org.codehaus.groovy.antlr.treewalker.NodePrinter Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. 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;
import java.io.PrintStream;
/**
* A simple antlr AST visitor that outputs the tokenName of each node in a pseudo xml style.
*
* @author Jeremy Rayner
*/
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("");
}
}
}