]> gerrit.simantics Code Review - simantics/platform.git/blob - bundles/org.simantics.browsing.ui.graph.impl/src/org/simantics/browsing/ui/graph/impl/request/GetLabel.java
Fixed all line endings of the repository
[simantics/platform.git] / bundles / org.simantics.browsing.ui.graph.impl / src / org / simantics / browsing / ui / graph / impl / request / GetLabel.java
1 /*******************************************************************************
2  * Copyright (c) 2007, 2010 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.graph.impl.request;
13
14 import org.simantics.databoard.Bindings;
15 import org.simantics.db.ReadGraph;
16 import org.simantics.db.Resource;
17 import org.simantics.db.common.request.ResourceRead;
18 import org.simantics.db.common.utils.NameUtils;
19 import org.simantics.db.exception.DatabaseException;
20 import org.simantics.db.exception.ValidationException;
21 import org.simantics.layer0.Layer0;
22
23 /**
24  * @author Tuukka Lehtonen
25  */
26 public class GetLabel extends ResourceRead<String> {
27
28     public GetLabel(Resource r) {
29         super(r);
30     }
31
32     @Override
33     public String perform(ReadGraph graph) throws DatabaseException {
34         Layer0 l0 = Layer0.getInstance(graph);
35         String label = graph.getPossibleRelatedValue(resource, l0.HasLabel, Bindings.STRING);
36         if (label == null)
37             label = graph.getPossibleRelatedValue(resource, l0.HasName, Bindings.STRING);
38         if (label == null) {
39             String rep = NameUtils.getSafeName(graph, resource);
40             throw new ValidationException("Resource '" + rep + "' does not have a Label or a Name property.");
41         }
42         return label;
43     }
44
45 }