/*

  * $Id: ScopePropertyAccessor.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.PropertyAccessor;

 import org.apache.tiles.request.Request;

 /**

  * Accesses a scope.

  *

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

  */

 public class ScopePropertyAccessor implements PropertyAccessor {

     /**

      * The length of the scope suffix: "Scope".

      */

     static final int SCOPE_SUFFIX_LENGTH = 5;

     @Override

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

         Request request = (Request) target;

         String scope = (String) name;

         if (scope.endsWith("Scope")) {

             String scopeName = scope.substring(0, scope.length() - SCOPE_SUFFIX_LENGTH);

             return request.getContext(scopeName);

         }

         return null;

     }

     @Override

     public String getSourceAccessor(OgnlContext context, Object target,

             Object index) {

         String scope = (String) index;

         if (scope.endsWith("Scope")) {

             String scopeName = scope.substring(0, scope.length() - SCOPE_SUFFIX_LENGTH);

             return ".getContext(\"" + scopeName + "\")";

         }

         return null;

     }

     @Override

     public String getSourceSetter(OgnlContext context, Object target,

             Object index) {

         return null;

     }

     @Override

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

             Object value) {

         // Does nothing.

     }

 }