1 /* 2 * Copyright (c) 2003, 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 com.sun.tools.javac.comp; 27 28 import com.sun.tools.javac.code.*; 29 import com.sun.tools.javac.code.Attribute.Compound; 30 import com.sun.tools.javac.code.Attribute.TypeCompound; 31 import com.sun.tools.javac.code.Kinds.KindSelector; 32 import com.sun.tools.javac.code.Scope.WriteableScope; 33 import com.sun.tools.javac.code.Source.Feature; 34 import com.sun.tools.javac.code.Symbol.*; 35 import com.sun.tools.javac.code.TypeMetadata.Annotations; 36 import com.sun.tools.javac.comp.Check.CheckContext; 37 import com.sun.tools.javac.resources.CompilerProperties.Errors; 38 import com.sun.tools.javac.resources.CompilerProperties.Fragments; 39 import com.sun.tools.javac.tree.JCTree; 40 import com.sun.tools.javac.tree.JCTree.*; 41 import com.sun.tools.javac.tree.TreeInfo; 42 import com.sun.tools.javac.tree.TreeMaker; 43 import com.sun.tools.javac.tree.TreeScanner; 44 import com.sun.tools.javac.util.*; 45 import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition; 46 import com.sun.tools.javac.util.List; 47 48 import javax.tools.JavaFileObject; 49 50 import java.util.*; 51 52 import static com.sun.tools.javac.code.Flags.SYNTHETIC; 53 import static com.sun.tools.javac.code.Kinds.Kind.MDL; 54 import static com.sun.tools.javac.code.Kinds.Kind.MTH; 55 import static com.sun.tools.javac.code.Kinds.Kind.PCK; 56 import static com.sun.tools.javac.code.Kinds.Kind.TYP; 57 import static com.sun.tools.javac.code.Kinds.Kind.VAR; 58 import static com.sun.tools.javac.code.Scope.LookupKind.NON_RECURSIVE; 59 import static com.sun.tools.javac.code.TypeTag.ARRAY; 60 import static com.sun.tools.javac.code.TypeTag.CLASS; 61 import static com.sun.tools.javac.tree.JCTree.Tag.ANNOTATION; 62 import static com.sun.tools.javac.tree.JCTree.Tag.ASSIGN; 63 import static com.sun.tools.javac.tree.JCTree.Tag.IDENT; 64 import static com.sun.tools.javac.tree.JCTree.Tag.NEWARRAY; 65 66 import com.sun.tools.javac.util.JCDiagnostic.DiagnosticFlag; 67 68 69 /** Enter annotations onto symbols and types (and trees). 70 * 71 * This is also a pseudo stage in the compiler taking care of scheduling when annotations are 72 * entered. 73 * 74 * <p><b>This is NOT part of any supported API. 75 * If you write code that depends on this, you do so at your own risk. 76 * This code and its internal interfaces are subject to change or 77 * deletion without notice.</b> 78 */ 79 public class Annotate { 80 protected static final Context.Key<Annotate> annotateKey = new Context.Key<>(); 81 82 public static Annotate instance(Context context) { 83 Annotate instance = context.get(annotateKey); 84 if (instance == null) 85 instance = new Annotate(context); 86 return instance; 87 } 88 89 private final Attr attr; 90 private final Check chk; 91 private final ConstFold cfolder; 92 private final DeferredLintHandler deferredLintHandler; 93 private final Enter enter; 94 private final Lint lint; 95 private final Log log; 96 private final Names names; 97 private final Resolve resolve; 98 private final TreeMaker make; 99 private final Symtab syms; 100 private final TypeEnvs typeEnvs; 101 private final Types types; 102 103 private final Attribute theUnfinishedDefaultValue; 104 private final String sourceName; 105 106 @SuppressWarnings("this-escape") 107 protected Annotate(Context context) { 108 context.put(annotateKey, this); 109 110 attr = Attr.instance(context); 111 chk = Check.instance(context); 112 cfolder = ConstFold.instance(context); 113 deferredLintHandler = DeferredLintHandler.instance(context); 114 enter = Enter.instance(context); 115 log = Log.instance(context); 116 lint = Lint.instance(context); 117 make = TreeMaker.instance(context); 118 names = Names.instance(context); 119 resolve = Resolve.instance(context); 120 syms = Symtab.instance(context); 121 typeEnvs = TypeEnvs.instance(context); 122 types = Types.instance(context); 123 124 theUnfinishedDefaultValue = new Attribute.Error(syms.errType); 125 126 Source source = Source.instance(context); 127 sourceName = source.name; 128 129 blockCount = 1; 130 } 131 132 /** Semaphore to delay annotation processing */ 133 private int blockCount = 0; 134 135 /** Called when annotations processing needs to be postponed. */ 136 public void blockAnnotations() { 137 blockCount++; 138 } 139 140 /** Called when annotation processing can be resumed. */ 141 public void unblockAnnotations() { 142 blockCount--; 143 if (blockCount == 0) 144 flush(); 145 } 146 147 /** Variant which allows for a delayed flush of annotations. 148 * Needed by ClassReader */ 149 public void unblockAnnotationsNoFlush() { 150 blockCount--; 151 } 152 153 /** are we blocking annotation processing? */ 154 public boolean annotationsBlocked() {return blockCount > 0; } 155 156 public void enterDone() { 157 unblockAnnotations(); 158 } 159 160 public List<TypeCompound> fromAnnotations(List<JCAnnotation> annotations) { 161 if (annotations.isEmpty()) { 162 return List.nil(); 163 } 164 165 ListBuffer<TypeCompound> buf = new ListBuffer<>(); 166 for (JCAnnotation anno : annotations) { 167 Assert.checkNonNull(anno.attribute); 168 buf.append((TypeCompound) anno.attribute); 169 } 170 return buf.toList(); 171 } 172 173 /** Annotate (used for everything else) */ 174 public void normal(Runnable r) { 175 q.append(r); 176 } 177 178 /** Validate, triggers after 'normal' */ 179 public void validate(Runnable a) { 180 validateQ.append(a); 181 } 182 183 /** Flush all annotation queues */ 184 public void flush() { 185 if (annotationsBlocked()) return; 186 if (isFlushing()) return; 187 188 startFlushing(); 189 try { 190 while (q.nonEmpty()) { 191 q.next().run(); 192 } 193 while (typesQ.nonEmpty()) { 194 typesQ.next().run(); 195 } 196 while (afterTypesQ.nonEmpty()) { 197 afterTypesQ.next().run(); 198 } 199 while (validateQ.nonEmpty()) { 200 validateQ.next().run(); 201 } 202 } finally { 203 doneFlushing(); 204 } 205 } 206 207 private ListBuffer<Runnable> q = new ListBuffer<>(); 208 private ListBuffer<Runnable> validateQ = new ListBuffer<>(); 209 210 private int flushCount = 0; 211 private boolean isFlushing() { return flushCount > 0; } 212 private void startFlushing() { flushCount++; } 213 private void doneFlushing() { flushCount--; } 214 215 ListBuffer<Runnable> typesQ = new ListBuffer<>(); 216 ListBuffer<Runnable> afterTypesQ = new ListBuffer<>(); 217 218 219 public void typeAnnotation(Runnable a) { 220 typesQ.append(a); 221 } 222 223 public void afterTypes(Runnable a) { 224 afterTypesQ.append(a); 225 } 226 227 /** 228 * Queue annotations for later attribution and entering. This is probably the method you are looking for. 229 * 230 * @param annotations the list of JCAnnotations to attribute and enter 231 * @param localEnv the enclosing env 232 * @param s the Symbol on which to enter the annotations 233 * @param deferPos report errors here 234 */ 235 public void annotateLater(List<JCAnnotation> annotations, Env<AttrContext> localEnv, 236 Symbol s, DiagnosticPosition deferPos) 237 { 238 if (annotations.isEmpty()) { 239 return; 240 } 241 242 s.resetAnnotations(); // mark Annotations as incomplete for now 243 244 normal(() -> { 245 // Packages are unusual, in that they are the only type of declaration that can legally appear 246 // more than once in a compilation, and in all cases refer to the same underlying symbol. 247 // This means they are the only kind of declaration that syntactically may have multiple sets 248 // of annotations, each on a different package declaration, even though that is ultimately 249 // forbidden by JLS 8 section 7.4. 250 // The corollary here is that all of the annotations on a package symbol may have already 251 // been handled, meaning that the set of annotations pending completion is now empty. 252 Assert.check(s.kind == PCK || s.annotationsPendingCompletion()); 253 JavaFileObject prev = log.useSource(localEnv.toplevel.sourcefile); 254 DiagnosticPosition prevLintPos = 255 deferPos != null 256 ? deferredLintHandler.setPos(deferPos) 257 : deferredLintHandler.immediate(); 258 Lint prevLint = deferPos != null ? null : chk.setLint(lint); 259 try { 260 if (s.hasAnnotations() && annotations.nonEmpty()) 261 log.error(annotations.head.pos, Errors.AlreadyAnnotated(Kinds.kindName(s), s)); 262 263 Assert.checkNonNull(s, "Symbol argument to actualEnterAnnotations is null"); 264 265 // false is passed as fifth parameter since annotateLater is 266 // never called for a type parameter 267 annotateNow(s, annotations, localEnv, false, false); 268 } finally { 269 if (prevLint != null) 270 chk.setLint(prevLint); 271 deferredLintHandler.setPos(prevLintPos); 272 log.useSource(prev); 273 } 274 }); 275 276 validate(() -> { //validate annotations 277 JavaFileObject prev = log.useSource(localEnv.toplevel.sourcefile); 278 try { 279 chk.validateAnnotations(annotations, TreeInfo.declarationFor(s, localEnv.tree), s); 280 } finally { 281 log.useSource(prev); 282 } 283 }); 284 } 285 286 287 /** Queue processing of an attribute default value. */ 288 public void annotateDefaultValueLater(JCExpression defaultValue, Env<AttrContext> localEnv, 289 MethodSymbol m, DiagnosticPosition deferPos) 290 { 291 normal(() -> { 292 JavaFileObject prev = log.useSource(localEnv.toplevel.sourcefile); 293 DiagnosticPosition prevLintPos = deferredLintHandler.setPos(deferPos); 294 try { 295 enterDefaultValue(defaultValue, localEnv, m); 296 } finally { 297 deferredLintHandler.setPos(prevLintPos); 298 log.useSource(prev); 299 } 300 }); 301 302 validate(() -> { //validate annotations 303 JavaFileObject prev = log.useSource(localEnv.toplevel.sourcefile); 304 try { 305 // if default value is an annotation, check it is a well-formed 306 // annotation value (e.g. no duplicate values, no missing values, etc.) 307 chk.validateAnnotationTree(defaultValue); 308 } finally { 309 log.useSource(prev); 310 } 311 }); 312 } 313 314 /** Enter a default value for an annotation element. */ 315 private void enterDefaultValue(JCExpression defaultValue, 316 Env<AttrContext> localEnv, MethodSymbol m) { 317 m.defaultValue = attributeAnnotationValue(m.type.getReturnType(), defaultValue, localEnv); 318 } 319 320 /** 321 * Gather up annotations into a map from type symbols to lists of Compound attributes, 322 * then continue on with repeating annotations processing. 323 */ 324 private <T extends Attribute.Compound> void annotateNow(Symbol toAnnotate, 325 List<JCAnnotation> withAnnotations, Env<AttrContext> env, boolean typeAnnotations, 326 boolean isTypeParam) 327 { 328 Map<TypeSymbol, ListBuffer<T>> annotated = new LinkedHashMap<>(); 329 Map<T, DiagnosticPosition> pos = new HashMap<>(); 330 331 for (List<JCAnnotation> al = withAnnotations; !al.isEmpty(); al = al.tail) { 332 JCAnnotation a = al.head; 333 334 T c; 335 if (typeAnnotations) { 336 @SuppressWarnings("unchecked") 337 T tmp = (T)attributeTypeAnnotation(a, syms.annotationType, env); 338 c = tmp; 339 } else { 340 @SuppressWarnings("unchecked") 341 T tmp = (T)attributeAnnotation(a, syms.annotationType, env); 342 c = tmp; 343 } 344 345 Assert.checkNonNull(c, "Failed to create annotation"); 346 347 if (a.type.isErroneous() || a.type.tsym.isAnnotationType()) { 348 if (annotated.containsKey(a.type.tsym)) { 349 ListBuffer<T> l = annotated.get(a.type.tsym); 350 l = l.append(c); 351 annotated.put(a.type.tsym, l); 352 pos.put(c, a.pos()); 353 } else { 354 annotated.put(a.type.tsym, ListBuffer.of(c)); 355 pos.put(c, a.pos()); 356 } 357 } 358 359 // Note: @Deprecated has no effect on local variables and parameters 360 if (!c.type.isErroneous() 361 && (toAnnotate.kind == MDL || toAnnotate.owner.kind != MTH) 362 && types.isSameType(c.type, syms.deprecatedType)) { 363 toAnnotate.flags_field |= (Flags.DEPRECATED | Flags.DEPRECATED_ANNOTATION); 364 if (isAttributeTrue(c.member(names.forRemoval))) { 365 toAnnotate.flags_field |= Flags.DEPRECATED_REMOVAL; 366 } 367 } 368 369 if (!c.type.isErroneous() 370 && types.isSameType(c.type, syms.previewFeatureType)) { 371 toAnnotate.flags_field |= Flags.PREVIEW_API; 372 if (isAttributeTrue(c.member(names.reflective))) { 373 toAnnotate.flags_field |= Flags.PREVIEW_REFLECTIVE; 374 } 375 } 376 377 if (!c.type.isErroneous() 378 && toAnnotate.kind == TYP 379 && types.isSameType(c.type, syms.valueBasedType)) { 380 toAnnotate.flags_field |= Flags.VALUE_BASED; 381 } 382 383 if (!c.type.isErroneous() 384 && types.isSameType(c.type, syms.restrictedType)) { 385 toAnnotate.flags_field |= Flags.RESTRICTED; 386 } 387 } 388 389 List<T> buf = List.nil(); 390 for (ListBuffer<T> lb : annotated.values()) { 391 if (lb.size() == 1) { 392 buf = buf.prepend(lb.first()); 393 } else { 394 AnnotationContext<T> ctx = new AnnotationContext<>(env, annotated, pos, typeAnnotations); 395 T res = makeContainerAnnotation(lb.toList(), ctx, toAnnotate, isTypeParam); 396 if (res != null) 397 buf = buf.prepend(res); 398 } 399 } 400 401 if (typeAnnotations) { 402 @SuppressWarnings("unchecked") 403 List<TypeCompound> attrs = (List<TypeCompound>)buf.reverse(); 404 toAnnotate.appendUniqueTypeAttributes(attrs); 405 } else { 406 @SuppressWarnings("unchecked") 407 List<Attribute.Compound> attrs = (List<Attribute.Compound>)buf.reverse(); 408 toAnnotate.resetAnnotations(); 409 toAnnotate.setDeclarationAttributes(attrs); 410 } 411 } 412 //where: 413 private boolean isAttributeTrue(Attribute attr) { 414 return (attr instanceof Attribute.Constant constant) 415 && constant.type == syms.booleanType 416 && ((Integer) constant.value) != 0; 417 } 418 419 /** 420 * Attribute and store a semantic representation of the annotation tree {@code tree} into the 421 * tree.attribute field. 422 * 423 * @param tree the tree representing an annotation 424 * @param expectedAnnotationType the expected (super)type of the annotation 425 * @param env the current env in where the annotation instance is found 426 */ 427 public Attribute.Compound attributeAnnotation(JCAnnotation tree, Type expectedAnnotationType, 428 Env<AttrContext> env) 429 { 430 // The attribute might have been entered if it is Target or Repeatable 431 // Because TreeCopier does not copy type, redo this if type is null 432 if (tree.attribute != null && tree.type != null) 433 return tree.attribute; 434 435 List<Pair<MethodSymbol, Attribute>> elems = attributeAnnotationValues(tree, expectedAnnotationType, env); 436 Attribute.Compound ac = new Attribute.Compound(tree.type, elems); 437 438 return tree.attribute = ac; 439 } 440 441 /** Attribute and store a semantic representation of the type annotation tree {@code tree} into 442 * the tree.attribute field. 443 * 444 * @param a the tree representing an annotation 445 * @param expectedAnnotationType the expected (super)type of the annotation 446 * @param env the current env in where the annotation instance is found 447 */ 448 public Attribute.TypeCompound attributeTypeAnnotation(JCAnnotation a, Type expectedAnnotationType, 449 Env<AttrContext> env) 450 { 451 // The attribute might have been entered if it is Target or Repeatable 452 // Because TreeCopier does not copy type, redo this if type is null 453 if (a.attribute == null || a.type == null || !(a.attribute instanceof Attribute.TypeCompound typeCompound)) { 454 // Create a new TypeCompound 455 List<Pair<MethodSymbol,Attribute>> elems = 456 attributeAnnotationValues(a, expectedAnnotationType, env); 457 458 Attribute.TypeCompound tc = 459 new Attribute.TypeCompound(a.type, elems, TypeAnnotationPosition.unknown); 460 a.attribute = tc; 461 return tc; 462 } else { 463 // Use an existing TypeCompound 464 return typeCompound; 465 } 466 } 467 468 /** 469 * Attribute annotation elements creating a list of pairs of the Symbol representing that 470 * element and the value of that element as an Attribute. */ 471 private List<Pair<MethodSymbol, Attribute>> attributeAnnotationValues(JCAnnotation a, 472 Type expected, Env<AttrContext> env) 473 { 474 // The annotation might have had its type attributed (but not 475 // checked) by attr.attribAnnotationTypes during MemberEnter, 476 // in which case we do not need to do it again. 477 Type at = (a.annotationType.type != null ? 478 a.annotationType.type : attr.attribType(a.annotationType, env)); 479 a.type = chk.checkType(a.annotationType.pos(), at, expected); 480 481 boolean isError = a.type.isErroneous(); 482 if (!a.type.tsym.isAnnotationType() && !isError) { 483 log.error(a.annotationType.pos(), Errors.NotAnnotationType(a.type)); 484 isError = true; 485 } 486 487 // List of name=value pairs (or implicit "value=" if size 1) 488 List<JCExpression> args = a.args; 489 490 boolean elidedValue = false; 491 // special case: elided "value=" assumed 492 if (args.length() == 1 && !args.head.hasTag(ASSIGN)) { 493 args.head = make.at(args.head.pos). 494 Assign(make.Ident(names.value), args.head); 495 elidedValue = true; 496 } 497 498 ListBuffer<Pair<MethodSymbol,Attribute>> buf = new ListBuffer<>(); 499 for (List<JCExpression> tl = args; tl.nonEmpty(); tl = tl.tail) { 500 Pair<MethodSymbol, Attribute> p = attributeAnnotationNameValuePair(tl.head, a.type, isError, env, elidedValue); 501 if (p != null && !p.fst.type.isErroneous()) 502 buf.append(p); 503 } 504 return buf.toList(); 505 } 506 507 // where 508 private Pair<MethodSymbol, Attribute> attributeAnnotationNameValuePair(JCExpression nameValuePair, 509 Type thisAnnotationType, boolean badAnnotation, Env<AttrContext> env, boolean elidedValue) 510 { 511 if (!nameValuePair.hasTag(ASSIGN)) { 512 log.error(nameValuePair.pos(), Errors.AnnotationValueMustBeNameValue); 513 attributeAnnotationValue(nameValuePair.type = syms.errType, nameValuePair, env); 514 return null; 515 } 516 JCAssign assign = (JCAssign)nameValuePair; 517 if (!assign.lhs.hasTag(IDENT)) { 518 log.error(nameValuePair.pos(), Errors.AnnotationValueMustBeNameValue); 519 attributeAnnotationValue(nameValuePair.type = syms.errType, nameValuePair, env); 520 return null; 521 } 522 523 // Resolve element to MethodSym 524 JCIdent left = (JCIdent)assign.lhs; 525 Symbol method = resolve.resolveQualifiedMethod(elidedValue ? assign.rhs.pos() : left.pos(), 526 env, thisAnnotationType, 527 left.name, List.nil(), null); 528 left.sym = method; 529 left.type = method.type; 530 chk.checkDeprecated(left, env.info.scope.owner, method); 531 if (method.owner != thisAnnotationType.tsym && !badAnnotation) 532 log.error(left.pos(), Errors.NoAnnotationMember(left.name, thisAnnotationType)); 533 Type resultType = method.type.getReturnType(); 534 535 // Compute value part 536 Attribute value = attributeAnnotationValue(resultType, assign.rhs, env); 537 nameValuePair.type = resultType; 538 539 return method.type.isErroneous() ? null : new Pair<>((MethodSymbol)method, value); 540 541 } 542 543 /** Attribute an annotation element value */ 544 private Attribute attributeAnnotationValue(Type expectedElementType, JCExpression tree, 545 Env<AttrContext> env) 546 { 547 //first, try completing the symbol for the annotation value - if a completion 548 //error is thrown, we should recover gracefully, and display an 549 //ordinary resolution diagnostic. 550 try { 551 expectedElementType.tsym.complete(); 552 } catch(CompletionFailure e) { 553 log.error(tree.pos(), Errors.CantResolve(Kinds.kindName(e.sym), e.sym.getQualifiedName(), null, null)); 554 expectedElementType = syms.errType; 555 } 556 557 if (expectedElementType.hasTag(ARRAY)) { 558 return getAnnotationArrayValue(expectedElementType, tree, env); 559 } 560 561 //error recovery 562 if (tree.hasTag(NEWARRAY)) { 563 if (!expectedElementType.isErroneous()) 564 log.error(tree.pos(), Errors.AnnotationValueNotAllowableType); 565 JCNewArray na = (JCNewArray)tree; 566 if (na.elemtype != null) { 567 log.error(na.elemtype.pos(), Errors.NewNotAllowedInAnnotation); 568 } 569 for (List<JCExpression> l = na.elems; l.nonEmpty(); l=l.tail) { 570 attributeAnnotationValue(syms.errType, 571 l.head, 572 env); 573 } 574 return new Attribute.Error(syms.errType); 575 } 576 577 if (expectedElementType.tsym.isAnnotationType()) { 578 if (tree.hasTag(ANNOTATION)) { 579 return attributeAnnotation((JCAnnotation)tree, expectedElementType, env); 580 } else { 581 log.error(tree.pos(), Errors.AnnotationValueMustBeAnnotation); 582 expectedElementType = syms.errType; 583 } 584 } 585 586 //error recovery 587 if (tree.hasTag(ANNOTATION)) { 588 if (!expectedElementType.isErroneous()) 589 log.error(tree.pos(), Errors.AnnotationNotValidForType(expectedElementType)); 590 attributeAnnotation((JCAnnotation)tree, syms.errType, env); 591 return new Attribute.Error(((JCAnnotation)tree).annotationType.type); 592 } 593 594 MemberEnter.InitTreeVisitor initTreeVisitor = new MemberEnter.InitTreeVisitor() { 595 // the methods below are added to allow class literals on top of constant expressions 596 @Override 597 public void visitTypeIdent(JCPrimitiveTypeTree that) {} 598 599 @Override 600 public void visitTypeArray(JCArrayTypeTree that) {} 601 }; 602 tree.accept(initTreeVisitor); 603 if (!initTreeVisitor.result) { 604 log.error(tree.pos(), Errors.ExpressionNotAllowableAsAnnotationValue); 605 return new Attribute.Error(syms.errType); 606 } 607 608 if (expectedElementType.isPrimitive() || 609 (types.isSameType(expectedElementType, syms.stringType) && !expectedElementType.hasTag(TypeTag.ERROR))) { 610 return getAnnotationPrimitiveValue(expectedElementType, tree, env); 611 } 612 613 if (expectedElementType.tsym == syms.classType.tsym) { 614 return getAnnotationClassValue(expectedElementType, tree, env); 615 } 616 617 if (expectedElementType.hasTag(CLASS) && 618 (expectedElementType.tsym.flags() & Flags.ENUM) != 0) { 619 return getAnnotationEnumValue(expectedElementType, tree, env); 620 } 621 622 //error recovery: 623 if (!expectedElementType.isErroneous()) 624 log.error(tree.pos(), Errors.AnnotationValueNotAllowableType); 625 return new Attribute.Error(attr.attribExpr(tree, env, expectedElementType)); 626 } 627 628 private Attribute getAnnotationEnumValue(Type expectedElementType, JCExpression tree, Env<AttrContext> env) { 629 Type result = attr.attribTree(tree, env, annotationValueInfo(expectedElementType)); 630 Symbol sym = TreeInfo.symbol(tree); 631 if (sym == null || 632 TreeInfo.nonstaticSelect(tree) || 633 sym.kind != VAR || 634 (sym.flags() & Flags.ENUM) == 0) { 635 log.error(tree.pos(), Errors.EnumAnnotationMustBeEnumConstant); 636 return new Attribute.Error(result.getOriginalType()); 637 } 638 VarSymbol enumerator = (VarSymbol) sym; 639 return new Attribute.Enum(expectedElementType, enumerator); 640 } 641 642 private Attribute getAnnotationClassValue(Type expectedElementType, JCExpression tree, Env<AttrContext> env) { 643 Type result = attr.attribTree(tree, env, annotationValueInfo(expectedElementType)); 644 if (result.isErroneous()) { 645 // Does it look like an unresolved class literal? 646 if (TreeInfo.name(tree) == names._class && 647 ((JCFieldAccess) tree).selected.type.isErroneous()) { 648 Name n = (((JCFieldAccess) tree).selected).type.tsym.flatName(); 649 return new Attribute.UnresolvedClass(expectedElementType, 650 types.createErrorType(n, 651 syms.unknownSymbol, syms.classType)); 652 } else { 653 return new Attribute.Error(result.getOriginalType()); 654 } 655 } 656 657 // Class literals look like field accesses of a field named class 658 // at the tree level 659 if (TreeInfo.name(tree) != names._class) { 660 log.error(tree.pos(), Errors.AnnotationValueMustBeClassLiteral); 661 return new Attribute.Error(syms.errType); 662 } 663 664 return new Attribute.Class(types, 665 (((JCFieldAccess) tree).selected).type); 666 } 667 668 private Attribute getAnnotationPrimitiveValue(Type expectedElementType, JCExpression tree, Env<AttrContext> env) { 669 Type result = attr.attribTree(tree, env, annotationValueInfo(expectedElementType)); 670 if (result.isErroneous()) 671 return new Attribute.Error(result.getOriginalType()); 672 if (result.constValue() == null) { 673 log.error(tree.pos(), Errors.AttributeValueMustBeConstant); 674 return new Attribute.Error(expectedElementType); 675 } 676 677 // Scan the annotation element value and then attribute nested annotations if present 678 if (tree.type != null && tree.type.tsym != null) { 679 queueScanTreeAndTypeAnnotate(tree, env, tree.type.tsym, tree.pos()); 680 } 681 682 result = cfolder.coerce(result, expectedElementType); 683 return new Attribute.Constant(expectedElementType, result.constValue()); 684 } 685 686 private Attr.ResultInfo annotationValueInfo(Type pt) { 687 return attr.unknownExprInfo.dup(pt, new AnnotationValueContext(attr.unknownExprInfo.checkContext)); 688 } 689 690 class AnnotationValueContext extends Check.NestedCheckContext { 691 AnnotationValueContext(CheckContext enclosingContext) { 692 super(enclosingContext); 693 } 694 695 @Override 696 public boolean compatible(Type found, Type req, Warner warn) { 697 //handle non-final implicitly-typed vars (will be rejected later on) 698 return found.hasTag(TypeTag.NONE) || super.compatible(found, req, warn); 699 } 700 } 701 702 private Attribute getAnnotationArrayValue(Type expectedElementType, JCExpression tree, Env<AttrContext> env) { 703 // Special case, implicit array 704 if (!tree.hasTag(NEWARRAY)) { 705 tree = make.at(tree.pos). 706 NewArray(null, List.nil(), List.of(tree)); 707 } 708 709 JCNewArray na = (JCNewArray)tree; 710 List<JCExpression> elems = na.elems; 711 if (na.elemtype != null) { 712 log.error(na.elemtype.pos(), Errors.NewNotAllowedInAnnotation); 713 if (elems == null) { 714 elems = List.nil(); 715 } 716 } 717 ListBuffer<Attribute> buf = new ListBuffer<>(); 718 for (List<JCExpression> l = elems; l.nonEmpty(); l = l.tail) { 719 buf.append(attributeAnnotationValue(types.elemtype(expectedElementType), 720 l.head, 721 env)); 722 } 723 na.type = expectedElementType; 724 return new Attribute. 725 Array(expectedElementType, buf.toArray(new Attribute[buf.length()])); 726 } 727 728 /* ********************************* 729 * Support for repeating annotations 730 ***********************************/ 731 732 /** 733 * This context contains all the information needed to synthesize new 734 * annotations trees for repeating annotations. 735 */ 736 private class AnnotationContext<T extends Attribute.Compound> { 737 public final Env<AttrContext> env; 738 public final Map<Symbol.TypeSymbol, ListBuffer<T>> annotated; 739 public final Map<T, JCDiagnostic.DiagnosticPosition> pos; 740 public final boolean isTypeCompound; 741 742 public AnnotationContext(Env<AttrContext> env, 743 Map<Symbol.TypeSymbol, ListBuffer<T>> annotated, 744 Map<T, JCDiagnostic.DiagnosticPosition> pos, 745 boolean isTypeCompound) { 746 Assert.checkNonNull(env); 747 Assert.checkNonNull(annotated); 748 Assert.checkNonNull(pos); 749 750 this.env = env; 751 this.annotated = annotated; 752 this.pos = pos; 753 this.isTypeCompound = isTypeCompound; 754 } 755 } 756 757 /* Process repeated annotations. This method returns the 758 * synthesized container annotation or null IFF all repeating 759 * annotation are invalid. This method reports errors/warnings. 760 */ 761 private <T extends Attribute.Compound> T processRepeatedAnnotations(List<T> annotations, 762 AnnotationContext<T> ctx, Symbol on, boolean isTypeParam) 763 { 764 T firstOccurrence = annotations.head; 765 List<Attribute> repeated = List.nil(); 766 Type origAnnoType = null; 767 Type arrayOfOrigAnnoType = null; 768 Type targetContainerType = null; 769 MethodSymbol containerValueSymbol = null; 770 771 Assert.check(!annotations.isEmpty() && !annotations.tail.isEmpty()); // i.e. size() > 1 772 773 int count = 0; 774 for (List<T> al = annotations; !al.isEmpty(); al = al.tail) { 775 count++; 776 777 // There must be more than a single anno in the annotation list 778 Assert.check(count > 1 || !al.tail.isEmpty()); 779 780 T currentAnno = al.head; 781 782 origAnnoType = currentAnno.type; 783 if (arrayOfOrigAnnoType == null) { 784 arrayOfOrigAnnoType = types.makeArrayType(origAnnoType); 785 } 786 787 // Only report errors if this isn't the first occurrence I.E. count > 1 788 boolean reportError = count > 1; 789 Type currentContainerType = getContainingType(currentAnno, ctx.pos.get(currentAnno), reportError); 790 if (currentContainerType == null) { 791 continue; 792 } 793 // Assert that the target Container is == for all repeated 794 // annos of the same annotation type, the types should 795 // come from the same Symbol, i.e. be '==' 796 Assert.check(targetContainerType == null || currentContainerType == targetContainerType); 797 targetContainerType = currentContainerType; 798 799 containerValueSymbol = validateContainer(targetContainerType, origAnnoType, ctx.pos.get(currentAnno)); 800 801 if (containerValueSymbol == null) { // Check of CA type failed 802 // errors are already reported 803 continue; 804 } 805 806 repeated = repeated.prepend(currentAnno); 807 } 808 809 if (!repeated.isEmpty() && targetContainerType == null) { 810 log.error(ctx.pos.get(annotations.head), Errors.DuplicateAnnotationInvalidRepeated(origAnnoType)); 811 return null; 812 } 813 814 if (!repeated.isEmpty()) { 815 repeated = repeated.reverse(); 816 DiagnosticPosition pos = ctx.pos.get(firstOccurrence); 817 TreeMaker m = make.at(pos); 818 Pair<MethodSymbol, Attribute> p = 819 new Pair<MethodSymbol, Attribute>(containerValueSymbol, 820 new Attribute.Array(arrayOfOrigAnnoType, repeated)); 821 if (ctx.isTypeCompound) { 822 /* TODO: the following code would be cleaner: 823 Attribute.TypeCompound at = new Attribute.TypeCompound(targetContainerType, List.of(p), 824 ((Attribute.TypeCompound)annotations.head).position); 825 JCTypeAnnotation annoTree = m.TypeAnnotation(at); 826 at = attributeTypeAnnotation(annoTree, targetContainerType, ctx.env); 827 */ 828 // However, we directly construct the TypeCompound to keep the 829 // direct relation to the contained TypeCompounds. 830 Attribute.TypeCompound at = new Attribute.TypeCompound(targetContainerType, List.of(p), 831 ((Attribute.TypeCompound)annotations.head).position); 832 833 JCAnnotation annoTree = m.TypeAnnotation(at); 834 if (!chk.validateAnnotationDeferErrors(annoTree)) 835 log.error(annoTree.pos(), Errors.DuplicateAnnotationInvalidRepeated(origAnnoType)); 836 837 if (!chk.isTypeAnnotation(annoTree, isTypeParam)) { 838 log.error(pos, isTypeParam ? Errors.InvalidRepeatableAnnotationNotApplicable(targetContainerType, on) 839 : Errors.InvalidRepeatableAnnotationNotApplicableInContext(targetContainerType)); 840 } 841 842 at.setSynthesized(true); 843 844 @SuppressWarnings("unchecked") 845 T x = (T) at; 846 return x; 847 } else { 848 Attribute.Compound c = new Attribute.Compound(targetContainerType, List.of(p)); 849 JCAnnotation annoTree = m.Annotation(c); 850 851 boolean isRecordMember = (on.flags_field & Flags.RECORD) != 0 || on.enclClass() != null && on.enclClass().isRecord(); 852 /* if it is a record member we will not issue the error now and wait until annotations on records are 853 * checked at Check::validateAnnotation, which will issue it 854 */ 855 if (!chk.annotationApplicable(annoTree, on) && (!isRecordMember || isRecordMember && (on.flags_field & Flags.GENERATED_MEMBER) == 0)) { 856 log.error(annoTree.pos(), 857 Errors.InvalidRepeatableAnnotationNotApplicable(targetContainerType, on)); 858 } 859 860 if (!chk.validateAnnotationDeferErrors(annoTree)) 861 log.error(annoTree.pos(), Errors.DuplicateAnnotationInvalidRepeated(origAnnoType)); 862 863 c = attributeAnnotation(annoTree, targetContainerType, ctx.env); 864 c.setSynthesized(true); 865 866 @SuppressWarnings("unchecked") 867 T x = (T) c; 868 return x; 869 } 870 } else { 871 return null; // errors should have been reported elsewhere 872 } 873 } 874 875 /** 876 * Fetches the actual Type that should be the containing annotation. 877 */ 878 private Type getContainingType(Attribute.Compound currentAnno, 879 DiagnosticPosition pos, 880 boolean reportError) 881 { 882 Type origAnnoType = currentAnno.type; 883 TypeSymbol origAnnoDecl = origAnnoType.tsym; 884 885 // Fetch the Repeatable annotation from the current 886 // annotation's declaration, or null if it has none 887 Attribute.Compound ca = origAnnoDecl.getAnnotationTypeMetadata().getRepeatable(); 888 if (ca == null) { // has no Repeatable annotation 889 if (reportError) 890 log.error(pos, Errors.DuplicateAnnotationMissingContainer(origAnnoType)); 891 return null; 892 } 893 894 return filterSame(extractContainingType(ca, pos, origAnnoDecl), 895 origAnnoType); 896 } 897 898 // returns null if t is same as 's', returns 't' otherwise 899 private Type filterSame(Type t, Type s) { 900 if (t == null || s == null) { 901 return t; 902 } 903 904 return types.isSameType(t, s) ? null : t; 905 } 906 907 /** Extract the actual Type to be used for a containing annotation. */ 908 private Type extractContainingType(Attribute.Compound ca, 909 DiagnosticPosition pos, 910 TypeSymbol annoDecl) 911 { 912 // The next three checks check that the Repeatable annotation 913 // on the declaration of the annotation type that is repeating is 914 // valid. 915 916 // Repeatable must have at least one element 917 if (ca.values.isEmpty()) { 918 log.error(pos, Errors.InvalidRepeatableAnnotation(annoDecl)); 919 return null; 920 } 921 Pair<MethodSymbol,Attribute> p = ca.values.head; 922 Name name = p.fst.name; 923 if (name != names.value) { // should contain only one element, named "value" 924 log.error(pos, Errors.InvalidRepeatableAnnotation(annoDecl)); 925 return null; 926 } 927 if (!(p.snd instanceof Attribute.Class attributeClass)) { // check that the value of "value" is an Attribute.Class 928 log.error(pos, Errors.InvalidRepeatableAnnotation(annoDecl)); 929 return null; 930 } 931 932 return attributeClass.getValue(); 933 } 934 935 /* Validate that the suggested targetContainerType Type is a valid 936 * container type for repeated instances of originalAnnoType 937 * annotations. Return null and report errors if this is not the 938 * case, return the MethodSymbol of the value element in 939 * targetContainerType if it is suitable (this is needed to 940 * synthesize the container). */ 941 private MethodSymbol validateContainer(Type targetContainerType, 942 Type originalAnnoType, 943 DiagnosticPosition pos) { 944 MethodSymbol containerValueSymbol = null; 945 boolean fatalError = false; 946 947 // Validate that there is a (and only 1) value method 948 Scope scope = targetContainerType.tsym.members(); 949 int nr_value_elems = 0; 950 boolean error = false; 951 for(Symbol elm : scope.getSymbolsByName(names.value)) { 952 nr_value_elems++; 953 954 if (nr_value_elems == 1 && 955 elm.kind == MTH) { 956 containerValueSymbol = (MethodSymbol)elm; 957 } else { 958 error = true; 959 } 960 } 961 if (error) { 962 log.error(pos, 963 Errors.InvalidRepeatableAnnotationMultipleValues(targetContainerType, 964 nr_value_elems)); 965 return null; 966 } else if (nr_value_elems == 0) { 967 log.error(pos, 968 Errors.InvalidRepeatableAnnotationNoValue(targetContainerType)); 969 return null; 970 } 971 972 // validate that the 'value' element is a method 973 // probably "impossible" to fail this 974 if (containerValueSymbol.kind != MTH) { 975 log.error(pos, 976 Errors.InvalidRepeatableAnnotationInvalidValue(targetContainerType)); 977 fatalError = true; 978 } 979 980 // validate that the 'value' element has the correct return type 981 // i.e. array of original anno 982 Type valueRetType = containerValueSymbol.type.getReturnType(); 983 Type expectedType = types.makeArrayType(originalAnnoType); 984 if (!(types.isArray(valueRetType) && 985 types.isSameType(expectedType, valueRetType))) { 986 log.error(pos, 987 Errors.InvalidRepeatableAnnotationValueReturn(targetContainerType, 988 valueRetType, 989 expectedType)); 990 fatalError = true; 991 } 992 993 return fatalError ? null : containerValueSymbol; 994 } 995 996 private <T extends Attribute.Compound> T makeContainerAnnotation(List<T> toBeReplaced, 997 AnnotationContext<T> ctx, Symbol sym, boolean isTypeParam) 998 { 999 // Process repeated annotations 1000 T validRepeated = 1001 processRepeatedAnnotations(toBeReplaced, ctx, sym, isTypeParam); 1002 1003 if (validRepeated != null) { 1004 // Check that the container isn't manually 1005 // present along with repeated instances of 1006 // its contained annotation. 1007 ListBuffer<T> manualContainer = ctx.annotated.get(validRepeated.type.tsym); 1008 if (manualContainer != null) { 1009 log.error(ctx.pos.get(manualContainer.first()), 1010 Errors.InvalidRepeatableAnnotationRepeatedAndContainerPresent(manualContainer.first().type.tsym)); 1011 } 1012 } 1013 1014 // A null return will delete the Placeholder 1015 return validRepeated; 1016 } 1017 1018 /******************** 1019 * Type annotations * 1020 ********************/ 1021 1022 /** 1023 * Attribute the list of annotations and enter them onto s. 1024 */ 1025 public void enterTypeAnnotations(List<JCAnnotation> annotations, Env<AttrContext> env, 1026 Symbol s, DiagnosticPosition deferPos, boolean isTypeParam) 1027 { 1028 Assert.checkNonNull(s, "Symbol argument to actualEnterTypeAnnotations is nul/"); 1029 JavaFileObject prev = log.useSource(env.toplevel.sourcefile); 1030 DiagnosticPosition prevLintPos = null; 1031 1032 if (deferPos != null) { 1033 prevLintPos = deferredLintHandler.setPos(deferPos); 1034 } 1035 try { 1036 annotateNow(s, annotations, env, true, isTypeParam); 1037 } finally { 1038 if (prevLintPos != null) 1039 deferredLintHandler.setPos(prevLintPos); 1040 log.useSource(prev); 1041 } 1042 } 1043 1044 /** 1045 * Enqueue tree for scanning of type annotations, attaching to the Symbol sym. 1046 */ 1047 public void queueScanTreeAndTypeAnnotate(JCTree tree, Env<AttrContext> env, Symbol sym, 1048 DiagnosticPosition deferPos) 1049 { 1050 Assert.checkNonNull(sym); 1051 normal(() -> tree.accept(new TypeAnnotate(env, sym, deferPos))); 1052 } 1053 1054 /** 1055 * Apply the annotations to the particular type. 1056 */ 1057 public void annotateTypeSecondStage(JCTree tree, List<JCAnnotation> annotations, Type storeAt) { 1058 typeAnnotation(() -> { 1059 List<Attribute.TypeCompound> compounds = fromAnnotations(annotations); 1060 Assert.check(annotations.size() == compounds.size()); 1061 // the type already has annotation metadata, but it's empty 1062 Annotations metadata = storeAt.getMetadata(Annotations.class); 1063 Assert.checkNonNull(metadata); 1064 Assert.check(metadata.annotationBuffer().isEmpty()); 1065 metadata.annotationBuffer().appendList(compounds); 1066 }); 1067 } 1068 1069 /** 1070 * Apply the annotations to the particular type. 1071 */ 1072 public void annotateTypeParameterSecondStage(JCTree tree, List<JCAnnotation> annotations) { 1073 typeAnnotation(() -> { 1074 List<Attribute.TypeCompound> compounds = fromAnnotations(annotations); 1075 Assert.check(annotations.size() == compounds.size()); 1076 }); 1077 } 1078 1079 /** 1080 * We need to use a TreeScanner, because it is not enough to visit the top-level 1081 * annotations. We also need to visit type arguments, etc. 1082 */ 1083 private class TypeAnnotate extends TreeScanner { 1084 private final Env<AttrContext> env; 1085 private final Symbol sym; 1086 private DiagnosticPosition deferPos; 1087 1088 public TypeAnnotate(Env<AttrContext> env, Symbol sym, DiagnosticPosition deferPos) { 1089 1090 this.env = env; 1091 this.sym = sym; 1092 this.deferPos = deferPos; 1093 } 1094 1095 @Override 1096 public void visitAnnotatedType(JCAnnotatedType tree) { 1097 enterTypeAnnotations(tree.annotations, env, sym, deferPos, false); 1098 scan(tree.underlyingType); 1099 } 1100 1101 @Override 1102 public void visitTypeParameter(JCTypeParameter tree) { 1103 enterTypeAnnotations(tree.annotations, env, sym, deferPos, true); 1104 scan(tree.bounds); 1105 } 1106 1107 @Override 1108 public void visitNewArray(JCNewArray tree) { 1109 enterTypeAnnotations(tree.annotations, env, sym, deferPos, false); 1110 for (List<JCAnnotation> dimAnnos : tree.dimAnnotations) 1111 enterTypeAnnotations(dimAnnos, env, sym, deferPos, false); 1112 scan(tree.elemtype); 1113 scan(tree.elems); 1114 } 1115 1116 @Override 1117 public void visitMethodDef(JCMethodDecl tree) { 1118 scan(tree.mods); 1119 scan(tree.restype); 1120 scan(tree.typarams); 1121 scan(tree.recvparam); 1122 scan(tree.params); 1123 scan(tree.thrown); 1124 scan(tree.defaultValue); 1125 // Do not annotate the body, just the signature. 1126 } 1127 1128 @Override 1129 public void visitVarDef(JCVariableDecl tree) { 1130 DiagnosticPosition prevPos = deferPos; 1131 deferPos = tree.pos(); 1132 try { 1133 if (sym != null && sym.kind == VAR) { 1134 // Don't visit a parameter once when the sym is the method 1135 // and once when the sym is the parameter. 1136 scan(tree.mods); 1137 scan(tree.vartype); 1138 } 1139 scan(tree.init); 1140 } finally { 1141 deferPos = prevPos; 1142 } 1143 } 1144 1145 @Override 1146 public void visitBindingPattern(JCTree.JCBindingPattern tree) { 1147 //type binding pattern's type will be annotated separately, avoid 1148 //adding its annotations into the owning method here (would clash 1149 //with repeatable annotations). 1150 } 1151 1152 @Override 1153 public void visitClassDef(JCClassDecl tree) { 1154 // We can only hit a classdef if it is declared within 1155 // a method. Ignore it - the class will be visited 1156 // separately later. 1157 } 1158 1159 @Override 1160 public void visitNewClass(JCNewClass tree) { 1161 scan(tree.encl); 1162 scan(tree.typeargs); 1163 if (tree.def == null) { 1164 scan(tree.clazz); 1165 } 1166 scan(tree.args); 1167 // the anonymous class instantiation if any will be visited separately. 1168 } 1169 } 1170 1171 /********************* 1172 * Completer support * 1173 *********************/ 1174 1175 private AnnotationTypeCompleter theSourceCompleter = new AnnotationTypeCompleter() { 1176 @Override 1177 public void complete(ClassSymbol sym) throws CompletionFailure { 1178 Env<AttrContext> context = typeEnvs.get(sym); 1179 Annotate.this.attributeAnnotationType(context); 1180 } 1181 }; 1182 1183 /* Last stage completer to enter just enough annotations to have a prototype annotation type. 1184 * This currently means entering @Target and @Repeatable. 1185 */ 1186 public AnnotationTypeCompleter annotationTypeSourceCompleter() { 1187 return theSourceCompleter; 1188 } 1189 1190 private void attributeAnnotationType(Env<AttrContext> env) { 1191 Assert.check(((JCClassDecl)env.tree).sym.isAnnotationType(), 1192 "Trying to annotation type complete a non-annotation type"); 1193 1194 JavaFileObject prev = log.useSource(env.toplevel.sourcefile); 1195 try { 1196 JCClassDecl tree = (JCClassDecl)env.tree; 1197 AnnotationTypeVisitor v = new AnnotationTypeVisitor(attr, chk, syms, typeEnvs); 1198 v.scanAnnotationType(tree); 1199 tree.sym.getAnnotationTypeMetadata().setRepeatable(v.repeatable); 1200 tree.sym.getAnnotationTypeMetadata().setTarget(v.target); 1201 } finally { 1202 log.useSource(prev); 1203 } 1204 } 1205 1206 public Attribute unfinishedDefaultValue() { 1207 return theUnfinishedDefaultValue; 1208 } 1209 1210 public static interface AnnotationTypeCompleter { 1211 void complete(ClassSymbol sym) throws CompletionFailure; 1212 } 1213 1214 /** Visitor to determine a prototype annotation type for a class declaring an annotation type. 1215 * 1216 * <p><b>This is NOT part of any supported API. 1217 * If you write code that depends on this, you do so at your own risk. 1218 * This code and its internal interfaces are subject to change or 1219 * deletion without notice.</b> 1220 */ 1221 public class AnnotationTypeVisitor extends TreeScanner { 1222 private Env<AttrContext> env; 1223 1224 private final Attr attr; 1225 private final Check check; 1226 private final Symtab tab; 1227 private final TypeEnvs typeEnvs; 1228 1229 private Compound target; 1230 private Compound repeatable; 1231 1232 public AnnotationTypeVisitor(Attr attr, Check check, Symtab tab, TypeEnvs typeEnvs) { 1233 this.attr = attr; 1234 this.check = check; 1235 this.tab = tab; 1236 this.typeEnvs = typeEnvs; 1237 } 1238 1239 public Compound getRepeatable() { 1240 return repeatable; 1241 } 1242 1243 public Compound getTarget() { 1244 return target; 1245 } 1246 1247 public void scanAnnotationType(JCClassDecl decl) { 1248 visitClassDef(decl); 1249 } 1250 1251 @Override 1252 public void visitClassDef(JCClassDecl tree) { 1253 Env<AttrContext> prevEnv = env; 1254 env = typeEnvs.get(tree.sym); 1255 try { 1256 scan(tree.mods); // look for repeatable and target 1257 // don't descend into body 1258 } finally { 1259 env = prevEnv; 1260 } 1261 } 1262 1263 @Override 1264 public void visitAnnotation(JCAnnotation tree) { 1265 Type t = tree.annotationType.type; 1266 if (t == null) { 1267 t = attr.attribType(tree.annotationType, env); 1268 tree.annotationType.type = t = check.checkType(tree.annotationType.pos(), t, tab.annotationType); 1269 } 1270 1271 if (t == tab.annotationTargetType) { 1272 target = Annotate.this.attributeAnnotation(tree, tab.annotationTargetType, env); 1273 } else if (t == tab.repeatableType) { 1274 repeatable = Annotate.this.attributeAnnotation(tree, tab.repeatableType, env); 1275 } 1276 } 1277 } 1278 1279 /** Represents the semantics of an Annotation Type. 1280 * 1281 * <p><b>This is NOT part of any supported API. 1282 * If you write code that depends on this, you do so at your own risk. 1283 * This code and its internal interfaces are subject to change or 1284 * deletion without notice.</b> 1285 */ 1286 public static class AnnotationTypeMetadata { 1287 final ClassSymbol metaDataFor; 1288 private Compound target; 1289 private Compound repeatable; 1290 private AnnotationTypeCompleter annotationTypeCompleter; 1291 1292 public AnnotationTypeMetadata(ClassSymbol metaDataFor, AnnotationTypeCompleter annotationTypeCompleter) { 1293 this.metaDataFor = metaDataFor; 1294 this.annotationTypeCompleter = annotationTypeCompleter; 1295 } 1296 1297 private void init() { 1298 // Make sure metaDataFor is member entered 1299 while (!metaDataFor.isCompleted()) 1300 metaDataFor.complete(); 1301 1302 if (annotationTypeCompleter != null) { 1303 AnnotationTypeCompleter c = annotationTypeCompleter; 1304 annotationTypeCompleter = null; 1305 c.complete(metaDataFor); 1306 } 1307 } 1308 1309 public void complete() { 1310 init(); 1311 } 1312 1313 public Compound getRepeatable() { 1314 init(); 1315 return repeatable; 1316 } 1317 1318 public void setRepeatable(Compound repeatable) { 1319 Assert.checkNull(this.repeatable); 1320 this.repeatable = repeatable; 1321 } 1322 1323 public Compound getTarget() { 1324 init(); 1325 return target; 1326 } 1327 1328 public void setTarget(Compound target) { 1329 Assert.checkNull(this.target); 1330 this.target = target; 1331 } 1332 1333 public Set<MethodSymbol> getAnnotationElements() { 1334 init(); 1335 Set<MethodSymbol> members = new LinkedHashSet<>(); 1336 WriteableScope s = metaDataFor.members(); 1337 Iterable<Symbol> ss = s.getSymbols(NON_RECURSIVE); 1338 for (Symbol sym : ss) 1339 if (sym.kind == MTH && 1340 sym.name != sym.name.table.names.clinit && 1341 (sym.flags() & SYNTHETIC) == 0) 1342 members.add((MethodSymbol)sym); 1343 return members; 1344 } 1345 1346 public Set<MethodSymbol> getAnnotationElementsWithDefault() { 1347 init(); 1348 Set<MethodSymbol> members = getAnnotationElements(); 1349 Set<MethodSymbol> res = new LinkedHashSet<>(); 1350 for (MethodSymbol m : members) 1351 if (m.defaultValue != null) 1352 res.add(m); 1353 return res; 1354 } 1355 1356 @Override 1357 public String toString() { 1358 return "Annotation type for: " + metaDataFor; 1359 } 1360 1361 public boolean isMetadataForAnnotationType() { return true; } 1362 1363 public static AnnotationTypeMetadata notAnAnnotationType() { 1364 return NOT_AN_ANNOTATION_TYPE; 1365 } 1366 1367 private static final AnnotationTypeMetadata NOT_AN_ANNOTATION_TYPE = 1368 new AnnotationTypeMetadata(null, null) { 1369 @Override 1370 public void complete() { 1371 } // do nothing 1372 1373 @Override 1374 public String toString() { 1375 return "Not an annotation type"; 1376 } 1377 1378 @Override 1379 public Set<MethodSymbol> getAnnotationElements() { 1380 return new LinkedHashSet<>(0); 1381 } 1382 1383 @Override 1384 public Set<MethodSymbol> getAnnotationElementsWithDefault() { 1385 return new LinkedHashSet<>(0); 1386 } 1387 1388 @Override 1389 public boolean isMetadataForAnnotationType() { 1390 return false; 1391 } 1392 1393 @Override 1394 public Compound getTarget() { 1395 return null; 1396 } 1397 1398 @Override 1399 public Compound getRepeatable() { 1400 return null; 1401 } 1402 }; 1403 } 1404 1405 public void newRound() { 1406 blockCount = 1; 1407 } 1408 1409 public Queues setQueues(Queues nue) { 1410 Queues stored = new Queues(q, validateQ, typesQ, afterTypesQ); 1411 this.q = nue.q; 1412 this.typesQ = nue.typesQ; 1413 this.afterTypesQ = nue.afterTypesQ; 1414 this.validateQ = nue.validateQ; 1415 return stored; 1416 } 1417 1418 static class Queues { 1419 private final ListBuffer<Runnable> q; 1420 private final ListBuffer<Runnable> validateQ; 1421 private final ListBuffer<Runnable> typesQ; 1422 private final ListBuffer<Runnable> afterTypesQ; 1423 1424 public Queues() { 1425 this(new ListBuffer<Runnable>(), new ListBuffer<Runnable>(), new ListBuffer<Runnable>(), new ListBuffer<Runnable>()); 1426 } 1427 1428 public Queues(ListBuffer<Runnable> q, ListBuffer<Runnable> validateQ, ListBuffer<Runnable> typesQ, ListBuffer<Runnable> afterTypesQ) { 1429 this.q = q; 1430 this.validateQ = validateQ; 1431 this.typesQ = typesQ; 1432 this.afterTypesQ = afterTypesQ; 1433 } 1434 } 1435 }