/* * 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.apache.pig.parser; import org.antlr.runtime.tree.CommonTree; public class TreePrinter { public static void printTree(CommonTree tree, int indent) { if( tree != null ) { StringBuilder sb = new StringBuilder(); for ( int i = 0; i < indent; i++ ) sb = sb.append( " " ); System.out.println( sb + tree.getText() ); for ( int i = 0; i < tree.getChildCount(); i++ ) { printTree( (CommonTree)tree.getChild( i ), indent + 1 ); } } } }