001    /**
002     *
003     * Copyright 2005 Jeremy Rayner
004     *
005     * Licensed under the Apache License, Version 2.0 (the "License");
006     * you may not use this file except in compliance with the License.
007     * You may obtain a copy of the License at
008     *
009     * http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     *
017     **/
018    package org.codehaus.groovy.antlr.treewalker;
019    
020    import org.codehaus.groovy.antlr.GroovySourceAST;
021    
022    /**
023     * A simple preorder traversal over the supplied antlr AST.
024     *
025     * @author <a href="mailto:groovy@ross-rayner.com">Jeremy Rayner</a>
026     * @version $Revision: 3626 $
027     */
028    public class PreOrderTraversal extends TraversalHelper {
029        
030        /**
031         * A simple preorder traversal over the supplied antlr AST.
032         * @param visitor the Visitor to call for each node visited 
033         */
034        public PreOrderTraversal(Visitor visitor) {
035            super(visitor);
036        }
037    
038        public void accept(GroovySourceAST currentNode) {
039            push(currentNode);
040            openingVisit(currentNode);
041            acceptChildren(currentNode);
042            closingVisit(currentNode);
043            pop();
044        }
045    }