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 * @version $Id: TreeUtils.java 1842194 2018-09-27 22:24:23Z ggregory $ 026 * @since 1.7 027 */ 028public final class TreeUtils 029{ 030 /** Prevent creating this class. */ 031 private TreeUtils() 032 { 033 } 034 035 /** 036 * Print out the data in the configuration. 037 * @param stream The OutputStream. 038 * @param result The root node of the tree. 039 */ 040 public static void printTree(final PrintStream stream, final ImmutableNode result) 041 { 042 if (stream != null) 043 { 044 printTree(stream, "", result); 045 } 046 } 047 048 private static void printTree(final PrintStream stream, final String indent, final ImmutableNode result) 049 { 050 final StringBuilder buffer = new StringBuilder(indent).append("<").append(result.getNodeName()); 051 for (final Map.Entry<String, Object> e : result.getAttributes().entrySet()) 052 { 053 buffer.append(' ').append(e.getKey()).append("='").append(e.getValue()).append("'"); 054 } 055 buffer.append(">"); 056 stream.print(buffer.toString()); 057 if (result.getValue() != null) 058 { 059 stream.print(result.getValue()); 060 } 061 boolean newline = false; 062 if (!result.getChildren().isEmpty()) 063 { 064 stream.print("\n"); 065 for (final ImmutableNode child : result.getChildren()) 066 { 067 printTree(stream, indent + " ", child); 068 } 069 newline = true; 070 } 071 if (newline) 072 { 073 stream.print(indent); 074 } 075 stream.println("</" + result.getNodeName() + ">"); 076 } 077}