1 /*******************************************************************************
2 * Copyright (c) 2010, 2011 Association for Decentralized Information Management in
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
10 * VTT Technical Research Centre of Finland - initial API and implementation
11 *******************************************************************************/
12 package org.simantics.browsing.ui.model.labels;
14 import java.util.Collections;
17 import org.simantics.browsing.ui.BuiltinKeys;
18 import org.simantics.browsing.ui.NodeContext;
19 import org.simantics.browsing.ui.common.ColumnKeys;
20 import org.simantics.browsing.ui.common.ErrorLogger;
21 import org.simantics.browsing.ui.model.InvalidContribution;
22 import org.simantics.browsing.ui.model.nodetypes.NodeType;
23 import org.simantics.browsing.ui.model.tests.Test;
24 import org.simantics.browsing.ui.model.visuals.VisualsContribution;
25 import org.simantics.db.ReadGraph;
26 import org.simantics.db.exception.DatabaseException;
27 import org.simantics.db.layer0.exception.PendingVariableException;
30 * Produces labels for nodes of given node type.
31 * @author Hannu Niemistö
33 public class LabelContribution extends VisualsContribution {
36 public LabelContribution(NodeType nodeType, Test test, LabelRule labelRule, double priority) throws InvalidContribution {
37 super(nodeType, test, priority);
38 if(!labelRule.isCompatible(
39 nodeType.getContentType()
41 throw new InvalidContribution("Label rule is not compatible with the content type.");
42 this.labelRule = labelRule;
46 * Returns a label for the node or null, if contribution is
47 * not suitable for the input.
49 public Map<String, String> getLabel(ReadGraph graph, NodeContext context) {
50 Object content = context.getConstant(BuiltinKeys.INPUT);
52 if(test == null || test.test(graph, content))
53 return labelRule.getLabel(graph, content);
56 } catch(PendingVariableException e) {
57 return Collections.singletonMap(ColumnKeys.SINGLE, "");
58 } catch(DatabaseException e) {
59 ErrorLogger.defaultLogError(e);
60 return Collections.singletonMap(ColumnKeys.SINGLE, "");