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Groovy example source code file (

This example Groovy source code file ( is included in the "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Groovy tags/keywords

io, nodeprinter, nodeprinter, opening_visit, printstream, printstream, string, string, visitoradapter, visitoradapter

The Groovy source code

 * Copyright 2003-2007 the original author or authors.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.
package org.codehaus.groovy.antlr.treewalker;


import org.codehaus.groovy.antlr.GroovySourceAST;

 * A simple antlr AST visitor that outputs the tokenName of each node in a pseudo xml style.
 * @author <a href="">Jeremy Rayner
 * @version $Revision: 6778 $

public class NodePrinter extends VisitorAdapter {
    private String[] tokenNames;
    private PrintStream out;

     * A visitor that prints a pseudo xml output to the supplied PrintStream
     * @param out supplied PrintStream to output nodes to
     * @param tokenNames an array of token names to use
    public NodePrinter(PrintStream out,String[] tokenNames) {
        this.tokenNames = tokenNames;
        this.out = out;

    public void visitDefault(GroovySourceAST t,int visit) {
        if (visit == OPENING_VISIT) {
            out.print("<"+ tokenNames[t.getType()] + ">");
        } else {
            out.print("</" + tokenNames[t.getType()] + ">");

Other Groovy examples (source code examples)

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