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[simantics/platform.git] / bundles / org.simantics.db.common / src / org / simantics / db / common / request / ObjectsWithSupertype.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.db.common.request;\r
13 \r
14 import java.util.HashSet;\r
15 import java.util.Set;\r
16 \r
17 import org.simantics.db.ReadGraph;\r
18 import org.simantics.db.Resource;\r
19 import org.simantics.db.exception.DatabaseException;\r
20 \r
21 final public class ObjectsWithSupertype extends ResourceRead3<Set<Resource>> {\r
22 \r
23     public ObjectsWithSupertype(Resource subject, Resource subrelationOf, Resource instanceOf) {\r
24         super(subject, subrelationOf, instanceOf);\r
25     }\r
26 \r
27     @Override\r
28     public Set<Resource> perform(ReadGraph graph) throws DatabaseException {\r
29         \r
30         Set<Resource> result = new HashSet<Resource>();\r
31         for(Resource object : graph.getObjects(resource, resource2)) {\r
32                 if(graph.isInheritedFrom(object, resource3)) result.add(object);\r
33         }\r
34         return result;\r
35         \r
36     }\r
37 \r
38 }\r