| /******************************************************************************* |
| * Copyright (c) 2000, 2004 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jdt.internal.compiler.flow; |
| |
| import org.eclipse.jdt.core.compiler.CharOperation; |
| import org.eclipse.jdt.internal.compiler.ast.ASTNode; |
| import org.eclipse.jdt.internal.compiler.codegen.Label; |
| import org.eclipse.jdt.internal.compiler.lookup.BlockScope; |
| |
| /** |
| * Reflects the context of code analysis, keeping track of enclosing |
| * try statements, exception handlers, etc... |
| */ |
| public class LabelFlowContext extends SwitchFlowContext { |
| |
| public char[] labelName; |
| |
| public LabelFlowContext(FlowContext parent, ASTNode associatedNode, char[] labelName, Label breakLabel, BlockScope scope) { |
| super(parent, associatedNode, breakLabel); |
| this.labelName = labelName; |
| checkLabelValidity(scope); |
| } |
| |
| void checkLabelValidity(BlockScope scope) { |
| // check if label was already defined above |
| FlowContext current = parent; |
| while (current != null) { |
| char[] currentLabelName; |
| if (((currentLabelName = current.labelName()) != null) |
| && CharOperation.equals(currentLabelName, labelName)) { |
| scope.problemReporter().alreadyDefinedLabel(labelName, associatedNode); |
| } |
| current = current.parent; |
| } |
| } |
| |
| public String individualToString() { |
| return "Label flow context [label:" + String.valueOf(labelName) + "]"; //$NON-NLS-2$ //$NON-NLS-1$ |
| } |
| |
| public char[] labelName() { |
| return labelName; |
| } |
| } |