RoleManager


1   /**
2    * Copyright 2004-2005 jManage.org
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.jmanage.core.auth;
18  
19  import org.jdom.Document;
20  import org.jdom.JDOMException;
21  import org.jdom.Element;
22  import org.jdom.input.SAXBuilder;
23  import org.jmanage.core.util.Loggers;
24  
25  import java.io.File  ;
26  import java.util.List  ;
27  import java.util.ArrayList  ;
28  import java.util.Iterator  ;
29  import java.util.logging.Logger  ;
30  
31  /**
32   * Curently loading roles from configuration files.
33   *
34   * Date: Mar 20, 2005 12:58:25 PM
35   * @author Shashank Bellary 
36   */
37  public class RoleManager implements AuthConstants{
38      private static long lastModified = -1;
39      private static List   roles = null;
40      private static final Logger   logger = Loggers.getLogger(RoleManager.class);
41  
42      static{
43          init(new File  (ROLE_CONFIG_FILE_NAME));
44      }
45  
46      private RoleManager(){}
47  
48      /**
49       * Initializer
50       *
51       * @param roleConfigFile
52       */
53      private static void init(File   roleConfigFile) {
54          try{
55              lastModified = roleConfigFile.lastModified();
56              Document roleConfig = new SAXBuilder().build(roleConfigFile);
57              roles = loadUserRoles(roleConfig);
58          }catch(JDOMException jdEx){
59              logger.info("Error reading roles "+ROLE_CONFIG_FILE_NAME);
60              jdEx.printStackTrace();
61          }
62      }
63  
64      /**
65       * The only accessor method to the configured roles.
66       *
67       * @return
68       */
69      public static List   getAll(){
70          File   roleConfigFile = new File  (ROLE_CONFIG_FILE_NAME);
71          if(lastModified < roleConfigFile.lastModified()){
72              /*  Refresh the cache   */
73              init(roleConfigFile);
74          }
75          return roles;
76      }
77  
78      /**
79       * Read the configuration file and load all configured roles
80       *
81       * @param roleConfig
82       * @return
83       */
84      private static List   loadUserRoles(Document roleConfig){
85          List   userRoles = new ArrayList  ();
86          List   configuredRoles = roleConfig.getRootElement().getChildren();
87          Iterator   roleIterator = configuredRoles.iterator();
88          while(roleIterator.hasNext()){
89              Element role = (Element)roleIterator.next();
90              userRoles.add(new Role(role.getTextTrim()));
91          }
92          return userRoles;
93      }
94  }
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