bundles/org.simantics.views.swt/src/org/simantics/views/swt/ModelledSupport.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2012 Association for Decentralized Information Management in\r
   3  * 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.views.swt;\r
  13 \r
  14 import org.eclipse.jface.viewers.ISelection;\r
  15 import org.simantics.Simantics;\r
  16 import org.simantics.browsing.ui.swt.widgets.impl.Widget;\r
  17 import org.simantics.browsing.ui.swt.widgets.impl.WidgetSupportImpl;\r
  18 import org.simantics.databoard.Bindings;\r
  19 import org.simantics.db.AsyncReadGraph;\r
  20 import org.simantics.db.Disposable;\r
  21 import org.simantics.db.ReadGraph;\r
  22 import org.simantics.db.Resource;\r
  23 import org.simantics.db.Session;\r
  24 import org.simantics.db.VirtualGraph;\r
  25 import org.simantics.db.WriteGraph;\r
  26 import org.simantics.db.common.request.UniqueRead;\r
  27 import org.simantics.db.common.request.WriteRequest;\r
  28 import org.simantics.db.common.utils.Logger;\r
  29 import org.simantics.db.exception.DatabaseException;\r
  30 import org.simantics.db.layer0.variable.Variable;\r
  31 import org.simantics.db.management.ISessionContext;\r
  32 import org.simantics.db.procedure.AsyncListener;\r
  33 import org.simantics.db.procedure.Listener;\r
  34 import org.simantics.scenegraph.ontology.ScenegraphResources;\r
  35 import org.simantics.ui.selection.AnyResource;\r
  36 import org.simantics.ui.selection.AnyVariable;\r
  37 import org.simantics.ui.selection.WorkbenchSelectionElement;\r
  38 import org.simantics.utils.datastructures.Pair;\r
  39 import org.simantics.utils.ui.ISelectionUtils;\r
  40 \r
  41 /**\r
  42  * @author Antti Villberg\r
  43  */\r
  44 public class ModelledSupport extends WidgetSupportImpl implements Disposable {\r
  45 \r
  46     private final ModelledView view;\r
  47     private InputListener listener;\r
  48     private boolean disposed = false;\r
  49     private Pair<Variable, Resource> previous = null;\r
  50 \r
  51     /**\r
  52      * @param modelledConfigurationComposite\r
  53      */\r
  54     public ModelledSupport(ModelledView view) {\r
  55         this.view = view;\r
  56     }\r
  57 \r
  58     @Override\r
  59     public void dispose() {\r
  60         \r
  61         disposed = true;\r
  62         \r
  63         if (listener != null)\r
  64             listener.dispose();\r
  65         \r
  66     }\r
  67 \r
  68     class InputListener implements AsyncListener<Pair<Variable, Resource>> {\r
  69 \r
  70         private boolean disposed = false;\r
  71 \r
  72         @Override\r
  73         public boolean isDisposed() {\r
  74             return this.disposed || ModelledSupport.this.disposed;\r
  75         }\r
  76 \r
  77         public void dispose() {\r
  78             this.disposed = true;\r
  79         }\r
  80 \r
  81         @Override\r
  82         public String toString() {\r
  83             return "InputListener@ModelledSupport@" + view; \r
  84         }\r
  85 \r
  86         @Override\r
  87         public void execute(AsyncReadGraph graph, final Pair<Variable, Resource> result) {\r
  88 \r
  89             if(previous != null && previous.equals(result)) return;\r
  90             previous = result;\r
  91 \r
  92             graph.getSession().async(new WriteRequest(Simantics.getSession().getService(VirtualGraph.class)) {\r
  93 \r
  94                 @Override\r
  95                 public void perform(WriteGraph graph) throws DatabaseException {\r
  96 \r
  97                     ScenegraphResources SG = ScenegraphResources.getInstance(graph);\r
  98 \r
  99                     Resource runtime = view.runtime;\r
 100 \r
 101                     if(result.first != null) {\r
 102                         String uri = result.first.getURI(graph);\r
 103                         graph.claimLiteral(runtime, SG.Runtime_HasVariable, uri, Bindings.STRING);\r
 104                     } else {\r
 105                         graph.deny(runtime, SG.Runtime_HasVariable);\r
 106                     }\r
 107 \r
 108                     if(result.second != null) {\r
 109                         graph.deny(runtime, SG.Runtime_HasResource);\r
 110                         graph.claim(runtime, SG.Runtime_HasResource, result.second);\r
 111                     } else {\r
 112                         graph.deny(runtime, SG.Runtime_HasResource);\r
 113                     }\r
 114 \r
 115                     view.fireInput();\r
 116 \r
 117                 }\r
 118 \r
 119             });\r
 120 \r
 121         }\r
 122 \r
 123         @Override\r
 124         public void exception(AsyncReadGraph graph, Throwable throwable) {\r
 125             Logger.defaultLogError(throwable);\r
 126         }\r
 127 \r
 128     }\r
 129 \r
 130     @SuppressWarnings({ "unchecked", "rawtypes" })\r
 131     @Override\r
 132     public void fireInput(final ISessionContext context, final Object input) {\r
 133 \r
 134         lastInput = input;\r
 135         lastContext = context;\r
 136 \r
 137         if (listener != null)\r
 138             listener.dispose();\r
 139 \r
 140         if (context == null)\r
 141             return;\r
 142 \r
 143         Session session = context.peekSession();\r
 144         if (session == null)\r
 145             return;\r
 146 \r
 147         listener = new InputListener();\r
 148 \r
 149         if(view.runtime != null) {\r
 150 \r
 151             session.async(new UniqueRead<Pair<Variable, Resource>>() {\r
 152 \r
 153                 private Variable extractVariable(ReadGraph graph, ISelection selection) throws DatabaseException {\r
 154 \r
 155                     WorkbenchSelectionElement single = ISelectionUtils.filterSingleSelection(selection, WorkbenchSelectionElement.class);\r
 156                     if(single != null) return single.getContent(new AnyVariable(graph));\r
 157                     return ISelectionUtils.filterSingleSelection((ISelection)lastInput, Variable.class);\r
 158 \r
 159                 }\r
 160 \r
 161                 private Resource extractResource(ReadGraph graph, ISelection selection) throws DatabaseException {\r
 162 \r
 163                     WorkbenchSelectionElement single = ISelectionUtils.filterSingleSelection(selection, WorkbenchSelectionElement.class);\r
 164                     if(single != null) return single.getContent(new AnyResource(graph));\r
 165                     return ISelectionUtils.filterSingleSelection((ISelection)lastInput, Resource.class);\r
 166 \r
 167                 }\r
 168 \r
 169                 @Override\r
 170                 public Pair<Variable, Resource> perform(ReadGraph graph) throws DatabaseException {\r
 171 \r
 172                     Variable resultVariable = null;\r
 173                     Resource resultResource = null; \r
 174 \r
 175                     if(lastInput instanceof ISelection) {\r
 176                         Variable var = extractVariable(graph, (ISelection)lastInput);\r
 177                         if(var != null) resultVariable = var;\r
 178                         Resource res = extractResource(graph, (ISelection)lastInput);\r
 179                         if(res != null) resultResource = res;\r
 180                     } else if (lastInput instanceof Resource) {\r
 181                         resultResource = (Resource)lastInput;\r
 182                     }\r
 183 \r
 184                     return Pair.make(resultVariable, resultResource);\r
 185 \r
 186                 }\r
 187 \r
 188             }, listener);\r
 189 \r
 190         } else {\r
 191 \r
 192             for(Widget widget : widgets) {\r
 193                 widget.setInput(context, input);\r
 194                 for (Listener listener : listeners)\r
 195                     listener.execute(input);\r
 196             }\r
 197 \r
 198         }\r
 199     }\r
 200 \r
 201 }\r