bundles/org.simantics.browsing.ui.swt/src/org/simantics/browsing/ui/swt/ValuePropertyViewpointFactory.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.ArrayList;\r
  15 import java.util.Collection;\r
  16 \r
  17 import org.simantics.browsing.ui.BuiltinKeys;\r
  18 import org.simantics.browsing.ui.BuiltinKeys.ViewpointKey;\r
  19 import org.simantics.browsing.ui.NodeContext;\r
  20 import org.simantics.browsing.ui.PrimitiveQueryUpdater;\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.browsing.ui.graph.impl.LazyViewpoint;\r
  25 import org.simantics.db.ReadGraph;\r
  26 import org.simantics.db.Resource;\r
  27 import org.simantics.db.common.ResourceArray;\r
  28 import org.simantics.db.exception.DatabaseException;\r
  29 import org.simantics.layer0.Layer0;\r
  30 import org.simantics.ui.utils.ResourceAdaptionUtils;\r
  31 \r
  32 public class ValuePropertyViewpointFactory implements ViewpointFactory {\r
  33 \r
  34     @Override\r
  35     public Viewpoint create(PrimitiveQueryUpdater provider, final NodeContext context, ViewpointKey key) {\r
  36         assert(provider != null);\r
  37         assert(context != null);\r
  38 \r
  39         return new LazyViewpoint(provider, context, key) {\r
  40             @Override\r
  41             public NodeContext[] children(ReadGraph graph) throws DatabaseException {\r
  42                 Layer0 L0 = Layer0.getInstance(graph);\r
  43                 ResourceArray ra = ResourceAdaptionUtils.toSingleResourceArray(context.getConstant(BuiltinKeys.INPUT));\r
  44                 Collection<Resource> children = graph.getObjects(ra.resources[0], L0.HasProperty);\r
  45 \r
  46                 ArrayList<NodeContext> resultContexts = new ArrayList<NodeContext>();\r
  47                 for (Resource child : children) {\r
  48                     if (graph.isInstanceOf(child, L0.Literal)) {\r
  49                         resultContexts.add(NodeContextBuilder.buildWithInput(child));\r
  50                     }\r
  51                 }\r
  52 \r
  53                 return resultContexts.toArray(new NodeContext[resultContexts.size()]);\r
  54             }\r
  55 \r
  56             @Override\r
  57             public Boolean hasChildren(ReadGraph graph) throws DatabaseException {\r
  58                 return children(graph).length > 0;\r
  59             }\r
  60         };\r
  61     }\r
  62 \r
  63     @Override\r
  64     public String toString() {\r
  65         return "Scalar values";\r
  66     }\r
  67 \r
  68 }\r