bundles/org.simantics.browsing.ui.graph.impl/src/org/simantics/browsing/ui/graph/impl/MultiInputPropertyViewpointFactory.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 \r
  17 import org.simantics.browsing.ui.BuiltinKeys;\r
  18 import org.simantics.browsing.ui.NodeContext;\r
  19 import org.simantics.browsing.ui.PrimitiveQueryUpdater;\r
  20 import org.simantics.browsing.ui.BuiltinKeys.ViewpointKey;\r
  21 import org.simantics.browsing.ui.common.NodeContextBuilder;\r
  22 import org.simantics.browsing.ui.content.Viewpoint;\r
  23 import org.simantics.browsing.ui.content.ViewpointFactory;\r
  24 import org.simantics.db.ReadGraph;\r
  25 import org.simantics.db.Resource;\r
  26 import org.simantics.db.Statement;\r
  27 import org.simantics.db.exception.DatabaseException;\r
  28 import org.simantics.layer0.Layer0;\r
  29 \r
  30 /**\r
  31  * A first test version of a viewpoint that provides editing of the shared\r
  32  * properties of multiple input resources.\r
  33  */\r
  34 public class MultiInputPropertyViewpointFactory implements ViewpointFactory {\r
  35 \r
  36     @Override\r
  37     public Viewpoint create(PrimitiveQueryUpdater provider, final NodeContext context, ViewpointKey key) {\r
  38 \r
  39         assert(provider != null);\r
  40         assert(context != null);\r
  41 \r
  42         return new LazyViewpoint(provider, context, key) {\r
  43 \r
  44             @Override\r
  45             public NodeContext[] children(ReadGraph graph) throws DatabaseException {\r
  46                 Resource[] rs = (Resource[]) context.getConstant(BuiltinKeys.INPUT);\r
  47                 if(rs.length == 0) return new NodeContext[0];\r
  48                 if(rs.length == 1) return new NodeContext[0];\r
  49                 Resource r = rs[0];\r
  50                 Layer0 l0 = Layer0.getInstance(graph);\r
  51                 Resource type = graph.getSingleType(r, l0.Entity);\r
  52                 for(int i=1;i<rs.length;i++) {\r
  53                     Resource type2 = graph.getSingleType(rs[i], l0.Entity);\r
  54                     if(!type.equals(type2)) return new NodeContext[0];\r
  55                 }\r
  56 \r
  57                 Collection<Statement> children = graph.getStatements(r, l0.HasProperty);\r
  58 \r
  59                 ArrayList<NodeContext> resultContexts = new ArrayList<NodeContext>();\r
  60 \r
  61                 for(Statement child : children) {\r
  62 \r
  63                     ArrayList<Resource> objects = new ArrayList<Resource>();\r
  64 \r
  65                     objects.add(child.getObject());\r
  66 \r
  67                     boolean ok = true;\r
  68                     for(int i=1;i<rs.length;i++) {\r
  69                         Collection<Resource> objects2 = graph.getObjects(rs[1], child.getPredicate());\r
  70                         if(objects2.size() != 1) {\r
  71                             ok = false;\r
  72                             break;\r
  73                         }\r
  74                         objects.add(objects2.iterator().next());\r
  75                     }\r
  76                     if(ok) {\r
  77                         resultContexts.add(NodeContextBuilder.buildWithInput(new PropertyArray(child.getPredicate(), objects)));\r
  78                     }\r
  79 \r
  80                 }\r
  81 \r
  82                 return resultContexts.toArray(new NodeContext[resultContexts.size()]);\r
  83             }\r
  84 \r
  85             @Override\r
  86             public Boolean hasChildren(ReadGraph graph) throws DatabaseException {\r
  87                 return Boolean.valueOf(children(graph).length > 0);\r
  88             }\r
  89         };\r
  90     }\r
  91 \r
  92     @Override\r
  93     public String toString() {\r
  94         return "Properties";\r
  95     }\r
  96 \r
  97 }\r