Java tutorial
/* * 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.commons.configuration.tree; import java.io.PrintStream; import java.util.Iterator; /** * Utility methods. * @author <a * href="http://commons.apache.org/configuration/team-list.html">Commons * Configuration team</a> * @version $Id: TreeUtils.java 1301991 2012-03-17 20:18:02Z sebb $ * @since 1.7 */ public final class TreeUtils { /** Prevent creating this class. */ private TreeUtils() { } /** * Print out the data in the configuration. * @param stream The OutputStream. * @param result The root node of the tree. */ public static void printTree(PrintStream stream, ConfigurationNode result) { if (stream != null) { printTree(stream, "", result); } } private static void printTree(PrintStream stream, String indent, ConfigurationNode result) { StringBuffer buffer = new StringBuffer(indent).append("<").append(result.getName()); Iterator<ConfigurationNode> iter = result.getAttributes().iterator(); while (iter.hasNext()) { ConfigurationNode node = iter.next(); buffer.append(" ").append(node.getName()).append("='").append(node.getValue()).append("'"); } buffer.append(">"); stream.print(buffer.toString()); if (result.getValue() != null) { stream.print(result.getValue()); } boolean newline = false; if (result.getChildrenCount() > 0) { stream.print("\n"); iter = result.getChildren().iterator(); while (iter.hasNext()) { printTree(stream, indent + " ", iter.next()); } newline = true; } if (newline) { stream.print(indent); } stream.println("</" + result.getName() + ">"); } }