Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.db.layer0 / src / org / simantics / db / layer0 / genericrelation / combinators / Complement.java

diff --git a/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/genericrelation/combinators/Complement.java b/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/genericrelation/combinators/Complement.java
new file mode 100644 (file)
index 0000000..ae964f7
--- /dev/null
+++ b/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/genericrelation/combinators/Complement.java
@@ -0,0 +1,46 @@
+/*******************************************************************************\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.genericrelation.combinators;\r
+\r
+import org.simantics.db.ReadGraph;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.db.layer0.adapter.GenericRelation;\r
+import org.simantics.db.layer0.genericrelation.AbstractRelation;\r
+import org.simantics.utils.datastructures.Pair;\r
+\r
+/**\r
+ * Takes the complement of a relation;\r
+ */\r
+public class Complement extends AbstractRelation {\r
+\r
+       GenericRelation base;\r
+       \r
+       public Complement(GenericRelation base) {\r
+               this.base = base;\r
+       }\r
+\r
+       @Override\r
+       public boolean contains(ReadGraph g, Object[] tuple) throws DatabaseException {\r
+               return !base.contains(g, tuple);\r
+       }\r
+       \r
+       @Override\r
+       public GenericRelation select(String bindingPattern, Object[] constants) {\r
+               return new Complement(base.select(bindingPattern, constants));\r
+       }\r
+\r
+       @Override\r
+       public Pair<String, String>[] getFields() {\r
+               return base.getFields();\r
+       }\r
+\r
+}\r