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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.jetspeed.profiler.rules.impl;
18  
19  import org.apache.jetspeed.profiler.rules.RuleCriterion;
20  import org.apache.jetspeed.profiler.rules.RuleCriterionResolver;
21  import org.apache.jetspeed.request.RequestContext;
22  
23  /***
24   * SessionResolver
25   *
26   * @author <a href="mailto:taylor@apache.org">David Sean Taylor</a>
27   * @version $Id: $
28   */
29  public class SessionResolver extends StandardResolver implements RuleCriterionResolver
30  {
31      /* (non-Javadoc)
32       * @see org.apache.jetspeed.profiler.rules.RuleCriterionResolver#resolve(org.apache.jetspeed.request.RequestContext, org.apache.jetspeed.profiler.rules.RuleCriterion)
33       */
34      public String resolve(RequestContext context, RuleCriterion criterion)
35      {
36          String value = (String)context.getSessionAttribute(criterion.getName());
37          if (value == null)
38          {
39              value = criterion.getValue();
40          }
41          return value;            
42      }
43  
44  }