bundles/org.simantics.event/src/org/simantics/event/view/contribution/EventTypeImageDescriptorRequest.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2013 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  *     Semantum Oy - initial API and implementation\r
  11  *******************************************************************************/\r
  12 package org.simantics.event.view.contribution;\r
  13 \r
  14 import org.eclipse.jface.resource.ImageDescriptor;\r
  15 import org.simantics.db.ReadGraph;\r
  16 import org.simantics.db.Resource;\r
  17 import org.simantics.db.common.request.ResourceRead;\r
  18 import org.simantics.db.exception.DatabaseException;\r
  19 import org.simantics.ui.icons.GraphImageDescriptor;\r
  20 import org.simantics.viewpoint.ontology.ViewpointResource;\r
  21 \r
  22 /**\r
  23  * @author Tuukka Lehtonen\r
  24  */\r
  25 public class EventTypeImageDescriptorRequest extends ResourceRead<ImageDescriptor> {\r
  26 \r
  27     public EventTypeImageDescriptorRequest(Resource eventType) {\r
  28         super(eventType);\r
  29     }\r
  30 \r
  31     @Override\r
  32     public ImageDescriptor perform(ReadGraph graph) throws DatabaseException {\r
  33         ViewpointResource VP = ViewpointResource.getInstance(graph);\r
  34         Resource image = graph.getPossibleObject(resource, VP.ConstantImageRule_HasImage);\r
  35         if (image == null)\r
  36             return null;\r
  37         return new GraphImageDescriptor(graph, image);\r
  38     }\r
  39 \r
  40 }