--- /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.common.request;\r
+\r
+import org.simantics.db.ReadGraph;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.db.request.Read;\r
+\r
+public abstract class UnaryParametrizedRead<P, C, R> implements ParametrizedRead<P, R> {\r
+\r
+ final protected C constant;\r
+ \r
+ public UnaryParametrizedRead(C constant) {\r
+ this.constant = constant;\r
+ }\r
+ \r
+ abstract public R perform(ReadGraph graph, P parameter) throws DatabaseException;\r
+ \r
+ @Override\r
+ public Read<R> get(P parameter) {\r
+ return new BinaryRead<P, C, R>(parameter, constant) {\r
+\r
+ @Override\r
+ public R perform(ReadGraph graph) throws DatabaseException {\r
+ return UnaryParametrizedRead.this.perform(graph, parameter);\r
+ }\r
+ \r
+ };\r
+ }\r
+ \r
+}\r