/*

  * 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() + ">");

     }

 }