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1   //
2   //  ========================================================================
3   //  Copyright (c) 1995-2013 Mort Bay Consulting Pty. Ltd.
4   //  ------------------------------------------------------------------------
5   //  All rights reserved. This program and the accompanying materials
6   //  are made available under the terms of the Eclipse Public License v1.0
7   //  and Apache License v2.0 which accompanies this distribution.
8   //
9   //      The Eclipse Public License is available at
10  //      http://www.eclipse.org/legal/epl-v10.html
11  //
12  //      The Apache License v2.0 is available at
13  //      http://www.opensource.org/licenses/apache2.0.php
14  //
15  //  You may elect to redistribute this code under either of these licenses.
16  //  ========================================================================
17  //
18  
19  package org.eclipse.jetty.osgi.boot.utils;
20  
21  import org.eclipse.jetty.util.log.Log;
22  import org.eclipse.jetty.util.log.Logger;
23  
24  /**
25   * BundleClassLoaderHelperFactory
26   *
27   * Get a class loader helper adapted for the particular osgi environment.
28   */
29  public class BundleClassLoaderHelperFactory
30  {
31      private static final Logger LOG = Log.getLogger(BundleClassLoaderHelperFactory.class);
32      
33      private static BundleClassLoaderHelperFactory _instance = new BundleClassLoaderHelperFactory();
34      
35      public static BundleClassLoaderHelperFactory getFactory()
36      {
37          return _instance;
38      }
39      
40      private BundleClassLoaderHelperFactory()
41      {
42      }
43      
44      public BundleClassLoaderHelper getHelper()
45      {
46          //use the default
47          BundleClassLoaderHelper helper = BundleClassLoaderHelper.DEFAULT;
48          try
49          {
50              //if a fragment has not provided their own impl
51              helper = (BundleClassLoaderHelper) Class.forName(BundleClassLoaderHelper.CLASS_NAME).newInstance();
52          }
53          catch (Throwable t)
54          {
55              LOG.ignore(t);
56          }
57          
58          return helper;
59      }
60  
61  }