CachedManifest


1   /*******************************************************************************
2    * Copyright (c) 2003, 2004 IBM Corporation and others.
3    * All rights reserved. This program and the accompanying materials 
4    * are made available under the terms of the Common Public License v1.0
5    * which accompanies this distribution, and is available at
6    * http://www.eclipse.org/legal/cpl-v10.html
7    * 
8    * Contributors:
9    *     IBM Corporation - initial API and implementation
10   *******************************************************************************/
11  package org.eclipse.core.runtime.adaptor;
12  
13  import java.util.Dictionary  ;
14  import java.util.Enumeration  ;
15  import org.eclipse.osgi.framework.adaptor.FrameworkAdaptor;
16  import org.eclipse.osgi.framework.log.FrameworkLogEntry;
17  import org.eclipse.osgi.service.resolver.Version;
18  import org.osgi.framework.BundleException;
19  import org.osgi.framework.Constants;
20  
21  /**
22   * Internal class.
23   */
24  public class CachedManifest extends Dictionary   {
25  
26      Dictionary   manifest = null;
27      EclipseBundleData bundledata;
28  
29      public CachedManifest(EclipseBundleData bundledata) {
30          this.bundledata = bundledata;
31      }
32  
33      private Dictionary   getManifest() {
34          if (manifest == null)
35              try {
36                  manifest = bundledata.loadManifest();
37              } catch (BundleException e) {
38                  final String   message = EclipseAdaptorMsg.formatter.getString("ECLIPSE_CACHEDMANIFEST_UNEXPECTED_EXCEPTION", bundledata.getLocation()); //$NON-NLS-1$
39                  FrameworkLogEntry entry = new FrameworkLogEntry(FrameworkAdaptor.FRAMEWORK_SYMBOLICNAME, message, 0, e, null);
40                  EclipseAdaptor.getDefault().getFrameworkLog().log(entry);
41                  return null;
42              }
43          return manifest;
44      }
45  
46      public int size() {
47          //TODO: getManifest may return null
48          return getManifest().size();
49      }
50  
51      public boolean isEmpty() {
52          return size() == 0;
53      }
54  
55      public Enumeration   elements() {
56          //TODO: getManifest may return null     
57          return getManifest().elements();
58      }
59  
60      public Enumeration   keys() {
61          //TODO: getManifest may return null     
62          return getManifest().keys();
63      }
64  
65      public Object   get(Object   key) {
66          String   keyString = (String  ) key;
67          if (Constants.BUNDLE_VERSION.equalsIgnoreCase(keyString)) {
68              Version result = bundledata.getVersion();
69              return result == null ? null : result.toString();
70          }
71          if (EclipseAdaptor.PLUGIN_CLASS.equalsIgnoreCase(keyString))
72              return bundledata.getPluginClass();
73          if (Constants.BUNDLE_SYMBOLICNAME.equalsIgnoreCase(keyString))
74              return bundledata.getSymbolicName();
75          Dictionary   result = getManifest();
76          return result == null ? null : result.get(key);
77      }
78  
79      public Object   remove(Object   key) {
80          //TODO: getManifest may return null     
81          return getManifest().remove(key);
82      }
83  
84      public Object   put(Object   key, Object   value) {
85          //TODO: getManifest may return null     
86          return getManifest().put(key, value);
87      }
88  
89  }
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