package org.apache.maven.lifecycle;
   
   /*
    * 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.io.IOException;
  import java.util.Iterator;
  
  import org.apache.commons.jxpath.JXPathContext;
  import org.apache.commons.jxpath.JXPathNotFoundException;
  import org.apache.commons.jxpath.ri.JXPathContextReferenceImpl;
  import org.apache.maven.plugin.MojoExecution;
  import org.apache.maven.project.harness.Xpp3DomPointerFactory;
  
  public class MojoExecutionXPathContainer
  {
      private JXPathContext context;
  
      static
      {
          JXPathContextReferenceImpl.addNodePointerFactory( new Xpp3DomPointerFactory() );
      }
  
      public MojoExecutionXPathContainer( MojoExecution mojoExecution )
          throws IOException
      {
          context = JXPathContext.newContext( mojoExecution );
      }
  
  	public Iterator<?> getIteratorForXPathExpression( String expression )
      {
          return context.iterate( expression );
      }
  
      public boolean containsXPathExpression( String expression )
      {
          return context.getValue( expression ) != null;
      }
  
      public Object getValue( String expression )
      {
          try
          {
              return context.getValue( expression );
          }
          catch ( JXPathNotFoundException e )
          {
              return null;
          }
      }
  
      public boolean xPathExpressionEqualsValue( String expression, String value )
      {
          return context.getValue( expression ) != null && context.getValue( expression ).equals( value );
      }
  }