server/plugins/org.argeo.jcr.ui.explorer/src/main/java/org/argeo/jcr/ui/explorer/JcrExplorerPlugin.java

   1 /*
   2  * Copyright (C) 2007-2012 Argeo GmbH
   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.argeo.jcr.ui.explorer;
  17
  18 import java.util.ResourceBundle;
  19
  20 import org.apache.commons.logging.Log;
  21 import org.apache.commons.logging.LogFactory;
  22 import org.eclipse.jface.resource.ImageDescriptor;
  23 import org.eclipse.ui.plugin.AbstractUIPlugin;
  24 import org.osgi.framework.BundleContext;
  25
  26 /**
  27  * The activator class controls the plug-in life cycle
  28  */
  29 public class JcrExplorerPlugin extends AbstractUIPlugin {
  30         private final static Log log = LogFactory.getLog(JcrExplorerPlugin.class);
  31         private ResourceBundle messages;
  32
  33         // The plug-in ID
  34         public static final String ID = "org.argeo.jcr.ui.explorer"; //$NON-NLS-1$
  35
  36         // The shared instance
  37         private static JcrExplorerPlugin plugin;
  38
  39         /**
  40          * The constructor
  41          */
  42         public JcrExplorerPlugin() {
  43         }
  44
  45         /*
  46          * (non-Javadoc)
  47          *
  48          * @see
  49          * org.eclipse.ui.plugin.AbstractUIPlugin#start(org.osgi.framework.BundleContext
  50          * )
  51          */
  52         public void start(BundleContext context) throws Exception {
  53                 super.start(context);
  54                 plugin = this;
  55                 messages = ResourceBundle
  56                                 .getBundle("org.argeo.jcr.ui.explorer.messages");
  57
  58         }
  59
  60         /*
  61          * (non-Javadoc)
  62          *
  63          * @see
  64          * org.eclipse.ui.plugin.AbstractUIPlugin#stop(org.osgi.framework.BundleContext
  65          * )
  66          */
  67         public void stop(BundleContext context) throws Exception {
  68                 plugin = null;
  69                 super.stop(context);
  70         }
  71
  72         /**
  73          * Returns the shared instance
  74          *
  75          * @return the shared instance
  76          */
  77         public static JcrExplorerPlugin getDefault() {
  78                 return plugin;
  79         }
  80
  81         public static ImageDescriptor getImageDescriptor(String path) {
  82                 return imageDescriptorFromPlugin(ID, path);
  83         }
  84
  85         /** Returns the internationalized label for the given key */
  86         public static String getMessage(String key) {
  87                 try {
  88                         return getDefault().messages.getString(key);
  89                 } catch (NullPointerException npe) {
  90                         log.warn(key + " not found.");
  91                         return key;
  92                 }
  93         }
  94
  95         /**
  96          * Gives access to the internationalization message bundle. Returns null in
  97          * case the ClientUiPlugin is not started (for JUnit tests, by instance)
  98          */
  99         public static ResourceBundle getMessagesBundle() {
 100                 if (getDefault() != null)
 101                         // To avoid NPE
 102                         return getDefault().messages;
 103                 else
 104                         return null;
 105         }
 106
 107 }