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 */ 017package org.apache.commons.configuration2.tree; 018 019import java.io.PrintStream; 020import java.util.Map; 021 022/** 023 * Utility methods. 024 * 025 * @since 1.7 026 */ 027public final class TreeUtils 028{ 029 /** Prevent creating this class. */ 030 private TreeUtils() 031 { 032 } 033 034 /** 035 * Print out the data in the configuration. 036 * @param stream The OutputStream. 037 * @param result The root node of the tree. 038 */ 039 public static void printTree(final PrintStream stream, final ImmutableNode result) 040 { 041 if (stream != null) 042 { 043 printTree(stream, "", result); 044 } 045 } 046 047 private static void printTree(final PrintStream stream, final String indent, final ImmutableNode result) 048 { 049 final StringBuilder buffer = new StringBuilder(indent).append("<").append(result.getNodeName()); 050 for (final Map.Entry<String, Object> e : result.getAttributes().entrySet()) 051 { 052 buffer.append(' ').append(e.getKey()).append("='").append(e.getValue()).append("'"); 053 } 054 buffer.append(">"); 055 stream.print(buffer.toString()); 056 if (result.getValue() != null) 057 { 058 stream.print(result.getValue()); 059 } 060 boolean newline = false; 061 if (!result.getChildren().isEmpty()) 062 { 063 stream.print("\n"); 064 for (final ImmutableNode child : result.getChildren()) 065 { 066 printTree(stream, indent + " ", child); 067 } 068 newline = true; 069 } 070 if (newline) 071 { 072 stream.print(indent); 073 } 074 stream.println("</" + result.getNodeName() + ">"); 075 } 076}