Annotate.java revision 4195:cfc4a56c86f9
1/* 2 * Copyright (c) 2003, 2017, 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 26package com.sun.tools.javac.comp; 27 28import com.sun.tools.javac.code.*; 29import com.sun.tools.javac.code.Attribute.Compound; 30import com.sun.tools.javac.code.Attribute.TypeCompound; 31import com.sun.tools.javac.code.Scope.WriteableScope; 32import com.sun.tools.javac.code.Symbol.*; 33import com.sun.tools.javac.code.TypeMetadata.Entry.Kind; 34import com.sun.tools.javac.resources.CompilerProperties.Errors; 35import com.sun.tools.javac.tree.JCTree; 36import com.sun.tools.javac.tree.JCTree.*; 37import com.sun.tools.javac.tree.TreeInfo; 38import com.sun.tools.javac.tree.TreeMaker; 39import com.sun.tools.javac.tree.TreeScanner; 40import com.sun.tools.javac.util.*; 41import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition; 42import com.sun.tools.javac.util.List; 43 44import javax.tools.JavaFileObject; 45 46import java.util.*; 47 48import static com.sun.tools.javac.code.Flags.SYNTHETIC; 49import static com.sun.tools.javac.code.Kinds.Kind.MDL; 50import static com.sun.tools.javac.code.Kinds.Kind.MTH; 51import static com.sun.tools.javac.code.Kinds.Kind.PCK; 52import static com.sun.tools.javac.code.Kinds.Kind.VAR; 53import static com.sun.tools.javac.code.Scope.LookupKind.NON_RECURSIVE; 54import static com.sun.tools.javac.code.TypeTag.ARRAY; 55import static com.sun.tools.javac.code.TypeTag.CLASS; 56import static com.sun.tools.javac.tree.JCTree.Tag.ANNOTATION; 57import static com.sun.tools.javac.tree.JCTree.Tag.ASSIGN; 58import static com.sun.tools.javac.tree.JCTree.Tag.IDENT; 59import static com.sun.tools.javac.tree.JCTree.Tag.NEWARRAY; 60 61import com.sun.tools.javac.util.JCDiagnostic.DiagnosticFlag; 62 63 64/** Enter annotations onto symbols and types (and trees). 65 * 66 * This is also a pseudo stage in the compiler taking care of scheduling when annotations are 67 * entered. 68 * 69 * <p><b>This is NOT part of any supported API. 70 * If you write code that depends on this, you do so at your own risk. 71 * This code and its internal interfaces are subject to change or 72 * deletion without notice.</b> 73 */ 74public class Annotate { 75 protected static final Context.Key<Annotate> annotateKey = new Context.Key<>(); 76 77 public static Annotate instance(Context context) { 78 Annotate instance = context.get(annotateKey); 79 if (instance == null) 80 instance = new Annotate(context); 81 return instance; 82 } 83 84 private final Attr attr; 85 private final Check chk; 86 private final ConstFold cfolder; 87 private final DeferredLintHandler deferredLintHandler; 88 private final Enter enter; 89 private final Lint lint; 90 private final Log log; 91 private final Names names; 92 private final Resolve resolve; 93 private final TreeMaker make; 94 private final Symtab syms; 95 private final TypeEnvs typeEnvs; 96 private final Types types; 97 98 private final Attribute theUnfinishedDefaultValue; 99 private final boolean allowRepeatedAnnos; 100 private final String sourceName; 101 102 protected Annotate(Context context) { 103 context.put(annotateKey, this); 104 105 attr = Attr.instance(context); 106 chk = Check.instance(context); 107 cfolder = ConstFold.instance(context); 108 deferredLintHandler = DeferredLintHandler.instance(context); 109 enter = Enter.instance(context); 110 log = Log.instance(context); 111 lint = Lint.instance(context); 112 make = TreeMaker.instance(context); 113 names = Names.instance(context); 114 resolve = Resolve.instance(context); 115 syms = Symtab.instance(context); 116 typeEnvs = TypeEnvs.instance(context); 117 types = Types.instance(context); 118 119 theUnfinishedDefaultValue = new Attribute.Error(syms.errType); 120 121 Source source = Source.instance(context); 122 allowRepeatedAnnos = source.allowRepeatedAnnotations(); 123 sourceName = source.name; 124 125 blockCount = 1; 126 } 127 128 /** Semaphore to delay annotation processing */ 129 private int blockCount = 0; 130 131 /** Called when annotations processing needs to be postponed. */ 132 public void blockAnnotations() { 133 blockCount++; 134 } 135 136 /** Called when annotation processing can be resumed. */ 137 public void unblockAnnotations() { 138 blockCount--; 139 if (blockCount == 0) 140 flush(); 141 } 142 143 /** Variant which allows for a delayed flush of annotations. 144 * Needed by ClassReader */ 145 public void unblockAnnotationsNoFlush() { 146 blockCount--; 147 } 148 149 /** are we blocking annotation processing? */ 150 public boolean annotationsBlocked() {return blockCount > 0; } 151 152 public void enterDone() { 153 unblockAnnotations(); 154 } 155 156 public List<TypeCompound> fromAnnotations(List<JCAnnotation> annotations) { 157 if (annotations.isEmpty()) { 158 return List.nil(); 159 } 160 161 ListBuffer<TypeCompound> buf = new ListBuffer<>(); 162 for (JCAnnotation anno : annotations) { 163 Assert.checkNonNull(anno.attribute); 164 buf.append((TypeCompound) anno.attribute); 165 } 166 return buf.toList(); 167 } 168 169 /** Annotate (used for everything else) */ 170 public void normal(Runnable r) { 171 q.append(r); 172 } 173 174 /** Validate, triggers after 'normal' */ 175 public void validate(Runnable a) { 176 validateQ.append(a); 177 } 178 179 /** Flush all annotation queues */ 180 public void flush() { 181 if (annotationsBlocked()) return; 182 if (isFlushing()) return; 183 184 startFlushing(); 185 try { 186 while (q.nonEmpty()) { 187 q.next().run(); 188 } 189 while (typesQ.nonEmpty()) { 190 typesQ.next().run(); 191 } 192 while (afterTypesQ.nonEmpty()) { 193 afterTypesQ.next().run(); 194 } 195 while (validateQ.nonEmpty()) { 196 validateQ.next().run(); 197 } 198 } finally { 199 doneFlushing(); 200 } 201 } 202 203 private ListBuffer<Runnable> q = new ListBuffer<>(); 204 private ListBuffer<Runnable> validateQ = new ListBuffer<>(); 205 206 private int flushCount = 0; 207 private boolean isFlushing() { return flushCount > 0; } 208 private void startFlushing() { flushCount++; } 209 private void doneFlushing() { flushCount--; } 210 211 ListBuffer<Runnable> typesQ = new ListBuffer<>(); 212 ListBuffer<Runnable> afterTypesQ = new ListBuffer<>(); 213 214 215 public void typeAnnotation(Runnable a) { 216 typesQ.append(a); 217 } 218 219 public void afterTypes(Runnable a) { 220 afterTypesQ.append(a); 221 } 222 223 /** 224 * Queue annotations for later attribution and entering. This is probably the method you are looking for. 225 * 226 * @param annotations the list of JCAnnotations to attribute and enter 227 * @param localEnv the enclosing env 228 * @param s ths Symbol on which to enter the annotations 229 * @param deferPos report errors here 230 */ 231 public void annotateLater(List<JCAnnotation> annotations, Env<AttrContext> localEnv, 232 Symbol s, DiagnosticPosition deferPos) 233 { 234 if (annotations.isEmpty()) { 235 return; 236 } 237 238 s.resetAnnotations(); // mark Annotations as incomplete for now 239 240 normal(() -> { 241 // Packages are unusual, in that they are the only type of declaration that can legally appear 242 // more than once in a compilation, and in all cases refer to the same underlying symbol. 243 // This means they are the only kind of declaration that syntactically may have multiple sets 244 // of annotations, each on a different package declaration, even though that is ultimately 245 // forbidden by JLS 8 section 7.4. 246 // The corollary here is that all of the annotations on a package symbol may have already 247 // been handled, meaning that the set of annotations pending completion is now empty. 248 Assert.check(s.kind == PCK || s.annotationsPendingCompletion()); 249 JavaFileObject prev = log.useSource(localEnv.toplevel.sourcefile); 250 DiagnosticPosition prevLintPos = 251 deferPos != null 252 ? deferredLintHandler.setPos(deferPos) 253 : deferredLintHandler.immediate(); 254 Lint prevLint = deferPos != null ? null : chk.setLint(lint); 255 try { 256 if (s.hasAnnotations() && annotations.nonEmpty()) 257 log.error(annotations.head.pos, "already.annotated", Kinds.kindName(s), s); 258 259 Assert.checkNonNull(s, "Symbol argument to actualEnterAnnotations is null"); 260 261 // false is passed as fifth parameter since annotateLater is 262 // never called for a type parameter 263 annotateNow(s, annotations, localEnv, false, false); 264 } finally { 265 if (prevLint != null) 266 chk.setLint(prevLint); 267 deferredLintHandler.setPos(prevLintPos); 268 log.useSource(prev); 269 } 270 }); 271 272 validate(() -> { //validate annotations 273 JavaFileObject prev = log.useSource(localEnv.toplevel.sourcefile); 274 try { 275 chk.validateAnnotations(annotations, s); 276 } finally { 277 log.useSource(prev); 278 } 279 }); 280 } 281 282 283 /** Queue processing of an attribute default value. */ 284 public void annotateDefaultValueLater(JCExpression defaultValue, Env<AttrContext> localEnv, 285 MethodSymbol m, DiagnosticPosition deferPos) 286 { 287 normal(() -> { 288 JavaFileObject prev = log.useSource(localEnv.toplevel.sourcefile); 289 DiagnosticPosition prevLintPos = deferredLintHandler.setPos(deferPos); 290 try { 291 enterDefaultValue(defaultValue, localEnv, m); 292 } finally { 293 deferredLintHandler.setPos(prevLintPos); 294 log.useSource(prev); 295 } 296 }); 297 298 validate(() -> { //validate annotations 299 JavaFileObject prev = log.useSource(localEnv.toplevel.sourcefile); 300 try { 301 // if default value is an annotation, check it is a well-formed 302 // annotation value (e.g. no duplicate values, no missing values, etc.) 303 chk.validateAnnotationTree(defaultValue); 304 } finally { 305 log.useSource(prev); 306 } 307 }); 308 } 309 310 /** Enter a default value for an annotation element. */ 311 private void enterDefaultValue(JCExpression defaultValue, 312 Env<AttrContext> localEnv, MethodSymbol m) { 313 m.defaultValue = attributeAnnotationValue(m.type.getReturnType(), defaultValue, localEnv); 314 } 315 316 /** 317 * Gather up annotations into a map from type symbols to lists of Compound attributes, 318 * then continue on with repeating annotations processing. 319 */ 320 private <T extends Attribute.Compound> void annotateNow(Symbol toAnnotate, 321 List<JCAnnotation> withAnnotations, Env<AttrContext> env, boolean typeAnnotations, 322 boolean isTypeParam) 323 { 324 Map<TypeSymbol, ListBuffer<T>> annotated = new LinkedHashMap<>(); 325 Map<T, DiagnosticPosition> pos = new HashMap<>(); 326 327 for (List<JCAnnotation> al = withAnnotations; !al.isEmpty(); al = al.tail) { 328 JCAnnotation a = al.head; 329 330 T c; 331 if (typeAnnotations) { 332 @SuppressWarnings("unchecked") 333 T tmp = (T)attributeTypeAnnotation(a, syms.annotationType, env); 334 c = tmp; 335 } else { 336 @SuppressWarnings("unchecked") 337 T tmp = (T)attributeAnnotation(a, syms.annotationType, env); 338 c = tmp; 339 } 340 341 Assert.checkNonNull(c, "Failed to create annotation"); 342 343 if (annotated.containsKey(a.type.tsym)) { 344 if (!allowRepeatedAnnos) { 345 log.error(DiagnosticFlag.SOURCE_LEVEL, a.pos(), "repeatable.annotations.not.supported.in.source", sourceName); 346 } 347 ListBuffer<T> l = annotated.get(a.type.tsym); 348 l = l.append(c); 349 annotated.put(a.type.tsym, l); 350 pos.put(c, a.pos()); 351 } else { 352 annotated.put(a.type.tsym, ListBuffer.of(c)); 353 pos.put(c, a.pos()); 354 } 355 356 // Note: @Deprecated has no effect on local variables and parameters 357 if (!c.type.isErroneous() 358 && (toAnnotate.kind == MDL || toAnnotate.owner.kind != MTH) 359 && types.isSameType(c.type, syms.deprecatedType)) { 360 toAnnotate.flags_field |= (Flags.DEPRECATED | Flags.DEPRECATED_ANNOTATION); 361 Attribute fr = c.member(names.forRemoval); 362 if (fr instanceof Attribute.Constant) { 363 Attribute.Constant v = (Attribute.Constant) fr; 364 if (v.type == syms.booleanType && ((Integer) v.value) != 0) { 365 toAnnotate.flags_field |= Flags.DEPRECATED_REMOVAL; 366 } 367 } 368 } 369 } 370 371 List<T> buf = List.nil(); 372 for (ListBuffer<T> lb : annotated.values()) { 373 if (lb.size() == 1) { 374 buf = buf.prepend(lb.first()); 375 } else { 376 AnnotationContext<T> ctx = new AnnotationContext<>(env, annotated, pos, typeAnnotations); 377 T res = makeContainerAnnotation(lb.toList(), ctx, toAnnotate, isTypeParam); 378 if (res != null) 379 buf = buf.prepend(res); 380 } 381 } 382 383 if (typeAnnotations) { 384 @SuppressWarnings("unchecked") 385 List<TypeCompound> attrs = (List<TypeCompound>)buf.reverse(); 386 toAnnotate.appendUniqueTypeAttributes(attrs); 387 } else { 388 @SuppressWarnings("unchecked") 389 List<Attribute.Compound> attrs = (List<Attribute.Compound>)buf.reverse(); 390 toAnnotate.resetAnnotations(); 391 toAnnotate.setDeclarationAttributes(attrs); 392 } 393 } 394 395 /** 396 * Attribute and store a semantic representation of the annotation tree {@code tree} into the 397 * tree.attribute field. 398 * 399 * @param tree the tree representing an annotation 400 * @param expectedAnnotationType the expected (super)type of the annotation 401 * @param env the current env in where the annotation instance is found 402 */ 403 public Attribute.Compound attributeAnnotation(JCAnnotation tree, Type expectedAnnotationType, 404 Env<AttrContext> env) 405 { 406 // The attribute might have been entered if it is Target or Repetable 407 // Because TreeCopier does not copy type, redo this if type is null 408 if (tree.attribute != null && tree.type != null) 409 return tree.attribute; 410 411 List<Pair<MethodSymbol, Attribute>> elems = attributeAnnotationValues(tree, expectedAnnotationType, env); 412 Attribute.Compound ac = new Attribute.Compound(tree.type, elems); 413 414 return tree.attribute = ac; 415 } 416 417 /** Attribute and store a semantic representation of the type annotation tree {@code tree} into 418 * the tree.attribute field. 419 * 420 * @param a the tree representing an annotation 421 * @param expectedAnnotationType the expected (super)type of the annotation 422 * @param env the the current env in where the annotation instance is found 423 */ 424 public Attribute.TypeCompound attributeTypeAnnotation(JCAnnotation a, Type expectedAnnotationType, 425 Env<AttrContext> env) 426 { 427 // The attribute might have been entered if it is Target or Repetable 428 // Because TreeCopier does not copy type, redo this if type is null 429 if (a.attribute == null || a.type == null || !(a.attribute instanceof Attribute.TypeCompound)) { 430 // Create a new TypeCompound 431 List<Pair<MethodSymbol,Attribute>> elems = 432 attributeAnnotationValues(a, expectedAnnotationType, env); 433 434 Attribute.TypeCompound tc = 435 new Attribute.TypeCompound(a.type, elems, TypeAnnotationPosition.unknown); 436 a.attribute = tc; 437 return tc; 438 } else { 439 // Use an existing TypeCompound 440 return (Attribute.TypeCompound)a.attribute; 441 } 442 } 443 444 /** 445 * Attribute annotation elements creating a list of pairs of the Symbol representing that 446 * element and the value of that element as an Attribute. */ 447 private List<Pair<MethodSymbol, Attribute>> attributeAnnotationValues(JCAnnotation a, 448 Type expected, Env<AttrContext> env) 449 { 450 // The annotation might have had its type attributed (but not 451 // checked) by attr.attribAnnotationTypes during MemberEnter, 452 // in which case we do not need to do it again. 453 Type at = (a.annotationType.type != null ? 454 a.annotationType.type : attr.attribType(a.annotationType, env)); 455 a.type = chk.checkType(a.annotationType.pos(), at, expected); 456 457 boolean isError = a.type.isErroneous(); 458 if (!a.type.tsym.isAnnotationType() && !isError) { 459 log.error(a.annotationType.pos(), 460 "not.annotation.type", a.type.toString()); 461 isError = true; 462 } 463 464 // List of name=value pairs (or implicit "value=" if size 1) 465 List<JCExpression> args = a.args; 466 467 boolean elidedValue = false; 468 // special case: elided "value=" assumed 469 if (args.length() == 1 && !args.head.hasTag(ASSIGN)) { 470 args.head = make.at(args.head.pos). 471 Assign(make.Ident(names.value), args.head); 472 elidedValue = true; 473 } 474 475 ListBuffer<Pair<MethodSymbol,Attribute>> buf = new ListBuffer<>(); 476 for (List<JCExpression> tl = args; tl.nonEmpty(); tl = tl.tail) { 477 Pair<MethodSymbol, Attribute> p = attributeAnnotationNameValuePair(tl.head, a.type, isError, env, elidedValue); 478 if (p != null && !p.fst.type.isErroneous()) 479 buf.append(p); 480 } 481 return buf.toList(); 482 } 483 484 // where 485 private Pair<MethodSymbol, Attribute> attributeAnnotationNameValuePair(JCExpression nameValuePair, 486 Type thisAnnotationType, boolean badAnnotation, Env<AttrContext> env, boolean elidedValue) 487 { 488 if (!nameValuePair.hasTag(ASSIGN)) { 489 log.error(nameValuePair.pos(), "annotation.value.must.be.name.value"); 490 attributeAnnotationValue(nameValuePair.type = syms.errType, nameValuePair, env); 491 return null; 492 } 493 JCAssign assign = (JCAssign)nameValuePair; 494 if (!assign.lhs.hasTag(IDENT)) { 495 log.error(nameValuePair.pos(), "annotation.value.must.be.name.value"); 496 attributeAnnotationValue(nameValuePair.type = syms.errType, nameValuePair, env); 497 return null; 498 } 499 500 // Resolve element to MethodSym 501 JCIdent left = (JCIdent)assign.lhs; 502 Symbol method = resolve.resolveQualifiedMethod(elidedValue ? assign.rhs.pos() : left.pos(), 503 env, thisAnnotationType, 504 left.name, List.nil(), null); 505 left.sym = method; 506 left.type = method.type; 507 if (method.owner != thisAnnotationType.tsym && !badAnnotation) 508 log.error(left.pos(), "no.annotation.member", left.name, thisAnnotationType); 509 Type resultType = method.type.getReturnType(); 510 511 // Compute value part 512 Attribute value = attributeAnnotationValue(resultType, assign.rhs, env); 513 nameValuePair.type = resultType; 514 515 return method.type.isErroneous() ? null : new Pair<>((MethodSymbol)method, value); 516 517 } 518 519 /** Attribute an annotation element value */ 520 private Attribute attributeAnnotationValue(Type expectedElementType, JCExpression tree, 521 Env<AttrContext> env) 522 { 523 //first, try completing the symbol for the annotation value - if acompletion 524 //error is thrown, we should recover gracefully, and display an 525 //ordinary resolution diagnostic. 526 try { 527 expectedElementType.tsym.complete(); 528 } catch(CompletionFailure e) { 529 log.error(tree.pos(), "cant.resolve", Kinds.kindName(e.sym), e.sym); 530 expectedElementType = syms.errType; 531 } 532 533 if (expectedElementType.hasTag(ARRAY)) { 534 return getAnnotationArrayValue(expectedElementType, tree, env); 535 536 } 537 538 //error recovery 539 if (tree.hasTag(NEWARRAY)) { 540 if (!expectedElementType.isErroneous()) 541 log.error(tree.pos(), "annotation.value.not.allowable.type"); 542 JCNewArray na = (JCNewArray)tree; 543 if (na.elemtype != null) { 544 log.error(na.elemtype.pos(), "new.not.allowed.in.annotation"); 545 } 546 for (List<JCExpression> l = na.elems; l.nonEmpty(); l=l.tail) { 547 attributeAnnotationValue(syms.errType, 548 l.head, 549 env); 550 } 551 return new Attribute.Error(syms.errType); 552 } 553 554 if (expectedElementType.tsym.isAnnotationType()) { 555 if (tree.hasTag(ANNOTATION)) { 556 return attributeAnnotation((JCAnnotation)tree, expectedElementType, env); 557 } else { 558 log.error(tree.pos(), "annotation.value.must.be.annotation"); 559 expectedElementType = syms.errType; 560 } 561 } 562 563 //error recovery 564 if (tree.hasTag(ANNOTATION)) { 565 if (!expectedElementType.isErroneous()) 566 log.error(tree.pos(), "annotation.not.valid.for.type", expectedElementType); 567 attributeAnnotation((JCAnnotation)tree, syms.errType, env); 568 return new Attribute.Error(((JCAnnotation)tree).annotationType.type); 569 } 570 571 MemberEnter.InitTreeVisitor initTreeVisitor = new MemberEnter.InitTreeVisitor() { 572 // the methods below are added to allow class literals on top of constant expressions 573 @Override 574 public void visitTypeIdent(JCPrimitiveTypeTree that) {} 575 576 @Override 577 public void visitTypeArray(JCArrayTypeTree that) {} 578 }; 579 tree.accept(initTreeVisitor); 580 if (!initTreeVisitor.result) { 581 log.error(tree.pos(), Errors.ExpressionNotAllowableAsAnnotationValue); 582 return new Attribute.Error(syms.errType); 583 } 584 585 if (expectedElementType.isPrimitive() || 586 (types.isSameType(expectedElementType, syms.stringType) && !expectedElementType.hasTag(TypeTag.ERROR))) { 587 return getAnnotationPrimitiveValue(expectedElementType, tree, env); 588 } 589 590 if (expectedElementType.tsym == syms.classType.tsym) { 591 return getAnnotationClassValue(expectedElementType, tree, env); 592 } 593 594 if (expectedElementType.hasTag(CLASS) && 595 (expectedElementType.tsym.flags() & Flags.ENUM) != 0) { 596 return getAnnotationEnumValue(expectedElementType, tree, env); 597 } 598 599 //error recovery: 600 if (!expectedElementType.isErroneous()) 601 log.error(tree.pos(), "annotation.value.not.allowable.type"); 602 return new Attribute.Error(attr.attribExpr(tree, env, expectedElementType)); 603 } 604 605 private Attribute getAnnotationEnumValue(Type expectedElementType, JCExpression tree, Env<AttrContext> env) { 606 Type result = attr.attribExpr(tree, env, expectedElementType); 607 Symbol sym = TreeInfo.symbol(tree); 608 if (sym == null || 609 TreeInfo.nonstaticSelect(tree) || 610 sym.kind != VAR || 611 (sym.flags() & Flags.ENUM) == 0) { 612 log.error(tree.pos(), "enum.annotation.must.be.enum.constant"); 613 return new Attribute.Error(result.getOriginalType()); 614 } 615 VarSymbol enumerator = (VarSymbol) sym; 616 return new Attribute.Enum(expectedElementType, enumerator); 617 } 618 619 private Attribute getAnnotationClassValue(Type expectedElementType, JCExpression tree, Env<AttrContext> env) { 620 Type result = attr.attribExpr(tree, env, expectedElementType); 621 if (result.isErroneous()) { 622 // Does it look like an unresolved class literal? 623 if (TreeInfo.name(tree) == names._class && 624 ((JCFieldAccess) tree).selected.type.isErroneous()) { 625 Name n = (((JCFieldAccess) tree).selected).type.tsym.flatName(); 626 return new Attribute.UnresolvedClass(expectedElementType, 627 types.createErrorType(n, 628 syms.unknownSymbol, syms.classType)); 629 } else { 630 return new Attribute.Error(result.getOriginalType()); 631 } 632 } 633 634 return new Attribute.Class(types, 635 (((JCFieldAccess) tree).selected).type); 636 } 637 638 private Attribute getAnnotationPrimitiveValue(Type expectedElementType, JCExpression tree, Env<AttrContext> env) { 639 Type result = attr.attribExpr(tree, env, expectedElementType); 640 if (result.isErroneous()) 641 return new Attribute.Error(result.getOriginalType()); 642 if (result.constValue() == null) { 643 log.error(tree.pos(), "attribute.value.must.be.constant"); 644 return new Attribute.Error(expectedElementType); 645 } 646 result = cfolder.coerce(result, expectedElementType); 647 return new Attribute.Constant(expectedElementType, result.constValue()); 648 } 649 650 private Attribute getAnnotationArrayValue(Type expectedElementType, JCExpression tree, Env<AttrContext> env) { 651 // Special case, implicit array 652 if (!tree.hasTag(NEWARRAY)) { 653 tree = make.at(tree.pos). 654 NewArray(null, List.nil(), List.of(tree)); 655 } 656 657 JCNewArray na = (JCNewArray)tree; 658 if (na.elemtype != null) { 659 log.error(na.elemtype.pos(), "new.not.allowed.in.annotation"); 660 } 661 ListBuffer<Attribute> buf = new ListBuffer<>(); 662 for (List<JCExpression> l = na.elems; l.nonEmpty(); l=l.tail) { 663 buf.append(attributeAnnotationValue(types.elemtype(expectedElementType), 664 l.head, 665 env)); 666 } 667 na.type = expectedElementType; 668 return new Attribute. 669 Array(expectedElementType, buf.toArray(new Attribute[buf.length()])); 670 } 671 672 /* ********************************* 673 * Support for repeating annotations 674 ***********************************/ 675 676 /** 677 * This context contains all the information needed to synthesize new 678 * annotations trees for repeating annotations. 679 */ 680 private class AnnotationContext<T extends Attribute.Compound> { 681 public final Env<AttrContext> env; 682 public final Map<Symbol.TypeSymbol, ListBuffer<T>> annotated; 683 public final Map<T, JCDiagnostic.DiagnosticPosition> pos; 684 public final boolean isTypeCompound; 685 686 public AnnotationContext(Env<AttrContext> env, 687 Map<Symbol.TypeSymbol, ListBuffer<T>> annotated, 688 Map<T, JCDiagnostic.DiagnosticPosition> pos, 689 boolean isTypeCompound) { 690 Assert.checkNonNull(env); 691 Assert.checkNonNull(annotated); 692 Assert.checkNonNull(pos); 693 694 this.env = env; 695 this.annotated = annotated; 696 this.pos = pos; 697 this.isTypeCompound = isTypeCompound; 698 } 699 } 700 701 /* Process repeated annotations. This method returns the 702 * synthesized container annotation or null IFF all repeating 703 * annotation are invalid. This method reports errors/warnings. 704 */ 705 private <T extends Attribute.Compound> T processRepeatedAnnotations(List<T> annotations, 706 AnnotationContext<T> ctx, Symbol on, boolean isTypeParam) 707 { 708 T firstOccurrence = annotations.head; 709 List<Attribute> repeated = List.nil(); 710 Type origAnnoType = null; 711 Type arrayOfOrigAnnoType = null; 712 Type targetContainerType = null; 713 MethodSymbol containerValueSymbol = null; 714 715 Assert.check(!annotations.isEmpty() && !annotations.tail.isEmpty()); // i.e. size() > 1 716 717 int count = 0; 718 for (List<T> al = annotations; !al.isEmpty(); al = al.tail) { 719 count++; 720 721 // There must be more than a single anno in the annotation list 722 Assert.check(count > 1 || !al.tail.isEmpty()); 723 724 T currentAnno = al.head; 725 726 origAnnoType = currentAnno.type; 727 if (arrayOfOrigAnnoType == null) { 728 arrayOfOrigAnnoType = types.makeArrayType(origAnnoType); 729 } 730 731 // Only report errors if this isn't the first occurrence I.E. count > 1 732 boolean reportError = count > 1; 733 Type currentContainerType = getContainingType(currentAnno, ctx.pos.get(currentAnno), reportError); 734 if (currentContainerType == null) { 735 continue; 736 } 737 // Assert that the target Container is == for all repeated 738 // annos of the same annotation type, the types should 739 // come from the same Symbol, i.e. be '==' 740 Assert.check(targetContainerType == null || currentContainerType == targetContainerType); 741 targetContainerType = currentContainerType; 742 743 containerValueSymbol = validateContainer(targetContainerType, origAnnoType, ctx.pos.get(currentAnno)); 744 745 if (containerValueSymbol == null) { // Check of CA type failed 746 // errors are already reported 747 continue; 748 } 749 750 repeated = repeated.prepend(currentAnno); 751 } 752 753 if (!repeated.isEmpty() && targetContainerType == null) { 754 log.error(ctx.pos.get(annotations.head), "duplicate.annotation.invalid.repeated", origAnnoType); 755 return null; 756 } 757 758 if (!repeated.isEmpty()) { 759 repeated = repeated.reverse(); 760 DiagnosticPosition pos = ctx.pos.get(firstOccurrence); 761 TreeMaker m = make.at(pos); 762 Pair<MethodSymbol, Attribute> p = 763 new Pair<MethodSymbol, Attribute>(containerValueSymbol, 764 new Attribute.Array(arrayOfOrigAnnoType, repeated)); 765 if (ctx.isTypeCompound) { 766 /* TODO: the following code would be cleaner: 767 Attribute.TypeCompound at = new Attribute.TypeCompound(targetContainerType, List.of(p), 768 ((Attribute.TypeCompound)annotations.head).position); 769 JCTypeAnnotation annoTree = m.TypeAnnotation(at); 770 at = attributeTypeAnnotation(annoTree, targetContainerType, ctx.env); 771 */ 772 // However, we directly construct the TypeCompound to keep the 773 // direct relation to the contained TypeCompounds. 774 Attribute.TypeCompound at = new Attribute.TypeCompound(targetContainerType, List.of(p), 775 ((Attribute.TypeCompound)annotations.head).position); 776 777 JCAnnotation annoTree = m.TypeAnnotation(at); 778 if (!chk.validateAnnotationDeferErrors(annoTree)) 779 log.error(annoTree.pos(), Errors.DuplicateAnnotationInvalidRepeated(origAnnoType)); 780 781 if (!chk.isTypeAnnotation(annoTree, isTypeParam)) { 782 log.error(pos, isTypeParam ? Errors.InvalidRepeatableAnnotationNotApplicable(targetContainerType, on) 783 : Errors.InvalidRepeatableAnnotationNotApplicableInContext(targetContainerType)); 784 } 785 786 at.setSynthesized(true); 787 788 @SuppressWarnings("unchecked") 789 T x = (T) at; 790 return x; 791 } else { 792 Attribute.Compound c = new Attribute.Compound(targetContainerType, List.of(p)); 793 JCAnnotation annoTree = m.Annotation(c); 794 795 if (!chk.annotationApplicable(annoTree, on)) { 796 log.error(annoTree.pos(), 797 Errors.InvalidRepeatableAnnotationNotApplicable(targetContainerType, on)); 798 } 799 800 if (!chk.validateAnnotationDeferErrors(annoTree)) 801 log.error(annoTree.pos(), "duplicate.annotation.invalid.repeated", origAnnoType); 802 803 c = attributeAnnotation(annoTree, targetContainerType, ctx.env); 804 c.setSynthesized(true); 805 806 @SuppressWarnings("unchecked") 807 T x = (T) c; 808 return x; 809 } 810 } else { 811 return null; // errors should have been reported elsewhere 812 } 813 } 814 815 /** 816 * Fetches the actual Type that should be the containing annotation. 817 */ 818 private Type getContainingType(Attribute.Compound currentAnno, 819 DiagnosticPosition pos, 820 boolean reportError) 821 { 822 Type origAnnoType = currentAnno.type; 823 TypeSymbol origAnnoDecl = origAnnoType.tsym; 824 825 // Fetch the Repeatable annotation from the current 826 // annotation's declaration, or null if it has none 827 Attribute.Compound ca = origAnnoDecl.getAnnotationTypeMetadata().getRepeatable(); 828 if (ca == null) { // has no Repeatable annotation 829 if (reportError) 830 log.error(pos, "duplicate.annotation.missing.container", origAnnoType, syms.repeatableType); 831 return null; 832 } 833 834 return filterSame(extractContainingType(ca, pos, origAnnoDecl), 835 origAnnoType); 836 } 837 838 // returns null if t is same as 's', returns 't' otherwise 839 private Type filterSame(Type t, Type s) { 840 if (t == null || s == null) { 841 return t; 842 } 843 844 return types.isSameType(t, s) ? null : t; 845 } 846 847 /** Extract the actual Type to be used for a containing annotation. */ 848 private Type extractContainingType(Attribute.Compound ca, 849 DiagnosticPosition pos, 850 TypeSymbol annoDecl) 851 { 852 // The next three checks check that the Repeatable annotation 853 // on the declaration of the annotation type that is repeating is 854 // valid. 855 856 // Repeatable must have at least one element 857 if (ca.values.isEmpty()) { 858 log.error(pos, "invalid.repeatable.annotation", annoDecl); 859 return null; 860 } 861 Pair<MethodSymbol,Attribute> p = ca.values.head; 862 Name name = p.fst.name; 863 if (name != names.value) { // should contain only one element, named "value" 864 log.error(pos, "invalid.repeatable.annotation", annoDecl); 865 return null; 866 } 867 if (!(p.snd instanceof Attribute.Class)) { // check that the value of "value" is an Attribute.Class 868 log.error(pos, "invalid.repeatable.annotation", annoDecl); 869 return null; 870 } 871 872 return ((Attribute.Class)p.snd).getValue(); 873 } 874 875 /* Validate that the suggested targetContainerType Type is a valid 876 * container type for repeated instances of originalAnnoType 877 * annotations. Return null and report errors if this is not the 878 * case, return the MethodSymbol of the value element in 879 * targetContainerType if it is suitable (this is needed to 880 * synthesize the container). */ 881 private MethodSymbol validateContainer(Type targetContainerType, 882 Type originalAnnoType, 883 DiagnosticPosition pos) { 884 MethodSymbol containerValueSymbol = null; 885 boolean fatalError = false; 886 887 // Validate that there is a (and only 1) value method 888 Scope scope = targetContainerType.tsym.members(); 889 int nr_value_elems = 0; 890 boolean error = false; 891 for(Symbol elm : scope.getSymbolsByName(names.value)) { 892 nr_value_elems++; 893 894 if (nr_value_elems == 1 && 895 elm.kind == MTH) { 896 containerValueSymbol = (MethodSymbol)elm; 897 } else { 898 error = true; 899 } 900 } 901 if (error) { 902 log.error(pos, 903 "invalid.repeatable.annotation.multiple.values", 904 targetContainerType, 905 nr_value_elems); 906 return null; 907 } else if (nr_value_elems == 0) { 908 log.error(pos, 909 "invalid.repeatable.annotation.no.value", 910 targetContainerType); 911 return null; 912 } 913 914 // validate that the 'value' element is a method 915 // probably "impossible" to fail this 916 if (containerValueSymbol.kind != MTH) { 917 log.error(pos, 918 "invalid.repeatable.annotation.invalid.value", 919 targetContainerType); 920 fatalError = true; 921 } 922 923 // validate that the 'value' element has the correct return type 924 // i.e. array of original anno 925 Type valueRetType = containerValueSymbol.type.getReturnType(); 926 Type expectedType = types.makeArrayType(originalAnnoType); 927 if (!(types.isArray(valueRetType) && 928 types.isSameType(expectedType, valueRetType))) { 929 log.error(pos, 930 "invalid.repeatable.annotation.value.return", 931 targetContainerType, 932 valueRetType, 933 expectedType); 934 fatalError = true; 935 } 936 937 return fatalError ? null : containerValueSymbol; 938 } 939 940 private <T extends Attribute.Compound> T makeContainerAnnotation(List<T> toBeReplaced, 941 AnnotationContext<T> ctx, Symbol sym, boolean isTypeParam) 942 { 943 // Process repeated annotations 944 T validRepeated = 945 processRepeatedAnnotations(toBeReplaced, ctx, sym, isTypeParam); 946 947 if (validRepeated != null) { 948 // Check that the container isn't manually 949 // present along with repeated instances of 950 // its contained annotation. 951 ListBuffer<T> manualContainer = ctx.annotated.get(validRepeated.type.tsym); 952 if (manualContainer != null) { 953 log.error(ctx.pos.get(manualContainer.first()), 954 "invalid.repeatable.annotation.repeated.and.container.present", 955 manualContainer.first().type.tsym); 956 } 957 } 958 959 // A null return will delete the Placeholder 960 return validRepeated; 961 } 962 963 /******************** 964 * Type annotations * 965 ********************/ 966 967 /** 968 * Attribute the list of annotations and enter them onto s. 969 */ 970 public void enterTypeAnnotations(List<JCAnnotation> annotations, Env<AttrContext> env, 971 Symbol s, DiagnosticPosition deferPos, boolean isTypeParam) 972 { 973 Assert.checkNonNull(s, "Symbol argument to actualEnterTypeAnnotations is nul/"); 974 JavaFileObject prev = log.useSource(env.toplevel.sourcefile); 975 DiagnosticPosition prevLintPos = null; 976 977 if (deferPos != null) { 978 prevLintPos = deferredLintHandler.setPos(deferPos); 979 } 980 try { 981 annotateNow(s, annotations, env, true, isTypeParam); 982 } finally { 983 if (prevLintPos != null) 984 deferredLintHandler.setPos(prevLintPos); 985 log.useSource(prev); 986 } 987 } 988 989 /** 990 * Enqueue tree for scanning of type annotations, attaching to the Symbol sym. 991 */ 992 public void queueScanTreeAndTypeAnnotate(JCTree tree, Env<AttrContext> env, Symbol sym, 993 DiagnosticPosition deferPos) 994 { 995 Assert.checkNonNull(sym); 996 normal(() -> tree.accept(new TypeAnnotate(env, sym, deferPos))); 997 } 998 999 /** 1000 * Apply the annotations to the particular type. 1001 */ 1002 public void annotateTypeSecondStage(JCTree tree, List<JCAnnotation> annotations, Type storeAt) { 1003 typeAnnotation(() -> { 1004 List<Attribute.TypeCompound> compounds = fromAnnotations(annotations); 1005 Assert.check(annotations.size() == compounds.size()); 1006 storeAt.getMetadataOfKind(Kind.ANNOTATIONS).combine(new TypeMetadata.Annotations(compounds)); 1007 }); 1008 } 1009 1010 /** 1011 * Apply the annotations to the particular type. 1012 */ 1013 public void annotateTypeParameterSecondStage(JCTree tree, List<JCAnnotation> annotations) { 1014 typeAnnotation(() -> { 1015 List<Attribute.TypeCompound> compounds = fromAnnotations(annotations); 1016 Assert.check(annotations.size() == compounds.size()); 1017 }); 1018 } 1019 1020 /** 1021 * We need to use a TreeScanner, because it is not enough to visit the top-level 1022 * annotations. We also need to visit type arguments, etc. 1023 */ 1024 private class TypeAnnotate extends TreeScanner { 1025 private final Env<AttrContext> env; 1026 private final Symbol sym; 1027 private DiagnosticPosition deferPos; 1028 1029 public TypeAnnotate(Env<AttrContext> env, Symbol sym, DiagnosticPosition deferPos) { 1030 1031 this.env = env; 1032 this.sym = sym; 1033 this.deferPos = deferPos; 1034 } 1035 1036 @Override 1037 public void visitAnnotatedType(JCAnnotatedType tree) { 1038 enterTypeAnnotations(tree.annotations, env, sym, deferPos, false); 1039 scan(tree.underlyingType); 1040 } 1041 1042 @Override 1043 public void visitTypeParameter(JCTypeParameter tree) { 1044 enterTypeAnnotations(tree.annotations, env, sym, deferPos, true); 1045 scan(tree.bounds); 1046 } 1047 1048 @Override 1049 public void visitNewArray(JCNewArray tree) { 1050 enterTypeAnnotations(tree.annotations, env, sym, deferPos, false); 1051 for (List<JCAnnotation> dimAnnos : tree.dimAnnotations) 1052 enterTypeAnnotations(dimAnnos, env, sym, deferPos, false); 1053 scan(tree.elemtype); 1054 scan(tree.elems); 1055 } 1056 1057 @Override 1058 public void visitMethodDef(JCMethodDecl tree) { 1059 scan(tree.mods); 1060 scan(tree.restype); 1061 scan(tree.typarams); 1062 scan(tree.recvparam); 1063 scan(tree.params); 1064 scan(tree.thrown); 1065 scan(tree.defaultValue); 1066 // Do not annotate the body, just the signature. 1067 } 1068 1069 @Override 1070 public void visitVarDef(JCVariableDecl tree) { 1071 DiagnosticPosition prevPos = deferPos; 1072 deferPos = tree.pos(); 1073 try { 1074 if (sym != null && sym.kind == VAR) { 1075 // Don't visit a parameter once when the sym is the method 1076 // and once when the sym is the parameter. 1077 scan(tree.mods); 1078 scan(tree.vartype); 1079 } 1080 scan(tree.init); 1081 } finally { 1082 deferPos = prevPos; 1083 } 1084 } 1085 1086 @Override 1087 public void visitClassDef(JCClassDecl tree) { 1088 // We can only hit a classdef if it is declared within 1089 // a method. Ignore it - the class will be visited 1090 // separately later. 1091 } 1092 1093 @Override 1094 public void visitNewClass(JCNewClass tree) { 1095 scan(tree.encl); 1096 scan(tree.typeargs); 1097 scan(tree.clazz); 1098 scan(tree.args); 1099 // the anonymous class instantiation if any will be visited separately. 1100 } 1101 } 1102 1103 /********************* 1104 * Completer support * 1105 *********************/ 1106 1107 private AnnotationTypeCompleter theSourceCompleter = new AnnotationTypeCompleter() { 1108 @Override 1109 public void complete(ClassSymbol sym) throws CompletionFailure { 1110 Env<AttrContext> context = typeEnvs.get(sym); 1111 Annotate.this.attributeAnnotationType(context); 1112 } 1113 }; 1114 1115 /* Last stage completer to enter just enough annotations to have a prototype annotation type. 1116 * This currently means entering @Target and @Repetable. 1117 */ 1118 public AnnotationTypeCompleter annotationTypeSourceCompleter() { 1119 return theSourceCompleter; 1120 } 1121 1122 private void attributeAnnotationType(Env<AttrContext> env) { 1123 Assert.check(((JCClassDecl)env.tree).sym.isAnnotationType(), 1124 "Trying to annotation type complete a non-annotation type"); 1125 1126 JavaFileObject prev = log.useSource(env.toplevel.sourcefile); 1127 try { 1128 JCClassDecl tree = (JCClassDecl)env.tree; 1129 AnnotationTypeVisitor v = new AnnotationTypeVisitor(attr, chk, syms, typeEnvs); 1130 v.scanAnnotationType(tree); 1131 tree.sym.getAnnotationTypeMetadata().setRepeatable(v.repeatable); 1132 tree.sym.getAnnotationTypeMetadata().setTarget(v.target); 1133 } finally { 1134 log.useSource(prev); 1135 } 1136 } 1137 1138 public Attribute unfinishedDefaultValue() { 1139 return theUnfinishedDefaultValue; 1140 } 1141 1142 public static interface AnnotationTypeCompleter { 1143 void complete(ClassSymbol sym) throws CompletionFailure; 1144 } 1145 1146 /** Visitor to determine a prototype annotation type for a class declaring an annotation type. 1147 * 1148 * <p><b>This is NOT part of any supported API. 1149 * If you write code that depends on this, you do so at your own risk. 1150 * This code and its internal interfaces are subject to change or 1151 * deletion without notice.</b> 1152 */ 1153 public class AnnotationTypeVisitor extends TreeScanner { 1154 private Env<AttrContext> env; 1155 1156 private final Attr attr; 1157 private final Check check; 1158 private final Symtab tab; 1159 private final TypeEnvs typeEnvs; 1160 1161 private Compound target; 1162 private Compound repeatable; 1163 1164 public AnnotationTypeVisitor(Attr attr, Check check, Symtab tab, TypeEnvs typeEnvs) { 1165 this.attr = attr; 1166 this.check = check; 1167 this.tab = tab; 1168 this.typeEnvs = typeEnvs; 1169 } 1170 1171 public Compound getRepeatable() { 1172 return repeatable; 1173 } 1174 1175 public Compound getTarget() { 1176 return target; 1177 } 1178 1179 public void scanAnnotationType(JCClassDecl decl) { 1180 visitClassDef(decl); 1181 } 1182 1183 @Override 1184 public void visitClassDef(JCClassDecl tree) { 1185 Env<AttrContext> prevEnv = env; 1186 env = typeEnvs.get(tree.sym); 1187 try { 1188 scan(tree.mods); // look for repeatable and target 1189 // don't descend into body 1190 } finally { 1191 env = prevEnv; 1192 } 1193 } 1194 1195 @Override 1196 public void visitAnnotation(JCAnnotation tree) { 1197 Type t = tree.annotationType.type; 1198 if (t == null) { 1199 t = attr.attribType(tree.annotationType, env); 1200 tree.annotationType.type = t = check.checkType(tree.annotationType.pos(), t, tab.annotationType); 1201 } 1202 1203 if (t == tab.annotationTargetType) { 1204 target = Annotate.this.attributeAnnotation(tree, tab.annotationTargetType, env); 1205 } else if (t == tab.repeatableType) { 1206 repeatable = Annotate.this.attributeAnnotation(tree, tab.repeatableType, env); 1207 } 1208 } 1209 } 1210 1211 /** Represents the semantics of an Annotation Type. 1212 * 1213 * <p><b>This is NOT part of any supported API. 1214 * If you write code that depends on this, you do so at your own risk. 1215 * This code and its internal interfaces are subject to change or 1216 * deletion without notice.</b> 1217 */ 1218 public static class AnnotationTypeMetadata { 1219 final ClassSymbol metaDataFor; 1220 private Compound target; 1221 private Compound repeatable; 1222 private AnnotationTypeCompleter annotationTypeCompleter; 1223 1224 public AnnotationTypeMetadata(ClassSymbol metaDataFor, AnnotationTypeCompleter annotationTypeCompleter) { 1225 this.metaDataFor = metaDataFor; 1226 this.annotationTypeCompleter = annotationTypeCompleter; 1227 } 1228 1229 private void init() { 1230 // Make sure metaDataFor is member entered 1231 while (!metaDataFor.isCompleted()) 1232 metaDataFor.complete(); 1233 1234 if (annotationTypeCompleter != null) { 1235 AnnotationTypeCompleter c = annotationTypeCompleter; 1236 annotationTypeCompleter = null; 1237 c.complete(metaDataFor); 1238 } 1239 } 1240 1241 public void complete() { 1242 init(); 1243 } 1244 1245 public Compound getRepeatable() { 1246 init(); 1247 return repeatable; 1248 } 1249 1250 public void setRepeatable(Compound repeatable) { 1251 Assert.checkNull(this.repeatable); 1252 this.repeatable = repeatable; 1253 } 1254 1255 public Compound getTarget() { 1256 init(); 1257 return target; 1258 } 1259 1260 public void setTarget(Compound target) { 1261 Assert.checkNull(this.target); 1262 this.target = target; 1263 } 1264 1265 public Set<MethodSymbol> getAnnotationElements() { 1266 init(); 1267 Set<MethodSymbol> members = new LinkedHashSet<>(); 1268 WriteableScope s = metaDataFor.members(); 1269 Iterable<Symbol> ss = s.getSymbols(NON_RECURSIVE); 1270 for (Symbol sym : ss) 1271 if (sym.kind == MTH && 1272 sym.name != sym.name.table.names.clinit && 1273 (sym.flags() & SYNTHETIC) == 0) 1274 members.add((MethodSymbol)sym); 1275 return members; 1276 } 1277 1278 public Set<MethodSymbol> getAnnotationElementsWithDefault() { 1279 init(); 1280 Set<MethodSymbol> members = getAnnotationElements(); 1281 Set<MethodSymbol> res = new LinkedHashSet<>(); 1282 for (MethodSymbol m : members) 1283 if (m.defaultValue != null) 1284 res.add(m); 1285 return res; 1286 } 1287 1288 @Override 1289 public String toString() { 1290 return "Annotation type for: " + metaDataFor; 1291 } 1292 1293 public boolean isMetadataForAnnotationType() { return true; } 1294 1295 public static AnnotationTypeMetadata notAnAnnotationType() { 1296 return NOT_AN_ANNOTATION_TYPE; 1297 } 1298 1299 private static final AnnotationTypeMetadata NOT_AN_ANNOTATION_TYPE = 1300 new AnnotationTypeMetadata(null, null) { 1301 @Override 1302 public void complete() { 1303 } // do nothing 1304 1305 @Override 1306 public String toString() { 1307 return "Not an annotation type"; 1308 } 1309 1310 @Override 1311 public Set<MethodSymbol> getAnnotationElements() { 1312 return new LinkedHashSet<>(0); 1313 } 1314 1315 @Override 1316 public Set<MethodSymbol> getAnnotationElementsWithDefault() { 1317 return new LinkedHashSet<>(0); 1318 } 1319 1320 @Override 1321 public boolean isMetadataForAnnotationType() { 1322 return false; 1323 } 1324 1325 @Override 1326 public Compound getTarget() { 1327 return null; 1328 } 1329 1330 @Override 1331 public Compound getRepeatable() { 1332 return null; 1333 } 1334 }; 1335 } 1336 1337 public void newRound() { 1338 blockCount = 1; 1339 } 1340} 1341