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[simantics/platform.git] / bundles / org.simantics.structural2 / src / org / simantics / structural2 / internal / queries / RelatedConnectionsOfConnectionJoin.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.structural2.internal.queries;\r
13 \r
14 import java.util.Collection;\r
15 import java.util.Collections;\r
16 import java.util.Set;\r
17 \r
18 import org.simantics.db.ReadGraph;\r
19 import org.simantics.db.Resource;\r
20 import org.simantics.db.common.request.BinaryRead;\r
21 import org.simantics.db.exception.DatabaseException;\r
22 import org.simantics.structural2.queries.ConnectionSet;\r
23 \r
24 /**\r
25  * Returns all connections that are reachable from the given ConnectionJoin\r
26  * excluding the provided excluded connections\r
27  * \r
28  * @author Hannu Niemistö\r
29  */\r
30 public class RelatedConnectionsOfConnectionJoin extends BinaryRead<Resource, Collection<Resource>, Set<Resource>>{\r
31 \r
32     public RelatedConnectionsOfConnectionJoin(Resource join) {\r
33         super(join, Collections.<Resource>emptySet());\r
34     }\r
35 \r
36     public RelatedConnectionsOfConnectionJoin(Resource join, Collection<Resource> excludedConnections) {\r
37         super(join, excludedConnections);\r
38     }\r
39 \r
40     @Override\r
41     public Set<Resource> perform(ReadGraph g) throws DatabaseException {\r
42         ConnectionSet connectionSet = new ConnectionSet(g);\r
43         connectionSet.excludeConnections(parameter2);\r
44         connectionSet.addJoin(g, parameter);\r
45         return connectionSet.getConnections();\r
46     }\r
47 \r
48 }\r