]> gerrit.simantics Code Review - simantics/platform.git/blob - bundles/org.simantics.db.common/src/org/simantics/db/common/request/PropertyType.java
Fixed multiple issues causing dangling references to discarded queries
[simantics/platform.git] / bundles / org.simantics.db.common / src / org / simantics / db / common / request / PropertyType.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.db.common.request;
13
14 import org.simantics.db.ReadGraph;
15 import org.simantics.db.Resource;
16 import org.simantics.db.exception.DatabaseException;
17 import org.simantics.layer0.Layer0;
18
19 public class PropertyType extends ResourceRead2<Resource> {
20
21         public PropertyType(Resource resource, Resource property) {
22                 super(resource, property);
23         }
24
25         @Override
26         public Resource perform(ReadGraph graph) throws DatabaseException {
27                 Layer0 l0 = Layer0.getInstance(graph);
28                 Resource value = graph.getPossibleObject(resource, resource2);
29                 if(value == null) return null;
30                 return graph.getPossibleType(value, l0.Literal);
31         }
32
33 }