Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.layer0.utils / src / org / simantics / layer0 / utils / predicates / SuperRelation.java

diff --git a/bundles/org.simantics.layer0.utils/src/org/simantics/layer0/utils/predicates/SuperRelation.java b/bundles/org.simantics.layer0.utils/src/org/simantics/layer0/utils/predicates/SuperRelation.java
new file mode 100644 (file)
index 0000000..0addae7
--- /dev/null
+++ b/bundles/org.simantics.layer0.utils/src/org/simantics/layer0/utils/predicates/SuperRelation.java
@@ -0,0 +1,101 @@
+/*******************************************************************************\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.layer0.utils.predicates;\r
+\r
+import java.util.Collection;\r
+\r
+import org.simantics.db.ReadGraph;\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
+public class SuperRelation extends UnaryPredicate {\r
+\r
+       Resource superrelation;\r
+\r
+       public SuperRelation(Resource superrelation) {\r
+               this.superrelation = superrelation;\r
+       }\r
+\r
+       @Override\r
+       public Collection<Resource> getResources(ReadGraph g) {\r
+               throw new UnsupportedOperationException();\r
+       }\r
+\r
+       @Override\r
+       public boolean has(ReadGraph g, Resource resource) throws DatabaseException {\r
+               return g.isSubrelationOf(resource, superrelation);\r
+       }\r
+\r
+       @Override\r
+       public boolean supportsUnboundedQuery() {\r
+               return false;\r
+       }\r
+\r
+       @Override\r
+       public void add(WriteGraph g, Resource r) throws DatabaseException {\r
+               if(!g.isSubrelationOf(r, superrelation)) {\r
+               Layer0 b = Layer0.getInstance(g);\r
+                       g.claim(r, b.SubrelationOf, superrelation);\r
+                       if(!g.hasStatement(r, b.InverseOf)) {\r
+                               Resource invR = g.newResource();\r
+                               g.claim(r, b.InverseOf, invR);\r
+                               g.claim(invR, b.SubrelationOf, g.getInverse(superrelation));\r
+                       }\r
+               }\r
+       }\r
+\r
+       @Override\r
+       public void remove(WriteGraph g, Resource r) throws DatabaseException {\r
+               // FIXME not implemented correctly\r
+       Layer0 b = Layer0.getInstance(g);\r
+               if(g.isSubrelationOf(r, superrelation))\r
+                       g.denyStatement(r, b.SubrelationOf, superrelation);\r
+       }\r
+\r
+       @Override\r
+       public boolean supportsAddition() {\r
+               return true;\r
+       }\r
+\r
+       @Override\r
+       public boolean supportsRemoval() {\r
+               return false;\r
+       }\r
+\r
+       @Override\r
+       public int hashCode() {\r
+               final int prime = 31;\r
+               int result = 1;\r
+               result = prime * result + ((superrelation == null) ? 0 : superrelation.hashCode());\r
+               return result;\r
+       }\r
+\r
+       @Override\r
+       public boolean equals(Object obj) {\r
+               if (this == obj)\r
+                       return true;\r
+               if (obj == null)\r
+                       return false;\r
+               if (getClass() != obj.getClass())\r
+                       return false;\r
+               SuperRelation other = (SuperRelation) obj;\r
+               if (superrelation == null) {\r
+                       if (other.superrelation != null)\r
+                               return false;\r
+               } else if (!superrelation.equals(other.superrelation))\r
+                       return false;\r
+               return true;\r
+       }\r
+       \r
+}\r