--- /dev/null
+/*******************************************************************************\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;\r
+\r
+import java.util.List;\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.combinators.SelectByRelation;\r
+import org.simantics.db.layer0.genericrelation.combinators.Selection;\r
+\r
+/**\r
+ * Default implementation for some methods of IRelation interface.\r
+ */\r
+public abstract class AbstractRelation implements GenericRelation {\r
+\r
+ @Override\r
+ public boolean isRealizable() {\r
+ return false;\r
+ }\r
+\r
+ @Override\r
+ public List<Object[]> realize(ReadGraph g) throws DatabaseException {\r
+ throw new UnsupportedOperationException();\r
+ }\r
+\r
+ @Override\r
+ public GenericRelation select(String bindingPattern, Object[] constants) {\r
+ return new Selection(this, bindingPattern, constants);\r
+ }\r
+ \r
+ @Override\r
+ public GenericRelation selectByRelation(String bindingPattern, GenericRelation constraint) {\r
+ return new SelectByRelation(this, bindingPattern, constraint);\r
+ }\r
+\r
+}\r