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 }