001    // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
002    // for details. All rights reserved. Use of this source code is governed by a
003    // BSD-style license that can be found in the LICENSE file.
004    
005    package com.google.dart.compiler.backend.js.ast;
006    
007    import com.google.dart.compiler.common.Symbol;
008    import com.google.dart.compiler.util.AstUtil;
009    import org.jetbrains.annotations.NotNull;
010    
011    /**
012     * Represents a JavaScript label statement.
013     */
014    public class JsLabel extends SourceInfoAwareJsNode implements JsStatement, HasName {
015        private final JsName label;
016    
017        private JsStatement statement;
018    
019        public JsLabel(JsName label) {
020            this.label = label;
021        }
022    
023        public JsLabel(JsName label, JsStatement statement) {
024            this.label = label;
025            this.statement = statement;
026        }
027    
028        @Override
029        public JsName getName() {
030            return label;
031        }
032    
033        @Override
034        public Symbol getSymbol() {
035            return label;
036        }
037    
038        public JsStatement getStatement() {
039            return statement;
040        }
041    
042        public void setStatement(JsStatement statement) {
043            this.statement = statement;
044        }
045    
046        @Override
047        public void accept(JsVisitor v) {
048            v.visitLabel(this);
049        }
050    
051        @Override
052        public void acceptChildren(JsVisitor visitor) {
053            visitor.accept(statement);
054        }
055    
056        @Override
057        public void traverse(JsVisitorWithContext v, JsContext ctx) {
058            if (v.visit(this, ctx)) {
059                statement = v.acceptStatement(statement);
060            }
061            v.endVisit(this, ctx);
062        }
063    
064        @NotNull
065        @Override
066        public JsLabel deepCopy() {
067            return new JsLabel(label, AstUtil.deepCopy(statement.deepCopy())).withMetadataFrom(this);
068        }
069    }