JetspeedRoleFactory xref

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1   /*
2    * Copyright 2000-2001,2004 The Apache Software Foundation.
3    * 
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    * 
8    *      http://www.apache.org/licenses/LICENSE-2.0
9    * 
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  
17  package org.apache.jetspeed.om.security;
18  
19  import org.apache.turbine.services.TurbineServices;
20  import org.apache.turbine.services.resources.ResourceService;
21  
22  import org.apache.jetspeed.services.security.RoleException;
23  import org.apache.jetspeed.services.security.JetspeedSecurityService;
24  
25  /***
26   * Factory class for creating Jetspeed Roles.
27   * The role class is configured in the JR.p
28   *
29   */
30  public class JetspeedRoleFactory
31  {
32      private static final String CONFIG_ROLE_CLASSNAME = "role.class";
33  
34      private static String roleClassName = null;
35      private static Class roleClass = null;
36      
37      /***
38       * Factory method to create JetspeedRole instances.  
39       *
40       *
41       * @throws UnknownEntityException when the role instance cant be created.
42       * @return Role a new created role.
43       */
44      public static Role getInstance()
45          throws RoleException
46      {
47          return getInstance(true);
48      }
49  
50      public static Role getInstance(boolean isNew)
51          throws RoleException
52      {
53          Role role = null;
54  
55          if (null == roleClassName)
56          {
57              try
58              {
59                  ResourceService serviceConf = ((TurbineServices)TurbineServices.getInstance())
60                                                           .getResources(JetspeedSecurityService.SERVICE_NAME);
61                  roleClassName = serviceConf.getString(CONFIG_ROLE_CLASSNAME);                                                             
62                  roleClass = Class.forName(roleClassName);
63              }
64              catch(Exception e)
65              {
66                  throw new RoleException(
67                      "RoleFactory: Failed to create a Class object for Role implementation: " + e.toString());
68              }
69          }
70  
71          try
72          {
73              role = (Role)roleClass.newInstance();
74              if (role instanceof BaseJetspeedRole)
75              {
76                  ((BaseJetspeedRole)role).setNew(isNew);
77              }            
78          }
79          catch(Exception e)
80          {
81              throw new RoleException("Failed instantiate an Role implementation object: " + e.toString());
82          }
83  
84          return role;
85      }
86      
87  
88  }
89  
90