001 /* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 package org.apache.commons.configuration.tree; 018 019 import java.io.PrintStream; 020 import java.util.Iterator; 021 022 /** 023 * Utility methods. 024 * @author <a 025 * href="http://commons.apache.org/configuration/team-list.html">Commons 026 * Configuration team</a> 027 * @version $Id: TreeUtils.java 1206489 2011-11-26 16:43:03Z oheger $ 028 * @since 1.7 029 */ 030 public final class TreeUtils 031 { 032 /** Prevent creating this class. */ 033 private TreeUtils() 034 { 035 } 036 037 /** 038 * Print out the data in the configuration. 039 * @param stream The OutputStream. 040 * @param result The root node of the tree. 041 */ 042 public static void printTree(PrintStream stream, ConfigurationNode result) 043 { 044 if (stream != null) 045 { 046 printTree(stream, "", result); 047 } 048 } 049 050 private static void printTree(PrintStream stream, String indent, ConfigurationNode result) 051 { 052 StringBuffer buffer = new StringBuffer(indent).append("<").append(result.getName()); 053 Iterator<ConfigurationNode> iter = result.getAttributes().iterator(); 054 while (iter.hasNext()) 055 { 056 ConfigurationNode node = (ConfigurationNode) iter.next(); 057 buffer.append(" ").append(node.getName()).append("='").append(node.getValue()).append("'"); 058 } 059 buffer.append(">"); 060 stream.print(buffer.toString()); 061 if (result.getValue() != null) 062 { 063 stream.print(result.getValue()); 064 } 065 boolean newline = false; 066 if (result.getChildrenCount() > 0) 067 { 068 stream.print("\n"); 069 iter = result.getChildren().iterator(); 070 while (iter.hasNext()) 071 { 072 printTree(stream, indent + " ", (ConfigurationNode) iter.next()); 073 } 074 newline = true; 075 } 076 if (newline) 077 { 078 stream.print(indent); 079 } 080 stream.println("</" + result.getName() + ">"); 081 } 082 }