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
|
/*
* Copyright (C) 2009-2012 The Project Lombok Authors.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package lombok.eclipse.handlers;
import static lombok.eclipse.handlers.EclipseHandlerUtil.*;
import java.lang.reflect.Modifier;
import lombok.Synchronized;
import lombok.core.AnnotationValues;
import lombok.core.AST.Kind;
import lombok.eclipse.DeferUntilPostDiet;
import lombok.eclipse.EclipseAnnotationHandler;
import lombok.eclipse.EclipseNode;
import org.eclipse.jdt.internal.compiler.ast.Annotation;
import org.eclipse.jdt.internal.compiler.ast.ArrayAllocationExpression;
import org.eclipse.jdt.internal.compiler.ast.Block;
import org.eclipse.jdt.internal.compiler.ast.Expression;
import org.eclipse.jdt.internal.compiler.ast.FieldDeclaration;
import org.eclipse.jdt.internal.compiler.ast.FieldReference;
import org.eclipse.jdt.internal.compiler.ast.MethodDeclaration;
import org.eclipse.jdt.internal.compiler.ast.QualifiedNameReference;
import org.eclipse.jdt.internal.compiler.ast.QualifiedTypeReference;
import org.eclipse.jdt.internal.compiler.ast.Statement;
import org.eclipse.jdt.internal.compiler.ast.SynchronizedStatement;
import org.eclipse.jdt.internal.compiler.ast.ThisReference;
import org.eclipse.jdt.internal.compiler.lookup.TypeConstants;
import org.mangosdk.spi.ProviderFor;
/**
* Handles the {@code lombok.Synchronized} annotation for eclipse.
*/
@ProviderFor(EclipseAnnotationHandler.class)
@DeferUntilPostDiet
public class HandleSynchronized extends EclipseAnnotationHandler<Synchronized> {
private static final char[] INSTANCE_LOCK_NAME = "$lock".toCharArray();
private static final char[] STATIC_LOCK_NAME = "$LOCK".toCharArray();
@Override public void preHandle(AnnotationValues<Synchronized> annotation, Annotation source, EclipseNode annotationNode) {
EclipseNode methodNode = annotationNode.up();
if (methodNode == null || methodNode.getKind() != Kind.METHOD || !(methodNode.get() instanceof MethodDeclaration)) return;
MethodDeclaration method = (MethodDeclaration)methodNode.get();
if (method.isAbstract()) return;
createLockField(annotation, annotationNode, method.isStatic(), false);
}
private char[] createLockField(AnnotationValues<Synchronized> annotation, EclipseNode annotationNode, boolean isStatic, boolean reportErrors) {
char[] lockName = annotation.getInstance().value().toCharArray();
Annotation source = (Annotation) annotationNode.get();
boolean autoMake = false;
if (lockName.length == 0) {
autoMake = true;
lockName = isStatic ? STATIC_LOCK_NAME : INSTANCE_LOCK_NAME;
}
if (fieldExists(new String(lockName), annotationNode) == MemberExistsResult.NOT_EXISTS) {
if (!autoMake) {
if (reportErrors) annotationNode.addError(String.format("The field %s does not exist.", new String(lockName)));
return null;
}
FieldDeclaration fieldDecl = new FieldDeclaration(lockName, 0, -1);
setGeneratedBy(fieldDecl, source);
fieldDecl.declarationSourceEnd = -1;
fieldDecl.modifiers = (isStatic ? Modifier.STATIC : 0) | Modifier.FINAL | Modifier.PRIVATE;
//We use 'new Object[0];' because unlike 'new Object();', empty arrays *ARE* serializable!
ArrayAllocationExpression arrayAlloc = new ArrayAllocationExpression();
setGeneratedBy(arrayAlloc, source);
arrayAlloc.dimensions = new Expression[] { makeIntLiteral("0".toCharArray(), source) };
arrayAlloc.type = new QualifiedTypeReference(TypeConstants.JAVA_LANG_OBJECT, new long[] { 0, 0, 0 });
setGeneratedBy(arrayAlloc.type, source);
fieldDecl.type = new QualifiedTypeReference(TypeConstants.JAVA_LANG_OBJECT, new long[] { 0, 0, 0 });
setGeneratedBy(fieldDecl.type, source);
fieldDecl.initialization = arrayAlloc;
// TODO temporary workaround for issue 217. http://code.google.com/p/projectlombok/issues/detail?id=217
// injectFieldSuppressWarnings(annotationNode.up().up(), fieldDecl);
injectField(annotationNode.up().up(), fieldDecl);
}
return lockName;
}
@Override public void handle(AnnotationValues<Synchronized> annotation, Annotation source, EclipseNode annotationNode) {
int p1 = source.sourceStart -1;
int p2 = source.sourceStart -2;
long pos = (((long)p1) << 32) | p2;
EclipseNode methodNode = annotationNode.up();
if (methodNode == null || methodNode.getKind() != Kind.METHOD || !(methodNode.get() instanceof MethodDeclaration)) {
annotationNode.addError("@Synchronized is legal only on methods.");
return;
}
MethodDeclaration method = (MethodDeclaration)methodNode.get();
if (method.isAbstract()) {
annotationNode.addError("@Synchronized is legal only on concrete methods.");
return;
}
char[] lockName = createLockField(annotation, annotationNode, method.isStatic(), true);
if (lockName == null) return;
if (method.statements == null) return;
Block block = new Block(0);
setGeneratedBy(block, source);
block.statements = method.statements;
// Positions for in-method generated nodes are special
block.sourceEnd = method.bodyEnd;
block.sourceStart = method.bodyStart;
Expression lockVariable;
if (method.isStatic()) lockVariable = new QualifiedNameReference(new char[][] {
methodNode.up().getName().toCharArray(), lockName }, new long[] { pos, pos }, p1, p2);
else {
lockVariable = new FieldReference(lockName, pos);
ThisReference thisReference = new ThisReference(p1, p2);
setGeneratedBy(thisReference, source);
((FieldReference)lockVariable).receiver = thisReference;
}
setGeneratedBy(lockVariable, source);
method.statements = new Statement[] {
new SynchronizedStatement(lockVariable, block, 0, 0)
};
// Positions for in-method generated nodes are special
method.statements[0].sourceEnd = method.bodyEnd;
method.statements[0].sourceStart = method.bodyStart;
setGeneratedBy(method.statements[0], source);
methodNode.rebuild();
}
}
|
