View Javadoc

1   /*
2    * Copyright 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  package org.portletbridge.portlet;
17  
18  
19  /***
20   * Default Id Generator. Uses the GUIDGenerator to generate
21   * url friendly id's.
22   * 
23   * @author jmccrindle
24   */
25  public class DefaultIdGenerator implements IdGenerator {
26  
27      private final GUIDGenerator generator;
28  
29      private static IdGenerator instance = new DefaultIdGenerator();
30  
31      /***
32       * Unfortunate, because I can't stand singletons
33       */
34      public synchronized static IdGenerator getInstance() {
35          return instance;
36      }
37      
38      /***
39       * Default Constructor
40       */
41      public DefaultIdGenerator() {
42          try {
43              this.generator = new GUIDGenerator();
44          } catch (GUIDException e) {
45              throw new RuntimeException(e);
46          }
47      }
48  
49      /***
50       * @return the next integer
51       */
52      public synchronized String nextId() {
53          return generator.getUUID();
54      }
55  
56  }