Added resourceId and GUID to diagram DnD content
[simantics/platform.git] / bundles / org.simantics.db.layer0 / src / org / simantics / db / layer0 / request / PossibleGUID.java
1 /*******************************************************************************
2  * Copyright (c) 2007, 2018 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.db.layer0.request;
13
14 import org.simantics.datatypes.literal.GUID;
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.exception.DatabaseException;
19 import org.simantics.layer0.Layer0;
20
21 public class PossibleGUID extends ResourceRead<String> {
22
23     public PossibleGUID(Resource resource) {
24         super(resource);
25     }
26
27     @Override
28     public String perform(ReadGraph graph) throws DatabaseException {
29         Layer0 L0 = Layer0.getInstance(graph);
30         GUID guid = graph.getPossibleRelatedValue(resource, L0.identifier, GUID.BINDING);
31         return guid != null ? guid.indexString() : null;
32     }
33
34 }