/*
    * 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.view.facelets.el;
  
  import javax.el.ELContext;
  import javax.el.ValueExpression;
  import javax.el.ValueReference;
  import javax.faces.FacesWrapper;
  import javax.faces.context.FacesContext;
  import javax.faces.view.Location;
  
  /**
   * 
   * @author Leonardo Uribe 
   */
  public class ResourceLocationValueExpression extends LocationValueExpression implements FacesWrapper<ValueExpression>
  {
      
      private static final long serialVersionUID = -5636849184764526288L;
      
      public ResourceLocationValueExpression()
      {
          super();
      }
      
      public ResourceLocationValueExpression(Location location, ValueExpression delegate)
      {
          super(location, delegate);
      }
      
      @Override
      public Class<?> getType(ELContext context)
      {
          FacesContext facesContext = (FacesContext) context.getContext(FacesContext.class);
          ResourceELUtils.saveResourceLocationForResolver(facesContext, location);
          try
          {
              return delegate.getType(context);
          }
          finally
          {
              ResourceELUtils.removeResourceLocationForResolver(facesContext);
          }
      }
  
      @Override
      public Object getValue(ELContext context)
      {
          FacesContext facesContext = (FacesContext) context.getContext(FacesContext.class);
          ResourceELUtils.saveResourceLocationForResolver(facesContext, location);
          try
          {
              return delegate.getValue(context);
          }
          finally
          {
              ResourceELUtils.removeResourceLocationForResolver(facesContext);
          }
      }
  
      @Override
      public boolean isReadOnly(ELContext context)
      {
          FacesContext facesContext = (FacesContext) context.getContext(FacesContext.class);
          ResourceELUtils.saveResourceLocationForResolver(facesContext, location);
          try
          {
              return delegate.isReadOnly(context);
          }
          finally
          {
              ResourceELUtils.removeResourceLocationForResolver(facesContext);
          }
      }
  
      @Override
      public void setValue(ELContext context, Object value)
      {
          FacesContext facesContext = (FacesContext) context.getContext(FacesContext.class);
          ResourceELUtils.saveResourceLocationForResolver(facesContext, location);
          try
          {
              delegate.setValue(context, value);
         }
         finally
         {
             ResourceELUtils.removeResourceLocationForResolver(facesContext);
         }
     }
 
     @Override
     public boolean equals(Object obj)
     {
         return delegate.equals(obj);
     }
 
     @Override
     public String getExpressionString()
     {
         return delegate.getExpressionString();
     }
 
     @Override
     public int hashCode()
     {
         return delegate.hashCode();
     }
 
     @Override
     public boolean isLiteralText()
     {
         return delegate.isLiteralText();
     }
 
     @Override
     public ValueExpression getWrapped()
     {
         return delegate;
     }
     
     @Override
     public ValueReference getValueReference(ELContext context)
     {
         FacesContext facesContext = (FacesContext) context.getContext(FacesContext.class);
         ResourceELUtils.saveResourceLocationForResolver(facesContext, location);
         try
         {
             return delegate.getValueReference(context);
         }
         finally
         {
             ResourceELUtils.removeResourceLocationForResolver(facesContext);
         }
     }
 }