01: /**
02: *
03: * Copyright 2005 Jeremy Rayner
04: *
05: * Licensed under the Apache License, Version 2.0 (the "License");
06: * you may not use this file except in compliance with the License.
07: * You may obtain a copy of the License at
08: *
09: * 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: **/package org.codehaus.groovy.antlr.treewalker;
18:
19: import java.io.PrintStream;
20:
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: 4032 $
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: }
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