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

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2010 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.charts.ui;
  13
  14 import java.util.ArrayList;
  15 import java.util.Collection;
  16 import java.util.Collections;
  17 import java.util.List;
  18 import java.util.Set;
  19
  20 import org.simantics.charts.query.AddChartItem;
  21 import org.simantics.charts.query.ChartItemDescriptor;
  22 import org.simantics.databoard.util.ObjectUtils;
  23 import org.simantics.db.Resource;
  24 import org.simantics.db.WriteGraph;
  25 import org.simantics.db.common.request.WriteResultRequest;
  26 import org.simantics.db.exception.DatabaseException;
  27 import org.simantics.db.layer0.adapter.PasteHandlerAdapter;
  28 import org.simantics.db.layer0.request.PossibleModel;
  29 import org.simantics.db.layer0.util.ClipboardUtils;
  30 import org.simantics.db.layer0.util.PasteEventHandler;
  31 import org.simantics.db.layer0.util.SimanticsClipboard;
  32 import org.simantics.db.layer0.util.SimanticsClipboard.Representation;
  33 import org.simantics.db.layer0.util.SimanticsKeys;
  34 import org.simantics.modeling.ModelingResources;
  35
  36 /**
  37  * Paste handler of Paste Resource
  38  *
  39  * @author Tuukka Lehtonen
  40  */
  41 public class ChartPasteHandler extends PasteHandlerAdapter {
  42
  43     private Resource chart;
  44
  45     public ChartPasteHandler(Resource chart) {
  46         this.chart = chart;
  47     }
  48
  49     @Override
  50     public Collection<Resource> pasteFromClipboard(WriteGraph graph, SimanticsClipboard clipboard, PasteEventHandler handler) throws DatabaseException {
  51         final List<Resource> resources = new ArrayList<Resource>();
  52         for (Set<Representation> object : clipboard.getContents()) {
  53             Collection<Resource> rs = ClipboardUtils.accept(object, SimanticsKeys.KEY_COPY_RESOURCES);
  54             if (rs != null)
  55                 resources.addAll(rs);
  56         }
  57
  58         if (resources.isEmpty())
  59             return Collections.emptyList();
  60
  61         return graph.syncRequest(new WriteResultRequest<Collection<Resource>>() {
  62             @Override
  63             public Collection<Resource> perform(WriteGraph graph) throws DatabaseException {
  64                 ModelingResources MOD = ModelingResources.getInstance(graph);
  65                 Resource expectedModel = graph.syncRequest( new PossibleModel(chart) );
  66                 List<ChartItemDescriptor> refs = new ArrayList<ChartItemDescriptor>();
  67                 for (Resource r : resources) {
  68                     if (graph.isInstanceOf(r, MOD.Subscription_Item)) {
  69                         Resource model = graph.syncRequest(new PossibleModel(r));
  70                         if (ObjectUtils.objectEquals(expectedModel, model))
  71                             refs.add( AddChartItem.createDescriptor(graph, r) );
  72                     }
  73                 }
  74                 if (!refs.isEmpty())
  75                     return AddChartItem.addAndMoveChartItems(chart, refs, Collections.<Resource>emptySet()).perform(graph);
  76                 else
  77                         return Collections.emptyList();
  78             }
  79         });
  80     }
  81
  82     @SuppressWarnings("rawtypes")
  83     @Override
  84     public Object getAdapter(Class adapter) {
  85         if (Resource.class == adapter)
  86             return chart;
  87         return null;
  88     }
  89
  90 }