bundles/org.simantics.browsing.ui.swt/src/org/simantics/browsing/ui/swt/StandardContextTypesQueryProcessor.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2012 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.swt;\r
  13 \r
  14 import java.util.Collections;\r
  15 import java.util.Set;\r
  16 \r
  17 import org.simantics.browsing.ui.NodeContext;\r
  18 import org.simantics.browsing.ui.NodeContext.PrimitiveQueryKey;\r
  19 import org.simantics.browsing.ui.common.node.StandardNodes;\r
  20 import org.simantics.browsing.ui.graph.impl.CommonKeys;\r
  21 import org.simantics.browsing.ui.graph.impl.LazyGraphQueryProcessor;\r
  22 import org.simantics.db.ReadGraph;\r
  23 import org.simantics.db.Resource;\r
  24 import org.simantics.db.exception.DatabaseException;\r
  25 import org.simantics.ui.utils.ResourceAdaptionUtils;\r
  26 import org.simantics.utils.Container;\r
  27 \r
  28 public class StandardContextTypesQueryProcessor extends LazyGraphQueryProcessor<Set<Resource>> {\r
  29 \r
  30     @Override\r
  31     public String toString() {\r
  32         return "Standard Context Types";\r
  33     }\r
  34 \r
  35     @Override\r
  36     public Object getIdentifier() {\r
  37         return CommonKeys.STANDARD_CONTEXT_TYPES;\r
  38     }\r
  39 \r
  40     @Override\r
  41     protected Set<Resource> initial() {\r
  42         return Collections.emptySet();\r
  43     }\r
  44 \r
  45     @Override\r
  46     protected Set<Resource> compute(ReadGraph graph, NodeContext context, PrimitiveQueryKey<Container<Set<Resource>>> key) throws DatabaseException {\r
  47         Object input = context.getConstant(StandardNodes.CONTEXT);\r
  48         Resource resource = ResourceAdaptionUtils.toSingleResource(input);\r
  49         if(resource != null) {\r
  50             return graph.getTypes(resource);\r
  51         } else {\r
  52             return Collections.emptySet();\r
  53         }\r
  54     }\r
  55 \r
  56 }\r