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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 javax.security.auth.Subject;
20  
21  import org.apache.commons.logging.Log;
22  import org.apache.commons.logging.LogFactory;
23  import org.apache.jetspeed.profiler.rules.RuleCriterion;
24  import org.apache.jetspeed.profiler.rules.RuleCriterionResolver;
25  import org.apache.jetspeed.request.RequestContext;
26  import org.apache.jetspeed.security.RolePrincipal;
27  
28  /***
29   * Standard Jetspeed-1 Role resolver (not role-based fallback).
30   * It first looks at the value in the criterion record.
31   * If it is null, it then falls back to a request parameter.
32   * If it is null it gives up and returns null allowing subclasses
33   * to continue processing.
34   *
35   * @author <a href="mailto:taylor@apache.org">David Sean Taylor</a>
36   * @version $Id: RoleCriterionResolver.java 516448 2007-03-09 16:25:47Z ate $
37   */
38  public class RoleCriterionResolver
39      extends StandardResolver
40      implements RuleCriterionResolver
41  {
42      protected final static Log log = LogFactory.getLog(UserCriterionResolver.class);
43      
44      /* (non-Javadoc)
45       * @see org.apache.jetspeed.profiler.rules.RuleCriterionResolver#resolve(org.apache.jetspeed.request.RequestContext, org.apache.jetspeed.profiler.rules.RuleCriterion)
46       */    
47      public String resolve(RequestContext context, RuleCriterion criterion)
48      {
49          String value = super.resolve(context, criterion);
50          if (value != null)
51          {
52              return value;
53          }
54              
55          Subject subject = context.getSubject();
56          if (subject == null)
57          {
58              String msg = "Invalid (null) Subject in request pipeline";
59              log.error(msg);
60              return null;
61          }
62              
63          return resolvePrincipals(context, criterion, subject, RolePrincipal.class);
64       }
65      
66      /* (non-Javadoc)
67       * @see org.apache.jetspeed.profiler.rules.RuleCriterionResolver#isControl()
68       */
69      public boolean isControl(RuleCriterion criterion)
70      {
71          return true;
72      }
73      
74      
75  }