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

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