bundles/org.simantics.modeling.ui/src/org/simantics/modeling/ui/modelBrowser2/contributions/RelationView.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.modeling.ui.modelBrowser2.contributions;\r
  13 \r
  14 import java.util.Collection;\r
  15 import java.util.Map;\r
  16 import java.util.function.Consumer;\r
  17 \r
  18 import org.simantics.Simantics;\r
  19 import org.simantics.browsing.ui.BuiltinKeys;\r
  20 import org.simantics.browsing.ui.NodeContext;\r
  21 import org.simantics.browsing.ui.Tester;\r
  22 import org.simantics.browsing.ui.graph.contributor.viewpoint.ContextInputCallbackViewpointContributor;\r
  23 import org.simantics.browsing.ui.graph.tester.GraphTesters;\r
  24 import org.simantics.databoard.Bindings;\r
  25 import org.simantics.db.ReadGraph;\r
  26 import org.simantics.db.RequestProcessor;\r
  27 import org.simantics.db.Resource;\r
  28 import org.simantics.db.Session;\r
  29 import org.simantics.db.common.primitiverequest.Adapter;\r
  30 import org.simantics.db.common.request.Queries;\r
  31 import org.simantics.db.exception.DatabaseException;\r
  32 import org.simantics.db.layer0.adapter.GenericRelationIndex;\r
  33 import org.simantics.db.request.Read;\r
  34 import org.simantics.layer0.Layer0;\r
  35 import org.simantics.modeling.ui.modelBrowser2.model.RelationViewNode;\r
  36 import org.simantics.operation.Layer0X;\r
  37 \r
  38 public class RelationView extends ContextInputCallbackViewpointContributor {\r
  39 \r
  40     public RelationView() {\r
  41         super(RelationViewNode.class);\r
  42     }\r
  43 \r
  44     @Override\r
  45     public Tester getNodeContextTester() {\r
  46         return GraphTesters.type(Layer0X.URIs.RelationView);\r
  47     }\r
  48 \r
  49     @Override\r
  50     public String getViewpointId() {\r
  51         return "Standard";\r
  52     }\r
  53 \r
  54     @Override\r
  55     protected void finalize() throws Throwable {\r
  56         //System.out.println("**** FINALIZING RelationView " + this);\r
  57         super.finalize();\r
  58     }\r
  59 \r
  60     @Override\r
  61     public void getContribution(ReadGraph graph, final NodeContext context, final Consumer<Collection<?>> callback) throws DatabaseException {\r
  62 \r
  63         final Session session = graph.getSession();\r
  64 \r
  65         RelationViewNode model = (RelationViewNode)context.getConstant(BuiltinKeys.INPUT);\r
  66         final Resource view = model.resource;\r
  67 \r
  68         final String filter = context.getConstant(BuiltinKeys.FILTER);\r
  69         Layer0 l0 = Layer0.getInstance(graph);\r
  70         Layer0X L0X = Layer0X.getInstance(graph);\r
  71 \r
  72         final Resource input = graph.getPossibleObject(view, l0.PartOf);\r
  73         final Resource relation = graph.getPossibleObject(view, L0X.AppliesRelation);\r
  74         final String bindingPattern = graph.getPossibleRelatedValue(view, L0X.HasBindingPattern, Bindings.STRING);\r
  75 \r
  76         final GenericRelationIndex index = graph.syncRequest(new org.simantics.db.common.primitiverequest.Adapter<GenericRelationIndex>(relation, GenericRelationIndex.class));\r
  77 \r
  78         // TODO: use DB ExternalRead instead of this listener hack which proliferates the index with listeners.\r
  79 \r
  80         index.addListener(session, input, new Runnable() {\r
  81             @Override\r
  82             public void run() {\r
  83                 Simantics.async(new Runnable() {\r
  84                     @Override\r
  85                     public void run() {\r
  86                         try {\r
  87                             callback.accept(compute(session, filter, bindingPattern, view, relation, input));\r
  88                         } catch (DatabaseException e) {\r
  89                             e.printStackTrace();\r
  90                         }\r
  91                     }\r
  92                 });\r
  93             }\r
  94         });\r
  95 \r
  96         callback.accept(compute(graph, filter, bindingPattern, view, relation, input));\r
  97 \r
  98     }\r
  99 \r
 100     Collection<?> compute(RequestProcessor processor, String filter, String bindingPattern, final Resource view, Resource relation, Resource input) throws DatabaseException {\r
 101         if (filter == null)\r
 102             filter = "";\r
 103 \r
 104         GenericRelationIndex index = processor.syncRequest(new Adapter<GenericRelationIndex>(relation, GenericRelationIndex.class));\r
 105         final Collection<Map<String, Object>> results = index.query(processor, filter, bindingPattern, new Object[] { input }, 1000);\r
 106 \r
 107         return processor.syncRequest(new Read<Collection<?>>() {\r
 108             @Override\r
 109             public Collection<?> perform(ReadGraph graph) throws DatabaseException {\r
 110                 RelationViewContributor contrib = graph.syncRequest(Queries.adapt(view, RelationViewContributor.class));\r
 111                 return contrib.getContribution(graph, results);\r
 112             }\r
 113         });\r
 114     }\r
 115 \r
 116 }\r