1 /*
2 * Copyright (c) 2012, 2022, 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.reflect;
27
28 import java.lang.annotation.Annotation;
29 import java.util.Arrays;
30 import java.util.Map;
31 import java.util.Set;
32 import java.util.Objects;
33 import java.util.StringJoiner;
34 import java.util.stream.Collectors;
35
36 import jdk.internal.access.SharedSecrets;
37 import jdk.internal.vm.annotation.Stable;
38 import jdk.internal.value.PrimitiveClass;
39 import sun.reflect.annotation.AnnotationParser;
40 import sun.reflect.annotation.AnnotationSupport;
41 import sun.reflect.annotation.TypeAnnotationParser;
42 import sun.reflect.annotation.TypeAnnotation;
43 import sun.reflect.generics.reflectiveObjects.ParameterizedTypeImpl;
44 import sun.reflect.generics.repository.ConstructorRepository;
45
46 /**
47 * A shared superclass for the common functionality of {@link Method}
48 * and {@link Constructor}.
49 *
50 * @since 1.8
51 */
52 public abstract sealed class Executable extends AccessibleObject
53 implements Member, GenericDeclaration permits Constructor, Method {
54 /*
55 * Only grant package-visibility to the constructor.
56 */
57 @SuppressWarnings("deprecation")
58 Executable() {}
59
60 /**
61 * Accessor method to allow code sharing
62 */
63 abstract byte[] getAnnotationBytes();
64
65 /**
66 * Does the Executable have generic information.
67 */
68 abstract boolean hasGenericInformation();
69
70 abstract ConstructorRepository getGenericInfo();
71
72 boolean equalParamTypes(Class<?>[] params1, Class<?>[] params2) {
73 /* Avoid unnecessary cloning */
74 if (params1.length == params2.length) {
75 for (int i = 0; i < params1.length; i++) {
76 if (params1[i] != params2[i])
77 return false;
78 }
79 return true;
80 }
81 return false;
82 }
83
84 Annotation[][] parseParameterAnnotations(byte[] parameterAnnotations) {
85 return AnnotationParser.parseParameterAnnotations(
86 parameterAnnotations,
87 SharedSecrets.getJavaLangAccess().
88 getConstantPool(getDeclaringClass()),
89 getDeclaringClass());
90 }
91
92 void printModifiersIfNonzero(StringBuilder sb, int mask, boolean isDefault) {
93 int mod = getModifiers() & mask;
94
95 if (mod != 0 && !isDefault) {
96 sb.append(Modifier.toString(mod)).append(' ');
97 } else {
98 int access_mod = mod & Modifier.ACCESS_MODIFIERS;
99 if (access_mod != 0)
100 sb.append(Modifier.toString(access_mod)).append(' ');
101 if (isDefault)
102 sb.append("default ");
103 mod = (mod & ~Modifier.ACCESS_MODIFIERS);
104 if (mod != 0)
105 sb.append(Modifier.toString(mod)).append(' ');
106 }
107 }
108
109 String sharedToString(int modifierMask,
110 boolean isDefault,
111 Class<?>[] parameterTypes,
112 Class<?>[] exceptionTypes) {
113 try {
114 StringBuilder sb = new StringBuilder();
115
116 printModifiersIfNonzero(sb, modifierMask, isDefault);
117 specificToStringHeader(sb);
118 sb.append(Arrays.stream(parameterTypes)
119 .map(Type::getTypeName)
120 .collect(Collectors.joining(",", "(", ")")));
121 if (exceptionTypes.length > 0) {
122 sb.append(Arrays.stream(exceptionTypes)
123 .map(Type::getTypeName)
124 .collect(Collectors.joining(",", " throws ", "")));
125 }
126 return sb.toString();
127 } catch (Exception e) {
128 return "<" + e + ">";
129 }
130 }
131
132 /**
133 * Generate toString header information specific to a method or
134 * constructor.
135 */
136 abstract void specificToStringHeader(StringBuilder sb);
137
138 static String typeVarBounds(TypeVariable<?> typeVar) {
139 Type[] bounds = typeVar.getBounds();
140 if (bounds.length == 1 && bounds[0].equals(Object.class)) {
141 return typeVar.getName();
142 } else {
143 return typeVar.getName() + " extends " +
144 Arrays.stream(bounds)
145 .map(Type::getTypeName)
146 .collect(Collectors.joining(" & "));
147 }
148 }
149
150 String sharedToGenericString(int modifierMask, boolean isDefault) {
151 try {
152 StringBuilder sb = new StringBuilder();
153
154 printModifiersIfNonzero(sb, modifierMask, isDefault);
155
156 TypeVariable<?>[] typeparms = getTypeParameters();
157 if (typeparms.length > 0) {
158 sb.append(Arrays.stream(typeparms)
159 .map(Executable::typeVarBounds)
160 .collect(Collectors.joining(",", "<", "> ")));
161 }
162
163 specificToGenericStringHeader(sb);
164
165 sb.append('(');
166 StringJoiner sj = new StringJoiner(",");
167 Type[] params = getGenericParameterTypes();
168 for (int j = 0; j < params.length; j++) {
169 String param = params[j].getTypeName();
170 if (isVarArgs() && (j == params.length - 1)) // replace T[] with T...
171 param = param.replaceFirst("\\[\\]$", "...");
172 sj.add(param);
173 }
174 sb.append(sj.toString());
175 sb.append(')');
176
177 Type[] exceptionTypes = getGenericExceptionTypes();
178 if (exceptionTypes.length > 0) {
179 sb.append(Arrays.stream(exceptionTypes)
180 .map(Type::getTypeName)
181 .collect(Collectors.joining(",", " throws ", "")));
182 }
183 return sb.toString();
184 } catch (Exception e) {
185 return "<" + e + ">";
186 }
187 }
188
189 /**
190 * Generate toGenericString header information specific to a
191 * method or constructor.
192 */
193 abstract void specificToGenericStringHeader(StringBuilder sb);
194
195 /**
196 * Returns the {@code Class} object representing the class or interface
197 * that declares the executable represented by this object.
198 */
199 public abstract Class<?> getDeclaringClass();
200
201 /**
202 * Returns the name of the executable represented by this object.
203 */
204 public abstract String getName();
205
206 /**
207 * {@return the Java language {@linkplain Modifier modifiers} for
208 * the executable represented by this object}
209 * @see #accessFlags
210 */
211 public abstract int getModifiers();
212
213 /**
214 * {@return an unmodifiable set of the {@linkplain AccessFlag
215 * access flags} for the executable represented by this object,
216 * possibly empty}
217 * The {@code AccessFlags} may depend on the class file format version of the class.
218 *
219 * @see #getModifiers()
220 * @jvms 4.6 Methods
221 * @since 20
222 */
223 @Override
224 public Set<AccessFlag> accessFlags() {
225 int major = SharedSecrets.getJavaLangAccess().classFileFormatVersion(getDeclaringClass()) & 0xffff;
226 var cffv = ClassFileFormatVersion.fromMajor(major);
227 return AccessFlag.maskToAccessFlags(getModifiers(),
228 AccessFlag.Location.METHOD,
229 cffv);
230 }
231
232 /**
233 * Returns an array of {@code TypeVariable} objects that represent the
234 * type variables declared by the generic declaration represented by this
235 * {@code GenericDeclaration} object, in declaration order. Returns an
236 * array of length 0 if the underlying generic declaration declares no type
237 * variables.
238 *
239 * @return an array of {@code TypeVariable} objects that represent
240 * the type variables declared by this generic declaration
241 * @throws GenericSignatureFormatError if the generic
242 * signature of this generic declaration does not conform to
243 * the format specified in
244 * <cite>The Java Virtual Machine Specification</cite>
245 */
246 public abstract TypeVariable<?>[] getTypeParameters();
247
248 // returns shared array of parameter types - must never give it out
249 // to the untrusted code...
250 abstract Class<?>[] getSharedParameterTypes();
251
252 // returns shared array of exception types - must never give it out
253 // to the untrusted code...
254 abstract Class<?>[] getSharedExceptionTypes();
255
256 /**
257 * Returns an array of {@code Class} objects that represent the formal
258 * parameter types, in declaration order, of the executable
259 * represented by this object. Returns an array of length
260 * 0 if the underlying executable takes no parameters.
261 * Note that the constructors of some inner classes
262 * may have an implicitly declared parameter in addition to
263 * explicitly declared ones.
264 *
265 * @return the parameter types for the executable this object
266 * represents
267 */
268 public abstract Class<?>[] getParameterTypes();
269
270 /**
271 * Returns the number of formal parameters (whether explicitly
272 * declared or implicitly declared or neither) for the executable
273 * represented by this object.
274 *
275 * @return The number of formal parameters for the executable this
276 * object represents
277 */
278 public abstract int getParameterCount();
279
280 /**
281 * Returns an array of {@code Type} objects that represent the
282 * formal parameter types, in declaration order, of the executable
283 * represented by this object. An array of length 0 is returned if the
284 * underlying executable takes no parameters. Note that the
285 * constructors of some inner classes may have an implicitly
286 * declared parameter in addition to explicitly declared ones.
287 * Also note that as a <a
288 * href="{@docRoot}/java.base/java/lang/reflect/package-summary.html#LanguageJvmModel">modeling
289 * artifact</a>, the number of returned parameters can differ
290 * depending on whether or not generic information is present. If
291 * generic information is present, only parameters explicitly
292 * present in the source will be returned; if generic information
293 * is not present, implicit and synthetic parameters may be
294 * returned as well.
295 *
296 * <p>If a formal parameter type is a parameterized type,
297 * the {@code Type} object returned for it must accurately reflect
298 * the actual type arguments used in the source code.
299 *
300 * <p>If a formal parameter type is a type variable or a parameterized
301 * type, it is created. Otherwise, it is resolved.
302 *
303 * @return an array of {@code Type}s that represent the formal
304 * parameter types of the underlying executable, in declaration order
305 * @throws GenericSignatureFormatError
306 * if the generic method signature does not conform to the format
307 * specified in
308 * <cite>The Java Virtual Machine Specification</cite>
309 * @throws TypeNotPresentException if any of the parameter
310 * types of the underlying executable refers to a non-existent type
311 * declaration
312 * @throws MalformedParameterizedTypeException if any of
313 * the underlying executable's parameter types refer to a parameterized
314 * type that cannot be instantiated for any reason
315 */
316 public Type[] getGenericParameterTypes() {
317 if (hasGenericInformation())
318 return getGenericInfo().getParameterTypes();
319 else
320 return getParameterTypes();
321 }
322
323 /**
324 * Behaves like {@code getGenericParameterTypes}, but returns type
325 * information for all parameters, including synthetic parameters.
326 */
327 Type[] getAllGenericParameterTypes() {
328 final boolean genericInfo = hasGenericInformation();
329
330 // Easy case: we don't have generic parameter information. In
331 // this case, we just return the result of
332 // getParameterTypes().
333 if (!genericInfo) {
334 return getParameterTypes();
335 } else {
336 final boolean realParamData = hasRealParameterData();
337 final Type[] genericParamTypes = getGenericParameterTypes();
338 final Type[] nonGenericParamTypes = getSharedParameterTypes();
339 // If we have real parameter data, then we use the
340 // synthetic and mandate flags to our advantage.
341 if (realParamData) {
342 final Type[] out = new Type[nonGenericParamTypes.length];
343 final Parameter[] params = getParameters();
344 int fromidx = 0;
345 for (int i = 0; i < out.length; i++) {
346 final Parameter param = params[i];
347 if (param.isSynthetic() || param.isImplicit()) {
348 // If we hit a synthetic or mandated parameter,
349 // use the non generic parameter info.
350 out[i] = nonGenericParamTypes[i];
351 } else {
352 // Otherwise, use the generic parameter info.
353 out[i] = genericParamTypes[fromidx];
354 fromidx++;
355 }
356 }
357 return out;
358 } else {
359 // Otherwise, use the non-generic parameter data.
360 // Without method parameter reflection data, we have
361 // no way to figure out which parameters are
362 // synthetic/mandated, thus, no way to match up the
363 // indexes.
364 return genericParamTypes.length == nonGenericParamTypes.length ?
365 genericParamTypes : getParameterTypes();
366 }
367 }
368 }
369
370 /**
371 * {@return an array of {@code Parameter} objects representing
372 * all the parameters to the underlying executable represented by
373 * this object} An array of length 0 is returned if the executable
374 * has no parameters.
375 *
376 * <p>The parameters of the underlying executable do not necessarily
377 * have unique names, or names that are legal identifiers in the
378 * Java programming language (JLS {@jls 3.8}).
379 *
380 * @throws MalformedParametersException if the class file contains
381 * a MethodParameters attribute that is improperly formatted.
382 */
383 public Parameter[] getParameters() {
384 // TODO: This may eventually need to be guarded by security
385 // mechanisms similar to those in Field, Method, etc.
386 //
387 // Need to copy the cached array to prevent users from messing
388 // with it. Since parameters are immutable, we can
389 // shallow-copy.
390 return parameterData().parameters.clone();
391 }
392
393 private Parameter[] synthesizeAllParams() {
394 final int realparams = getParameterCount();
395 final Parameter[] out = new Parameter[realparams];
396 for (int i = 0; i < realparams; i++)
397 // TODO: is there a way to synthetically derive the
398 // modifiers? Probably not in the general case, since
399 // we'd have no way of knowing about them, but there
400 // may be specific cases.
401 out[i] = new Parameter("arg" + i, 0, this, i);
402 return out;
403 }
404
405 private void verifyParameters(final Parameter[] parameters) {
406 final int mask = Modifier.FINAL | Modifier.SYNTHETIC | Modifier.MANDATED;
407
408 if (getParameterCount() != parameters.length)
409 throw new MalformedParametersException("Wrong number of parameters in MethodParameters attribute");
410
411 for (Parameter parameter : parameters) {
412 final String name = parameter.getRealName();
413 final int mods = parameter.getModifiers();
414
415 if (name != null) {
416 if (name.isEmpty() || name.indexOf('.') != -1 ||
417 name.indexOf(';') != -1 || name.indexOf('[') != -1 ||
418 name.indexOf('/') != -1) {
419 throw new MalformedParametersException("Invalid parameter name \"" + name + "\"");
420 }
421 }
422
423 if (mods != (mods & mask)) {
424 throw new MalformedParametersException("Invalid parameter modifiers");
425 }
426 }
427 }
428
429
430 boolean hasRealParameterData() {
431 return parameterData().isReal;
432 }
433
434 private ParameterData parameterData() {
435 ParameterData parameterData = this.parameterData;
436 if (parameterData != null) {
437 return parameterData;
438 }
439
440 Parameter[] tmp;
441 // Go to the JVM to get them
442 try {
443 tmp = getParameters0();
444 } catch (IllegalArgumentException e) {
445 // Rethrow ClassFormatErrors
446 throw new MalformedParametersException("Invalid constant pool index");
447 }
448
449 // If we get back nothing, then synthesize parameters
450 if (tmp == null) {
451 tmp = synthesizeAllParams();
452 parameterData = new ParameterData(tmp, false);
453 } else {
454 verifyParameters(tmp);
455 parameterData = new ParameterData(tmp, true);
456 }
457 return this.parameterData = parameterData;
458 }
459
460 private transient @Stable ParameterData parameterData;
461
462 record ParameterData(@Stable Parameter[] parameters, boolean isReal) {}
463
464 private native Parameter[] getParameters0();
465 native byte[] getTypeAnnotationBytes0();
466
467 // Needed by reflectaccess
468 byte[] getTypeAnnotationBytes() {
469 return getTypeAnnotationBytes0();
470 }
471
472 /**
473 * Returns an array of {@code Class} objects that represent the
474 * types of exceptions declared to be thrown by the underlying
475 * executable represented by this object. Returns an array of
476 * length 0 if the executable declares no exceptions in its {@code
477 * throws} clause.
478 *
479 * @return the exception types declared as being thrown by the
480 * executable this object represents
481 */
482 public abstract Class<?>[] getExceptionTypes();
483
484 /**
485 * Returns an array of {@code Type} objects that represent the
486 * exceptions declared to be thrown by this executable object.
487 * Returns an array of length 0 if the underlying executable declares
488 * no exceptions in its {@code throws} clause.
489 *
490 * <p>If an exception type is a type variable or a parameterized
491 * type, it is created. Otherwise, it is resolved.
492 *
493 * @return an array of Types that represent the exception types
494 * thrown by the underlying executable
495 * @throws GenericSignatureFormatError
496 * if the generic method signature does not conform to the format
497 * specified in
498 * <cite>The Java Virtual Machine Specification</cite>
499 * @throws TypeNotPresentException if the underlying executable's
500 * {@code throws} clause refers to a non-existent type declaration
501 * @throws MalformedParameterizedTypeException if
502 * the underlying executable's {@code throws} clause refers to a
503 * parameterized type that cannot be instantiated for any reason
504 */
505 public Type[] getGenericExceptionTypes() {
506 Type[] result;
507 if (hasGenericInformation() &&
508 ((result = getGenericInfo().getExceptionTypes()).length > 0))
509 return result;
510 else
511 return getExceptionTypes();
512 }
513
514 /**
515 * {@return a string describing this {@code Executable}, including
516 * any type parameters}
517 */
518 public abstract String toGenericString();
519
520 /**
521 * {@return {@code true} if this executable was declared to take a
522 * variable number of arguments; returns {@code false} otherwise}
523 */
524 public boolean isVarArgs() {
525 return (getModifiers() & Modifier.VARARGS) != 0;
526 }
527
528 /**
529 * Returns {@code true} if this executable is a synthetic
530 * construct; returns {@code false} otherwise.
531 *
532 * @return true if and only if this executable is a synthetic
533 * construct as defined by
534 * <cite>The Java Language Specification</cite>.
535 * @jls 13.1 The Form of a Binary
536 * @jvms 4.6 Methods
537 */
538 public boolean isSynthetic() {
539 return Modifier.isSynthetic(getModifiers());
540 }
541
542 /**
543 * Returns an array of arrays of {@code Annotation}s that
544 * represent the annotations on the formal parameters, in
545 * declaration order, of the {@code Executable} represented by
546 * this object. Synthetic and mandated parameters (see
547 * explanation below), such as the outer "this" parameter to an
548 * inner class constructor will be represented in the returned
549 * array. If the executable has no parameters (meaning no formal,
550 * no synthetic, and no mandated parameters), a zero-length array
551 * will be returned. If the {@code Executable} has one or more
552 * parameters, a nested array of length zero is returned for each
553 * parameter with no annotations. The annotation objects contained
554 * in the returned arrays are serializable. The caller of this
555 * method is free to modify the returned arrays; it will have no
556 * effect on the arrays returned to other callers.
557 *
558 * A compiler may add extra parameters that are implicitly
559 * declared in source ("mandated"), as well as parameters that
560 * are neither implicitly nor explicitly declared in source
561 * ("synthetic") to the parameter list for a method. See {@link
562 * java.lang.reflect.Parameter} for more information.
563 *
564 * <p>Note that any annotations returned by this method are
565 * declaration annotations.
566 *
567 * @see java.lang.reflect.Parameter
568 * @see java.lang.reflect.Parameter#getAnnotations
569 * @return an array of arrays that represent the annotations on
570 * the formal and implicit parameters, in declaration order, of
571 * the executable represented by this object
572 */
573 public abstract Annotation[][] getParameterAnnotations();
574
575 Annotation[][] sharedGetParameterAnnotations(Class<?>[] parameterTypes,
576 byte[] parameterAnnotations) {
577 int numParameters = parameterTypes.length;
578 if (parameterAnnotations == null)
579 return new Annotation[numParameters][0];
580
581 Annotation[][] result = parseParameterAnnotations(parameterAnnotations);
582
583 if (result.length != numParameters &&
584 handleParameterNumberMismatch(result.length, parameterTypes)) {
585 Annotation[][] tmp = new Annotation[numParameters][];
586 // Shift annotations down to account for any implicit leading parameters
587 System.arraycopy(result, 0, tmp, numParameters - result.length, result.length);
588 for (int i = 0; i < numParameters - result.length; i++) {
589 tmp[i] = new Annotation[0];
590 }
591 result = tmp;
592 }
593 return result;
594 }
595
596 abstract boolean handleParameterNumberMismatch(int resultLength, Class<?>[] parameterTypes);
597
598 /**
599 * {@inheritDoc}
600 * @throws NullPointerException {@inheritDoc}
601 */
602 @Override
603 public <T extends Annotation> T getAnnotation(Class<T> annotationClass) {
604 Objects.requireNonNull(annotationClass);
605 return annotationClass.cast(declaredAnnotations().get(annotationClass));
606 }
607
608 /**
609 * {@inheritDoc}
610 *
611 * @throws NullPointerException {@inheritDoc}
612 */
613 @Override
614 public <T extends Annotation> T[] getAnnotationsByType(Class<T> annotationClass) {
615 Objects.requireNonNull(annotationClass);
616
617 return AnnotationSupport.getDirectlyAndIndirectlyPresent(declaredAnnotations(), annotationClass);
618 }
619
620 /**
621 * {@inheritDoc}
622 */
623 @Override
624 public Annotation[] getDeclaredAnnotations() {
625 return AnnotationParser.toArray(declaredAnnotations());
626 }
627
628 private transient volatile Map<Class<? extends Annotation>, Annotation> declaredAnnotations;
629
630 private Map<Class<? extends Annotation>, Annotation> declaredAnnotations() {
631 Map<Class<? extends Annotation>, Annotation> declAnnos;
632 if ((declAnnos = declaredAnnotations) == null) {
633 synchronized (this) {
634 if ((declAnnos = declaredAnnotations) == null) {
635 Executable root = (Executable)getRoot();
636 if (root != null) {
637 declAnnos = root.declaredAnnotations();
638 } else {
639 declAnnos = AnnotationParser.parseAnnotations(
640 getAnnotationBytes(),
641 SharedSecrets.getJavaLangAccess().
642 getConstantPool(getDeclaringClass()),
643 getDeclaringClass()
644 );
645 }
646 declaredAnnotations = declAnnos;
647 }
648 }
649 }
650 return declAnnos;
651 }
652
653 /**
654 * Returns an {@code AnnotatedType} object that represents the use of a type to
655 * specify the return type of the method/constructor represented by this
656 * Executable.
657 *
658 * If this {@code Executable} object represents a constructor, the {@code
659 * AnnotatedType} object represents the type of the constructed object.
660 *
661 * If this {@code Executable} object represents a method, the {@code
662 * AnnotatedType} object represents the use of a type to specify the return
663 * type of the method.
664 *
665 * @return an object representing the return type of the method
666 * or constructor represented by this {@code Executable}
667 */
668 public abstract AnnotatedType getAnnotatedReturnType();
669
670 /* Helper for subclasses of Executable.
671 *
672 * Returns an AnnotatedType object that represents the use of a type to
673 * specify the return type of the method/constructor represented by this
674 * Executable.
675 */
676 AnnotatedType getAnnotatedReturnType0(Type returnType) {
677 return TypeAnnotationParser.buildAnnotatedType(getTypeAnnotationBytes0(),
678 SharedSecrets.getJavaLangAccess().
679 getConstantPool(getDeclaringClass()),
680 this,
681 getDeclaringClass(),
682 returnType,
683 TypeAnnotation.TypeAnnotationTarget.METHOD_RETURN);
684 }
685
686 /**
687 * Returns an {@code AnnotatedType} object that represents the use of a
688 * type to specify the receiver type of the method/constructor represented
689 * by this {@code Executable} object.
690 *
691 * The receiver type of a method/constructor is available only if the
692 * method/constructor has a receiver parameter (JLS {@jls 8.4.1}). If this {@code
693 * Executable} object <em>represents an instance method or represents a
694 * constructor of an inner member class</em>, and the
695 * method/constructor <em>either</em> has no receiver parameter or has a
696 * receiver parameter with no annotations on its type, then the return
697 * value is an {@code AnnotatedType} object representing an element with no
698 * annotations.
699 *
700 * If this {@code Executable} object represents a static method or
701 * represents a constructor of a top level, static member, local, or
702 * anonymous class, then the return value is null.
703 *
704 * @return an object representing the receiver type of the method or
705 * constructor represented by this {@code Executable} or {@code null} if
706 * this {@code Executable} can not have a receiver parameter
707 *
708 * @jls 8.4 Method Declarations
709 * @jls 8.4.1 Formal Parameters
710 * @jls 8.8 Constructor Declarations
711 */
712 public AnnotatedType getAnnotatedReceiverType() {
713 if (Modifier.isStatic(this.getModifiers()))
714 return null;
715 return TypeAnnotationParser.buildAnnotatedType(getTypeAnnotationBytes0(),
716 SharedSecrets.getJavaLangAccess().
717 getConstantPool(getDeclaringClass()),
718 this,
719 getDeclaringClass(),
720 parameterize(getDeclaringClass()),
721 TypeAnnotation.TypeAnnotationTarget.METHOD_RECEIVER);
722 }
723
724 Type parameterize(Class<?> c) {
725 Class<?> ownerClass = c.getDeclaringClass();
726 TypeVariable<?>[] typeVars = c.getTypeParameters();
727
728 // base case, static nested classes, according to JLS 8.1.3, has no
729 // enclosing instance, therefore its owner is not generified.
730 if (ownerClass == null || Modifier.isStatic(c.getModifiers())) {
731 if (typeVars.length == 0)
732 return c;
733 else
734 return ParameterizedTypeImpl.make(c, typeVars, null);
735 }
736
737 // Resolve owner
738 Type ownerType = parameterize(ownerClass);
739 if (ownerType instanceof Class<?> && typeVars.length == 0) // We have yet to encounter type parameters
740 return c;
741 else
742 return ParameterizedTypeImpl.make(c, typeVars, ownerType);
743 }
744
745 /**
746 * Returns an array of {@code AnnotatedType} objects that represent the use
747 * of types to specify formal parameter types of the method/constructor
748 * represented by this Executable. The order of the objects in the array
749 * corresponds to the order of the formal parameter types in the
750 * declaration of the method/constructor.
751 *
752 * Returns an array of length 0 if the method/constructor declares no
753 * parameters.
754 * Note that the constructors of some inner classes
755 * may have an implicitly declared parameter in addition to
756 * explicitly declared ones.
757 *
758 * @return an array of objects representing the types of the
759 * formal parameters of the method or constructor represented by this
760 * {@code Executable}
761 */
762 public AnnotatedType[] getAnnotatedParameterTypes() {
763 return TypeAnnotationParser.buildAnnotatedTypes(getTypeAnnotationBytes0(),
764 SharedSecrets.getJavaLangAccess().
765 getConstantPool(getDeclaringClass()),
766 this,
767 getDeclaringClass(),
768 getAllGenericParameterTypes(),
769 TypeAnnotation.TypeAnnotationTarget.METHOD_FORMAL_PARAMETER);
770 }
771
772 /**
773 * Returns an array of {@code AnnotatedType} objects that represent the use
774 * of types to specify the declared exceptions of the method/constructor
775 * represented by this Executable. The order of the objects in the array
776 * corresponds to the order of the exception types in the declaration of
777 * the method/constructor.
778 *
779 * Returns an array of length 0 if the method/constructor declares no
780 * exceptions.
781 *
782 * @return an array of objects representing the declared
783 * exceptions of the method or constructor represented by this {@code
784 * Executable}
785 */
786 public AnnotatedType[] getAnnotatedExceptionTypes() {
787 return TypeAnnotationParser.buildAnnotatedTypes(getTypeAnnotationBytes0(),
788 SharedSecrets.getJavaLangAccess().
789 getConstantPool(getDeclaringClass()),
790 this,
791 getDeclaringClass(),
792 getGenericExceptionTypes(),
793 TypeAnnotation.TypeAnnotationTarget.THROWS);
794 }
795
796 String getDeclaringClassTypeName() {
797 Class<?> c = getDeclaringClass();
798 if (PrimitiveClass.isPrimitiveClass(c)) {
799 c = PrimitiveClass.asValueType(c);
800 }
801 return c.getTypeName();
802 }
803 }