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
|
/*
* Copyright © 2009 Reinier Zwitserloot and Roel Spilker.
*
* 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.PKG.*;
import java.lang.reflect.Modifier;
import lombok.Synchronized;
import lombok.core.AnnotationValues;
import lombok.core.AST.Kind;
import lombok.eclipse.Eclipse;
import lombok.eclipse.EclipseAnnotationHandler;
import lombok.eclipse.EclipseAST.Node;
import lombok.eclipse.handlers.PKG.MemberExistsResult;
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.IntLiteral;
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</code> annotation for eclipse.
*/
@ProviderFor(EclipseAnnotationHandler.class)
public class HandleSynchronized implements EclipseAnnotationHandler<Synchronized> {
private static final char[] INSTANCE_LOCK_NAME = "$lock".toCharArray();
private static final char[] STATIC_LOCK_NAME = "$LOCK".toCharArray();
@Override public boolean handle(AnnotationValues<Synchronized> annotation, Annotation source, Node annotationNode) {
int p1 = source.sourceStart -1;
int p2 = source.sourceStart -2;
long pos = (((long)p1) << 32) | p2;
Node methodNode = annotationNode.up();
if ( methodNode == null || methodNode.getKind() != Kind.METHOD || !(methodNode.get() instanceof MethodDeclaration) ) {
annotationNode.addError("@Synchronized is legal only on methods.");
return true;
}
MethodDeclaration method = (MethodDeclaration)methodNode.get();
if ( method.isAbstract() ) {
annotationNode.addError("@Synchronized is legal only on concrete methods.");
return true;
}
char[] lockName = annotation.getInstance().value().toCharArray();
boolean autoMake = false;
if ( lockName.length == 0 ) {
autoMake = true;
lockName = method.isStatic() ? STATIC_LOCK_NAME : INSTANCE_LOCK_NAME;
}
if ( fieldExists(new String(lockName), methodNode) == MemberExistsResult.NOT_EXISTS ) {
if ( !autoMake ) {
annotationNode.addError("The field " + new String(lockName) + " does not exist.");
return true;
}
FieldDeclaration fieldDecl = new FieldDeclaration(lockName, 0, -1);
Eclipse.setGeneratedBy(fieldDecl, source);
fieldDecl.declarationSourceEnd = -1;
fieldDecl.modifiers = (method.isStatic() ? Modifier.STATIC : 0) | Modifier.FINAL | Modifier.PRIVATE;
//We use 'new Object[0];' because quite unlike 'new Object();', empty arrays *ARE* serializable!
ArrayAllocationExpression arrayAlloc = new ArrayAllocationExpression();
Eclipse.setGeneratedBy(arrayAlloc, source);
arrayAlloc.dimensions = new Expression[] { new IntLiteral(new char[] { '0' }, 0, 0) };
Eclipse.setGeneratedBy(arrayAlloc.dimensions[0], source);
arrayAlloc.type = new QualifiedTypeReference(TypeConstants.JAVA_LANG_OBJECT, new long[] { 0, 0, 0 });
Eclipse.setGeneratedBy(arrayAlloc.type, source);
fieldDecl.type = new QualifiedTypeReference(TypeConstants.JAVA_LANG_OBJECT, new long[] { 0, 0, 0 });
Eclipse.setGeneratedBy(fieldDecl.type, source);
fieldDecl.initialization = arrayAlloc;
injectField(annotationNode.up().up(), fieldDecl);
}
if ( method.statements == null ) return false;
Block block = new Block(0);
Eclipse.setGeneratedBy(block, source);
block.statements = method.statements;
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);
Eclipse.setGeneratedBy(thisReference, source);
((FieldReference)lockVariable).receiver = thisReference;
}
Eclipse.setGeneratedBy(lockVariable, source);
method.statements = new Statement[] {
new SynchronizedStatement(lockVariable, block, 0, 0)
};
Eclipse.setGeneratedBy(method.statements[0], source);
methodNode.rebuild();
return true;
}
}
|
