bundles/org.simantics.graphfile/src/org/simantics/graphfile/adapters/SystemResourcePasteHandler.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2013 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.graphfile.adapters;\r
  13 \r
  14 import java.util.ArrayList;\r
  15 import java.util.Collection;\r
  16 import java.util.HashSet;\r
  17 import java.util.Set;\r
  18 \r
  19 import org.simantics.Simantics;\r
  20 import org.simantics.db.Resource;\r
  21 import org.simantics.db.WriteGraph;\r
  22 import org.simantics.db.exception.DatabaseException;\r
  23 import org.simantics.db.layer0.adapter.PasteHandlerAdapter;\r
  24 import org.simantics.db.layer0.util.ClipboardUtils;\r
  25 import org.simantics.db.layer0.util.PasteEventHandler;\r
  26 import org.simantics.db.layer0.util.RemoverUtil;\r
  27 import org.simantics.db.layer0.util.SimanticsClipboard;\r
  28 import org.simantics.db.layer0.util.SimanticsClipboard.Representation;\r
  29 import org.simantics.db.layer0.util.SimanticsKeys;\r
  30 import org.simantics.graph.db.IImportAdvisor;\r
  31 import org.simantics.graph.db.TransferableGraphException;\r
  32 import org.simantics.graph.db.TransferableGraphs;\r
  33 import org.simantics.graph.representation.TransferableGraph1;\r
  34 \r
  35 public class SystemResourcePasteHandler  extends PasteHandlerAdapter  \r
  36 \r
  37 {\r
  38         private Resource resource;\r
  39 \r
  40     public SystemResourcePasteHandler(Resource resource) {\r
  41         this.resource = resource;\r
  42     }\r
  43 \r
  44     public static void defaultExecute(TransferableGraph1 tg, Resource resource, IImportAdvisor advisor) throws DatabaseException, TransferableGraphException {\r
  45         TransferableGraphs.importGraph1(Simantics.getSession(), tg, advisor);\r
  46     }\r
  47 \r
  48     public static void defaultExecute(WriteGraph graph, TransferableGraph1 tg, Resource resource, IImportAdvisor advisor) throws DatabaseException {\r
  49         TransferableGraphs.importGraph1(graph, tg, advisor);\r
  50     }\r
  51 \r
  52     public void execute(WriteGraph graph, TransferableGraph1 tg, Resource resource, IImportAdvisor advisor) throws DatabaseException {\r
  53         defaultExecute(graph, tg, resource, advisor);\r
  54     }\r
  55 \r
  56     /**\r
  57      * Override this in your inherited class if post processing is done.\r
  58      */\r
  59     public void onPasteBegin(WriteGraph graph) throws DatabaseException {\r
  60     }\r
  61 \r
  62     /**\r
  63      * Override this in your inherited class if post processing is done\r
  64      * advisor.getTarget() returns an object under which data is copied\r
  65      * advisor.getRoot() returns the object which have been pasted.\r
  66      * @param representations TODO\r
  67      */\r
  68     public void onPaste(WriteGraph graph, SystemResourcePasteImportAdvisor advisor, Set<Representation> representations) throws DatabaseException {\r
  69         advisor.attachRoot(graph);\r
  70     }\r
  71 \r
  72     /**\r
  73      * Override this in your inherited class if post processing is done.\r
  74      */\r
  75     public void onPasteEnd(WriteGraph graph) throws DatabaseException{\r
  76     }\r
  77 \r
  78     public Collection<Resource> pasteObject(WriteGraph graph, Set<Representation> object) throws DatabaseException {\r
  79         Collection<Resource> result = new ArrayList<Resource>();\r
  80         TransferableGraph1 tg = ClipboardUtils.accept(graph, object, SimanticsKeys.KEY_TRANSFERABLE_GRAPH);\r
  81         if (tg != null) {\r
  82            SystemResourcePasteImportAdvisor advisor = new SystemResourcePasteImportAdvisor(graph, resource); \r
  83             execute(graph, tg, resource, advisor);\r
  84             result.add(advisor.getRoot());\r
  85             try {\r
  86                 onPaste(graph, advisor, object);\r
  87             } catch (Throwable e) {\r
  88             }\r
  89         }\r
  90         return result;\r
  91     }\r
  92 \r
  93     @Override\r
  94     public Collection<Resource> pasteFromClipboard(WriteGraph graph, SimanticsClipboard clipboard, PasteEventHandler handler) throws DatabaseException {\r
  95         \r
  96         Collection<Resource> result = new ArrayList<Resource>();\r
  97         \r
  98         try {\r
  99             onPasteBegin(graph);\r
 100         } catch (Throwable e) {\r
 101         }\r
 102 \r
 103         final Set<Resource> cuts = new HashSet<Resource>();\r
 104         for(Set<Representation> object : clipboard.getContents()) {\r
 105             result.addAll(pasteObject(graph, object));\r
 106             Collection<Resource> cut = ClipboardUtils.accept(object, SimanticsKeys.KEY_CUT_RESOURCES);\r
 107             if (cut != null)\r
 108                 cuts.addAll(cut);\r
 109         }\r
 110 \r
 111         try {\r
 112             onPasteEnd(graph);\r
 113         } catch (Throwable e) {\r
 114         }\r
 115 \r
 116         if(!cuts.isEmpty()) {\r
 117                 for (Resource cut : cuts)\r
 118                         RemoverUtil.remove(graph, cut);\r
 119         }\r
 120         \r
 121         return result;\r
 122         \r
 123     }\r
 124 \r
 125     @SuppressWarnings("rawtypes")\r
 126     @Override\r
 127     public Object getAdapter(Class adapter) {\r
 128         if(Resource.class == adapter) return resource;\r
 129         return null;\r
 130     }\r
 131 \r
 132         \r
 133 \r
 134 }\r