bundles/org.simantics.charts/src/org/simantics/charts/ui/ChartItemDropActionFactory.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2011 Association for Decentralized Information Management in\r
   3  * 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.charts.ui;\r
  13 \r
  14 import java.util.List;\r
  15 \r
  16 import org.simantics.Simantics;\r
  17 import org.simantics.charts.ontology.ChartResource;\r
  18 import org.simantics.databoard.util.ObjectUtils;\r
  19 import org.simantics.db.ReadGraph;\r
  20 import org.simantics.db.Resource;\r
  21 import org.simantics.db.WriteGraph;\r
  22 import org.simantics.db.common.request.WriteRequest;\r
  23 import org.simantics.db.exception.DatabaseException;\r
  24 import org.simantics.db.layer0.SelectionHints;\r
  25 import org.simantics.db.layer0.adapter.DropActionFactory;\r
  26 import org.simantics.db.layer0.request.PossibleModel;\r
  27 import org.simantics.modeling.ModelingResources;\r
  28 import org.simantics.utils.datastructures.Callback;\r
  29 import org.simantics.utils.ui.ErrorLogger;\r
  30 import org.simantics.utils.ui.ISelectionUtils;\r
  31 \r
  32 /**\r
  33  * @author Tuukka Lehtonen\r
  34  */\r
  35 public class ChartItemDropActionFactory implements DropActionFactory {\r
  36 \r
  37     @Override\r
  38     public Runnable create(ReadGraph g, Object target, Object source, int operation) throws DatabaseException {\r
  39         //System.out.println("DROP: " + source + " -> " + target);\r
  40 \r
  41         final Resource chartItem = ISelectionUtils.getSinglePossibleKey(target, SelectionHints.KEY_MAIN, Resource.class);\r
  42         if (chartItem == null)\r
  43             return null;\r
  44         Resource targetModel = g.syncRequest(new PossibleModel(chartItem));\r
  45 \r
  46         List<Resource> srcs = ISelectionUtils.getPossibleKeys(source, SelectionHints.KEY_MAIN, Resource.class);\r
  47         ModelingResources MOD = ModelingResources.getInstance(g);\r
  48 \r
  49         Resource subscriptionItem = null;\r
  50 \r
  51         for (Resource res : srcs) {\r
  52                 if (g.isInstanceOf(res, MOD.Subscription_Item)) {\r
  53                         // Too much stuff dropped in one go.\r
  54                         if (subscriptionItem != null)\r
  55                                 return null;\r
  56 \r
  57                         Resource model = g.syncRequest(new PossibleModel(res));\r
  58                         if (ObjectUtils.objectEquals(targetModel, model)) {\r
  59                                 subscriptionItem = res;\r
  60                         }\r
  61             }\r
  62         }\r
  63         if (subscriptionItem != null)\r
  64                 return setSubscriptionItem(chartItem, subscriptionItem);\r
  65 \r
  66         return null;\r
  67     }\r
  68 \r
  69     private Runnable setSubscriptionItem(final Resource chartItem, final Resource subscriptionItem) {\r
  70         return new Runnable() {\r
  71             @Override\r
  72             public void run() {\r
  73                 Simantics.getSession().asyncRequest(new WriteRequest() {\r
  74                     @Override\r
  75                     public void perform(WriteGraph graph) throws DatabaseException {\r
  76                         ChartResource CHART = ChartResource.getInstance(graph);\r
  77                         graph.deny(chartItem, CHART.Chart_Item_HasSubscriptionItem);\r
  78                         graph.claim(chartItem, CHART.Chart_Item_HasSubscriptionItem, subscriptionItem);\r
  79                     }\r
  80                 }, new Callback<DatabaseException>() {\r
  81                     @Override\r
  82                     public void run(DatabaseException e) {\r
  83                         if (e != null)\r
  84                             ErrorLogger.defaultLogError(e);\r
  85                     }\r
  86                 });\r
  87             }\r
  88         };\r
  89     }\r
  90 \r
  91 }\r