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