/*

  * $Id: NestedObjectDelegatePropertyAccessor.java 1049696 2010-12-15 20:30:10Z apetrelli $

  *

  * 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.tiles.ognl;

 import java.util.Map;

 import ognl.OgnlContext;

 import ognl.OgnlException;

 import ognl.PropertyAccessor;

 /**

  * Uses a {@link PropertyAccessor} as a delegate, but passing a nested object as

  * target.

  *

  * @param <T> The root object type from which the target object will be

  * extracted.

  * @since 2.2.0

  * @version $Rev: 1049696 $ $Date: 2010-12-16 07:30:10 +1100 (Thu, 16 Dec 2010) $

  */

 public class NestedObjectDelegatePropertyAccessor<T> implements

         PropertyAccessor {

     /**

      * The extractor of the nested object.

      *

      * @since 2.2.0

      */

     private NestedObjectExtractor<T> nestedObjectExtractor;

     /**

      * The delegated property accessor.

      *

      * @since 2.2.0

      */

     private PropertyAccessor propertyAccessor;

     /**

      * Constructor.

      *

      * @param nestedObjectExtractor The extractor of the nested object.

      * @param propertyAccessor The delegated property accessor.

      * @since 2.2.0

      */

     public NestedObjectDelegatePropertyAccessor(

             NestedObjectExtractor<T> nestedObjectExtractor,

             PropertyAccessor propertyAccessor) {

         this.nestedObjectExtractor = nestedObjectExtractor;

         this.propertyAccessor = propertyAccessor;

     }

     /** {@inheritDoc} */

     @SuppressWarnings("unchecked")

     public Object getProperty(@SuppressWarnings("rawtypes") Map context, Object target, Object name)

             throws OgnlException {

         return propertyAccessor.getProperty(context, nestedObjectExtractor

                 .getNestedObject((T) target), name);

     }

     /** {@inheritDoc} */

     @SuppressWarnings("unchecked")

     public void setProperty(@SuppressWarnings("rawtypes") Map context, Object target, Object name,

             Object value) throws OgnlException {

         propertyAccessor.setProperty(context, nestedObjectExtractor

                 .getNestedObject((T) target), name, value);

     }

     /** {@inheritDoc} */

     @SuppressWarnings("unchecked")

     public String getSourceAccessor(OgnlContext context, Object target,

             Object index) {

         return propertyAccessor.getSourceAccessor(context,

                 nestedObjectExtractor.getNestedObject((T) target), index);

     }

     /** {@inheritDoc} */

     @SuppressWarnings("unchecked")

     public String getSourceSetter(OgnlContext context, Object target,

             Object index) {

         return propertyAccessor.getSourceSetter(context, nestedObjectExtractor

                 .getNestedObject((T) target), index);

     }

 }