package org.apache.maven.plugin.antrun;
   
   /*
    * 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.
   */
  
  import org.codehaus.plexus.configuration.PlexusConfiguration;
  import org.codehaus.plexus.util.xml.PrettyPrintXMLWriter;
  import org.codehaus.plexus.util.xml.XMLWriter;
  
  import java.io.IOException;
  import java.io.Writer;
  
  /**
   * Write a plexus configuration to a stream
   * Note: This class was originally copied from plexus-container-default.  It is duplicated here
   * to maintain compatibility with both Maven 2.x and Maven 3.x.
   *
   */
  public class AntrunXmlPlexusConfigurationWriter
  {
  
      public void write( PlexusConfiguration configuration, Writer writer )
          throws IOException
      {
          int depth = 0;
  
          PrettyPrintXMLWriter xmlWriter = new PrettyPrintXMLWriter( writer );
          write( configuration, xmlWriter, depth );
      }
  
      private void write( PlexusConfiguration c, XMLWriter w, int depth )
          throws IOException
      {
          int count = c.getChildCount();
  
          if ( count == 0 )
          {
              writeTag( c, w, depth );
          }
          else
          {
              w.startElement( c.getName() );
              writeAttributes( c, w );
  
              for ( int i = 0; i < count; i++ )
              {
                  PlexusConfiguration child = c.getChild( i );
  
                  write( child, w, depth + 1 );
              }
              
              w.endElement();
          }
      }
  
      private void writeTag( PlexusConfiguration c, XMLWriter w, int depth )
          throws IOException
      {
          w.startElement( c.getName() );
          
          writeAttributes( c, w );
          
          String value = c.getValue( null );
          if ( value != null )
          {
              w.writeText( value );
          }
  
          w.endElement();
      }
  
      private void writeAttributes( PlexusConfiguration c, XMLWriter w )
          throws IOException
      {
          String[] names = c.getAttributeNames();
  
          for ( int i = 0; i < names.length; i++ )
          {
              w.addAttribute( names[i], c.getAttribute( names[i], null ) );
          }
      }
  
  }