bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/adapter/impl/DefaultCopyHandler.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2010 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.db.layer0.adapter.impl;\r
  13 \r
  14 import java.util.ArrayList;\r
  15 import java.util.Collection;\r
  16 import java.util.Collections;\r
  17 import java.util.HashSet;\r
  18 import java.util.Map;\r
  19 \r
  20 import org.simantics.db.ReadGraph;\r
  21 import org.simantics.db.Resource;\r
  22 import org.simantics.db.common.request.ResourceRead;\r
  23 import org.simantics.db.common.utils.Logger;\r
  24 import org.simantics.db.exception.DatabaseException;\r
  25 import org.simantics.db.layer0.adapter.CopyHandler;\r
  26 import org.simantics.db.layer0.adapter.CopyHandler2;\r
  27 import org.simantics.db.layer0.util.ClipboardUtils;\r
  28 import org.simantics.db.layer0.util.ModelTransferableGraphSourceRequest;\r
  29 import org.simantics.db.layer0.util.SimanticsClipboard.Representation;\r
  30 import org.simantics.db.layer0.util.SimanticsClipboardBuilder;\r
  31 import org.simantics.db.layer0.util.TGRepresentation;\r
  32 import org.simantics.db.layer0.util.TGRepresentationUtils;\r
  33 import org.simantics.db.layer0.util.TGSourceRepresentation;\r
  34 import org.simantics.db.layer0.util.TransferableGraphConfiguration2;\r
  35 import org.simantics.graph.db.TransferableGraphSource;\r
  36 import org.simantics.graph.db.TransferableGraphs;\r
  37 import org.simantics.graph.representation.TransferableGraph1;\r
  38 import org.simantics.operation.Layer0X;\r
  39 \r
  40 public class DefaultCopyHandler implements CopyHandler, CopyHandler2 {\r
  41 \r
  42     protected Collection<Resource> resources;\r
  43 \r
  44     public DefaultCopyHandler(Resource resource) {\r
  45         this.resources = Collections.singletonList(resource);\r
  46     }\r
  47 \r
  48     public DefaultCopyHandler(Collection<Resource> resources) {\r
  49         this.resources = resources;\r
  50     }\r
  51 \r
  52     public Resource getResource() {\r
  53         if(resources.size() != 1) throw new IllegalStateException();\r
  54         return resources.iterator().next();\r
  55     }\r
  56 \r
  57     protected CopyHandler2 create(Collection<Resource> resources) {\r
  58         return new DefaultCopyHandler(resources);\r
  59     }\r
  60 \r
  61     protected boolean ignoreVirtualResources() {\r
  62         return true;\r
  63     }\r
  64 \r
  65     @Override\r
  66     public CopyHandler2 combine(CopyHandler2 other_) {\r
  67         if(other_ instanceof DefaultCopyHandler) {\r
  68             DefaultCopyHandler other = (DefaultCopyHandler)other_;\r
  69             ArrayList<Resource> allResources = new ArrayList<Resource>();\r
  70             allResources.addAll(resources);\r
  71             allResources.addAll(other.resources);\r
  72             return create(allResources);\r
  73         }\r
  74         return null;\r
  75     }\r
  76 \r
  77     protected TransferableGraphConfiguration2 createConfiguration(ReadGraph graph, boolean cut) throws DatabaseException {\r
  78                 if(cut) return null;\r
  79         return new TransferableGraphConfiguration2(graph, resources, ignoreVirtualResources(), false);\r
  80     }\r
  81 \r
  82     protected TransferableGraphSource computeSource(ReadGraph graph, TransferableGraphConfiguration2 conf) throws DatabaseException {\r
  83         return graph.syncRequest(new ModelTransferableGraphSourceRequest(conf));\r
  84     }\r
  85 \r
  86     protected TransferableGraph1 compute(ReadGraph graph, TransferableGraphConfiguration2 conf) throws DatabaseException {\r
  87         return TransferableGraphs.create(graph, computeSource(graph, conf));\r
  88     }\r
  89 \r
  90     protected Representation createTransferableGraph(ReadGraph graph, Collection<Resource> resources, boolean cut) throws DatabaseException {\r
  91         final TransferableGraphConfiguration2 conf = createConfiguration(graph, cut);\r
  92         if(conf == null) return null;\r
  93         return new TGRepresentation(resources.toArray(new Resource[resources.size()])) {\r
  94             @Override\r
  95             public TransferableGraph1 compute(ReadGraph graph, Map<String,Object> hints) throws DatabaseException {\r
  96                 conf.exclusionFunction = TGRepresentationUtils.computeExclusionFunction(graph, resources, hints);\r
  97                 return DefaultCopyHandler.this.compute(graph, conf);\r
  98             }\r
  99         };\r
 100     }\r
 101 \r
 102     protected Representation createTransferableGraphSource(ReadGraph graph, Collection<Resource> resources, boolean cut) throws DatabaseException {\r
 103         final TransferableGraphConfiguration2 conf = createConfiguration(graph, cut);\r
 104         if(conf == null) return null;\r
 105         return new TGSourceRepresentation(resources.toArray(new Resource[resources.size()])) {\r
 106             @Override\r
 107             public TransferableGraphSource compute(ReadGraph graph, Map<String,Object> hints) throws DatabaseException {\r
 108                 conf.exclusionFunction = TGRepresentationUtils.computeExclusionFunction(graph, resources, hints);\r
 109                 return DefaultCopyHandler.this.computeSource(graph, conf);\r
 110             }\r
 111         };\r
 112     }\r
 113 \r
 114     protected void fillTG(ReadGraph graph, HashSet<Representation> items, boolean cut) {\r
 115 \r
 116         try {\r
 117 \r
 118             Representation tgRepresentation = createTransferableGraph(graph, resources, cut);\r
 119             if(tgRepresentation != null) items.add(tgRepresentation);\r
 120             Representation tgSourceRepresentation = createTransferableGraphSource(graph, resources, cut);\r
 121             if(tgSourceRepresentation != null) items.add(tgSourceRepresentation);\r
 122 \r
 123             if(resources.size() == 1) {\r
 124                 Collection<Representation> representations = graph.syncRequest(new ResourceRead<Collection<Representation>>(resources.iterator().next()) {\r
 125                     @Override\r
 126                     public Collection<Representation> perform(ReadGraph graph) throws DatabaseException {\r
 127                         ArrayList<Representation> result = new ArrayList<Representation>();\r
 128                         Layer0X L0X = Layer0X.getInstance(graph);\r
 129                         for(Resource adapter : graph.getObjects(resource, L0X.HasRepresentation)) {\r
 130                             result.add(graph.adapt(adapter, Representation.class));\r
 131                         }\r
 132                         return result;\r
 133                     }\r
 134                 });\r
 135                 for (Representation r : representations)\r
 136                     items.add(r);\r
 137             }\r
 138 \r
 139         } catch (DatabaseException e) {\r
 140             Logger.defaultLogError(e);\r
 141         }\r
 142 \r
 143     }\r
 144 \r
 145     protected void fillCopyResource(ReadGraph graph, HashSet<Representation> items) {\r
 146         items.add(ClipboardUtils.createCopyResources(resources));\r
 147     }\r
 148 \r
 149     protected void fillCutResource(ReadGraph graph, HashSet<Representation> items) {\r
 150         items.add(ClipboardUtils.createCutResources(resources));\r
 151     }\r
 152 \r
 153     @Override\r
 154     public void copyToClipboard(ReadGraph graph, SimanticsClipboardBuilder clipboard) throws DatabaseException {\r
 155         HashSet<Representation> items = new HashSet<Representation>();\r
 156         fillTG(graph, items, false);\r
 157         fillCopyResource(graph, items);\r
 158         clipboard.addContent(items);\r
 159     }\r
 160 \r
 161     @Override\r
 162     public void cutToClipboard(ReadGraph graph, SimanticsClipboardBuilder clipboard) throws DatabaseException {\r
 163         HashSet<Representation> items = new HashSet<Representation>();\r
 164         fillTG(graph, items, true);\r
 165         fillCutResource(graph, items);\r
 166         clipboard.addContent(items);\r
 167     }\r
 168 \r
 169 }\r