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 /** Prevent creating this class. */ 029 private TreeUtils() { 030 } 031 032 /** 033 * Print out the data in the configuration. 034 * 035 * @param stream The OutputStream. 036 * @param result The root node of the tree. 037 */ 038 public static void printTree(final PrintStream stream, final ImmutableNode result) { 039 if (stream != null) { 040 printTree(stream, "", result); 041 } 042 } 043 044 private static void printTree(final PrintStream stream, final String indent, final ImmutableNode result) { 045 final StringBuilder buffer = new StringBuilder(indent).append("<").append(result.getNodeName()); 046 for (final Map.Entry<String, Object> e : result.getAttributes().entrySet()) { 047 buffer.append(' ').append(e.getKey()).append("='").append(e.getValue()).append("'"); 048 } 049 buffer.append(">"); 050 stream.print(buffer.toString()); 051 if (result.getValue() != null) { 052 stream.print(result.getValue()); 053 } 054 boolean newline = false; 055 if (!result.getChildren().isEmpty()) { 056 stream.print("\n"); 057 for (final ImmutableNode child : result) { 058 printTree(stream, indent + " ", child); 059 } 060 newline = true; 061 } 062 if (newline) { 063 stream.print(indent); 064 } 065 stream.println("</" + result.getNodeName() + ">"); 066 } 067}