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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.internal.webapp;
20  
21  import org.eclipse.jetty.osgi.boot.utils.BundleFileLocatorHelper;
22  import org.eclipse.jetty.util.log.Log;
23  import org.eclipse.jetty.util.log.Logger;
24  
25  /**
26   * BundleFileLocatorHelperFactory
27   *
28   * Obtain a helper for locating files based on the bundle.
29   */
30  public class BundleFileLocatorHelperFactory
31  { 
32      private static final Logger LOG = Log.getLogger(BundleFileLocatorHelperFactory.class);
33      
34      private static BundleFileLocatorHelperFactory _instance = new BundleFileLocatorHelperFactory();
35      
36      private BundleFileLocatorHelperFactory() {}
37      
38      public static BundleFileLocatorHelperFactory getFactory()
39      {
40          return _instance;
41      }
42      
43      public BundleFileLocatorHelper getHelper()
44      {
45          BundleFileLocatorHelper helper = BundleFileLocatorHelper.DEFAULT;
46          try
47          {
48              //see if a fragment has supplied an alternative
49              helper = (BundleFileLocatorHelper) Class.forName(BundleFileLocatorHelper.CLASS_NAME).newInstance();
50          }
51          catch (Throwable t)
52          {
53              LOG.ignore(t);
54          }
55          return helper;
56      }
57  
58  }