108 public static final int ANNOTATION = 1<<13;
109
110 /** An enumeration type or an enumeration constant, added in
111 * classfile v49.0. */
112 @Use({FlagTarget.CLASS, FlagTarget.VARIABLE})
113 public static final int ENUM = 1<<14;
114
115 /** Added in SE8, represents constructs implicitly declared in source. */
116 @Use({FlagTarget.MODULE, FlagTarget.VARIABLE})
117 public static final int MANDATED = 1<<15;
118
119 @NotFlag
120 public static final int StandardFlags = 0x0fff;
121
122 // Because the following access flags are overloaded with other
123 // bit positions, we translate them when reading and writing class
124 // files into unique bits positions: ACC_SYNTHETIC <-> SYNTHETIC,
125 // for example.
126 @Use({FlagTarget.CLASS})
127 @NoToStringValue
128 public static final int ACC_SUPER = 1<<5;
129 @Use({FlagTarget.METHOD})
130 @NoToStringValue
131 public static final int ACC_BRIDGE = 1<<6;
132 @Use({FlagTarget.METHOD})
133 @NoToStringValue
134 public static final int ACC_VARARGS = 1<<7;
135 @Use({FlagTarget.CLASS})
136 @NoToStringValue
137 public static final int ACC_MODULE = 1<<15;
138
139 /* ***************************************
140 * Internal compiler flags (no bits in the lower 16).
141 *****************************************/
142
143 /** Flag is set if symbol is deprecated. See also DEPRECATED_REMOVAL.
144 */
145 @Use({FlagTarget.CLASS, FlagTarget.METHOD, FlagTarget.MODULE, FlagTarget.PACKAGE, FlagTarget.TYPE_VAR, FlagTarget.VARIABLE})
146 public static final int DEPRECATED = 1<<17;
147
148 /** Flag is set for a variable symbol if the variable's definition
149 * has an initializer part.
150 */
151 @Use({FlagTarget.VARIABLE})
152 public static final int HASINIT = 1<<18;
153
154 /** Class is an implicitly declared top level class.
155 */
156 @Use({FlagTarget.CLASS})
157 public static final int IMPLICIT_CLASS = 1<<19;
158
159 /** Variable with implicit/inferred type.
160 */
161 @Use(FlagTarget.VARIABLE)
162 public static final int VAR_VARIABLE = 1<<19;
163
164 /** Flag is set for compiler-generated anonymous method symbols
165 * that `own' an initializer block.
166 */
167 @Use({FlagTarget.METHOD})
168 public static final int BLOCK = 1<<20;
169
170 /** A parameter of a lambda function.
171 */
172 @Use(FlagTarget.VARIABLE)
173 public static final int LAMBDA_PARAMETER = 1<<20;
174
175 /** Flag is set for ClassSymbols that are being compiled from source.
176 */
177 @Use({FlagTarget.CLASS})
178 public static final int FROM_SOURCE = 1<<21;
179
180 /** Flag is set for nested classes that do not access instance members
181 * or `this' of an outer class and therefore don't need to be passed
182 * a this$n reference. This value is currently set only for anonymous
183 * classes in superclass constructor calls.
184 * todo: use this value for optimizing away this$n parameters in
185 * other cases.
186 */
187 @Use({FlagTarget.CLASS, FlagTarget.VARIABLE})
188 public static final int NOOUTERTHIS = 1<<22;
189
190 /** Flag is set for package symbols if a package has a member or
191 * directory and therefore exists.
192 */
193 @Use({FlagTarget.CLASS, FlagTarget.PACKAGE})
353 public static final long SEALED = 1L<<48; // part of ExtendedStandardFlags, cannot be reused
354
355 /**
356 * Flag that marks a synthetic method body for a lambda expression
357 */
358 @Use({FlagTarget.METHOD})
359 public static final long LAMBDA_METHOD = 1L<<49;
360
361 /**
362 * Flag that marks a synthetic local capture field in a local/anon class
363 */
364 @Use({FlagTarget.VARIABLE})
365 public static final long LOCAL_CAPTURE_FIELD = 1L<<49;
366
367 /**
368 * Flag to control recursion in TransTypes
369 */
370 @Use({FlagTarget.CLASS})
371 public static final long TYPE_TRANSLATED = 1L<<50;
372
373 /**
374 * Flag to indicate class symbol is for module-info
375 */
376 @Use({FlagTarget.CLASS})
377 public static final long MODULE = 1L<<51;
378
379 /**
380 * Flag to indicate the given ModuleSymbol is an automatic module.
381 */
382 @Use({FlagTarget.MODULE})
383 public static final long AUTOMATIC_MODULE = 1L<<52;
384
385 /**
386 * Flag to indicate the given PackageSymbol contains any non-.java and non-.class resources.
387 */
388 @Use({FlagTarget.PACKAGE})
389 public static final long HAS_RESOURCE = 1L<<52;
390
391 /**
392 * Flag to indicate the given ParamSymbol has a user-friendly name filled.
488
489 /**
490 * Flag to indicate parameters that require identity.
491 */
492 @Use({FlagTarget.VARIABLE}) //ParamSymbols only
493 public static final long REQUIRES_IDENTITY = 1L<<62;
494
495 /**
496 * Flag to indicate type annotations have been queued for field initializers.
497 */
498 @Use({FlagTarget.VARIABLE})
499 public static final long FIELD_INIT_TYPE_ANNOTATIONS_QUEUED = 1L<<53;
500
501 /**
502 * Flag to indicate that the class/interface was declared with the non-sealed modifier.
503 */
504 @Use({FlagTarget.CLASS})
505 @CustomToStringValue("non-sealed")
506 public static final long NON_SEALED = 1L<<63; // part of ExtendedStandardFlags, cannot be reused
507
508 /**
509 * Describe modifier flags as they might appear in source code, i.e.,
510 * separated by spaces and in the order suggested by JLS 8.1.1.
511 */
512 public static String toSource(long flags) {
513 return asModifierSet(flags).stream()
514 .map(Modifier::toString)
515 .collect(Collectors.joining(" "));
516 }
517
518 /** Modifier masks.
519 */
520 @NotFlag
521 public static final int
522 AccessFlags = PUBLIC | PROTECTED | PRIVATE,
523 LocalClassFlags = FINAL | ABSTRACT | STRICTFP | ENUM | SYNTHETIC,
524 StaticLocalFlags = LocalClassFlags | STATIC | INTERFACE,
525 MemberClassFlags = LocalClassFlags | INTERFACE | AccessFlags,
526 MemberStaticClassFlags = MemberClassFlags | STATIC,
527 ClassFlags = LocalClassFlags | INTERFACE | PUBLIC | ANNOTATION,
528 InterfaceVarFlags = FINAL | STATIC | PUBLIC,
529 VarFlags = AccessFlags | FINAL | STATIC |
530 VOLATILE | TRANSIENT | ENUM,
531 ConstructorFlags = AccessFlags,
532 InterfaceMethodFlags = ABSTRACT | PUBLIC,
533 MethodFlags = AccessFlags | ABSTRACT | STATIC | NATIVE |
534 SYNCHRONIZED | FINAL | STRICTFP,
535 RecordMethodFlags = AccessFlags | ABSTRACT | STATIC |
536 SYNCHRONIZED | FINAL | STRICTFP;
537 @NotFlag
538 public static final long
539 //NOTE: flags in ExtendedStandardFlags cannot be overlayed across Symbol kinds:
540 ExtendedStandardFlags = (long)StandardFlags | DEFAULT | SEALED | NON_SEALED,
541 ExtendedMemberClassFlags = (long)MemberClassFlags | SEALED | NON_SEALED,
542 ExtendedMemberStaticClassFlags = (long) MemberStaticClassFlags | SEALED | NON_SEALED,
543 ExtendedClassFlags = (long)ClassFlags | SEALED | NON_SEALED,
544 ModifierFlags = ((long)StandardFlags & ~INTERFACE) | DEFAULT | SEALED | NON_SEALED,
545 InterfaceMethodMask = ABSTRACT | PRIVATE | STATIC | PUBLIC | STRICTFP | DEFAULT,
546 AnnotationTypeElementMask = ABSTRACT | PUBLIC,
547 LocalVarFlags = FINAL | PARAMETER,
548 ReceiverParamFlags = PARAMETER;
549
550 public static Set<Modifier> asModifierSet(long flags) {
551 Set<Modifier> modifiers = modifierSets.get(flags);
552 if (modifiers == null) {
553 modifiers = java.util.EnumSet.noneOf(Modifier.class);
554 if (0 != (flags & PUBLIC)) modifiers.add(Modifier.PUBLIC);
555 if (0 != (flags & PROTECTED)) modifiers.add(Modifier.PROTECTED);
556 if (0 != (flags & PRIVATE)) modifiers.add(Modifier.PRIVATE);
557 if (0 != (flags & ABSTRACT)) modifiers.add(Modifier.ABSTRACT);
558 if (0 != (flags & STATIC)) modifiers.add(Modifier.STATIC);
559 if (0 != (flags & SEALED)) modifiers.add(Modifier.SEALED);
560 if (0 != (flags & NON_SEALED))
561 modifiers.add(Modifier.NON_SEALED);
562 if (0 != (flags & FINAL)) modifiers.add(Modifier.FINAL);
563 if (0 != (flags & TRANSIENT)) modifiers.add(Modifier.TRANSIENT);
564 if (0 != (flags & VOLATILE)) modifiers.add(Modifier.VOLATILE);
565 if (0 != (flags & SYNCHRONIZED))
566 modifiers.add(Modifier.SYNCHRONIZED);
567 if (0 != (flags & NATIVE)) modifiers.add(Modifier.NATIVE);
568 if (0 != (flags & STRICTFP)) modifiers.add(Modifier.STRICTFP);
569 if (0 != (flags & DEFAULT)) modifiers.add(Modifier.DEFAULT);
570 modifiers = Collections.unmodifiableSet(modifiers);
571 modifierSets.put(flags, modifiers);
572 }
573 return modifiers;
574 }
575
576 // Cache of modifier sets.
577 private static final Map<Long, Set<Modifier>> modifierSets = new ConcurrentHashMap<>(64);
578
579 public static boolean isStatic(Symbol symbol) {
580 return (symbol.flags() & STATIC) != 0;
581 }
582
583 public static boolean isEnum(Symbol symbol) {
584 return (symbol.flags() & ENUM) != 0;
585 }
586
587 public static boolean isConstant(Symbol.VarSymbol symbol) {
588 return symbol.getConstValue() != null;
589 }
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108 public static final int ANNOTATION = 1<<13;
109
110 /** An enumeration type or an enumeration constant, added in
111 * classfile v49.0. */
112 @Use({FlagTarget.CLASS, FlagTarget.VARIABLE})
113 public static final int ENUM = 1<<14;
114
115 /** Added in SE8, represents constructs implicitly declared in source. */
116 @Use({FlagTarget.MODULE, FlagTarget.VARIABLE})
117 public static final int MANDATED = 1<<15;
118
119 @NotFlag
120 public static final int StandardFlags = 0x0fff;
121
122 // Because the following access flags are overloaded with other
123 // bit positions, we translate them when reading and writing class
124 // files into unique bits positions: ACC_SYNTHETIC <-> SYNTHETIC,
125 // for example.
126 @Use({FlagTarget.CLASS})
127 @NoToStringValue
128 public static final int ACC_IDENTITY = 1<<5;
129 @Use({FlagTarget.METHOD})
130 @NoToStringValue
131 public static final int ACC_BRIDGE = 1<<6;
132 @Use({FlagTarget.METHOD})
133 @NoToStringValue
134 public static final int ACC_VARARGS = 1<<7;
135 @Use({FlagTarget.VARIABLE})
136 @NoToStringValue
137 public static final int ACC_STRICT = 1<<11;
138 @Use({FlagTarget.CLASS})
139 @NoToStringValue
140 public static final int ACC_MODULE = 1<<15;
141
142 /* ***************************************
143 * Internal compiler flags (no bits in the lower 16).
144 *****************************************/
145
146 /** Flag is set if symbol is deprecated. See also DEPRECATED_REMOVAL.
147 */
148 @Use({FlagTarget.CLASS, FlagTarget.METHOD, FlagTarget.MODULE, FlagTarget.PACKAGE, FlagTarget.TYPE_VAR, FlagTarget.VARIABLE})
149 public static final int DEPRECATED = 1<<17;
150
151 /** Flag is set for a variable symbol if the variable's definition
152 * has an initializer part.
153 */
154 @Use({FlagTarget.VARIABLE})
155 public static final int HASINIT = 1<<18;
156
157 /** Flag is set for a class or interface whose instances have identity
158 * i.e. any concrete class not declared with the modifier `value'
159 * (a) abstract class not declared `value'
160 * (b) older class files with ACC_SUPER bit set
161 */
162 @Use({FlagTarget.CLASS})
163 public static final int IDENTITY_TYPE = 1<<18;
164
165 /** Class is an implicitly declared top level class.
166 */
167 @Use({FlagTarget.CLASS})
168 public static final int IMPLICIT_CLASS = 1<<19;
169
170 /** Variable with implicit/inferred type.
171 */
172 @Use(FlagTarget.VARIABLE)
173 public static final int VAR_VARIABLE = 1<<21;
174
175 /** Flag is set for compiler-generated anonymous method symbols
176 * that `own' an initializer block.
177 */
178 @Use({FlagTarget.METHOD})
179 public static final int BLOCK = 1<<21;
180
181 /** Marks a type as a value class */
182 @Use({FlagTarget.CLASS})
183 public static final int VALUE_CLASS = 1<<20;
184
185 /** A parameter of a lambda function.
186 */
187 @Use(FlagTarget.VARIABLE)
188 public static final int LAMBDA_PARAMETER = 1<<23;
189
190 /** Flag is set for ClassSymbols that are being compiled from source.
191 */
192 @Use({FlagTarget.CLASS})
193 public static final int FROM_SOURCE = 1<<21;
194
195 /** Flag is set for nested classes that do not access instance members
196 * or `this' of an outer class and therefore don't need to be passed
197 * a this$n reference. This value is currently set only for anonymous
198 * classes in superclass constructor calls.
199 * todo: use this value for optimizing away this$n parameters in
200 * other cases.
201 */
202 @Use({FlagTarget.CLASS, FlagTarget.VARIABLE})
203 public static final int NOOUTERTHIS = 1<<22;
204
205 /** Flag is set for package symbols if a package has a member or
206 * directory and therefore exists.
207 */
208 @Use({FlagTarget.CLASS, FlagTarget.PACKAGE})
368 public static final long SEALED = 1L<<48; // part of ExtendedStandardFlags, cannot be reused
369
370 /**
371 * Flag that marks a synthetic method body for a lambda expression
372 */
373 @Use({FlagTarget.METHOD})
374 public static final long LAMBDA_METHOD = 1L<<49;
375
376 /**
377 * Flag that marks a synthetic local capture field in a local/anon class
378 */
379 @Use({FlagTarget.VARIABLE})
380 public static final long LOCAL_CAPTURE_FIELD = 1L<<49;
381
382 /**
383 * Flag to control recursion in TransTypes
384 */
385 @Use({FlagTarget.CLASS})
386 public static final long TYPE_TRANSLATED = 1L<<50;
387
388 /** Flag is set for the outer this field of an inner class.
389 */
390 @Use({FlagTarget.VARIABLE})
391 public static final long OUTER_THIS_FIELD = 1L<<50;
392
393 /**
394 * Flag to indicate class symbol is for module-info
395 */
396 @Use({FlagTarget.CLASS})
397 public static final long MODULE = 1L<<51;
398
399 /**
400 * Flag to indicate the given ModuleSymbol is an automatic module.
401 */
402 @Use({FlagTarget.MODULE})
403 public static final long AUTOMATIC_MODULE = 1L<<52;
404
405 /**
406 * Flag to indicate the given PackageSymbol contains any non-.java and non-.class resources.
407 */
408 @Use({FlagTarget.PACKAGE})
409 public static final long HAS_RESOURCE = 1L<<52;
410
411 /**
412 * Flag to indicate the given ParamSymbol has a user-friendly name filled.
508
509 /**
510 * Flag to indicate parameters that require identity.
511 */
512 @Use({FlagTarget.VARIABLE}) //ParamSymbols only
513 public static final long REQUIRES_IDENTITY = 1L<<62;
514
515 /**
516 * Flag to indicate type annotations have been queued for field initializers.
517 */
518 @Use({FlagTarget.VARIABLE})
519 public static final long FIELD_INIT_TYPE_ANNOTATIONS_QUEUED = 1L<<53;
520
521 /**
522 * Flag to indicate that the class/interface was declared with the non-sealed modifier.
523 */
524 @Use({FlagTarget.CLASS})
525 @CustomToStringValue("non-sealed")
526 public static final long NON_SEALED = 1L<<63; // part of ExtendedStandardFlags, cannot be reused
527
528 /**
529 * Flag to indicate that a field is strict
530 */
531 @Use({FlagTarget.VARIABLE})
532 public static final long STRICT = 1L<<19; // VarSymbols
533
534 /**
535 * Describe modifier flags as they might appear in source code, i.e.,
536 * separated by spaces and in the order suggested by JLS 8.1.1.
537 */
538 public static String toSource(long flags) {
539 return asModifierSet(flags).stream()
540 .map(Modifier::toString)
541 .collect(Collectors.joining(" "));
542 }
543
544 /** Modifier masks.
545 */
546 @NotFlag
547 public static final int
548 AccessFlags = PUBLIC | PROTECTED | PRIVATE,
549 LocalClassFlags = FINAL | ABSTRACT | STRICTFP | ENUM | SYNTHETIC | IDENTITY_TYPE,
550 StaticLocalClassFlags = LocalClassFlags | STATIC | INTERFACE,
551 MemberClassFlags = LocalClassFlags | INTERFACE | AccessFlags,
552 MemberStaticClassFlags = MemberClassFlags | STATIC,
553 ClassFlags = LocalClassFlags | INTERFACE | PUBLIC | ANNOTATION,
554 InterfaceVarFlags = FINAL | STATIC | PUBLIC,
555 VarFlags = AccessFlags | FINAL | STATIC |
556 VOLATILE | TRANSIENT | ENUM,
557 ConstructorFlags = AccessFlags,
558 InterfaceMethodFlags = ABSTRACT | PUBLIC,
559 MethodFlags = AccessFlags | ABSTRACT | STATIC | NATIVE |
560 SYNCHRONIZED | FINAL | STRICTFP,
561 RecordMethodFlags = AccessFlags | ABSTRACT | STATIC |
562 SYNCHRONIZED | FINAL | STRICTFP;
563 @NotFlag
564 public static final long
565 //NOTE: flags in ExtendedStandardFlags cannot be overlayed across Symbol kinds:
566 ExtendedStandardFlags = (long)StandardFlags | DEFAULT | SEALED | NON_SEALED | VALUE_CLASS,
567 ExtendedMemberClassFlags = (long)MemberClassFlags | SEALED | NON_SEALED | VALUE_CLASS,
568 ExtendedMemberStaticClassFlags = (long) MemberStaticClassFlags | SEALED | NON_SEALED | VALUE_CLASS,
569 ExtendedClassFlags = (long)ClassFlags | SEALED | NON_SEALED | VALUE_CLASS,
570 ExtendedLocalClassFlags = (long) LocalClassFlags | VALUE_CLASS,
571 ExtendedStaticLocalClassFlags = (long) StaticLocalClassFlags | VALUE_CLASS,
572 ValueFieldFlags = (long) VarFlags | STRICT | FINAL,
573 ModifierFlags = ((long)StandardFlags & ~INTERFACE) | DEFAULT | SEALED | NON_SEALED | VALUE_CLASS,
574 InterfaceMethodMask = ABSTRACT | PRIVATE | STATIC | PUBLIC | STRICTFP | DEFAULT,
575 AnnotationTypeElementMask = ABSTRACT | PUBLIC,
576 LocalVarFlags = FINAL | PARAMETER,
577 ReceiverParamFlags = PARAMETER;
578
579 @SuppressWarnings("preview") // allow use of VALUE_CLASS when building jdk.compiler.interim
580 public static Set<Modifier> asModifierSet(long flags) {
581 Set<Modifier> modifiers = modifierSets.get(flags);
582 if (modifiers == null) {
583 modifiers = java.util.EnumSet.noneOf(Modifier.class);
584 if (0 != (flags & PUBLIC)) modifiers.add(Modifier.PUBLIC);
585 if (0 != (flags & PROTECTED)) modifiers.add(Modifier.PROTECTED);
586 if (0 != (flags & PRIVATE)) modifiers.add(Modifier.PRIVATE);
587 if (0 != (flags & ABSTRACT)) modifiers.add(Modifier.ABSTRACT);
588 if (0 != (flags & STATIC)) modifiers.add(Modifier.STATIC);
589 if (0 != (flags & SEALED)) modifiers.add(Modifier.SEALED);
590 if (0 != (flags & NON_SEALED))
591 modifiers.add(Modifier.NON_SEALED);
592 if (0 != (flags & FINAL)) modifiers.add(Modifier.FINAL);
593 if (0 != (flags & TRANSIENT)) modifiers.add(Modifier.TRANSIENT);
594 if (0 != (flags & VOLATILE)) modifiers.add(Modifier.VOLATILE);
595 if (0 != (flags & SYNCHRONIZED))
596 modifiers.add(Modifier.SYNCHRONIZED);
597 if (0 != (flags & NATIVE)) modifiers.add(Modifier.NATIVE);
598 if (0 != (flags & STRICTFP)) modifiers.add(Modifier.STRICTFP);
599 if (0 != (flags & DEFAULT)) modifiers.add(Modifier.DEFAULT);
600 if (0 != (flags & VALUE_CLASS)) modifiers.add(Modifier.VALUE);
601 modifiers = Collections.unmodifiableSet(modifiers);
602 modifierSets.put(flags, modifiers);
603 }
604 return modifiers;
605 }
606
607 // Cache of modifier sets.
608 private static final Map<Long, Set<Modifier>> modifierSets = new ConcurrentHashMap<>(64);
609
610 public static boolean isStatic(Symbol symbol) {
611 return (symbol.flags() & STATIC) != 0;
612 }
613
614 public static boolean isEnum(Symbol symbol) {
615 return (symbol.flags() & ENUM) != 0;
616 }
617
618 public static boolean isConstant(Symbol.VarSymbol symbol) {
619 return symbol.getConstValue() != null;
620 }
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