bundles/org.simantics.browsing.ui.graph.impl/src/org/simantics/browsing/ui/graph/impl/ConsistsOfViewpointFactory.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 org.simantics.browsing.ui.BuiltinKeys;\r
  15 import org.simantics.browsing.ui.BuiltinKeys.ViewpointKey;\r
  16 import org.simantics.browsing.ui.NodeContext;\r
  17 import org.simantics.browsing.ui.PrimitiveQueryUpdater;\r
  18 import org.simantics.browsing.ui.content.Viewpoint;\r
  19 import org.simantics.browsing.ui.content.ViewpointFactory;\r
  20 import org.simantics.db.ReadGraph;\r
  21 import org.simantics.db.Resource;\r
  22 import org.simantics.db.exception.DatabaseException;\r
  23 import org.simantics.layer0.Layer0;\r
  24 \r
  25 public class ConsistsOfViewpointFactory implements ViewpointFactory {\r
  26 \r
  27     @Override\r
  28     public Viewpoint create(PrimitiveQueryUpdater updater, final NodeContext context, ViewpointKey key) {\r
  29         assert(updater != null);\r
  30         assert(context != null);\r
  31 \r
  32         return new LazyViewpoint(updater, context, key) {\r
  33             @Override\r
  34             public NodeContext[] children(ReadGraph graph) throws DatabaseException {\r
  35                 Layer0 L0 = Layer0.getInstance(graph);\r
  36                 return toContextsWithInput(graph.getObjects((Resource) context.getConstant(BuiltinKeys.INPUT), L0.ConsistsOf));\r
  37             }\r
  38 \r
  39             @Override\r
  40             public Boolean hasChildren(ReadGraph graph) throws DatabaseException {\r
  41                 return Boolean.valueOf(children(graph).length > 0);\r
  42             }\r
  43         };\r
  44     }\r
  45 \r
  46     @Override\r
  47     public String toString() {\r
  48         return "Structure";\r
  49     }\r
  50 \r
  51 }\r