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
10 * VTT Technical Research Centre of Finland - initial API and implementation
\r
11 *******************************************************************************/
\r
12 package org.simantics.browsing.ui.graph.impl;
\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
25 public class ConsistsOfViewpointFactory implements ViewpointFactory {
\r
28 public Viewpoint create(PrimitiveQueryUpdater updater, final NodeContext context, ViewpointKey key) {
\r
29 assert(updater != null);
\r
30 assert(context != null);
\r
32 return new LazyViewpoint(updater, context, key) {
\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
40 public Boolean hasChildren(ReadGraph graph) throws DatabaseException {
\r
41 return Boolean.valueOf(children(graph).length > 0);
\r
47 public String toString() {
\r