bundles/org.simantics.browsing.ui.swt/src/org/simantics/browsing/ui/swt/BundleIcon.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2012 Association for Decentralized Information Management\r
   3  * in Industry THTH ry.\r
   4  * All rights reserved. This program and the accompanying materials\r
   5  * are made available under the terms of the Eclipse Public License v1.0\r
   6  * which accompanies this distribution, and is available at\r
   7  * http://www.eclipse.org/legal/epl-v10.html\r
   8  *\r
   9  * Contributors:\r
  10  *     VTT Technical Research Centre of Finland - initial API and implementation\r
  11  *******************************************************************************/\r
  12 package org.simantics.browsing.ui.swt;\r
  13 \r
  14 import java.net.URL;\r
  15 \r
  16 import org.eclipse.core.runtime.Platform;\r
  17 import org.eclipse.jface.resource.ImageDescriptor;\r
  18 import org.osgi.framework.Bundle;\r
  19 import org.simantics.Simantics;\r
  20 import org.simantics.browsing.ui.swt.stubs.BrowsingResource;\r
  21 import org.simantics.db.ReadGraph;\r
  22 import org.simantics.db.Resource;\r
  23 import org.simantics.db.exception.DatabaseException;\r
  24 import org.simantics.db.request.Read;\r
  25 import org.simantics.utils.datastructures.Pair;\r
  26 \r
  27 /**\r
  28  * @author Antti Villberg\r
  29  */\r
  30 public class BundleIcon implements ModelledIcon {\r
  31 \r
  32     private final Resource       configuration;\r
  33     private Pair<String, String> location;\r
  34 \r
  35     public BundleIcon(ReadGraph graph, Resource configuration) throws DatabaseException {\r
  36         this.configuration = configuration;\r
  37         this.location = graph.syncRequest(new Location(configuration));\r
  38     }\r
  39 \r
  40     @Override\r
  41     public ImageDescriptor create() throws DatabaseException {\r
  42         Pair<String, String> bundleAndPath = Simantics.getSession().syncRequest(new Location(configuration));\r
  43         if (bundleAndPath == null)\r
  44             return null;\r
  45 \r
  46         Bundle bundle = Platform.getBundle(bundleAndPath.first);\r
  47         if (bundle == null)\r
  48             return null;\r
  49         URL url = bundle.getEntry(bundleAndPath.second);\r
  50         return ImageDescriptor.createFromURL(url);\r
  51     }\r
  52 \r
  53     @Override\r
  54     public String toString() {\r
  55         return super.toString() + "[" + location + "]";\r
  56     }\r
  57 \r
  58     static class Location implements Read<Pair<String, String>> {\r
  59         Resource configuration;\r
  60         public Location(Resource configuration) {\r
  61             this.configuration = configuration;\r
  62         }\r
  63         @Override\r
  64         public Pair<String, String> perform(ReadGraph graph) throws DatabaseException {\r
  65             BrowsingResource BRO = BrowsingResource.getInstance(graph);\r
  66             String bundle = graph.getPossibleRelatedValue(configuration, BRO.BundleIcon_Bundle);\r
  67             if (bundle == null)\r
  68                 return null;\r
  69             String path = graph.getPossibleRelatedValue(configuration, BRO.BundleIcon_Path);\r
  70             if (path == null)\r
  71                 return null;\r
  72             return Pair.make(bundle, path);\r
  73         }\r
  74     }\r
  75 \r
  76 }\r