forked from eclipse-jdt/eclipse.jdt.core
-
Notifications
You must be signed in to change notification settings - Fork 0
/
MessageSend.java
1373 lines (1304 loc) · 64.1 KB
/
MessageSend.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*******************************************************************************
* Copyright (c) 2000, 2024 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
* Nick Teryaev - fix for bug (https://bugs.eclipse.org/bugs/show_bug.cgi?id=40752)
* Stephan Herrmann - Contributions for
* bug 319201 - [null] no warning when unboxing SingleNameReference causes NPE
* bug 349326 - [1.7] new warning for missing try-with-resources
* bug 186342 - [compiler][null] Using annotations for null checking
* bug 358903 - Filter practically unimportant resource leak warnings
* bug 370639 - [compiler][resource] restore the default for resource leak warnings
* bug 345305 - [compiler][null] Compiler misidentifies a case of "variable can only be null"
* bug 388996 - [compiler][resource] Incorrect 'potential resource leak'
* bug 379784 - [compiler] "Method can be static" is not getting reported
* bug 379834 - Wrong "method can be static" in presence of qualified super and different staticness of nested super class.
* bug 388281 - [compiler][null] inheritance of null annotations as an option
* bug 392862 - [1.8][compiler][null] Evaluate null annotations on array types
* bug 394768 - [compiler][resource] Incorrect resource leak warning when creating stream in conditional
* bug 381445 - [compiler][resource] Can the resource leak check be made aware of Closeables.closeQuietly?
* bug 331649 - [compiler][null] consider null annotations for fields
* bug 383368 - [compiler][null] syntactic null analysis for field references
* bug 382069 - [null] Make the null analysis consider JUnit's assertNotNull similarly to assertions
* bug 382350 - [1.8][compiler] Unable to invoke inherited default method via I.super.m() syntax
* bug 404649 - [1.8][compiler] detect illegal reference to indirect or redundant super
* bug 403086 - [compiler][null] include the effect of 'assert' in syntactic null analysis for fields
* bug 403147 - [compiler][null] FUP of bug 400761: consolidate interaction between unboxing, NPE, and deferred checking
* Bug 392099 - [1.8][compiler][null] Apply null annotation on types for null analysis
* Bug 415043 - [1.8][null] Follow-up re null type annotations after bug 392099
* Bug 405569 - Resource leak check false positive when using DbUtils.closeQuietly
* Bug 411964 - [1.8][null] leverage null type annotation in foreach statement
* Bug 417295 - [1.8[[null] Massage type annotated null analysis to gel well with deep encoded type bindings.
* Bug 400874 - [1.8][compiler] Inference infrastructure should evolve to meet JLS8 18.x (Part G of JSR335 spec)
* Bug 423504 - [1.8] Implement "18.5.3 Functional Interface Parameterization Inference"
* Bug 424710 - [1.8][compiler] CCE in SingleNameReference.localVariableBinding
* Bug 425152 - [1.8] [compiler] Lambda Expression not resolved but flow analyzed leading to NPE.
* Bug 424205 - [1.8] Cannot infer type for diamond type with lambda on method invocation
* Bug 424415 - [1.8][compiler] Eventual resolution of ReferenceExpression is not seen to be happening.
* Bug 426366 - [1.8][compiler] Type inference doesn't handle multiple candidate target types in outer overload context
* Bug 426290 - [1.8][compiler] Inference + overloading => wrong method resolution ?
* Bug 427483 - [Java 8] Variables in lambdas sometimes can't be resolved
* Bug 427438 - [1.8][compiler] NPE at org.eclipse.jdt.internal.compiler.ast.ConditionalExpression.generateCode(ConditionalExpression.java:280)
* Bug 426996 - [1.8][inference] try to avoid method Expression.unresolve()?
* Bug 428352 - [1.8][compiler] Resolution errors don't always surface
* Bug 429430 - [1.8] Lambdas and method reference infer wrong exception type with generics (RuntimeException instead of IOException)
* Bug 441734 - [1.8][inference] Generic method with nested parameterized type argument fails on method reference
* Bug 452788 - [1.8][compiler] Type not correctly inferred in lambda expression
* Bug 456487 - [1.8][null] @Nullable type variant of @NonNull-constrained type parameter causes grief
* Bug 407414 - [compiler][null] Incorrect warning on a primitive type being null
* Bug 472618 - [compiler][null] assertNotNull vs. Assert.assertNotNull
* Bug 470958 - [1.8] Unable to convert lambda
* Bug 410218 - Optional warning for arguments of "unexpected" types to Map#get(Object), Collection#remove(Object) et al.
* Jesper S Moller - Contributions for
* Bug 378674 - "The method can be declared as static" is wrong
* Andy Clement (GoPivotal, Inc) aclement@gopivotal.com - Contributions for
* Bug 383624 - [1.8][compiler] Revive code generation support for type annotations (from Olivier's work)
* Bug 409245 - [1.8][compiler] Type annotations dropped when call is routed through a synthetic bridge method
*******************************************************************************/
package org.eclipse.jdt.internal.compiler.ast;
import static org.eclipse.jdt.internal.compiler.ast.ExpressionContext.ASSIGNMENT_CONTEXT;
import static org.eclipse.jdt.internal.compiler.ast.ExpressionContext.INVOCATION_CONTEXT;
import static org.eclipse.jdt.internal.compiler.ast.ExpressionContext.VANILLA_CONTEXT;
import java.util.HashMap;
import java.util.function.BiConsumer;
import org.eclipse.jdt.core.compiler.CharOperation;
import org.eclipse.jdt.internal.compiler.ASTVisitor;
import org.eclipse.jdt.internal.compiler.classfmt.ClassFileConstants;
import org.eclipse.jdt.internal.compiler.codegen.CodeStream;
import org.eclipse.jdt.internal.compiler.codegen.Opcodes;
import org.eclipse.jdt.internal.compiler.flow.ConditionalFlowInfo;
import org.eclipse.jdt.internal.compiler.flow.FlowContext;
import org.eclipse.jdt.internal.compiler.flow.FlowInfo;
import org.eclipse.jdt.internal.compiler.flow.UnconditionalFlowInfo;
import org.eclipse.jdt.internal.compiler.impl.CompilerOptions;
import org.eclipse.jdt.internal.compiler.impl.Constant;
import org.eclipse.jdt.internal.compiler.impl.IrritantSet;
import org.eclipse.jdt.internal.compiler.impl.ReferenceContext;
import org.eclipse.jdt.internal.compiler.lookup.ArrayBinding;
import org.eclipse.jdt.internal.compiler.lookup.Binding;
import org.eclipse.jdt.internal.compiler.lookup.BlockScope;
import org.eclipse.jdt.internal.compiler.lookup.ExtraCompilerModifiers;
import org.eclipse.jdt.internal.compiler.lookup.FieldBinding;
import org.eclipse.jdt.internal.compiler.lookup.ImplicitNullAnnotationVerifier;
import org.eclipse.jdt.internal.compiler.lookup.InferenceContext18;
import org.eclipse.jdt.internal.compiler.lookup.InferenceVariable;
import org.eclipse.jdt.internal.compiler.lookup.LocalVariableBinding;
import org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment;
import org.eclipse.jdt.internal.compiler.lookup.MethodBinding;
import org.eclipse.jdt.internal.compiler.lookup.MethodScope;
import org.eclipse.jdt.internal.compiler.lookup.MissingTypeBinding;
import org.eclipse.jdt.internal.compiler.lookup.ParameterizedGenericMethodBinding;
import org.eclipse.jdt.internal.compiler.lookup.ParameterizedMethodBinding;
import org.eclipse.jdt.internal.compiler.lookup.ParameterizedTypeBinding;
import org.eclipse.jdt.internal.compiler.lookup.PolyParameterizedGenericMethodBinding;
import org.eclipse.jdt.internal.compiler.lookup.PolyTypeBinding;
import org.eclipse.jdt.internal.compiler.lookup.PolymorphicMethodBinding;
import org.eclipse.jdt.internal.compiler.lookup.ProblemMethodBinding;
import org.eclipse.jdt.internal.compiler.lookup.ProblemReasons;
import org.eclipse.jdt.internal.compiler.lookup.ProblemReferenceBinding;
import org.eclipse.jdt.internal.compiler.lookup.RawTypeBinding;
import org.eclipse.jdt.internal.compiler.lookup.ReferenceBinding;
import org.eclipse.jdt.internal.compiler.lookup.Scope;
import org.eclipse.jdt.internal.compiler.lookup.SourceTypeBinding;
import org.eclipse.jdt.internal.compiler.lookup.TagBits;
import org.eclipse.jdt.internal.compiler.lookup.TypeBinding;
import org.eclipse.jdt.internal.compiler.lookup.TypeConstants;
import org.eclipse.jdt.internal.compiler.lookup.TypeIds;
import org.eclipse.jdt.internal.compiler.lookup.TypeVariableBinding;
import org.eclipse.jdt.internal.compiler.problem.ProblemSeverities;
import org.eclipse.jdt.internal.compiler.util.SimpleLookupTable;
public class MessageSend extends Expression implements IPolyExpression, Invocation {
public Expression receiver;
public char[] selector;
public Expression[] arguments;
public MethodBinding binding; // exact binding resulting from lookup
public MethodBinding syntheticAccessor; // synthetic accessor for inner-emulation
public TypeBinding expectedType; // for generic method invocation (return type inference)
public long nameSourcePosition ; //(start<<32)+end
public TypeBinding actualReceiverType;
public TypeBinding valueCast; // extra reference type cast to perform on method returned value
public TypeReference[] typeArguments;
public TypeBinding[] genericTypeArguments;
public ExpressionContext expressionContext = VANILLA_CONTEXT;
// hold on to this context from invocation applicability inference until invocation type inference (per method candidate):
private SimpleLookupTable/*<PGMB,InferenceContext18>*/ inferenceContexts;
private HashMap<TypeBinding, MethodBinding> solutionsPerTargetType;
private InferenceContext18 outerInferenceContext; // resolving within the context of an outer (lambda) inference?
private boolean receiverIsType;
protected boolean argsContainCast;
public TypeBinding[] argumentTypes = Binding.NO_PARAMETERS;
public boolean argumentsHaveErrors = false;
public FakedTrackingVariable closeTracker;
BiConsumer<FlowInfo, Boolean> flowUpdateOnBooleanResult; // we assume only one arg can be affected, hence no need for a list of updates
@Override
public FlowInfo analyseCode(BlockScope currentScope, FlowContext flowContext, FlowInfo flowInfo) {
boolean nonStatic = !this.binding.isStatic();
boolean wasInsideAssert = ((flowContext.tagBits & FlowContext.HIDE_NULL_COMPARISON_WARNING) != 0);
flowInfo = this.receiver.analyseCode(currentScope, flowContext, flowInfo, nonStatic).unconditionalInits();
yieldQualifiedCheck(currentScope);
// recording the closing of AutoCloseable resources:
CompilerOptions compilerOptions = currentScope.compilerOptions();
boolean analyseResources = compilerOptions.analyseResourceLeaks && flowInfo.reachMode() == FlowInfo.REACHABLE;
if (analyseResources) {
if (nonStatic) {
// closeable.close()
if (this.binding.isClosingMethod()) {
recordCallingClose(currentScope, flowContext, flowInfo, this.receiver);
}
} else if (this.arguments != null && this.arguments.length > 0 && FakedTrackingVariable.isAnyCloseable(this.arguments[0].resolvedType)) {
// Helper.closeMethod(closeable, ..)
for (CloseMethodRecord record : TypeConstants.closeMethods) {
if (CharOperation.equals(record.selector, this.selector)
&& CharOperation.equals(record.typeName, this.binding.declaringClass.compoundName))
{
int len = Math.min(record.numCloseableArgs, this.arguments.length);
for (int j=0; j<len; j++)
recordCallingClose(currentScope, flowContext, flowInfo, this.arguments[j]);
break;
}
}
}
}
if (compilerOptions.isAnyEnabled(IrritantSet.UNLIKELY_ARGUMENT_TYPE) && this.binding.isValidBinding()
&& this.arguments != null) {
if (this.arguments.length == 1 && !this.binding.isStatic()) {
UnlikelyArgumentCheck argumentChecks = UnlikelyArgumentCheck.determineCheckForNonStaticSingleArgumentMethod(
this.argumentTypes[0], currentScope, this.selector, this.actualReceiverType, this.binding.parameters);
if (argumentChecks != null && argumentChecks.isDangerous(currentScope)) {
currentScope.problemReporter().unlikelyArgumentType(this.arguments[0], this.binding,
this.argumentTypes[0], argumentChecks.typeToReport, argumentChecks.dangerousMethod);
}
} else if (this.arguments.length == 2 && this.binding.isStatic()) {
UnlikelyArgumentCheck argumentChecks = UnlikelyArgumentCheck.determineCheckForStaticTwoArgumentMethod(
this.argumentTypes[1], currentScope, this.selector, this.argumentTypes[0],
this.binding.parameters, this.actualReceiverType);
if (argumentChecks != null && argumentChecks.isDangerous(currentScope)) {
currentScope.problemReporter().unlikelyArgumentType(this.arguments[1], this.binding,
this.argumentTypes[1], argumentChecks.typeToReport, argumentChecks.dangerousMethod);
}
}
}
if (nonStatic) {
int timeToLive = ((this.bits & ASTNode.InsideExpressionStatement) != 0) ? 3 : 2;
this.receiver.checkNPE(currentScope, flowContext, flowInfo, timeToLive);
}
if (this.arguments != null) {
int length = this.arguments.length;
for (int i = 0; i < length; i++) {
Expression argument = this.arguments[i];
argument.checkNPEbyUnboxing(currentScope, flowContext, flowInfo);
switch (detectAssertionUtility(i)) {
case TRUE_ASSERTION:
flowInfo = analyseBooleanAssertion(currentScope, argument, flowContext, flowInfo, wasInsideAssert, true);
break;
case FALSE_ASSERTION:
flowInfo = analyseBooleanAssertion(currentScope, argument, flowContext, flowInfo, wasInsideAssert, false);
break;
case NONNULL_ASSERTION:
flowInfo = analyseNullAssertion(currentScope, argument, flowContext, flowInfo, false);
break;
case NULL_ASSERTION:
flowInfo = analyseNullAssertion(currentScope, argument, flowContext, flowInfo, true);
break;
case ARG_NONNULL_IF_TRUE:
LocalVariableBinding localBinding = ((SingleNameReference) argument).localVariableBinding();
recordFlowUpdateOnResult(localBinding, true, false);
flowInfo = argument.analyseCode(currentScope, flowContext, flowInfo).unconditionalInits();
flowInfo = setUnreachable(flowInfo, flowContext, localBinding, AssertUtil.ARG_NONNULL_IF_TRUE);
break;
case ARG_NONNULL_IF_TRUE_NEGATABLE:
localBinding = ((SingleNameReference) argument).localVariableBinding();
recordFlowUpdateOnResult(localBinding, true, true);
flowInfo = argument.analyseCode(currentScope, flowContext, flowInfo).unconditionalInits();
flowInfo = setUnreachable(flowInfo, flowContext, localBinding, AssertUtil.ARG_NONNULL_IF_TRUE_NEGATABLE);
break;
case ARG_NULL_IF_TRUE:
localBinding = ((SingleNameReference) argument).localVariableBinding();
recordFlowUpdateOnResult(localBinding, false, true);
flowInfo = argument.analyseCode(currentScope, flowContext, flowInfo).unconditionalInits();
flowInfo = setUnreachable(flowInfo, flowContext, localBinding, AssertUtil.ARG_NULL_IF_TRUE);
break;
default:
flowInfo = argument.analyseCode(currentScope, flowContext, flowInfo).unconditionalInits();
}
if (analyseResources) {
flowInfo = handleResourcePassedToInvocation(currentScope, this.binding, argument, i, flowContext, flowInfo);
}
}
analyseArguments(currentScope, flowContext, flowInfo, this.binding, this.arguments);
}
ReferenceBinding[] thrownExceptions;
if ((thrownExceptions = this.binding.thrownExceptions) != Binding.NO_EXCEPTIONS) {
if ((this.bits & ASTNode.Unchecked) != 0 && this.genericTypeArguments == null) {
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=277643, align with javac on JLS 15.12.2.6
thrownExceptions = currentScope.environment().convertToRawTypes(this.binding.thrownExceptions, true, true);
}
// must verify that exceptions potentially thrown by this expression are caught in the method
flowContext.checkExceptionHandlers(thrownExceptions, this, flowInfo.copy(), currentScope);
// TODO (maxime) the copy above is needed because of a side effect into
// checkExceptionHandlers; consider protecting there instead of here;
// NullReferenceTest#test0510
}
// after having analysed exceptions above start tracking newly allocated resource:
if (analyseResources && FakedTrackingVariable.isAnyCloseable(this.resolvedType))
flowInfo = FakedTrackingVariable.analyseCloseableAcquisition(currentScope, flowInfo, flowContext, this);
manageSyntheticAccessIfNecessary(currentScope, flowInfo);
// account for pot. exceptions thrown by method execution
flowContext.recordAbruptExit();
flowContext.expireNullCheckedFieldInfo(); // no longer trust this info after any message send
return flowInfo;
}
private FlowInfo setUnreachable(FlowInfo flowInfo, FlowContext flowContext, LocalVariableBinding localBinding,
AssertUtil assertUtil) {
if ((flowInfo.tagBits & FlowInfo.UNREACHABLE) == 0) {
boolean isDefinitellyNull;
boolean isDefinitellyNonNull;
switch (assertUtil) {
case ARG_NONNULL_IF_TRUE: {
isDefinitellyNull = flowInfo.isDefinitelyNull(localBinding);
if (isDefinitellyNull) {
flowInfo = FlowInfo.conditional(flowInfo.copy(), flowInfo.copy());
((ConditionalFlowInfo) flowInfo).initsWhenTrue().setReachMode(FlowInfo.UNREACHABLE_BY_NULLANALYSIS);
}
break;
}
case ARG_NULL_IF_TRUE: {
isDefinitellyNull = flowInfo.isDefinitelyNull(localBinding);
isDefinitellyNonNull = flowInfo.isDefinitelyNonNull(localBinding);
flowInfo = FlowInfo.conditional(flowInfo.copy(), flowInfo.copy());
if (isDefinitellyNull) {
((ConditionalFlowInfo) flowInfo).initsWhenFalse().setReachMode(FlowInfo.UNREACHABLE_BY_NULLANALYSIS);
} else if (isDefinitellyNonNull) {
((ConditionalFlowInfo) flowInfo).initsWhenTrue.setReachMode(FlowInfo.UNREACHABLE_BY_NULLANALYSIS);
}
break;
}
case ARG_NONNULL_IF_TRUE_NEGATABLE: {
isDefinitellyNull = flowInfo.isDefinitelyNull(localBinding);
isDefinitellyNonNull = flowInfo.isDefinitelyNonNull(localBinding);
flowInfo = FlowInfo.conditional(flowInfo.copy(), flowInfo.copy());
if (isDefinitellyNull) {
((ConditionalFlowInfo) flowInfo).initsWhenTrue().setReachMode(FlowInfo.UNREACHABLE_BY_NULLANALYSIS);
} else if (isDefinitellyNonNull) {
((ConditionalFlowInfo) flowInfo).initsWhenFalse.setReachMode(FlowInfo.UNREACHABLE_BY_NULLANALYSIS);
}
break;
}
default:
break;
}
}
return flowInfo;
}
public void recordFlowUpdateOnResult(LocalVariableBinding local, boolean nonNullIfTrue, boolean negatable) {
this.flowUpdateOnBooleanResult = (f, result) -> {
if (result || negatable) {
if (result == nonNullIfTrue)
f.markAsDefinitelyNonNull(local);
else
f.markAsDefinitelyNull(local);
}
};
}
@Override
protected void updateFlowOnBooleanResult(FlowInfo flowInfo, boolean result) {
if (this.flowUpdateOnBooleanResult != null) {
this.flowUpdateOnBooleanResult.accept(flowInfo, result);
}
}
private void yieldQualifiedCheck(BlockScope currentScope) {
long sourceLevel = currentScope.compilerOptions().sourceLevel;
if (sourceLevel < ClassFileConstants.JDK14 || !this.receiverIsImplicitThis())
return;
if (!CharOperation.equals(this.selector, TypeConstants.YIELD))
return;
currentScope.problemReporter().switchExpressionsYieldUnqualifiedMethodError(this);
}
private void recordCallingClose(BlockScope currentScope, FlowContext flowContext, FlowInfo flowInfo, Expression closeTarget) {
if (closeTarget.isThis() || closeTarget.isSuper()) {
// this / super calls of closing method take care of all owning fields
ReferenceBinding currentClass = this.binding.declaringClass; // responsibility starts at the class and upwards
while (currentClass != null) {
for (FieldBinding fieldBinding : currentClass.fields()) {
if (fieldBinding.closeTracker != null) {
FakedTrackingVariable trackingVariable = fieldBinding.closeTracker;
if (trackingVariable.methodScope == null || trackingVariable.methodScope == currentScope.methodScope()) {
trackingVariable.markClose(flowInfo, flowContext);
} else {
trackingVariable.markClosedInNestedMethod();
}
}
}
currentClass = currentClass.superclass();
}
} else {
FakedTrackingVariable trackingVariable = FakedTrackingVariable.getCloseTrackingVariable(closeTarget, flowInfo, flowContext,
currentScope.compilerOptions().isAnnotationBasedResourceAnalysisEnabled);
if (trackingVariable != null) { // null happens if target is not a variable or not an AutoCloseable
if (trackingVariable.methodScope == null || trackingVariable.methodScope == currentScope.methodScope()) {
trackingVariable.markClose(flowInfo, flowContext);
} else {
trackingVariable.markClosedInNestedMethod();
}
}
}
}
// classification of well-known assertion utilities:
private enum AssertUtil { NONE, TRUE_ASSERTION, FALSE_ASSERTION, NULL_ASSERTION, NONNULL_ASSERTION, ARG_NONNULL_IF_TRUE, ARG_NONNULL_IF_TRUE_NEGATABLE, ARG_NULL_IF_TRUE }
// is the argument at the given position being checked by a well-known assertion utility?
// if so answer what kind of assertion we are facing.
private AssertUtil detectAssertionUtility(int argumentIdx) {
TypeBinding[] parameters = this.binding.original().parameters;
if (argumentIdx < parameters.length) {
TypeBinding parameterType = parameters[argumentIdx];
TypeBinding declaringClass = this.binding.declaringClass;
if (declaringClass != null && parameterType != null) {
switch (declaringClass.original().id) {
case TypeIds.T_OrgEclipseCoreRuntimeAssert:
if (parameterType.id == TypeIds.T_boolean)
return AssertUtil.TRUE_ASSERTION;
if (parameterType.id == TypeIds.T_JavaLangObject && CharOperation.equals(TypeConstants.IS_NOTNULL, this.selector))
return AssertUtil.NONNULL_ASSERTION;
break;
case TypeIds.T_JunitFrameworkAssert:
case TypeIds.T_OrgJunitAssert:
case TypeIds.T_OrgJunitJupiterApiAssertions:
if (parameterType.id == TypeIds.T_boolean) {
if (CharOperation.equals(TypeConstants.ASSERT_TRUE, this.selector))
return AssertUtil.TRUE_ASSERTION;
if (CharOperation.equals(TypeConstants.ASSERT_FALSE, this.selector))
return AssertUtil.FALSE_ASSERTION;
} else if (parameterType.id == TypeIds.T_JavaLangObject) {
if (CharOperation.equals(TypeConstants.ASSERT_NOTNULL, this.selector))
return AssertUtil.NONNULL_ASSERTION;
if (CharOperation.equals(TypeConstants.ASSERT_NULL, this.selector))
return AssertUtil.NULL_ASSERTION;
}
break;
case TypeIds.T_OrgApacheCommonsLangValidate:
if (parameterType.id == TypeIds.T_boolean) {
if (CharOperation.equals(TypeConstants.IS_TRUE, this.selector))
return AssertUtil.TRUE_ASSERTION;
} else if (parameterType.id == TypeIds.T_JavaLangObject) {
if (CharOperation.equals(TypeConstants.NOT_NULL, this.selector))
return AssertUtil.NONNULL_ASSERTION;
}
break;
case TypeIds.T_OrgApacheCommonsLang3Validate:
if (parameterType.id == TypeIds.T_boolean) {
if (CharOperation.equals(TypeConstants.IS_TRUE, this.selector))
return AssertUtil.TRUE_ASSERTION;
} else if (parameterType.isTypeVariable()) {
if (CharOperation.equals(TypeConstants.NOT_NULL, this.selector))
return AssertUtil.NONNULL_ASSERTION;
}
break;
case TypeIds.T_ComGoogleCommonBasePreconditions:
if (parameterType.id == TypeIds.T_boolean) {
if (CharOperation.equals(TypeConstants.CHECK_ARGUMENT, this.selector)
|| CharOperation.equals(TypeConstants.CHECK_STATE, this.selector))
return AssertUtil.TRUE_ASSERTION;
} else if (parameterType.isTypeVariable()) {
if (CharOperation.equals(TypeConstants.CHECK_NOT_NULL, this.selector))
return AssertUtil.NONNULL_ASSERTION;
}
break;
case TypeIds.T_JavaUtilObjects:
if (parameterType.isTypeVariable()) {
if (CharOperation.equals(TypeConstants.REQUIRE_NON_NULL, this.selector))
return AssertUtil.NONNULL_ASSERTION;
}
if (this.arguments[argumentIdx] instanceof SingleNameReference) {
SingleNameReference nameRef = (SingleNameReference) this.arguments[argumentIdx];
if (nameRef.binding instanceof LocalVariableBinding) {
if (CharOperation.equals(TypeConstants.NON_NULL, this.selector))
return AssertUtil.ARG_NONNULL_IF_TRUE_NEGATABLE;
if (CharOperation.equals(TypeConstants.IS_NULL, this.selector))
return AssertUtil.ARG_NULL_IF_TRUE;
}
}
break;
case TypeIds.T_JavaLangClass:
if (CharOperation.equals(TypeConstants.IS_INSTANCE, this.selector)) {
if (this.arguments[argumentIdx] instanceof SingleNameReference) {
SingleNameReference nameRef = (SingleNameReference) this.arguments[argumentIdx];
if (nameRef.binding instanceof LocalVariableBinding)
return AssertUtil.ARG_NONNULL_IF_TRUE;
}
}
break;
}
}
}
return AssertUtil.NONE;
}
private FlowInfo analyseBooleanAssertion(BlockScope currentScope, Expression argument,
FlowContext flowContext, FlowInfo flowInfo, boolean wasInsideAssert, boolean passOnTrue)
{
Constant cst = argument.optimizedBooleanConstant();
boolean isOptimizedTrueAssertion = cst != Constant.NotAConstant && cst.booleanValue() == true;
boolean isOptimizedFalseAssertion = cst != Constant.NotAConstant && cst.booleanValue() == false;
int tagBitsSave = flowContext.tagBits;
flowContext.tagBits |= FlowContext.HIDE_NULL_COMPARISON_WARNING;
if (!passOnTrue)
flowContext.tagBits |= FlowContext.INSIDE_NEGATION; // this affects syntactic analysis for fields in EqualExpression
FlowInfo conditionFlowInfo = argument.analyseCode(currentScope, flowContext, flowInfo.copy());
flowContext.extendTimeToLiveForNullCheckedField(2); // survive this assert as a MessageSend and as a Statement
flowContext.tagBits = tagBitsSave;
UnconditionalFlowInfo assertWhenPassInfo;
FlowInfo assertWhenFailInfo;
boolean isOptimizedPassing;
boolean isOptimizedFailing;
if (passOnTrue) {
assertWhenPassInfo = conditionFlowInfo.initsWhenTrue().unconditionalInits();
assertWhenFailInfo = conditionFlowInfo.initsWhenFalse();
isOptimizedPassing = isOptimizedTrueAssertion;
isOptimizedFailing = isOptimizedFalseAssertion;
} else {
assertWhenPassInfo = conditionFlowInfo.initsWhenFalse().unconditionalInits();
assertWhenFailInfo = conditionFlowInfo.initsWhenTrue();
isOptimizedPassing = isOptimizedFalseAssertion;
isOptimizedFailing = isOptimizedTrueAssertion;
}
if (isOptimizedPassing) {
assertWhenFailInfo.setReachMode(FlowInfo.UNREACHABLE_OR_DEAD);
}
if (!isOptimizedFailing) {
// if assertion is not failing for sure, only then it makes sense to carry the flow info ahead.
// if the code does reach ahead, it means the assert didn't cause an exit, and so
// the expression inside it shouldn't change the prior flowinfo
// viz. org.eclipse.core.runtime.Assert.isLegal(false && o != null)
// keep the merge from the initial code for the definite assignment
// analysis, tweak the null part to influence nulls downstream
flowInfo = flowInfo.mergedWith(assertWhenFailInfo.nullInfoLessUnconditionalCopy()).
addInitializationsFrom(assertWhenPassInfo.discardInitializationInfo());
}
return flowInfo;
}
private FlowInfo analyseNullAssertion(BlockScope currentScope, Expression argument,
FlowContext flowContext, FlowInfo flowInfo, boolean expectingNull)
{
int nullStatus = argument.nullStatus(flowInfo, flowContext);
boolean willFail = (nullStatus == (expectingNull ? FlowInfo.NON_NULL : FlowInfo.NULL));
flowInfo = argument.analyseCode(currentScope, flowContext, flowInfo).unconditionalInits();
LocalVariableBinding local = argument.localVariableBinding();
if (local != null) {// beyond this point the argument can only be null/nonnull
if (expectingNull)
flowInfo.markAsDefinitelyNull(local);
else
flowInfo.markAsDefinitelyNonNull(local);
} else {
if (!expectingNull
&& argument instanceof Reference
&& currentScope.compilerOptions().enableSyntacticNullAnalysisForFields)
{
FieldBinding field = ((Reference)argument).lastFieldBinding();
if (field != null && (field.type.tagBits & TagBits.IsBaseType) == 0) {
flowContext.recordNullCheckedFieldReference((Reference) argument, 3); // survive this assert as a MessageSend and as a Statement
}
}
}
if (willFail)
flowInfo.setReachMode(FlowInfo.UNREACHABLE_BY_NULLANALYSIS);
return flowInfo;
}
@Override
public boolean checkNPE(BlockScope scope, FlowContext flowContext, FlowInfo flowInfo, int ttlForFieldCheck) {
// message send as a receiver
int nullStatus = nullStatus(flowInfo, flowContext); // note that flowInfo is not used inside nullStatus(..)
if ((nullStatus & FlowInfo.POTENTIALLY_NULL) != 0) {
if(this.binding.returnType.isTypeVariable() && nullStatus == FlowInfo.FREE_TYPEVARIABLE && scope.environment().globalOptions.pessimisticNullAnalysisForFreeTypeVariablesEnabled) {
scope.problemReporter().methodReturnTypeFreeTypeVariableReference(this.binding, this);
} else {
scope.problemReporter().messageSendPotentialNullReference(this.binding, this);
}
} else if ((this.resolvedType.tagBits & TagBits.AnnotationNonNull) != 0) {
NullAnnotationMatching nonNullStatus = NullAnnotationMatching.okNonNullStatus(this);
if (nonNullStatus.wantToReport())
nonNullStatus.report(scope);
}
return true; // done all possible checking
}
/**
* @see org.eclipse.jdt.internal.compiler.ast.Expression#computeConversion(org.eclipse.jdt.internal.compiler.lookup.Scope, org.eclipse.jdt.internal.compiler.lookup.TypeBinding, org.eclipse.jdt.internal.compiler.lookup.TypeBinding)
*/
@Override
public void computeConversion(Scope scope, TypeBinding runtimeTimeType, TypeBinding compileTimeType) {
if (runtimeTimeType == null || compileTimeType == null)
return;
// set the generic cast after the fact, once the type expectation is fully known (no need for strict cast)
if (this.binding != null && this.binding.isValidBinding()) {
MethodBinding originalBinding = this.binding.original();
TypeBinding originalType = originalBinding.returnType;
// extra cast needed if method return type is type variable
if (ArrayBinding.isArrayClone(this.actualReceiverType, this.binding)
&& runtimeTimeType.id != TypeIds.T_JavaLangObject
&& scope.compilerOptions().sourceLevel >= ClassFileConstants.JDK1_5) {
// from 1.5 source level on, array#clone() resolves to array type, but codegen to #clone()Object - thus require extra inserted cast
this.valueCast = runtimeTimeType;
} else if (originalType.leafComponentType().isTypeVariable()) {
TypeBinding targetType = (!compileTimeType.isBaseType() && runtimeTimeType.isBaseType())
? compileTimeType // unboxing: checkcast before conversion
: runtimeTimeType;
this.valueCast = originalType.genericCast(targetType);
}
if (this.valueCast instanceof ReferenceBinding) {
ReferenceBinding referenceCast = (ReferenceBinding) this.valueCast;
if (!referenceCast.canBeSeenBy(scope)) {
scope.problemReporter().invalidType(this,
new ProblemReferenceBinding(
CharOperation.splitOn('.', referenceCast.shortReadableName()),
referenceCast,
ProblemReasons.NotVisible));
}
}
}
super.computeConversion(scope, runtimeTimeType, compileTimeType);
}
/**
* MessageSend code generation
*
* @param currentScope org.eclipse.jdt.internal.compiler.lookup.BlockScope
* @param codeStream org.eclipse.jdt.internal.compiler.codegen.CodeStream
* @param valueRequired boolean
*/
@Override
public void generateCode(BlockScope currentScope, CodeStream codeStream, boolean valueRequired) {
cleanUpInferenceContexts();
int pc = codeStream.position;
// generate receiver/enclosing instance access
MethodBinding codegenBinding = this.binding instanceof PolymorphicMethodBinding ? this.binding : this.binding.original();
boolean isStatic = codegenBinding.isStatic();
if (isStatic) {
this.receiver.generateCode(currentScope, codeStream, false);
} else if ((this.bits & ASTNode.DepthMASK) != 0 && this.receiver.isImplicitThis()) { // outer access ?
// outer method can be reached through emulation if implicit access
ReferenceBinding targetType = currentScope.enclosingSourceType().enclosingTypeAt((this.bits & ASTNode.DepthMASK) >> ASTNode.DepthSHIFT);
Object[] path = currentScope.getEmulationPath(targetType, true /*only exact match*/, false/*consider enclosing arg*/);
codeStream.generateOuterAccess(path, this, targetType, currentScope);
} else {
this.receiver.generateCode(currentScope, codeStream, true);
if ((this.bits & NeedReceiverGenericCast) != 0) {
codeStream.checkcast(this.actualReceiverType);
}
}
codeStream.recordPositionsFrom(pc, this.sourceStart);
// generate arguments
generateArguments(this.binding, this.arguments, currentScope, codeStream);
pc = codeStream.position;
// actual message invocation
if (this.syntheticAccessor == null){
TypeBinding constantPoolDeclaringClass = CodeStream.getConstantPoolDeclaringClass(currentScope, codegenBinding, this.actualReceiverType, this.receiver.isImplicitThis());
if (isStatic){
codeStream.invoke(Opcodes.OPC_invokestatic, codegenBinding, constantPoolDeclaringClass, this.typeArguments);
} else if((this.receiver.isSuper()) ||
(!currentScope.enclosingSourceType().isNestmateOf(this.binding.declaringClass) && codegenBinding.isPrivate())){
codeStream.invoke(Opcodes.OPC_invokespecial, codegenBinding, constantPoolDeclaringClass, this.typeArguments);
} else if (constantPoolDeclaringClass.isInterface()) { // interface or annotation type
codeStream.invoke(Opcodes.OPC_invokeinterface, codegenBinding, constantPoolDeclaringClass, this.typeArguments);
} else {
codeStream.invoke(Opcodes.OPC_invokevirtual, codegenBinding, constantPoolDeclaringClass, this.typeArguments);
}
} else {
codeStream.invoke(Opcodes.OPC_invokestatic, this.syntheticAccessor, null /* default declaringClass */, this.typeArguments);
}
// required cast must occur even if no value is required
if (this.valueCast != null) codeStream.checkcast(this.valueCast);
if (valueRequired){
// implicit conversion if necessary
codeStream.generateImplicitConversion(this.implicitConversion);
} else {
boolean isUnboxing = (this.implicitConversion & TypeIds.UNBOXING) != 0;
// conversion only generated if unboxing
if (isUnboxing) codeStream.generateImplicitConversion(this.implicitConversion);
switch (isUnboxing ? postConversionType(currentScope).id : codegenBinding.returnType.id) {
case T_long :
case T_double :
codeStream.pop2();
break;
case T_void :
break;
default :
codeStream.pop();
}
}
codeStream.recordPositionsFrom(pc, (int)(this.nameSourcePosition >>> 32)); // highlight selector
}
/**
* @see org.eclipse.jdt.internal.compiler.lookup.InvocationSite#genericTypeArguments()
*/
@Override
public TypeBinding[] genericTypeArguments() {
return this.genericTypeArguments;
}
@Override
public boolean isSuperAccess() {
return this.receiver.isSuper();
}
@Override
public boolean isTypeAccess() {
return this.receiver != null && this.receiver.isTypeReference();
}
public void manageSyntheticAccessIfNecessary(BlockScope currentScope, FlowInfo flowInfo){
if ((flowInfo.tagBits & FlowInfo.UNREACHABLE_OR_DEAD) != 0) return;
// if method from parameterized type got found, use the original method at codegen time
MethodBinding codegenBinding = this.binding.original();
if (this.binding.isPrivate()){
boolean useNesting = currentScope.enclosingSourceType().isNestmateOf(codegenBinding.declaringClass) &&
!(this.receiver instanceof QualifiedSuperReference);
// depth is set for both implicit and explicit access (see MethodBinding#canBeSeenBy)
if (!useNesting &&
TypeBinding.notEquals(currentScope.enclosingSourceType(), codegenBinding.declaringClass)){
this.syntheticAccessor = ((SourceTypeBinding)codegenBinding.declaringClass).addSyntheticMethod(codegenBinding, false /* not super access there */);
currentScope.problemReporter().needToEmulateMethodAccess(codegenBinding, this);
return;
}
} else if (this.receiver instanceof QualifiedSuperReference) { // qualified super
if (this.actualReceiverType.isInterface())
return; // invoking an overridden default method, which is accessible/public by definition
// qualified super need emulation always
SourceTypeBinding destinationType = (SourceTypeBinding)(((QualifiedSuperReference)this.receiver).currentCompatibleType);
this.syntheticAccessor = destinationType.addSyntheticMethod(codegenBinding, isSuperAccess());
currentScope.problemReporter().needToEmulateMethodAccess(codegenBinding, this);
return;
} else if (this.binding.isProtected()){
SourceTypeBinding enclosingSourceType;
if (((this.bits & ASTNode.DepthMASK) != 0)
&& codegenBinding.declaringClass.getPackage()
!= (enclosingSourceType = currentScope.enclosingSourceType()).getPackage()){
SourceTypeBinding currentCompatibleType = (SourceTypeBinding)enclosingSourceType.enclosingTypeAt((this.bits & ASTNode.DepthMASK) >> ASTNode.DepthSHIFT);
this.syntheticAccessor = currentCompatibleType.addSyntheticMethod(codegenBinding, isSuperAccess());
currentScope.problemReporter().needToEmulateMethodAccess(codegenBinding, this);
return;
}
}
}
@Override
public int nullStatus(FlowInfo flowInfo, FlowContext flowContext) {
if ((this.implicitConversion & TypeIds.BOXING) != 0)
return FlowInfo.NON_NULL;
if (this.binding.isValidBinding()) {
// try to retrieve null status of this message send from an annotation of the called method:
long tagBits = this.binding.tagBits;
if ((tagBits & TagBits.AnnotationNullMASK) == 0L) // alternatively look for type annotation (will only be present in 1.8+):
tagBits = this.binding.returnType.tagBits & TagBits.AnnotationNullMASK;
if(tagBits == 0L && this.binding.returnType.isFreeTypeVariable()) {
return FlowInfo.FREE_TYPEVARIABLE;
}
return FlowInfo.tagBitsToNullStatus(tagBits);
}
return FlowInfo.UNKNOWN;
}
/**
* @see org.eclipse.jdt.internal.compiler.ast.Expression#postConversionType(Scope)
*/
@Override
public TypeBinding postConversionType(Scope scope) {
TypeBinding convertedType = this.resolvedType;
if (this.valueCast != null)
convertedType = this.valueCast;
int runtimeType = (this.implicitConversion & TypeIds.IMPLICIT_CONVERSION_MASK) >> 4;
switch (runtimeType) {
case T_boolean :
convertedType = TypeBinding.BOOLEAN;
break;
case T_byte :
convertedType = TypeBinding.BYTE;
break;
case T_short :
convertedType = TypeBinding.SHORT;
break;
case T_char :
convertedType = TypeBinding.CHAR;
break;
case T_int :
convertedType = TypeBinding.INT;
break;
case T_float :
convertedType = TypeBinding.FLOAT;
break;
case T_long :
convertedType = TypeBinding.LONG;
break;
case T_double :
convertedType = TypeBinding.DOUBLE;
break;
default :
}
if ((this.implicitConversion & TypeIds.BOXING) != 0) {
convertedType = scope.environment().computeBoxingType(convertedType);
}
return convertedType;
}
@Override
public StringBuilder printExpression(int indent, StringBuilder output){
if (!this.receiver.isImplicitThis()) this.receiver.printExpression(0, output).append('.');
if (this.typeArguments != null) {
output.append('<');
int max = this.typeArguments.length - 1;
for (int j = 0; j < max; j++) {
this.typeArguments[j].print(0, output);
output.append(", ");//$NON-NLS-1$
}
this.typeArguments[max].print(0, output);
output.append('>');
}
output.append(this.selector).append('(') ;
if (this.arguments != null) {
for (int i = 0; i < this.arguments.length ; i ++) {
if (i > 0) output.append(", "); //$NON-NLS-1$
this.arguments[i].printExpression(0, output);
}
}
return output.append(')');
}
@Override
public TypeBinding resolveType(BlockScope scope) {
// Answer the signature return type, answers PolyTypeBinding if a poly expression and there is no target type
// Base type promotion
if (this.constant != Constant.NotAConstant) {
this.constant = Constant.NotAConstant;
long sourceLevel = scope.compilerOptions().sourceLevel;
boolean receiverCast = false;
if (this.receiver instanceof CastExpression) {
this.receiver.bits |= ASTNode.DisableUnnecessaryCastCheck; // will check later on
receiverCast = true;
}
this.actualReceiverType = this.receiver.resolveType(scope);
if (this.actualReceiverType instanceof InferenceVariable) {
return null; // not yet ready for resolving
}
this.receiverIsType = this.receiver.isType();
if (receiverCast && this.actualReceiverType != null) {
// due to change of declaring class with receiver type, only identity cast should be notified
TypeBinding resolvedType2 = ((CastExpression)this.receiver).expression.resolvedType;
if (TypeBinding.equalsEquals(resolvedType2, this.actualReceiverType)) {
if (!scope.environment().usesNullTypeAnnotations() || !NullAnnotationMatching.analyse(this.actualReceiverType, resolvedType2, -1).isAnyMismatch()) {
scope.problemReporter().unnecessaryCast((CastExpression) this.receiver);
}
}
}
// resolve type arguments (for generic constructor call)
if (this.typeArguments != null) {
int length = this.typeArguments.length;
this.argumentsHaveErrors = sourceLevel < ClassFileConstants.JDK1_5; // typeChecks all arguments
this.genericTypeArguments = new TypeBinding[length];
for (int i = 0; i < length; i++) {
TypeReference typeReference = this.typeArguments[i];
if ((this.genericTypeArguments[i] = typeReference.resolveType(scope, true /* check bounds*/, Binding.DefaultLocationTypeArgument)) == null) {
this.argumentsHaveErrors = true;
}
if (this.argumentsHaveErrors && typeReference instanceof Wildcard) {
scope.problemReporter().illegalUsageOfWildcard(typeReference);
}
}
if (this.argumentsHaveErrors) {
if (this.arguments != null) { // still attempt to resolve arguments
for (Expression argument : this.arguments) {
argument.resolveType(scope);
}
}
return null;
}
}
// will check for null after args are resolved
if (this.arguments != null) {
this.argumentsHaveErrors = false; // typeChecks all arguments
int length = this.arguments.length;
this.argumentTypes = new TypeBinding[length];
for (int i = 0; i < length; i++){
Expression argument = this.arguments[i];
if (this.arguments[i].resolvedType != null)
scope.problemReporter().genericInferenceError("Argument was unexpectedly found resolved", this); //$NON-NLS-1$
if (argument instanceof CastExpression) {
argument.bits |= ASTNode.DisableUnnecessaryCastCheck; // will check later on
this.argsContainCast = true;
}
argument.setExpressionContext(INVOCATION_CONTEXT);
if ((this.argumentTypes[i] = argument.resolveType(scope)) == null){
this.argumentsHaveErrors = true;
}
}
if (this.argumentsHaveErrors) {
if (this.actualReceiverType instanceof ReferenceBinding) {
// record a best guess, for clients who need hint about possible method match
TypeBinding[] pseudoArgs = new TypeBinding[length];
for (int i = length; --i >= 0;)
pseudoArgs[i] = this.argumentTypes[i] == null ? TypeBinding.NULL : this.argumentTypes[i]; // replace args with errors with null type
this.binding = this.receiver.isImplicitThis() ?
scope.getImplicitMethod(this.selector, pseudoArgs, this) :
scope.findMethod((ReferenceBinding) this.actualReceiverType, this.selector, pseudoArgs, this, false);
if (this.binding != null && !this.binding.isValidBinding()) {
MethodBinding closestMatch = ((ProblemMethodBinding)this.binding).closestMatch;
// record the closest match, for clients who may still need hint about possible method match
if (closestMatch != null) {
if (closestMatch.original().typeVariables != Binding.NO_TYPE_VARIABLES) { // generic method
// shouldn't return generic method outside its context, rather convert it to raw method (175409)
closestMatch = scope.environment().createParameterizedGenericMethod(closestMatch.original(), (RawTypeBinding)null);
}
this.binding = closestMatch;
MethodBinding closestMatchOriginal = closestMatch.original();
if (closestMatchOriginal.isOrEnclosedByPrivateType() && !scope.isDefinedInMethod(closestMatchOriginal)) {
// ignore cases where method is used from within inside itself (e.g. direct recursions)
closestMatchOriginal.modifiers |= ExtraCompilerModifiers.AccLocallyUsed;
}
}
}
}
return null;
}
}
if (this.actualReceiverType == null) {
return null;
}
// base type cannot receive any message
if (this.actualReceiverType.isBaseType()) {
scope.problemReporter().errorNoMethodFor(this, this.actualReceiverType, this.argumentTypes);
return null;
}
}
if (this.argumentsHaveErrors) {
return null;
}
TypeBinding methodType = findMethodBinding(scope);
if (methodType != null && methodType.isPolyType()) {
this.resolvedType = this.binding.returnType.capture(scope, this.sourceStart, this.sourceEnd);
return methodType;
}
if (!this.binding.isValidBinding()) {
if (this.binding.declaringClass == null) {
if (this.actualReceiverType instanceof ReferenceBinding) {
this.binding.declaringClass = (ReferenceBinding) this.actualReceiverType;
} else {
scope.problemReporter().errorNoMethodFor(this, this.actualReceiverType, this.argumentTypes);
return null;
}
}
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=245007 avoid secondary errors in case of
// missing super type for anonymous classes ...
ReferenceBinding declaringClass = this.binding.declaringClass;
boolean avoidSecondary = declaringClass != null &&
declaringClass.isAnonymousType() &&
declaringClass.superclass() instanceof MissingTypeBinding;
if (!avoidSecondary)
scope.problemReporter().invalidMethod(this, this.binding, scope);
MethodBinding closestMatch = ((ProblemMethodBinding)this.binding).closestMatch;
switch (this.binding.problemId()) {
case ProblemReasons.Ambiguous :
break; // no resilience on ambiguous
case ProblemReasons.InferredApplicableMethodInapplicable:
case ProblemReasons.InvocationTypeInferenceFailure:
// Grabbing the closest match improves error reporting in nested invocation contexts
if (this.expressionContext != INVOCATION_CONTEXT)
break;
//$FALL-THROUGH$
case ProblemReasons.NotVisible :
case ProblemReasons.NonStaticReferenceInConstructorInvocation :
case ProblemReasons.NonStaticReferenceInStaticContext :
case ProblemReasons.ReceiverTypeNotVisible :
case ProblemReasons.ParameterBoundMismatch :
// only steal returnType in cases listed above
if (closestMatch != null) this.resolvedType = closestMatch.returnType;
break;
case ProblemReasons.ContradictoryNullAnnotations :
if (closestMatch != null && closestMatch.returnType != null)
this.resolvedType = closestMatch.returnType.withoutToplevelNullAnnotation();
break;
}
// record the closest match, for clients who may still need hint about possible method match
if (closestMatch != null) {
this.binding = closestMatch;
MethodBinding closestMatchOriginal = closestMatch.original();
if (closestMatchOriginal.isOrEnclosedByPrivateType() && !scope.isDefinedInMethod(closestMatchOriginal)) {
// ignore cases where method is used from within inside itself (e.g. direct recursions)
closestMatchOriginal.modifiers |= ExtraCompilerModifiers.AccLocallyUsed;
}
}
return (this.resolvedType != null && (this.resolvedType.tagBits & TagBits.HasMissingType) == 0)
? this.resolvedType
: null;
}
final CompilerOptions compilerOptions = scope.compilerOptions();
if (compilerOptions.complianceLevel <= ClassFileConstants.JDK1_6
&& this.binding.isPolymorphic()) {
scope.problemReporter().polymorphicMethodNotBelow17(this);
return null;
}
if (compilerOptions.isAnnotationBasedNullAnalysisEnabled) {
ImplicitNullAnnotationVerifier.ensureNullnessIsKnown(this.binding, scope);
if (compilerOptions.sourceLevel >= ClassFileConstants.JDK1_8) {
if (this.binding instanceof ParameterizedGenericMethodBinding && this.typeArguments != null) {
TypeVariableBinding[] typeVariables = this.binding.original().typeVariables();
for (int i = 0; i < this.typeArguments.length; i++)
this.typeArguments[i].checkNullConstraints(scope, (ParameterizedGenericMethodBinding) this.binding, typeVariables, i);
}
}
}
if (this.binding.isPolymorphic()) {
boolean resultDetermined = compilerOptions.sourceLevel >= ClassFileConstants.JDK9
&& (this.binding.returnType == TypeBinding.VOID
|| this.binding.returnType.id != TypeIds.T_JavaLangObject);
if (!resultDetermined && ((this.bits & ASTNode.InsideExpressionStatement) != 0)) {
// we only set the return type to be void if this method invocation is used inside an expression statement
this.binding = scope.environment().updatePolymorphicMethodReturnType((PolymorphicMethodBinding) this.binding, TypeBinding.VOID);
}
}
if ((this.binding.tagBits & TagBits.HasMissingType) != 0) {
scope.problemReporter().missingTypeInMethod(this, this.binding);
}