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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    * 
9    *      http://www.apache.org/licenses/LICENSE-2.0
10   * 
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  package org.apache.mina.integration.ognl;
18  
19  import java.util.Map;
20  import java.util.TreeMap;
21  
22  import ognl.OgnlContext;
23  import ognl.OgnlException;
24  import ognl.OgnlRuntime;
25  import ognl.PropertyAccessor;
26  
27  import org.apache.mina.core.session.IoSession;
28  
29  /**
30   * An OGNL {@link PropertyAccessor} for {@link IoSession}.
31   * 
32   * @author <a href="http://mina.apache.org">Apache MINA Project</a>
33   */
34  public class IoSessionPropertyAccessor extends AbstractPropertyAccessor {
35  
36      @Override
37      protected Object getProperty0(OgnlContext context, Object target,
38              String name) throws OgnlException {
39          if (target instanceof IoSession && "attributes".equals(name)) {
40              Map<String, Object> attributes = new TreeMap<String, Object>();
41              IoSession s = (IoSession) target;
42              for (Object key: s.getAttributeKeys()) {
43                  Object value = s.getAttribute(key);
44                  if (value == null) {
45                      continue;
46                  }
47                  attributes.put(String.valueOf(key), value);
48              }
49              return attributes;
50          }
51          
52          return OgnlRuntime.NotFound;
53      }
54  
55      @Override
56      protected boolean hasGetProperty0(OgnlContext context, Object target,
57              String name) throws OgnlException {
58          return target instanceof IoSession && "attributes".equals(name);
59      }
60  
61      @Override
62      protected boolean hasSetProperty0(OgnlContext context, Object target,
63              String name) throws OgnlException {
64          return false;
65      }
66  
67      @Override
68      protected Object setProperty0(OgnlContext context, Object target,
69              String name, Object value) throws OgnlException {
70          return OgnlRuntime.NotFound;
71      }
72  }