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

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