1 /*** 2 * 3 * Copyright 2005 Jeremy Rayner 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 * 17 **/ 18 package org.codehaus.groovy.antlr.treewalker; 19 20 import java.io.PrintStream; 21 import org.codehaus.groovy.antlr.GroovySourceAST; 22 23 /*** 24 * A simple antlr AST visitor that outputs the tokenName of each node in a pseudo xml style. 25 * 26 * @author <a href="mailto:groovy@ross-rayner.com">Jeremy Rayner</a> 27 * @version $Revision: 1.1 $ 28 */ 29 30 public class NodePrinter extends VisitorAdapter { 31 private String[] tokenNames; 32 private PrintStream out; 33 34 /*** 35 * A visitor that prints a pseudo xml output to the supplied PrintStream 36 * @param out supplied PrintStream to output nodes to 37 * @param tokenNames an array of token names to use 38 */ 39 public NodePrinter(PrintStream out,String[] tokenNames) { 40 this.tokenNames = tokenNames; 41 this.out = out; 42 } 43 44 public void visitDefault(GroovySourceAST t,int visit) { 45 if (visit == OPENING_VISIT) { 46 out.print("<"+ tokenNames[t.getType()] + ">"); 47 } else { 48 out.print("</" + tokenNames[t.getType()] + ">"); 49 } 50 } 51 52 }