bundles/org.simantics.modeling.template2d.ui/src/org/simantics/modeling/template2d/ui/adapters/ScenegraphChildrenRule.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2013 Association for Decentralized Information Management in\r
   3  * 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.modeling.template2d.ui.adapters;\r
  13 \r
  14 import java.util.ArrayList;\r
  15 import java.util.Collection;\r
  16 import java.util.Collections;\r
  17 \r
  18 import org.simantics.browsing.ui.model.children.ChildRule;\r
  19 import org.simantics.db.ReadGraph;\r
  20 import org.simantics.db.Resource;\r
  21 import org.simantics.db.common.utils.ListUtils;\r
  22 import org.simantics.db.exception.DatabaseException;\r
  23 import org.simantics.layer0.Layer0;\r
  24 import org.simantics.scenegraph.ontology.ScenegraphResources;\r
  25 \r
  26 public class ScenegraphChildrenRule implements ChildRule {\r
  27 \r
  28         @Override\r
  29         public boolean isCompatible(Class<?> contentType) {\r
  30                 return contentType.equals(Resource.class);\r
  31         }\r
  32 \r
  33         @Override\r
  34         public Collection<?> getChildren(ReadGraph graph, Object parent)\r
  35                         throws DatabaseException {\r
  36 \r
  37                 Resource entry = (Resource)parent;\r
  38                 Layer0 L0 = Layer0.getInstance(graph);\r
  39                 ScenegraphResources SG = ScenegraphResources.getInstance(graph);\r
  40                 Resource list = graph.getPossibleObject(entry, SG.Node_children);\r
  41                 if(list != null) {\r
  42                         if(graph.isInstanceOf(list, L0.List)) return ListUtils.toList(graph, list);\r
  43                 }\r
  44                 return Collections.emptyList();\r
  45     }\r
  46 \r
  47         @Override\r
  48         public Collection<?> getParents(ReadGraph graph, Object child)\r
  49                         throws DatabaseException {\r
  50                 return new ArrayList<Resource>();\r
  51         }\r
  52 \r
  53 }\r