1 /*******************************************************************************
2 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
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
10 * VTT Technical Research Centre of Finland - initial API and implementation
11 *******************************************************************************/
12 package org.simantics.browsing.ui.graph.impl;
14 import java.util.Collection;
16 import org.simantics.browsing.ui.NodeContext;
17 import org.simantics.browsing.ui.PrimitiveQueryUpdater;
18 import org.simantics.browsing.ui.BuiltinKeys.ViewpointKey;
19 import org.simantics.browsing.ui.content.Viewpoint;
20 import org.simantics.browsing.ui.content.ViewpointFactory;
21 import org.simantics.db.ReadGraph;
22 import org.simantics.db.Resource;
23 import org.simantics.db.exception.DatabaseException;
24 import org.simantics.layer0.Layer0;
26 public class InheritsViewpointFactory implements ViewpointFactory {
29 public Viewpoint create(final PrimitiveQueryUpdater updater, final NodeContext context, final ViewpointKey key) {
30 assert(updater != null);
31 assert(context != null);
32 return new LazyViewpoint(updater, context, key) {
34 public NodeContext[] children(ReadGraph graph) throws DatabaseException {
35 Layer0 L0 = Layer0.getInstance(graph);
36 Collection<Resource> children = graph.getObjects(getInput(Resource.class), L0.Inherits);
37 return toContextsWithInput(children);
40 public Boolean hasChildren(ReadGraph graph) throws DatabaseException {
41 Layer0 L0 = Layer0.getInstance(graph);
42 Collection<Resource> children = graph.getObjects(getInput(Resource.class), L0.Inherits);
43 return Boolean.valueOf(children.size() > 0);
49 public String toString() {