bundles/org.simantics.event/src/org/simantics/event/view/handler/ClaimAction.java

   1 package org.simantics.event.view.handler;\r
   2 \r
   3 import org.eclipse.jface.action.Action;\r
   4 import org.eclipse.jface.resource.ImageDescriptor;\r
   5 import org.simantics.Simantics;\r
   6 import org.simantics.db.Resource;\r
   7 import org.simantics.db.Session;\r
   8 import org.simantics.db.VirtualGraph;\r
   9 import org.simantics.db.WriteGraph;\r
  10 import org.simantics.db.common.request.WriteRequest;\r
  11 import org.simantics.db.exception.DatabaseException;\r
  12 import org.simantics.db.service.VirtualGraphSupport;\r
  13 import org.simantics.layer0.Layer0;\r
  14 import org.simantics.utils.datastructures.Callback;\r
  15 import org.simantics.utils.ui.ErrorLogger;\r
  16 \r
  17 /**\r
  18  * @author Tuukka Lehtonen\r
  19  */\r
  20 public class ClaimAction extends Action {\r
  21 \r
  22     protected final String   virtualGraphId;\r
  23     protected final Resource subject;\r
  24     protected final String   relationURI;\r
  25     protected final Resource object;\r
  26 \r
  27     /**\r
  28      * @param label\r
  29      * @param image\r
  30      * @param virtualGraphId\r
  31      * @param tagURI\r
  32      * @param tag <code>true</code> to add tag, <code>false</code> to remove tag\r
  33      * @param input\r
  34      */\r
  35     public ClaimAction(String label, ImageDescriptor image, String virtualGraphId, Resource subject, String relationURI, Resource object) {\r
  36         super(label, image);\r
  37 \r
  38         this.virtualGraphId = virtualGraphId;\r
  39         this.subject = subject;\r
  40         this.relationURI = relationURI;\r
  41         this.object = object;\r
  42     }\r
  43 \r
  44     @Override\r
  45     public void run() {\r
  46         Session session = Simantics.peekSession();\r
  47         if (session != null) {\r
  48             VirtualGraph vg = virtualGraphId == null ? null :\r
  49                 session.getService(VirtualGraphSupport.class).getWorkspacePersistent(virtualGraphId);\r
  50             session.asyncRequest(new WriteRequest(vg) {\r
  51                 @Override\r
  52                 public void perform(WriteGraph graph) throws DatabaseException {\r
  53                     claim(graph);\r
  54                 }\r
  55             }, new Callback<DatabaseException>() {\r
  56                 @Override\r
  57                 public void run(DatabaseException parameter) {\r
  58                     if (parameter != null)\r
  59                         ErrorLogger.defaultLogError(parameter);\r
  60                 }\r
  61             });\r
  62         }\r
  63     }\r
  64 \r
  65     public void claim(WriteGraph graph) throws DatabaseException {\r
  66         Layer0 L0 = Layer0.getInstance(graph);\r
  67         Resource relation = graph.getResource(relationURI);\r
  68         boolean functional = graph.isInstanceOf(relation, L0.FunctionalRelation);\r
  69         if (functional)\r
  70             graph.deny(subject, relation);\r
  71         graph.claim(subject, graph.getResource(relationURI), object);\r
  72     }\r
  73 \r
  74 }\r