]> gerrit.simantics Code Review - simantics/platform.git/blob - bundles/org.simantics.browsing.ui.swt/src/org/simantics/browsing/ui/swt/widgets/StringPropertyFactory.java
Merge "Font property for DIA.TextElement"
[simantics/platform.git] / bundles / org.simantics.browsing.ui.swt / src / org / simantics / browsing / ui / swt / widgets / StringPropertyFactory.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.widgets;
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 Antti Villberg
22  */
23 public class StringPropertyFactory extends ReadFactoryImpl<Resource, String> {
24
25     private final String propertyURI;
26     private final String defaultValue;
27
28     public StringPropertyFactory(String propertyURI) {
29         this(propertyURI, null);
30     }
31
32     public StringPropertyFactory(String propertyURI, String defaultValue) {
33         this.propertyURI = propertyURI;
34         this.defaultValue = defaultValue;
35     }
36
37     @Override
38     public Object getIdentity(Object inputContents) {
39         return new Triple<Resource, String, Object>((Resource) inputContents, propertyURI, getClass());
40     }
41
42     @Override
43     public String perform(ReadGraph graph, Resource resource) throws DatabaseException {
44         String value = graph.getPossibleRelatedValue(resource, graph.getResource(propertyURI));
45         return value != null ? value : defaultValue;
46     }
47
48 }