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

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