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authorReinier Zwitserloot <reinier@tipit.to>2009-11-25 07:32:49 +0100
committerReinier Zwitserloot <reinier@tipit.to>2009-11-25 07:32:49 +0100
commit1a0e611a9c5e1ee518670647ce1a44beae559b44 (patch)
treee5ef8f671bc6688f486e874d4e2e1a7813e4f0b2 /src/core/lombok/eclipse/handlers/HandleSynchronized.java
parent7fd947ea40c25dad9ee543ebc4b92de9a2e05efc (diff)
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Refactored the source folders.
Diffstat (limited to 'src/core/lombok/eclipse/handlers/HandleSynchronized.java')
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diff --git a/src/core/lombok/eclipse/handlers/HandleSynchronized.java b/src/core/lombok/eclipse/handlers/HandleSynchronized.java
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+/*
+ * 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.EclipseHandlerUtil.*;
+
+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.EclipseNode;
+import lombok.eclipse.handlers.EclipseHandlerUtil.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} 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, 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 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;
+ }
+}