ServiceHelper xref

This project has retired. For details please refer to its Attic page.
ServiceHelper xref

1   /*
2    * Copyright 2000-2004 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.apache.jetspeed.services;
17  
18  import org.apache.jetspeed.services.logging.JetspeedLogFactoryService;
19  import org.apache.jetspeed.services.logging.JetspeedLogger;
20  import org.apache.turbine.services.InitializationException;
21  import org.apache.turbine.services.Service;
22  
23  /***
24   * ServiceHelper
25   *
26   * @author <a href="mailto:taylor@apache.org">David Sean Taylor</a>
27   * @version $Id: ServiceHelper.java,v 1.2 2004/02/23 04:00:57 jford Exp $
28   */
29  public class ServiceHelper
30  {
31      private static final JetspeedLogger log = JetspeedLogFactoryService.getLogger(ServiceHelper.class.getName());
32      
33      /***
34       * Load an implementation class from the configuration.
35       * 
36       * @param configurationName
37       * @return
38       * @throws CPSInitializationException
39       */
40      static public Class loadModelClass(Service service, String configurationName)
41      throws InitializationException
42      {
43          String className = service.getConfiguration().getString(configurationName, null);
44          if (null == className)
45          {
46              throw new InitializationException(configurationName + " implementation configuration not found.");
47          }
48          try
49          {
50              return Class.forName(className);
51              
52          }
53          catch (ClassNotFoundException e)
54          {
55              throw new InitializationException("Could not preload " + className + " implementation class.", e);
56          }            
57      }
58  
59      /***
60       * Creates objects given the class. 
61       * Throws exceptions if the class is not found in the default class path, 
62       * or the class is not an instance of CmsObject.
63       * 
64       * @param classe the class of object
65       * @return the newly created object
66       * @throws ContentManagementException
67       */    
68      public static Object createObject(Class classe)
69      {
70          Object object = null;
71          try
72          {
73              object = classe.newInstance();
74          }
75          catch (Exception e)
76          {
77              log.error("Factory failed to create object: " + classe.getName(), e);            
78          }
79          
80          return object;        
81      }
82      
83  }