Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.db.layer0 / src / org / simantics / db / layer0 / util / RelationUtils.java

diff --git a/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/util/RelationUtils.java b/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/util/RelationUtils.java
new file mode 100644 (file)
index 0000000..14aad56
--- /dev/null
+++ b/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/util/RelationUtils.java
@@ -0,0 +1,39 @@
+/*******************************************************************************\r
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
+ * in Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ *     VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+package org.simantics.db.layer0.util;\r
+\r
+import org.simantics.db.Resource;\r
+import org.simantics.db.WriteGraph;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.layer0.Layer0;\r
+\r
+/**\r
+ * TODO: is this useful? Doesn't seem to be used.\r
+ */\r
+public class RelationUtils {\r
+\r
+       public static Resource[] createRelation(WriteGraph g, String name, String inverseName, Resource baseRelation) throws DatabaseException {\r
+               Layer0 b = Layer0.getInstance(g);\r
+               Resource newRelation = g.newResource();\r
+               g.claim(newRelation, b.SubrelationOf, baseRelation);\r
+               if(name != null)\r
+                       g.claimLiteral(newRelation,b.HasName, name);\r
+               Resource newInverse = g.newResource();\r
+               g.claim(newInverse, b.SubrelationOf, g.getInverse(baseRelation));\r
+               g.claim(newRelation, b.InverseOf, newInverse);\r
+               if (inverseName != null)\r
+                       g.claimLiteral(newInverse, b.HasName,inverseName);\r
+\r
+               return new Resource[] {newRelation, newInverse};\r
+       }\r
+       \r
+}\r