/*
    * 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.myfaces.el;
  
  import javax.el.ELContext;
  import javax.faces.context.FacesContext;
  import javax.faces.el.EvaluationException;
  import javax.faces.el.PropertyNotFoundException;
  import javax.faces.el.PropertyResolver;
  
  /**
   * Default PropertyResolver.  See JSF 1.2 spec section 5.8.2
   *
   * @author Stan Silvert
   */
  public final class NullPropertyResolver extends PropertyResolver
  {
  
      /** Creates a new instance of NullPropertyResolver */
      public NullPropertyResolver()
      {
      }
  
      @Override
      public boolean isReadOnly(Object base, int index) throws EvaluationException, PropertyNotFoundException
      {
          elContext().setPropertyResolved(false);
          return false;
      }
  
      @Override
      public boolean isReadOnly(Object base, Object property) throws EvaluationException, PropertyNotFoundException
      {
          elContext().setPropertyResolved(false);
          return false;
      }
  
      @Override
      public Object getValue(Object base, int index) throws EvaluationException, PropertyNotFoundException
      {
          elContext().setPropertyResolved(false);
          return null;
      }
  
      @Override
      public Object getValue(Object base, Object property) throws EvaluationException, PropertyNotFoundException
      {
          elContext().setPropertyResolved(false);
          return null;
      }
  
      @Override
      public Class getType(Object base, int index) throws EvaluationException, PropertyNotFoundException
      {
          elContext().setPropertyResolved(false);
          return null;
      }
  
      @Override
      public Class getType(Object base, Object property) throws EvaluationException, PropertyNotFoundException
      {
          elContext().setPropertyResolved(false);
          return null;
      }
  
      @Override
      public void setValue(Object base, Object property, Object value)
              throws EvaluationException, PropertyNotFoundException
      {
          elContext().setPropertyResolved(false);
      }
  
      @Override
      public void setValue(Object base, int index, Object value) throws EvaluationException, PropertyNotFoundException
      {
          elContext().setPropertyResolved(false);
      }
  
      private ELContext elContext()
      {
          return FacesContext.getCurrentInstance().getELContext();
      }
  
 }