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

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