Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.db.common / src / org / simantics / db / common / request / UnaryParametrizedRead.java

diff --git a/bundles/org.simantics.db.common/src/org/simantics/db/common/request/UnaryParametrizedRead.java b/bundles/org.simantics.db.common/src/org/simantics/db/common/request/UnaryParametrizedRead.java
new file mode 100644 (file)
index 0000000..0357067
--- /dev/null
+++ b/bundles/org.simantics.db.common/src/org/simantics/db/common/request/UnaryParametrizedRead.java
@@ -0,0 +1,40 @@
+/*******************************************************************************\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