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1   /*
2    * Copyright 2003-2007 the original author or authors.
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *     http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  package org.codehaus.groovy.antlr.treewalker;
17  
18  import org.codehaus.groovy.antlr.GroovySourceAST;
19  
20  /**
21   * A simple preorder traversal over the supplied antlr AST.
22   *
23   * @author <a href="mailto:groovy@ross-rayner.com">Jeremy Rayner</a>
24   * @version $Revision: 6778 $
25   */
26  public class PreOrderTraversal extends TraversalHelper {
27      
28      /**
29       * A simple preorder traversal over the supplied antlr AST.
30       * @param visitor the Visitor to call for each node visited 
31       */
32      public PreOrderTraversal(Visitor visitor) {
33          super(visitor);
34      }
35  
36      public void accept(GroovySourceAST currentNode) {
37          push(currentNode);
38          openingVisit(currentNode);
39          acceptChildren(currentNode);
40          closingVisit(currentNode);
41          pop();
42      }
43  }