bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/util/RelationUtils.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.layer0.util;\r
  13 \r
  14 import org.simantics.db.Resource;\r
  15 import org.simantics.db.WriteGraph;\r
  16 import org.simantics.db.exception.DatabaseException;\r
  17 import org.simantics.layer0.Layer0;\r
  18 \r
  19 /**\r
  20  * TODO: is this useful? Doesn't seem to be used.\r
  21  */\r
  22 public class RelationUtils {\r
  23 \r
  24         public static Resource[] createRelation(WriteGraph g, String name, String inverseName, Resource baseRelation) throws DatabaseException {\r
  25                 Layer0 b = Layer0.getInstance(g);\r
  26                 Resource newRelation = g.newResource();\r
  27                 g.claim(newRelation, b.SubrelationOf, baseRelation);\r
  28                 if(name != null)\r
  29                         g.claimLiteral(newRelation,b.HasName, name);\r
  30                 Resource newInverse = g.newResource();\r
  31                 g.claim(newInverse, b.SubrelationOf, g.getInverse(baseRelation));\r
  32                 g.claim(newRelation, b.InverseOf, newInverse);\r
  33                 if (inverseName != null)\r
  34                         g.claimLiteral(newInverse, b.HasName,inverseName);\r
  35 \r
  36                 return new Resource[] {newRelation, newInverse};\r
  37         }\r
  38         \r
  39 }\r