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

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2012 Association for Decentralized Information Management
   3  * in 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.browsing.ui.swt;
  13
  14 import java.util.ArrayList;
  15 import java.util.Collection;
  16
  17 import org.simantics.browsing.ui.BuiltinKeys;
  18 import org.simantics.browsing.ui.BuiltinKeys.ViewpointKey;
  19 import org.simantics.browsing.ui.NodeContext;
  20 import org.simantics.browsing.ui.PrimitiveQueryUpdater;
  21 import org.simantics.browsing.ui.common.NodeContextBuilder;
  22 import org.simantics.browsing.ui.content.Viewpoint;
  23 import org.simantics.browsing.ui.content.ViewpointFactory;
  24 import org.simantics.browsing.ui.graph.impl.LazyViewpoint;
  25 import org.simantics.db.ReadGraph;
  26 import org.simantics.db.Resource;
  27 import org.simantics.db.common.ResourceArray;
  28 import org.simantics.db.exception.DatabaseException;
  29 import org.simantics.layer0.Layer0;
  30 import org.simantics.ui.utils.ResourceAdaptionUtils;
  31
  32 public class ValuePropertyViewpointFactory implements ViewpointFactory {
  33
  34     @Override
  35     public Viewpoint create(PrimitiveQueryUpdater provider, final NodeContext context, ViewpointKey key) {
  36         assert(provider != null);
  37         assert(context != null);
  38
  39         return new LazyViewpoint(provider, context, key) {
  40             @Override
  41             public NodeContext[] children(ReadGraph graph) throws DatabaseException {
  42                 Layer0 L0 = Layer0.getInstance(graph);
  43                 ResourceArray ra = ResourceAdaptionUtils.toSingleResourceArray(context.getConstant(BuiltinKeys.INPUT));
  44                 Collection<Resource> children = graph.getObjects(ra.resources[0], L0.HasProperty);
  45
  46                 ArrayList<NodeContext> resultContexts = new ArrayList<NodeContext>();
  47                 for (Resource child : children) {
  48                     if (graph.isInstanceOf(child, L0.Literal)) {
  49                         resultContexts.add(NodeContextBuilder.buildWithInput(child));
  50                     }
  51                 }
  52
  53                 return resultContexts.toArray(new NodeContext[resultContexts.size()]);
  54             }
  55
  56             @Override
  57             public Boolean hasChildren(ReadGraph graph) throws DatabaseException {
  58                 return children(graph).length > 0;
  59             }
  60         };
  61     }
  62
  63     @Override
  64     public String toString() {
  65         return "Scalar values";
  66     }
  67
  68 }