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[simantics/platform.git] / bundles / org.simantics.browsing.ui.common / src / org / simantics / browsing / ui / common / processors / DefaultSelectedLabelerProcessor.java
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
8  *\r
9  * Contributors:\r
10  *     VTT Technical Research Centre of Finland - initial API and implementation\r
11  *******************************************************************************/\r
12 package org.simantics.browsing.ui.common.processors;\r
13 \r
14 import java.util.Collection;\r
15 \r
16 import org.simantics.browsing.ui.BuiltinKeys;\r
17 import org.simantics.browsing.ui.NodeContext;\r
18 import org.simantics.browsing.ui.NodeQueryManager;\r
19 import org.simantics.browsing.ui.NodeContext.QueryKey;\r
20 import org.simantics.browsing.ui.common.labelers.ToStringLabeler;\r
21 import org.simantics.browsing.ui.content.Labeler;\r
22 import org.simantics.browsing.ui.content.LabelerFactory;\r
23 \r
24 public class DefaultSelectedLabelerProcessor extends AbstractNodeQueryProcessor<Labeler> {\r
25 \r
26     @Override\r
27     public QueryKey<Labeler> getIdentifier() {\r
28         return BuiltinKeys.SELECTED_LABELER;\r
29     }\r
30 \r
31     @Override\r
32     public Labeler query(NodeQueryManager manager, NodeContext context) {\r
33         \r
34         Collection<LabelerFactory> labelers = manager.query(context, BuiltinKeys.LABELER_FACTORIES);\r
35         if(labelers.isEmpty())\r
36             return new ToStringLabeler(context);\r
37 \r
38         // TODO: use SelectedLabelerFactory query instead of this educated choice\r
39         LabelerFactory factory = labelers.iterator().next();\r
40 \r
41         return manager.query(context, new BuiltinKeys.LabelerKey(factory));\r
42         \r
43     }\r
44 \r
45     @Override\r
46     public String toString() {\r
47         return "SelectedLabelerProcessor";\r
48     }\r
49 \r
50 }