bundles/org.simantics.modeling.ui/src/org/simantics/modeling/ui/property/ModelPropertyTester.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.modeling.ui.property;\r
  13 \r
  14 import java.util.Collection;\r
  15 \r
  16 import org.eclipse.core.expressions.PropertyTester;\r
  17 import org.simantics.DatabaseJob;\r
  18 import org.simantics.Simantics;\r
  19 import org.simantics.db.ReadGraph;\r
  20 import org.simantics.db.Resource;\r
  21 import org.simantics.db.Session;\r
  22 import org.simantics.db.common.request.UniqueRead;\r
  23 import org.simantics.db.common.utils.RequestUtil;\r
  24 import org.simantics.db.exception.DatabaseException;\r
  25 import org.simantics.db.layer0.request.ActiveModels;\r
  26 import org.simantics.scl.reflection.OntologyVersions;\r
  27 import org.simantics.ui.SimanticsUI;\r
  28 import org.simantics.utils.ui.ErrorLogger;\r
  29 \r
  30 /**\r
  31  * @author Tuukka Lehtonen\r
  32  */\r
  33 public class ModelPropertyTester extends PropertyTester {\r
  34 \r
  35     /**\r
  36      * Tests if the received object within the model browser tree node is an\r
  37      * instance of the class specified as the argument.\r
  38      */\r
  39     private static final String HAS_ACTIVE_MODELS_OF_TYPE = "hasActiveModelsOfType";\r
  40 \r
  41     @Override\r
  42     public boolean test(final Object receiver, final String property, final Object[] args, final Object expectedValue) {\r
  43         try {\r
  44             if (HAS_ACTIVE_MODELS_OF_TYPE.equals(property)) {\r
  45                 if (args.length == 0)\r
  46                     return false;\r
  47 \r
  48                 Session session = Simantics.peekSession();\r
  49                 final Resource project = Simantics.peekProjectResource();\r
  50                 if (session != null && project != null) {\r
  51                     if (DatabaseJob.inProgress())\r
  52                         return false;\r
  53 \r
  54                     return RequestUtil.trySyncRequest(\r
  55                             session,\r
  56                             SimanticsUI.UI_THREAD_REQUEST_START_TIMEOUT,\r
  57                             SimanticsUI.UI_THREAD_REQUEST_EXECUTION_TIMEOUT,\r
  58                             false,\r
  59                             new UniqueRead<Boolean>() {\r
  60                         @Override\r
  61                         public Boolean perform(ReadGraph graph)\r
  62                                 throws DatabaseException {\r
  63                             Resource type = graph.getPossibleResource( OntologyVersions.getInstance().currentVersion((String) args[0]) );\r
  64                             if (type == null)\r
  65                                 return false;\r
  66 \r
  67                             Collection<Resource> activeModels = graph.syncRequest(new ActiveModels(project));\r
  68                             for (Resource activeModel : activeModels)\r
  69                                 if (graph.isInstanceOf(activeModel, type))\r
  70                                     return true;\r
  71                             return false;\r
  72                         }\r
  73                     });\r
  74                 }\r
  75             }\r
  76         } catch (DatabaseException | InterruptedException e) {\r
  77             ErrorLogger.defaultLogError(e);\r
  78         }\r
  79         return false;\r
  80     }\r
  81 \r
  82 }\r