bundles/org.simantics.diagram/src/org/simantics/diagram/adapter/FlagClassFactory.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management
   3  * in 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.diagram.adapter;
  13
  14 import java.awt.Shape;
  15 import java.awt.geom.AffineTransform;
  16 import java.awt.geom.Rectangle2D;
  17 import java.util.ArrayList;
  18 import java.util.Collection;
  19 import java.util.Collections;
  20 import java.util.List;
  21 import java.util.Map;
  22 import java.util.regex.Pattern;
  23 import java.util.regex.PatternSyntaxException;
  24
  25 import org.simantics.databoard.Bindings;
  26 import org.simantics.databoard.binding.error.RuntimeBindingConstructionException;
  27 import org.simantics.databoard.util.Bean;
  28 import org.simantics.datatypes.literal.Font;
  29 import org.simantics.datatypes.literal.RGB;
  30 import org.simantics.db.AsyncReadGraph;
  31 import org.simantics.db.ReadGraph;
  32 import org.simantics.db.Resource;
  33 import org.simantics.db.Session;
  34 import org.simantics.db.WriteGraph;
  35 import org.simantics.db.common.procedure.adapter.TransientCacheListener;
  36 import org.simantics.db.common.request.ResourceRead;
  37 import org.simantics.db.common.request.TernaryRead;
  38 import org.simantics.db.common.request.WriteRequest;
  39 import org.simantics.db.exception.DatabaseException;
  40 import org.simantics.db.layer0.variable.Variable;
  41 import org.simantics.db.layer0.variable.Variables;
  42 import org.simantics.db.procedure.AsyncProcedure;
  43 import org.simantics.diagram.content.ResourceTerminal;
  44 import org.simantics.diagram.flag.AbstractFlagType;
  45 import org.simantics.diagram.flag.BasicFlagType;
  46 import org.simantics.diagram.flag.FlagSceneGraph;
  47 import org.simantics.diagram.flag.FlagUtil;
  48 import org.simantics.diagram.flag.IFlagType;
  49 import org.simantics.diagram.flag.IFlagType.FlagInfo;
  50 import org.simantics.diagram.flag.IFlagTypeReader;
  51 import org.simantics.diagram.function.All;
  52 import org.simantics.diagram.function.PredefinedVariables;
  53 import org.simantics.diagram.query.DiagramRequests;
  54 import org.simantics.diagram.query.FlagTables;
  55 import org.simantics.diagram.query.FlagTypeFilter;
  56 import org.simantics.diagram.query.FlagTypeFilters;
  57 import org.simantics.diagram.query.FlagTypeVisual;
  58 import org.simantics.diagram.query.FlagTypeVisuals;
  59 import org.simantics.diagram.stubs.DiagramResource;
  60 import org.simantics.diagram.synchronization.CompositeHintSynchronizer;
  61 import org.simantics.diagram.synchronization.IHintSynchronizer;
  62 import org.simantics.diagram.synchronization.SynchronizationHints;
  63 import org.simantics.diagram.synchronization.graph.DiagramGraphUtil;
  64 import org.simantics.diagram.synchronization.graph.FlagSynchronizer;
  65 import org.simantics.diagram.synchronization.graph.TransformSynchronizer;
  66 import org.simantics.diagram.ui.DiagramModelHints;
  67 import org.simantics.g2d.canvas.ICanvasContext;
  68 import org.simantics.g2d.diagram.IDiagram;
  69 import org.simantics.g2d.diagram.handler.Topology.Terminal;
  70 import org.simantics.g2d.element.ElementClass;
  71 import org.simantics.g2d.element.ElementUtils;
  72 import org.simantics.g2d.element.IElement;
  73 import org.simantics.g2d.element.handler.TextEditor;
  74 import org.simantics.g2d.element.handler.impl.StaticObjectAdapter;
  75 import org.simantics.g2d.elementclass.FlagClass;
  76 import org.simantics.g2d.elementclass.FlagClass.Mode;
  77 import org.simantics.g2d.elementclass.FlagHandler;
  78 import org.simantics.g2d.utils.Alignment;
  79 import org.simantics.g2d.utils.geom.DirectionSet;
  80 import org.simantics.layer0.Layer0;
  81 import org.simantics.modeling.ModelingResources;
  82 import org.simantics.modeling.template2d.ontology.Template2dResource;
  83 import org.simantics.structural2.modelingRules.IModelingRules;
  84 import org.simantics.utils.ui.ErrorLogger;
  85
  86 /**
  87  * @author Tuukka Lehtonen
  88  */
  89 public class FlagClassFactory extends SyncElementFactory {
  90
  91     private static final Bean[] NO_BEANS = {};
  92
  93     private static final IHintSynchronizer HINT_SYNCHRONIZER = new CompositeHintSynchronizer(FlagSynchronizer.INSTANCE, TransformSynchronizer.INSTANCE);
  94
  95     public static ElementClass createFlagClass(Resource elementClass, Resource terminalResource) {
  96         Terminal terminal = new ResourceTerminal(terminalResource, new AffineTransform(), DirectionSet.ANY);
  97         return FlagClass.create(terminal, FlagSceneGraph.INSTANCE).newClassWith(new StaticObjectAdapter(elementClass));
  98     }
  99
 100     @Override
 101     public void create(AsyncReadGraph graph, ICanvasContext canvas, IDiagram diagram, Resource elementType, AsyncProcedure<ElementClass> procedure) {
 102         DiagramResource DIA = graph.getService(DiagramResource.class);
 103         procedure.execute(graph, createFlagClass(DIA.Flag, DIA.Flag_Terminal));
 104     }
 105
 106     @Override
 107     public void load(ReadGraph g, ICanvasContext canvas, IDiagram diagram, Resource flag, IElement e) throws DatabaseException {
 108         Layer0 l0 = g.getService(Layer0.class);
 109         DiagramResource dr = g.getService(DiagramResource.class);
 110
 111         ElementClass ec = e.getElementClass();
 112         final FlagHandler fh = ec.getSingleItem(FlagHandler.class);
 113
 114         fh.connectData(e, flag, FlagUtil.getPossibleCounterpart(g, flag));
 115         fh.setExternal(e, FlagUtil.isExternal(g, flag));
 116
 117         TextEditor ed = ec.getAtMostOneItemOfClass(TextEditor.class);
 118         if (ed != null) {
 119             final Session session = g.getSession();
 120             ed.setModifier(e, new TextEditor.Modifier() {
 121                 @Override
 122                 public String getValue(IElement element) {
 123                     String s = ElementUtils.getText(element);
 124                     return s != null ? s : "";
 125                 }
 126
 127                 @Override
 128                 public String isValid(IElement element, String text) {
 129                     return null;
 130                 }
 131
 132                 @Override
 133                 public void modify(final IElement element, final String text) {
 134                     final Resource flag = (Resource) ElementUtils.getObject(element);
 135                     try {
 136                         session.syncRequest(new WriteRequest() {
 137                             @Override
 138                             public void perform(WriteGraph graph) throws DatabaseException {
 139                                 Layer0 l0 = Layer0.getInstance(graph);
 140                                 DiagramGraphUtil.setRelatedValue(graph, flag, l0.HasLabel, l0.String, text, Bindings.STRING);
 141                                 Resource otherFlag = FlagUtil.getPossibleCounterpart(graph, flag);
 142                                 if (otherFlag != null)
 143                                     DiagramGraphUtil.setRelatedValue(graph, otherFlag, l0.HasLabel, l0.String, text, Bindings.STRING);
 144                             }
 145                         });
 146                     } catch (DatabaseException e) {
 147                         ErrorLogger.defaultLogError("Flag label editing failed, see exception for details.", e);
 148                     }
 149                 }
 150             });
 151         }
 152
 153         Resource diagramRuntime = diagram.getHint(DiagramModelHints.KEY_DIAGRAM_RUNTIME_RESOURCE);
 154         AffineTransform at = DiagramGraphUtil.getDynamicAffineTransform(g, diagramRuntime, flag);
 155         ElementUtils.setTransform(e, at);
 156
 157         String label = g.getPossibleRelatedValue(flag, l0.HasLabel);
 158         if (label == null)
 159             label = "";
 160         ElementUtils.setText(e, label);
 161
 162         boolean shapeIsSet = false;
 163         boolean flagTextIsSet = false;
 164         boolean flagTypeIsSet = false;
 165         boolean textAreaIsSet = false;
 166
 167         // Defaults
 168         e.setHint(FlagClass.KEY_TEXT_HORIZONTAL_ALIGN, Alignment.LEADING);
 169         e.setHint(FlagClass.KEY_TEXT_VERTICAL_ALIGN, Alignment.CENTER);
 170
 171         IModelingRules modelingRules = diagram.getHint(DiagramModelHints.KEY_MODELING_RULES);
 172         if (modelingRules != null) {
 173             Resource connectionType = DiagramGraphUtil.getConnectionTypeForFlag(g, flag);
 174             IFlagTypeReader ftr = null;
 175             if (connectionType != null) {
 176                 //System.out.println("FLAG " + NameUtils.getSafeName(g, flag) + ", CONNECTION TYPE " + NameUtils.getSafeName(g, connectionType));
 177                 ftr = g.getPossibleAdapter(connectionType, IFlagTypeReader.class);
 178             }
 179             if (ftr == null) {
 180                 //System.out.println("FLAG " + NameUtils.getSafeName(g, flag) + ", NO CONNECTION TYPE");
 181                 ftr = g.getPossibleAdapter(flag, IFlagTypeReader.class);
 182             }
 183
 184             if (ftr != null) {
 185                 IFlagType ft = ftr.read(g, flag, modelingRules);
 186
 187                 FlagInfo info = ft.getInfo(g);
 188
 189                 Shape shape = info.getShape();
 190                 if (shape != null) {
 191                     e.setHint(FlagClass.KEY_SHAPE, shape);
 192                     shapeIsSet = true;
 193                 }
 194
 195                 FlagClass.Type type = info.getType();
 196                 if (type != null) {
 197                     e.setHint(FlagClass.KEY_FLAG_TYPE, type);
 198                     flagTypeIsSet = true;
 199                 }
 200
 201                 String[] flagText = info.getText();
 202                 if (flagText != null) {
 203                     e.setHint(FlagClass.KEY_FLAG_TEXT, flagText);
 204                     flagTextIsSet = true;
 205                 }
 206
 207                 if (info.getTextArea() != null) {
 208                     e.setHint(FlagClass.KEY_FLAG_TEXT_AREA, info.getTextArea());
 209                     textAreaIsSet = true;
 210                 }
 211
 212                 if (info.getHorizontalAlignment() != null)
 213                     e.setHint(FlagClass.KEY_TEXT_HORIZONTAL_ALIGN, info.getHorizontalAlignment());
 214                 if (info.getVerticalAlignment() != null)
 215                     e.setHint(FlagClass.KEY_TEXT_VERTICAL_ALIGN, info.getVerticalAlignment());
 216             }
 217         }
 218
 219         if (!flagTypeIsSet)
 220             // Fall back to reading flag type from a property.
 221             e.setHint(FlagClass.KEY_FLAG_TYPE, DiagramGraphUtil.toFlagType(dr, g.getPossibleObject(flag, dr.HasFlagType), FlagClass.Type.In));
 222         if (!flagTextIsSet)
 223 //            e.setHint(FlagClass.KEY_FLAG_TEXT, new String[] { label });
 224             e.setHint(FlagClass.KEY_FLAG_TEXT, g.syncRequest(DiagramRequests.getFlagText(flag)));
 225         if (!textAreaIsSet) {
 226             FlagClass.Type type = e.getHint(FlagClass.KEY_FLAG_TYPE);
 227             Mode mode = AbstractFlagType.getMode(g, flag);
 228             e.setHint(FlagClass.KEY_FLAG_TEXT_AREA, BasicFlagType.getArea(type, mode));
 229         }
 230         if (!shapeIsSet) {
 231             FlagClass.Type type = e.getHint(FlagClass.KEY_FLAG_TYPE);
 232             Mode mode = AbstractFlagType.getMode(g, flag);
 233             e.setHint(FlagClass.KEY_SHAPE, BasicFlagType.getShape(type, mode));
 234         }
 235
 236         e.setHint(SynchronizationHints.HINT_SYNCHRONIZER, HINT_SYNCHRONIZER);
 237         e.setHint(FlagSceneGraph.KEY_FLAG_VISUALS, NO_BEANS);
 238
 239         DiagramResource DIA = DiagramResource.getInstance(g);
 240         Layer0 L0 = Layer0.getInstance(g);
 241
 242         Resource template = diagramRuntime != null ? All.getTemplate(g, diagramRuntime) : null;
 243         Resource flagTable = getFlagTable(g, template, flag);
 244
 245         if (template != null && flagTable != null) {
 246
 247             Resource flagTypeVisual = getVisualOfFlag(g, template, flagTable, flag);
 248             if (flagTypeVisual != null) {
 249                 Template2dResource TEMPLATE2D = Template2dResource.getInstance(g);
 250                 float tableWidth = g.getRelatedValue(flagTable, TEMPLATE2D.FlagTable_HasWidth, Bindings.FLOAT);
 251                 Resource align = g.getPossibleObject(flagTable, TEMPLATE2D.FlagTable_HasAlignment);
 252                 float height = g.getRelatedValue(flagTable, TEMPLATE2D.FlagTable_HasRowHeigth, Bindings.FLOAT);
 253                 float halfHeight = height / 2;
 254                 float horizontalOffset = tableWidth;
 255
 256                 if (align != null) {
 257                     if (align.equals(TEMPLATE2D.FlagTable_Alignment_Left)) {
 258                         horizontalOffset = 0.0f;
 259                     } else if (align.equals(TEMPLATE2D.FlagTable_Alignment_Right)) {
 260                         tableWidth = -tableWidth;
 261                         horizontalOffset = -horizontalOffset;
 262                     }
 263                 }
 264
 265                 Collection<Resource> monitorsAndTexts = g.getObjects(flagTypeVisual, L0.ConsistsOf);
 266                 List<Bean> flagVisuals = Collections.emptyList();
 267                 if (!monitorsAndTexts.isEmpty()) {
 268                     flagVisuals = new ArrayList<Bean>(monitorsAndTexts.size());
 269
 270                     ModelingResources MOD = ModelingResources.getInstance(g);
 271                     Resource diagramResource = diagram.getHint(DiagramModelHints.KEY_DIAGRAM_RESOURCE);
 272                     Resource compositeResource = g.getSingleObject(diagramResource, MOD.DiagramToComposite);
 273                     Variable compositeVariable = Variables.getVariable(g, compositeResource);
 274
 275                     for (Resource visual : monitorsAndTexts) {
 276                         if (!acceptVisual(g, flag, visual))
 277                             continue;
 278
 279                         if (g.isInstanceOf(visual, DIA.Scenegraph_Monitor)) {
 280                             FlagTextInfo i = g.syncRequest(new ReadFlagTextInfo(visual), TransientCacheListener.<FlagTextInfo>instance());
 281                             FlagTextInfo monitorInfo = (FlagTextInfo) i.clone();
 282                             if (monitorInfo.transform != null)
 283                                 monitorInfo.transform[4] += horizontalOffset;
 284
 285                             String path = g.getRelatedValue(visual, DIA.Scenegraph_Monitor_reference, Bindings.STRING);
 286                             String value = "";
 287                             if (path != null && path.length() > 0) {
 288                                 value = evaluatePath(g,flag,path);
 289                             }
 290                             monitorInfo.text = value;
 291                             monitorInfo.id = Long.toString(visual.getResourceId());
 292
 293                             flagVisuals.add(monitorInfo);
 294                         } else if (g.isInstanceOf(visual, DIA.Scenegraph_Text)) {
 295                             FlagTextInfo i = g.syncRequest(new ReadFlagTextInfo(visual), TransientCacheListener.<FlagTextInfo>instance());
 296                             FlagTextInfo info = (FlagTextInfo) i.clone();
 297                             if (info.transform != null)
 298                                 info.transform[4] += horizontalOffset;
 299
 300                             String path = g.getRelatedValue(visual, DIA.Scenegraph_Text_text, Bindings.STRING);
 301                             if (path != null && path.length() > 0) {
 302                                 info.text = path;
 303                             }
 304                             info.id = Long.toString(visual.getResourceId());
 305
 306                             flagVisuals.add(info);
 307                         } else if (g.isInstanceOf(visual, DIA.Scenegraph_SVGImage)) {
 308                             SVGImageInfo info = g.syncRequest(new ReadSVGImageInfo(visual, compositeResource, compositeVariable), TransientCacheListener.<SVGImageInfo>instance());
 309                             flagVisuals.add(info);
 310                         }
 311                     }
 312                 }
 313
 314                 if (flagVisuals.size() > 0) {
 315                     // Make sure that the flag shape is set to something that
 316                     // should contain the flag visual to make selection borders
 317                     // work properly.
 318                     Rectangle2D newShape = new Rectangle2D.Double();
 319                     newShape.setFrameFromDiagonal(0, -halfHeight, tableWidth, halfHeight);
 320                     e.setHint(FlagClass.KEY_SHAPE, newShape);
 321                     e.setHint(FlagSceneGraph.KEY_FLAG_VISUALS, flagVisuals.toArray(NO_BEANS));
 322                 }
 323             }
 324         }
 325     }
 326
 327     private static String evaluatePath(ReadGraph graph, Resource resource, String path) throws DatabaseException{
 328         Variable resourceVariable = Variables.getPossibleVariable(graph, resource);
 329         if (resourceVariable == null)
 330             return "";
 331         return evaluatePath(graph, resource, resourceVariable, path);
 332     }
 333
 334     private static String evaluatePath(ReadGraph graph, Resource resource, Variable resourceVariable, String path) throws DatabaseException{
 335         PredefinedVariables vars = PredefinedVariables.getInstance();
 336         Variable property = vars.getVariable(graph, path, resource, resourceVariable);
 337         if (property == null)
 338             return "";
 339         Object value = property.getPossibleValue(graph);
 340         if (value == null || !(value instanceof String))
 341             return "";
 342         return value.toString();
 343     }
 344
 345     static class ReadSVGImageInfo extends TernaryRead<Resource, Resource, Variable, SVGImageInfo> {
 346
 347         public ReadSVGImageInfo(Resource svgImageNode, Resource composite, Variable compositeVariable) {
 348             super(svgImageNode, composite, compositeVariable);
 349         }
 350
 351         @Override
 352         public SVGImageInfo perform(ReadGraph graph) throws DatabaseException {
 353             SVGImageInfo info = new SVGImageInfo();
 354             DiagramResource DIA = DiagramResource.getInstance(graph);
 355             info.id = Long.toString(parameter.getResourceId());
 356             Resource document = graph.getPossibleObject(parameter, DIA.Scenegraph_SVGImage_document);
 357             if (document != null) {
 358                 Template2dResource TMPL = Template2dResource.getInstance(graph);
 359                 String path = graph.getPossibleRelatedValue(document, TMPL.Profiles_VariableReference_path, Bindings.STRING);
 360                 if (path != null) {
 361                     String svg = evaluatePath(graph, parameter2, parameter3, path);
 362                     if (svg != null && !svg.isEmpty())
 363                         info.svgDocument = svg;
 364                     //System.out.println("svgDocument: " + info.svgDocument);
 365                 }
 366             }
 367             info.transform = graph.getPossibleRelatedValue(parameter, DIA.Scenegraph_SVGImage_transform, Bindings.DOUBLE_ARRAY);
 368             return info;
 369         }
 370
 371     }
 372
 373     static class ReadFlagTextInfo extends ResourceRead<FlagTextInfo> {
 374
 375         public ReadFlagTextInfo(Resource textNode) {
 376             super(textNode);
 377         }
 378
 379         @Override
 380         public FlagTextInfo perform(ReadGraph graph) throws DatabaseException {
 381             return createTextInfo(graph, resource);
 382         }
 383
 384     }
 385
 386     /**
 387      * @param g
 388      * @param visual
 389      * @return
 390      * @throws DatabaseException
 391      * @throws RuntimeBindingConstructionException
 392      */
 393     private static FlagTextInfo createTextInfo(ReadGraph g, Resource visual) throws DatabaseException {
 394         DiagramResource DIA = DiagramResource.getInstance(g);
 395         //Template2d TEMPLATE2D = Template2d.getInstance(g);
 396         //Layer0 L0 = Layer0.getInstance(g);
 397
 398         FlagTextInfo info = new FlagTextInfo();
 399         info.id = Long.toString(visual.getResourceId());
 400
 401         info.font = g.getPossibleRelatedValue2(visual, DIA.Scenegraph_AbstractText_font, Bindings.getBindingUnchecked(Font.class));
 402         info.color = g.getPossibleRelatedValue2(visual, DIA.Scenegraph_AbstractText_color, RGB.Integer.BINDING/*Bindings.getBindingUnchecked(RGB.Integer.class)*/);
 403         info.borderColor = g.getPossibleRelatedValue2(visual, DIA.Scenegraph_AbstractText_borderColor, RGB.Integer.BINDING/*Bindings.getBindingUnchecked(RGB.Integer.class)*/);
 404         info.backgroundColor = g.getPossibleRelatedValue2(visual, DIA.Scenegraph_AbstractText_backgroundColor, RGB.Integer.BINDING/*Bindings.getBindingUnchecked(RGB.Integer.class)*/);
 405         Float width = g.getPossibleRelatedValue2(visual, DIA.Scenegraph_AbstractText_width, Bindings.getBindingUnchecked(Float.class));
 406         if (width != null)
 407             info.width = width;
 408
 409         Float borderWidth = g.getPossibleRelatedValue2(visual, DIA.Scenegraph_AbstractText_borderWidth, Bindings.getBindingUnchecked(Float.class));
 410         if (borderWidth != null)
 411             info.borderWidth = borderWidth;
 412
 413         Boolean wrapText = g.getRelatedValue2(visual, DIA.Scenegraph_AbstractText_wrapText, Bindings.BOOLEAN);
 414         if (wrapText != null)
 415             info.wrapText = wrapText;
 416
 417         info.hAlignment = Alignment.LEADING;
 418         Byte hAlignment = g.getPossibleRelatedValue2(visual, DIA.Scenegraph_AbstractText_horizontalAlignment, Bindings.BYTE);
 419         if (hAlignment != null) {
 420             if (hAlignment == 1)
 421                 info.hAlignment = Alignment.TRAILING;
 422             else if (hAlignment == 2)
 423                 info.hAlignment = Alignment.CENTER;
 424         }
 425
 426         info.vAlignment = Alignment.LEADING;
 427         Byte vAlignment = g.getPossibleRelatedValue2(visual, DIA.Scenegraph_AbstractText_verticalAlignment, Bindings.BYTE);
 428         if (vAlignment != null) {
 429             if (vAlignment == 1)
 430                 info.vAlignment = Alignment.TRAILING;
 431             else if (vAlignment == 2)
 432                 info.vAlignment = Alignment.CENTER;
 433             else if (vAlignment == 3)
 434                 info.vAlignment = Alignment.BASELINE;
 435         }
 436
 437         info.transform = g.getPossibleRelatedValue2(visual, DIA.Scenegraph_AbstractText_transform, Bindings.getBindingUnchecked(double[].class));
 438         return info;
 439     }
 440
 441     private static Resource getFlagTable(ReadGraph g, Resource template, Resource flag) throws DatabaseException {
 442         if (template == null || flag == null)
 443             return null;
 444
 445         DiagramResource DIA = DiagramResource.getInstance(g);
 446         String tableName = g.getPossibleRelatedValue(flag, DIA.Flag_HasIOTableBinding, Bindings.STRING);
 447         if (tableName == null)
 448             return null;
 449
 450         Map<String, Resource> flagTables = g.syncRequest(new FlagTables(template), TransientCacheListener.<Map<String, Resource>>instance());
 451         return flagTables.get(tableName);
 452     }
 453
 454     private Resource getVisualOfFlag(ReadGraph g, Resource template, Resource flagTable, Resource flag) throws DatabaseException {
 455         if (template == null || flagTable == null || flag == null)
 456             return null;
 457
 458         // First make sure that there are possible visuals.
 459         // There's no point in proceeding if no visuals exist.
 460         List<FlagTypeVisual> flagTypeVisuals = g.syncRequest( new FlagTypeVisuals(flagTable),
 461                 TransientCacheListener.<List<FlagTypeVisual>>instance());
 462         if (flagTypeVisuals == null || flagTypeVisuals.isEmpty())
 463             return null;
 464
 465         Variable flagVariable = Variables.getPossibleVariable(g, flag);
 466         if (flagVariable == null)
 467             return null;
 468
 469         for (FlagTypeVisual visual : flagTypeVisuals) {
 470             Resource visualComposite = visual.getVisualComposite();
 471
 472             String filterReference = visual.getFilteredPropertyReference();
 473             if (filterReference == null || filterReference.isEmpty())
 474                 return visualComposite;
 475
 476             String filterPattern = visual.getFilterPattern();
 477             if (filterPattern == null || filterPattern.isEmpty())
 478                 return visualComposite;
 479
 480             String value = evaluatePath(g, flag, flagVariable, filterReference);
 481             if (value == null)
 482                 return visualComposite;
 483
 484             try {
 485                 if (!Pattern.matches(filterPattern, value)) {
 486                     // filter is defined but property don't match
 487                     continue;
 488                 }
 489             } catch (PatternSyntaxException ex) {
 490                 ErrorLogger.defaultLogError(ex);
 491                 continue;
 492             }
 493
 494             return visualComposite;
 495         }
 496
 497         return null;
 498     }
 499
 500     /**
 501      * @param graph
 502      * @param flag the flag to which to apply the filter reference paths
 503      * @param visual the visual to look for filters from
 504      * @return <code>true</code> if filter passes, <code>false</code> if not
 505      * @throws DatabaseException
 506      */
 507     private boolean acceptVisual(ReadGraph graph, Resource flag, Resource visual) throws DatabaseException {
 508         List<FlagTypeFilter> filters = graph.syncRequest(new FlagTypeFilters(visual),
 509                 TransientCacheListener.<List<FlagTypeFilter>>instance());
 510         if (filters.isEmpty())
 511             return true;
 512
 513         Variable flagVariable = Variables.getPossibleVariable(graph, flag);
 514         if (flagVariable == null)
 515             return false;
 516
 517         for (FlagTypeFilter filter : filters) {
 518             String reference = filter.getReference();
 519             if (reference == null || reference.isEmpty())
 520                 continue;
 521
 522             String pattern = filter.getPattern();
 523             if (pattern == null || pattern.isEmpty())
 524                 continue;
 525
 526             String value = evaluatePath(graph, flag, flagVariable, reference);
 527             if (value == null)
 528                 continue;
 529
 530             try {
 531                 if (Pattern.matches(pattern, value) == filter.isMatchRequired()) {
 532                     return true;
 533                 }
 534             } catch (PatternSyntaxException ex) {
 535                 ErrorLogger.defaultLogError(ex);
 536                 continue;
 537             }
 538         }
 539
 540         return false;
 541     }
 542
 543 }