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 java.util.Stack;
22
23 import org.codehaus.groovy.antlr.GroovySourceAST;
24
25 /***
26 * A simple antlr AST visitor that outputs the tokenName of each node in a pseudo xml style.
27 *
28 * @author <a href="mailto:groovy@ross-rayner.com">Jeremy Rayner</a>
29 * @version $Revision: 1.2 $
30 */
31
32 public class NodePrinter extends VisitorAdapter {
33 private String[] tokenNames;
34 private PrintStream out;
35
36 /***
37 * A visitor that prints a pseudo xml output to the supplied PrintStream
38 * @param out supplied PrintStream to output nodes to
39 * @param tokenNames an array of token names to use
40 */
41 public NodePrinter(PrintStream out,String[] tokenNames) {
42 this.tokenNames = tokenNames;
43 this.out = out;
44 }
45
46 public void visitDefault(GroovySourceAST t,int visit) {
47 if (visit == OPENING_VISIT) {
48 out.print("<"+ tokenNames[t.getType()] + ">");
49 } else {
50 out.print("</" + tokenNames[t.getType()] + ">");
51 }
52 }
53 }