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.Font;
  15 import java.awt.Shape;
  16 import java.awt.geom.AffineTransform;
  17 import java.awt.geom.Rectangle2D;
  18 import java.util.ArrayList;
  19 import java.util.Collection;
  20 import java.util.Collections;
  21 import java.util.List;
  22 import java.util.Map;
  23 import java.util.regex.Pattern;
  24 import java.util.regex.PatternSyntaxException;
  25
  26 import org.simantics.databoard.Bindings;
  27 import org.simantics.databoard.binding.error.RuntimeBindingConstructionException;
  28 import org.simantics.databoard.util.Bean;
  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, canvas);
 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                 Font flagFont = info.getFont();
 208                 if(flagFont != null) {
 209                     e.setHint(FlagClass.KEY_FLAG_FONT, flagFont);
 210                 }
 211
 212                 if (info.getTextArea() != null) {
 213                     e.setHint(FlagClass.KEY_FLAG_TEXT_AREA, info.getTextArea());
 214                     textAreaIsSet = true;
 215                 }
 216
 217                 if (info.getHorizontalAlignment() != null)
 218                     e.setHint(FlagClass.KEY_TEXT_HORIZONTAL_ALIGN, info.getHorizontalAlignment());
 219                 if (info.getVerticalAlignment() != null)
 220                     e.setHint(FlagClass.KEY_TEXT_VERTICAL_ALIGN, info.getVerticalAlignment());
 221             }
 222         }
 223
 224         if (!flagTypeIsSet)
 225             // Fall back to reading flag type from a property.
 226             e.setHint(FlagClass.KEY_FLAG_TYPE, DiagramGraphUtil.toFlagType(dr, g.getPossibleObject(flag, dr.HasFlagType), FlagClass.Type.In));
 227         if (!flagTextIsSet)
 228 //            e.setHint(FlagClass.KEY_FLAG_TEXT, new String[] { label });
 229             e.setHint(FlagClass.KEY_FLAG_TEXT, g.syncRequest(DiagramRequests.getFlagText(flag)));
 230         if (!textAreaIsSet) {
 231             FlagClass.Type type = e.getHint(FlagClass.KEY_FLAG_TYPE);
 232             Mode mode = AbstractFlagType.getMode(g, flag);
 233             e.setHint(FlagClass.KEY_FLAG_TEXT_AREA, BasicFlagType.getArea(type, mode));
 234         }
 235         if (!shapeIsSet) {
 236             FlagClass.Type type = e.getHint(FlagClass.KEY_FLAG_TYPE);
 237             Mode mode = AbstractFlagType.getMode(g, flag);
 238             e.setHint(FlagClass.KEY_SHAPE, BasicFlagType.getShape(type, mode));
 239         }
 240
 241         e.setHint(SynchronizationHints.HINT_SYNCHRONIZER, HINT_SYNCHRONIZER);
 242         e.setHint(FlagSceneGraph.KEY_FLAG_VISUALS, NO_BEANS);
 243
 244         DiagramResource DIA = DiagramResource.getInstance(g);
 245         Layer0 L0 = Layer0.getInstance(g);
 246
 247         Resource template = diagramRuntime != null ? All.getTemplate(g, diagramRuntime) : null;
 248         Resource flagTable = getFlagTable(g, template, flag);
 249
 250         if (template != null && flagTable != null) {
 251
 252             Resource flagTypeVisual = getVisualOfFlag(g, template, flagTable, flag);
 253             if (flagTypeVisual != null) {
 254                 Template2dResource TEMPLATE2D = Template2dResource.getInstance(g);
 255                 float tableWidth = g.getRelatedValue(flagTable, TEMPLATE2D.FlagTable_HasWidth, Bindings.FLOAT);
 256                 Resource align = g.getPossibleObject(flagTable, TEMPLATE2D.FlagTable_HasAlignment);
 257                 float height = g.getRelatedValue(flagTable, TEMPLATE2D.FlagTable_HasRowHeigth, Bindings.FLOAT);
 258                 float halfHeight = height / 2;
 259                 float horizontalOffset = tableWidth;
 260
 261                 if (align != null) {
 262                     if (align.equals(TEMPLATE2D.FlagTable_Alignment_Left)) {
 263                         horizontalOffset = 0.0f;
 264                     } else if (align.equals(TEMPLATE2D.FlagTable_Alignment_Right)) {
 265                         tableWidth = -tableWidth;
 266                         horizontalOffset = -horizontalOffset;
 267                     }
 268                 }
 269
 270                 Collection<Resource> monitorsAndTexts = g.getObjects(flagTypeVisual, L0.ConsistsOf);
 271                 List<Bean> flagVisuals = Collections.emptyList();
 272                 if (!monitorsAndTexts.isEmpty()) {
 273                     flagVisuals = new ArrayList<Bean>(monitorsAndTexts.size());
 274
 275                     ModelingResources MOD = ModelingResources.getInstance(g);
 276                     Resource diagramResource = diagram.getHint(DiagramModelHints.KEY_DIAGRAM_RESOURCE);
 277                     Resource compositeResource = g.getSingleObject(diagramResource, MOD.DiagramToComposite);
 278                     Variable compositeVariable = Variables.getVariable(g, compositeResource);
 279
 280                     for (Resource visual : monitorsAndTexts) {
 281                         if (!acceptVisual(g, flag, visual))
 282                             continue;
 283
 284                         if (g.isInstanceOf(visual, DIA.Scenegraph_Monitor)) {
 285                             FlagTextInfo i = g.syncRequest(new ReadFlagTextInfo(visual), TransientCacheListener.<FlagTextInfo>instance());
 286                             FlagTextInfo monitorInfo = (FlagTextInfo) i.clone();
 287                             if (monitorInfo.transform != null)
 288                                 monitorInfo.transform[4] += horizontalOffset;
 289
 290                             String path = g.getRelatedValue(visual, DIA.Scenegraph_Monitor_reference, Bindings.STRING);
 291                             String value = "";
 292                             if (path != null && path.length() > 0) {
 293                                 value = evaluatePath(g,flag,path);
 294                             }
 295                             monitorInfo.text = value;
 296                             monitorInfo.id = Long.toString(visual.getResourceId());
 297
 298                             flagVisuals.add(monitorInfo);
 299                         } else if (g.isInstanceOf(visual, DIA.Scenegraph_Text)) {
 300                             FlagTextInfo i = g.syncRequest(new ReadFlagTextInfo(visual), TransientCacheListener.<FlagTextInfo>instance());
 301                             FlagTextInfo info = (FlagTextInfo) i.clone();
 302                             if (info.transform != null)
 303                                 info.transform[4] += horizontalOffset;
 304
 305                             String path = g.getRelatedValue(visual, DIA.Scenegraph_Text_text, Bindings.STRING);
 306                             if (path != null && path.length() > 0) {
 307                                 info.text = path;
 308                             }
 309                             info.id = Long.toString(visual.getResourceId());
 310
 311                             flagVisuals.add(info);
 312                         } else if (g.isInstanceOf(visual, DIA.Scenegraph_SVGImage)) {
 313                             SVGImageInfo info = g.syncRequest(new ReadSVGImageInfo(visual, compositeResource, compositeVariable), TransientCacheListener.<SVGImageInfo>instance());
 314                             flagVisuals.add(info);
 315                         }
 316                     }
 317                 }
 318
 319                 if (flagVisuals.size() > 0) {
 320                     // Make sure that the flag shape is set to something that
 321                     // should contain the flag visual to make selection borders
 322                     // work properly.
 323                     Rectangle2D newShape = new Rectangle2D.Double();
 324                     newShape.setFrameFromDiagonal(0, -halfHeight, tableWidth, halfHeight);
 325                     e.setHint(FlagClass.KEY_SHAPE, newShape);
 326                     e.setHint(FlagSceneGraph.KEY_FLAG_VISUALS, flagVisuals.toArray(NO_BEANS));
 327                 }
 328             }
 329         }
 330     }
 331
 332     private static String evaluatePath(ReadGraph graph, Resource resource, String path) throws DatabaseException{
 333         Variable resourceVariable = Variables.getPossibleVariable(graph, resource);
 334         if (resourceVariable == null)
 335             return "";
 336         return evaluatePath(graph, resource, resourceVariable, path);
 337     }
 338
 339     private static String evaluatePath(ReadGraph graph, Resource resource, Variable resourceVariable, String path) throws DatabaseException{
 340         PredefinedVariables vars = PredefinedVariables.getInstance();
 341         Variable property = vars.getVariable(graph, path, resource, resourceVariable);
 342         if (property == null)
 343             return "";
 344         Object value = property.getPossibleValue(graph);
 345         if (value == null || !(value instanceof String))
 346             return "";
 347         return value.toString();
 348     }
 349
 350     static class ReadSVGImageInfo extends TernaryRead<Resource, Resource, Variable, SVGImageInfo> {
 351
 352         public ReadSVGImageInfo(Resource svgImageNode, Resource composite, Variable compositeVariable) {
 353             super(svgImageNode, composite, compositeVariable);
 354         }
 355
 356         @Override
 357         public SVGImageInfo perform(ReadGraph graph) throws DatabaseException {
 358             SVGImageInfo info = new SVGImageInfo();
 359             DiagramResource DIA = DiagramResource.getInstance(graph);
 360             info.id = Long.toString(parameter.getResourceId());
 361             Resource document = graph.getPossibleObject(parameter, DIA.Scenegraph_SVGImage_document);
 362             if (document != null) {
 363                 Template2dResource TMPL = Template2dResource.getInstance(graph);
 364                 String path = graph.getPossibleRelatedValue(document, TMPL.Profiles_VariableReference_path, Bindings.STRING);
 365                 if (path != null) {
 366                     String svg = evaluatePath(graph, parameter2, parameter3, path);
 367                     if (svg != null && !svg.isEmpty())
 368                         info.svgDocument = svg;
 369                     //System.out.println("svgDocument: " + info.svgDocument);
 370                 }
 371             }
 372             info.transform = graph.getPossibleRelatedValue(parameter, DIA.Scenegraph_SVGImage_transform, Bindings.DOUBLE_ARRAY);
 373             return info;
 374         }
 375
 376     }
 377
 378     static class ReadFlagTextInfo extends ResourceRead<FlagTextInfo> {
 379
 380         public ReadFlagTextInfo(Resource textNode) {
 381             super(textNode);
 382         }
 383
 384         @Override
 385         public FlagTextInfo perform(ReadGraph graph) throws DatabaseException {
 386             return createTextInfo(graph, resource);
 387         }
 388
 389     }
 390
 391     /**
 392      * @param g
 393      * @param visual
 394      * @return
 395      * @throws DatabaseException
 396      * @throws RuntimeBindingConstructionException
 397      */
 398     private static FlagTextInfo createTextInfo(ReadGraph g, Resource visual) throws DatabaseException {
 399         DiagramResource DIA = DiagramResource.getInstance(g);
 400         //Template2d TEMPLATE2D = Template2d.getInstance(g);
 401         //Layer0 L0 = Layer0.getInstance(g);
 402
 403         FlagTextInfo info = new FlagTextInfo();
 404         info.id = Long.toString(visual.getResourceId());
 405
 406         info.font = g.getPossibleRelatedValue2(visual, DIA.Scenegraph_AbstractText_font, Bindings.getBindingUnchecked(Font.class));
 407         info.color = g.getPossibleRelatedValue2(visual, DIA.Scenegraph_AbstractText_color, RGB.Integer.BINDING/*Bindings.getBindingUnchecked(RGB.Integer.class)*/);
 408         info.borderColor = g.getPossibleRelatedValue2(visual, DIA.Scenegraph_AbstractText_borderColor, RGB.Integer.BINDING/*Bindings.getBindingUnchecked(RGB.Integer.class)*/);
 409         info.backgroundColor = g.getPossibleRelatedValue2(visual, DIA.Scenegraph_AbstractText_backgroundColor, RGB.Integer.BINDING/*Bindings.getBindingUnchecked(RGB.Integer.class)*/);
 410         Float width = g.getPossibleRelatedValue2(visual, DIA.Scenegraph_AbstractText_width, Bindings.getBindingUnchecked(Float.class));
 411         if (width != null)
 412             info.width = width;
 413
 414         Float borderWidth = g.getPossibleRelatedValue2(visual, DIA.Scenegraph_AbstractText_borderWidth, Bindings.getBindingUnchecked(Float.class));
 415         if (borderWidth != null)
 416             info.borderWidth = borderWidth;
 417
 418         Boolean wrapText = g.getRelatedValue2(visual, DIA.Scenegraph_AbstractText_wrapText, Bindings.BOOLEAN);
 419         if (wrapText != null)
 420             info.wrapText = wrapText;
 421
 422         info.hAlignment = Alignment.LEADING;
 423         Byte hAlignment = g.getPossibleRelatedValue2(visual, DIA.Scenegraph_AbstractText_horizontalAlignment, Bindings.BYTE);
 424         if (hAlignment != null) {
 425             if (hAlignment == 1)
 426                 info.hAlignment = Alignment.TRAILING;
 427             else if (hAlignment == 2)
 428                 info.hAlignment = Alignment.CENTER;
 429         }
 430
 431         info.vAlignment = Alignment.LEADING;
 432         Byte vAlignment = g.getPossibleRelatedValue2(visual, DIA.Scenegraph_AbstractText_verticalAlignment, Bindings.BYTE);
 433         if (vAlignment != null) {
 434             if (vAlignment == 1)
 435                 info.vAlignment = Alignment.TRAILING;
 436             else if (vAlignment == 2)
 437                 info.vAlignment = Alignment.CENTER;
 438             else if (vAlignment == 3)
 439                 info.vAlignment = Alignment.BASELINE;
 440         }
 441
 442         info.transform = g.getPossibleRelatedValue2(visual, DIA.Scenegraph_AbstractText_transform, Bindings.getBindingUnchecked(double[].class));
 443         return info;
 444     }
 445
 446     private static Resource getFlagTable(ReadGraph g, Resource template, Resource flag) throws DatabaseException {
 447         if (template == null || flag == null)
 448             return null;
 449
 450         DiagramResource DIA = DiagramResource.getInstance(g);
 451         String tableName = g.getPossibleRelatedValue(flag, DIA.Flag_HasIOTableBinding, Bindings.STRING);
 452         if (tableName == null)
 453             return null;
 454
 455         Map<String, Resource> flagTables = g.syncRequest(new FlagTables(template), TransientCacheListener.<Map<String, Resource>>instance());
 456         return flagTables.get(tableName);
 457     }
 458
 459     private Resource getVisualOfFlag(ReadGraph g, Resource template, Resource flagTable, Resource flag) throws DatabaseException {
 460         if (template == null || flagTable == null || flag == null)
 461             return null;
 462
 463         // First make sure that there are possible visuals.
 464         // There's no point in proceeding if no visuals exist.
 465         List<FlagTypeVisual> flagTypeVisuals = g.syncRequest( new FlagTypeVisuals(flagTable),
 466                 TransientCacheListener.<List<FlagTypeVisual>>instance());
 467         if (flagTypeVisuals == null || flagTypeVisuals.isEmpty())
 468             return null;
 469
 470         Variable flagVariable = Variables.getPossibleVariable(g, flag);
 471         if (flagVariable == null)
 472             return null;
 473
 474         for (FlagTypeVisual visual : flagTypeVisuals) {
 475             Resource visualComposite = visual.getVisualComposite();
 476
 477             String filterReference = visual.getFilteredPropertyReference();
 478             if (filterReference == null || filterReference.isEmpty())
 479                 return visualComposite;
 480
 481             String filterPattern = visual.getFilterPattern();
 482             if (filterPattern == null || filterPattern.isEmpty())
 483                 return visualComposite;
 484
 485             String value = evaluatePath(g, flag, flagVariable, filterReference);
 486             if (value == null)
 487                 return visualComposite;
 488
 489             try {
 490                 if (!Pattern.matches(filterPattern, value)) {
 491                     // filter is defined but property don't match
 492                     continue;
 493                 }
 494             } catch (PatternSyntaxException ex) {
 495                 ErrorLogger.defaultLogError(ex);
 496                 continue;
 497             }
 498
 499             return visualComposite;
 500         }
 501
 502         return null;
 503     }
 504
 505     /**
 506      * @param graph
 507      * @param flag the flag to which to apply the filter reference paths
 508      * @param visual the visual to look for filters from
 509      * @return <code>true</code> if filter passes, <code>false</code> if not
 510      * @throws DatabaseException
 511      */
 512     private boolean acceptVisual(ReadGraph graph, Resource flag, Resource visual) throws DatabaseException {
 513         List<FlagTypeFilter> filters = graph.syncRequest(new FlagTypeFilters(visual),
 514                 TransientCacheListener.<List<FlagTypeFilter>>instance());
 515         if (filters.isEmpty())
 516             return true;
 517
 518         Variable flagVariable = Variables.getPossibleVariable(graph, flag);
 519         if (flagVariable == null)
 520             return false;
 521
 522         for (FlagTypeFilter filter : filters) {
 523             String reference = filter.getReference();
 524             if (reference == null || reference.isEmpty())
 525                 continue;
 526
 527             String pattern = filter.getPattern();
 528             if (pattern == null || pattern.isEmpty())
 529                 continue;
 530
 531             String value = evaluatePath(graph, flag, flagVariable, reference);
 532             if (value == null)
 533                 continue;
 534
 535             try {
 536                 if (Pattern.matches(pattern, value) == filter.isMatchRequired()) {
 537                     return true;
 538                 }
 539             } catch (PatternSyntaxException ex) {
 540                 ErrorLogger.defaultLogError(ex);
 541                 continue;
 542             }
 543         }
 544
 545         return false;
 546     }
 547
 548 }