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ScopePropertyAccessor xref
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1   /*
2    * $Id: ScopePropertyAccessor.java 1049696 2010-12-15 20:30:10Z apetrelli $
3    *
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   * http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing,
15   * software distributed under the License is distributed on an
16   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17   * KIND, either express or implied.  See the License for the
18   * specific language governing permissions and limitations
19   * under the License.
20   */
21  package org.apache.tiles.ognl;
22  
23  import java.util.Map;
24  
25  import ognl.OgnlContext;
26  import ognl.PropertyAccessor;
27  
28  import org.apache.tiles.request.Request;
29  
30  /**
31   * Accesses a scope.
32   *
33   * @version $Rev: 1049696 $ $Date: 2010-12-16 07:30:10 +1100 (Thu, 16 Dec 2010) $
34   */
35  public class ScopePropertyAccessor implements PropertyAccessor {
36  
37      /**
38       * The length of the scope suffix: "Scope".
39       */
40      static final int SCOPE_SUFFIX_LENGTH = 5;
41  
42      @Override
43      public Object getProperty(@SuppressWarnings("rawtypes") Map context, Object target, Object name) {
44          Request request = (Request) target;
45          String scope = (String) name;
46          if (scope.endsWith("Scope")) {
47              String scopeName = scope.substring(0, scope.length() - SCOPE_SUFFIX_LENGTH);
48              return request.getContext(scopeName);
49          }
50          return null;
51      }
52  
53      @Override
54      public String getSourceAccessor(OgnlContext context, Object target,
55              Object index) {
56          String scope = (String) index;
57          if (scope.endsWith("Scope")) {
58              String scopeName = scope.substring(0, scope.length() - SCOPE_SUFFIX_LENGTH);
59              return ".getContext(\"" + scopeName + "\")";
60          }
61          return null;
62      }
63  
64      @Override
65      public String getSourceSetter(OgnlContext context, Object target,
66              Object index) {
67          return null;
68      }
69  
70      @Override
71      public void setProperty(@SuppressWarnings("rawtypes") Map context, Object target, Object name,
72              Object value) {
73          // Does nothing.
74      }
75  
76  }