/*
    * 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.maven.lifecycle;
  
  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);
      }
  }