]> gerrit.simantics Code Review - simantics/platform.git/blob - bundles/org.simantics.modeling.ui/src/org/simantics/modeling/ui/chart/property/DoublePropertyFactory.java
Contextual adapters must throw instead of returning null
[simantics/platform.git] / bundles / org.simantics.modeling.ui / src / org / simantics / modeling / ui / chart / property / DoublePropertyFactory.java
1 /*******************************************************************************
2  * Copyright (c) 2010, 2011 Association for Decentralized Information Management in
3  * 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.modeling.ui.chart.property;
13
14 import org.simantics.browsing.ui.swt.widgets.impl.ReadFactoryImpl;
15 import org.simantics.db.ReadGraph;
16 import org.simantics.db.Resource;
17 import org.simantics.db.exception.DatabaseException;
18 import org.simantics.utils.datastructures.Triple;
19
20 /**
21  * @author Tuukka Lehtonen
22  */
23 public class DoublePropertyFactory extends ReadFactoryImpl<Resource, String> {
24
25     final private String propertyURI;
26
27     public DoublePropertyFactory(String propertyURI) {
28         this.propertyURI = propertyURI;
29     }
30
31     @Override
32     public Object getIdentity(Object inputContents) {
33         return new Triple<Resource, String, Object>((Resource) inputContents, propertyURI, getClass());
34     }
35
36     @Override
37     public String perform(ReadGraph graph, Resource r) throws DatabaseException {
38         Double value = graph.getPossibleRelatedAdapter(r, graph.getResource(propertyURI), Double.class);
39         return value != null ? value.toString() : ""; //$NON-NLS-1$
40     }
41
42 }