bundles/org.simantics.browsing.ui.graph.impl/src/org/simantics/browsing/ui/graph/impl/PropertyViewpointFactory.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
   3  * in 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.browsing.ui.graph.impl;\r
  13 \r
  14 import java.util.ArrayList;\r
  15 import java.util.Collection;\r
  16 import java.util.HashSet;\r
  17 import java.util.Set;\r
  18 \r
  19 import org.simantics.browsing.ui.BuiltinKeys.ViewpointKey;\r
  20 import org.simantics.browsing.ui.NodeContext;\r
  21 import org.simantics.browsing.ui.PrimitiveQueryUpdater;\r
  22 import org.simantics.browsing.ui.common.property.IProperty;\r
  23 import org.simantics.browsing.ui.content.Viewpoint;\r
  24 import org.simantics.browsing.ui.content.ViewpointFactory;\r
  25 import org.simantics.db.ReadGraph;\r
  26 import org.simantics.db.Resource;\r
  27 import org.simantics.db.Statement;\r
  28 import org.simantics.db.common.ResourceArray;\r
  29 import org.simantics.db.exception.DatabaseException;\r
  30 import org.simantics.db.impl.RelationContextImpl;\r
  31 import org.simantics.layer0.Layer0;\r
  32 \r
  33 /**\r
  34  * A basic viewpoint which follows the Has Property relation to show properties\r
  35  * of resources.\r
  36  * \r
  37  * <p>\r
  38  * The viewpoint generates {@link ResourceArrayProperty} output for Value instances that contain array values.\r
  39  * </p>\r
  40  * \r
  41  * @see ArrayPropertyValueViewpointFactory viewpoint with IArrayProperty support\r
  42  */\r
  43 public class PropertyViewpointFactory implements ViewpointFactory {\r
  44     @Override\r
  45     public Viewpoint create(PrimitiveQueryUpdater provider, final NodeContext context, ViewpointKey key) {\r
  46         return new LazyViewpoint(provider, context, key) {\r
  47             @Override\r
  48             public NodeContext[] children(ReadGraph graph) throws DatabaseException {\r
  49                 Object in = getInput(Object.class);\r
  50                 Resource input = null;\r
  51                 if (in instanceof Resource) {\r
  52                     input = (Resource) in;\r
  53                 } else if (in instanceof ResourceArray) {\r
  54                     ResourceArray ra = (ResourceArray) in;\r
  55                     if (ra.isEmpty())\r
  56                         return NodeContext.NONE;\r
  57                     input = ra.resources[0];\r
  58                 } else if (in instanceof Statement) {\r
  59                     input = ((Statement) in).getObject();\r
  60                 } else {\r
  61                     return NodeContext.NONE;\r
  62                 }\r
  63 \r
  64 //                // First see if this is a Value resource.\r
  65 //                NodeContext[] valueChildren = GraphPropertyUtil.tryValueGetChildren(graph, input, new ResourcePropertyFactory(IProperty.Type.DIRECT, input));\r
  66 //                if (valueChildren != null)\r
  67 //                    return valueChildren;\r
  68 \r
  69                 // If not, then go look for properties, either direct or asserted.\r
  70                 Collection<Object> properties = new ArrayList<Object>();\r
  71                 Set<Object> usedProperties = new HashSet<Object>();\r
  72                 Layer0 L0 = Layer0.getInstance(graph);\r
  73                 for (Resource predicate : graph.getPredicates(input)) {\r
  74                     if (!graph.isSubrelationOf(predicate, L0.IsRelatedTo))\r
  75                         continue;\r
  76 \r
  77                     for (Statement stm : graph.getStatements(input, predicate)) {\r
  78                         Resource object = stm.getObject();\r
  79                         //System.out.println("STM: " + NameUtils.toString(graph, stm));\r
  80                         if (usedProperties.add(stm.getPredicate())) {\r
  81                             if (\r
  82                                     // [TLe] Added to keep data that can't be\r
  83                                     // visualized anyway out of the basic property view.\r
  84                                     graph.isInstanceOf(stm.getObject(), L0.Literal)\r
  85                                     && (\r
  86                                            graph.isSubrelationOf(stm.getPredicate(), L0.HasProperty)\r
  87                                            || graph.syncRequest(new IsEnumeratedValue(object))\r
  88                                            )\r
  89                                     )\r
  90                             {\r
  91                                 IProperty.Type type = stm.getSubject().equals(input) ? IProperty.Type.DIRECT : IProperty.Type.ASSERTED;\r
  92                                 //System.out.println("\tTYPE: " + type);\r
  93                                 IProperty prop = GraphPropertyUtil.tryCreateProperty(graph, object, new ResourcePropertyFactory(type, input, stm.getPredicate(), object, ResourceArray.EMPTY));\r
  94                                 //System.out.println("\tPROP: " + prop);\r
  95                                 if (prop != null)\r
  96                                     properties.add(prop);\r
  97                                 else\r
  98                                     properties.add(new RelationContextImpl(input, stm));\r
  99                             }\r
 100                         }\r
 101                     }\r
 102                 }\r
 103 \r
 104                 return toContextsWithInput(properties);\r
 105             }\r
 106 \r
 107             @Override\r
 108             public Boolean hasChildren(ReadGraph graph) throws DatabaseException {\r
 109                 return children(graph).length > 0;\r
 110             }\r
 111         };\r
 112     }\r
 113 \r
 114     @Override\r
 115     public String toString() {\r
 116         return "Properties";\r
 117     }\r
 118 \r
 119 }\r