, Class<?> lookupClass) {
1302 int matchFlags = IS_METHOD | (searchSupers ? SEARCH_ALL_SUPERS : 0);
1303 return getMembers(defc, name, type, matchFlags, lookupClass);
1304 }
1305 /** Return a list of all constructors defined by the given class.
1306 * Access checking is performed on behalf of the given {@code lookupClass}.
1307 * Inaccessible members are not added to the last.
1308 */
1309 public List<MemberName> getConstructors(Class<?> defc, Class<?> lookupClass) {
1310 return getMembers(defc, null, null, IS_CONSTRUCTOR, lookupClass);
1311 }
1312 /** Return a list of all fields defined by the given class.
1313 * Super types are searched (for inherited members) if {@code searchSupers} is true.
1314 * Access checking is performed on behalf of the given {@code lookupClass}.
1315 * Inaccessible members are not added to the last.
1316 */
1317 public List<MemberName> getFields(Class<?> defc, boolean searchSupers,
1318 Class<?> lookupClass) {
1319 return getFields(defc, searchSupers, null, null, lookupClass);
1320 }
1321 /** Return a list of all fields defined by the given class.
1322 * Super types are searched (for inherited members) if {@code searchSupers} is true.
1323 * Returned fields will match the name (if not null) and the type (if not null).
1324 * Access checking is performed on behalf of the given {@code lookupClass}.
1325 * Inaccessible members are not added to the last.
1326 */
1327 public List<MemberName> getFields(Class<?> defc, boolean searchSupers,
1328 String name, Class<?> type, Class<?> lookupClass) {
1329 int matchFlags = IS_FIELD | (searchSupers ? SEARCH_ALL_SUPERS : 0);
1330 return getMembers(defc, name, type, matchFlags, lookupClass);
1331 }
1332 /** Return a list of all nested types defined by the given class.
1333 * Super types are searched (for inherited members) if {@code searchSupers} is true.
1334 * Access checking is performed on behalf of the given {@code lookupClass}.
1335 * Inaccessible members are not added to the last.
1336 */
1337 public List<MemberName> getNestedTypes(Class<?> defc, boolean searchSupers,
1338 Class<?> lookupClass) {
1339 int matchFlags = IS_TYPE | (searchSupers ? SEARCH_ALL_SUPERS : 0);
1340 return getMembers(defc, null, null, matchFlags, lookupClass);
1341 }
1342 private static MemberName[] newMemberBuffer(int length) {
1343 MemberName[] buf = new MemberName[length];
1344 // fill the buffer with dummy structs for the JVM to fill in
1345 for (int i = 0; i < length; i++)
1346 buf[i] = new MemberName();
1347 return buf;
1348 }
1349 }
1350 }