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 org.jetbrains.annotations.NotNull;
008    
009    /**
010     * One independently loadable fragment of a {@link JsProgram}.
011     */
012    public class JsProgramFragment extends SourceInfoAwareJsNode {
013        private final JsGlobalBlock globalBlock;
014    
015        public JsProgramFragment() {
016            globalBlock = new JsGlobalBlock();
017        }
018    
019        public JsBlock getGlobalBlock() {
020            return globalBlock;
021        }
022    
023        @Override
024        public void accept(JsVisitor v) {
025            v.visitProgramFragment(this);
026        }
027    
028        @Override
029        public void acceptChildren(JsVisitor visitor) {
030            visitor.accept(globalBlock);
031        }
032    
033        @Override
034        public void traverse(JsVisitorWithContext v, JsContext ctx) {
035            if (v.visit(this, ctx)) {
036                v.accept(globalBlock);
037            }
038            v.endVisit(this, ctx);
039        }
040    
041        @NotNull
042        @Override
043        public JsProgramFragment deepCopy() {
044            throw new UnsupportedOperationException();
045        }
046    }