bundles/org.simantics.browsing.ui.graph.impl/src/org/simantics/browsing/ui/graph/impl/PropertyViewpointFactory.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.browsing.ui.graph.impl;
  13
  14 import java.util.ArrayList;
  15 import java.util.Collection;
  16 import java.util.HashSet;
  17 import java.util.Set;
  18
  19 import org.simantics.browsing.ui.BuiltinKeys.ViewpointKey;
  20 import org.simantics.browsing.ui.NodeContext;
  21 import org.simantics.browsing.ui.PrimitiveQueryUpdater;
  22 import org.simantics.browsing.ui.common.property.IProperty;
  23 import org.simantics.browsing.ui.content.Viewpoint;
  24 import org.simantics.browsing.ui.content.ViewpointFactory;
  25 import org.simantics.db.ReadGraph;
  26 import org.simantics.db.Resource;
  27 import org.simantics.db.Statement;
  28 import org.simantics.db.common.ResourceArray;
  29 import org.simantics.db.exception.DatabaseException;
  30 import org.simantics.db.impl.RelationContextImpl;
  31 import org.simantics.layer0.Layer0;
  32
  33 /**
  34  * A basic viewpoint which follows the Has Property relation to show properties
  35  * of resources.
  36  *
  37  * <p>
  38  * The viewpoint generates {@link ResourceArrayProperty} output for Value instances that contain array values.
  39  * </p>
  40  *
  41  * @see ArrayPropertyValueViewpointFactory viewpoint with IArrayProperty support
  42  */
  43 public class PropertyViewpointFactory implements ViewpointFactory {
  44     @Override
  45     public Viewpoint create(PrimitiveQueryUpdater provider, final NodeContext context, ViewpointKey key) {
  46         return new LazyViewpoint(provider, context, key) {
  47             @Override
  48             public NodeContext[] children(ReadGraph graph) throws DatabaseException {
  49                 Object in = getInput(Object.class);
  50                 Resource input = null;
  51                 if (in instanceof Resource) {
  52                     input = (Resource) in;
  53                 } else if (in instanceof ResourceArray) {
  54                     ResourceArray ra = (ResourceArray) in;
  55                     if (ra.isEmpty())
  56                         return NodeContext.NONE;
  57                     input = ra.resources[0];
  58                 } else if (in instanceof Statement) {
  59                     input = ((Statement) in).getObject();
  60                 } else {
  61                     return NodeContext.NONE;
  62                 }
  63
  64 //                // First see if this is a Value resource.
  65 //                NodeContext[] valueChildren = GraphPropertyUtil.tryValueGetChildren(graph, input, new ResourcePropertyFactory(IProperty.Type.DIRECT, input));
  66 //                if (valueChildren != null)
  67 //                    return valueChildren;
  68
  69                 // If not, then go look for properties, either direct or asserted.
  70                 Collection<Object> properties = new ArrayList<Object>();
  71                 Set<Object> usedProperties = new HashSet<Object>();
  72                 Layer0 L0 = Layer0.getInstance(graph);
  73                 for (Resource predicate : graph.getPredicates(input)) {
  74                     if (!graph.isSubrelationOf(predicate, L0.IsRelatedTo))
  75                         continue;
  76
  77                     for (Statement stm : graph.getStatements(input, predicate)) {
  78                         Resource object = stm.getObject();
  79                         //System.out.println("STM: " + NameUtils.toString(graph, stm));
  80                         if (usedProperties.add(stm.getPredicate())) {
  81                             if (
  82                                     // [TLe] Added to keep data that can't be
  83                                     // visualized anyway out of the basic property view.
  84                                     graph.isInstanceOf(stm.getObject(), L0.Literal)
  85                                     && (
  86                                            graph.isSubrelationOf(stm.getPredicate(), L0.HasProperty)
  87                                            || graph.syncRequest(new IsEnumeratedValue(object))
  88                                            )
  89                                     )
  90                             {
  91                                 IProperty.Type type = stm.getSubject().equals(input) ? IProperty.Type.DIRECT : IProperty.Type.ASSERTED;
  92                                 //System.out.println("\tTYPE: " + type);
  93                                 IProperty prop = GraphPropertyUtil.tryCreateProperty(graph, object, new ResourcePropertyFactory(type, input, stm.getPredicate(), object, ResourceArray.EMPTY));
  94                                 //System.out.println("\tPROP: " + prop);
  95                                 if (prop != null)
  96                                     properties.add(prop);
  97                                 else
  98                                     properties.add(new RelationContextImpl(input, stm));
  99                             }
 100                         }
 101                     }
 102                 }
 103
 104                 return toContextsWithInput(properties);
 105             }
 106
 107             @Override
 108             public Boolean hasChildren(ReadGraph graph) throws DatabaseException {
 109                 return children(graph).length > 0;
 110             }
 111         };
 112     }
 113
 114     @Override
 115     public String toString() {
 116         return "Properties";
 117     }
 118
 119 }