package org.apache.maven.project.harness;
   
   /*
    * 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 java.util.ArrayList;
  import java.util.List;
  
  import org.apache.commons.jxpath.ri.QName;
  import org.apache.commons.jxpath.ri.compiler.NodeTest;
  import org.apache.commons.jxpath.ri.model.NodeIterator;
  import org.apache.commons.jxpath.ri.model.NodePointer;
  import org.codehaus.plexus.util.xml.Xpp3Dom;
  
  /**
   * A node pointer for JXPath to support <code>Xpp3Dom</code>.
   *
   * @author Benjamin Bentmann
   */
  class Xpp3DomNodePointer
      extends NodePointer
  {
  
      private Xpp3Dom node;
  
      public Xpp3DomNodePointer( Xpp3Dom node )
      {
          super( null );
          this.node = node;
      }
  
      public Xpp3DomNodePointer( NodePointer parent, Xpp3Dom node )
      {
          super( parent );
          this.node = node;
      }
  
      @Override
      public int compareChildNodePointers( NodePointer pointer1, NodePointer pointer2 )
      {
          Xpp3Dom node1 = (Xpp3Dom) pointer1.getBaseValue();
          Xpp3Dom node2 = (Xpp3Dom) pointer2.getBaseValue();
          if ( node1 == node2 )
          {
              return 0;
          }
          for ( int i = 0; i < node.getChildCount(); i++ )
          {
              Xpp3Dom child = node.getChild( i );
              if ( child == node1 )
              {
                  return -1;
              }
              if ( child == node2 )
              {
                  return 1;
              }
          }
          return 0;
      }
  
      @Override
      public Object getValue()
      {
          return getValue( node );
      }
  
      private static Object getValue( Xpp3Dom node )
      {
          if ( node.getValue() != null )
          {
              return node.getValue();
          }
          else
          {
              List<Object> children = new ArrayList<>();
              for ( int i = 0; i < node.getChildCount(); i++ )
              {
                  children.add( getValue( node.getChild( i ) ) );
              }
              return children;
          }
      }
 
     @Override
     public Object getBaseValue()
     {
         return node;
     }
 
     @Override
     public Object getImmediateNode()
     {
         return node;
     }
 
     @Override
     public int getLength()
     {
         return 1;
     }
 
     @Override
     public QName getName()
     {
         return new QName( null, node.getName() );
     }
 
     @Override
     public boolean isCollection()
     {
         return false;
     }
 
     @Override
     public boolean isLeaf()
     {
         return node.getChildCount() <= 0;
     }
 
     @Override
     public void setValue( Object value )
     {
         throw new UnsupportedOperationException();
     }
 
     @Override
     public NodeIterator childIterator( NodeTest test, boolean reverse, NodePointer startWith )
     {
         return new Xpp3DomNodeIterator( this, test, reverse, startWith );
     }
 
     @Override
     public NodeIterator attributeIterator( QName qname )
     {
         return new Xpp3DomAttributeIterator( this, qname );
     }
 
 }