Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.db.common / src / org / simantics / db / common / procedure / adapter / TransientCacheListener.java

diff --git a/bundles/org.simantics.db.common/src/org/simantics/db/common/procedure/adapter/TransientCacheListener.java b/bundles/org.simantics.db.common/src/org/simantics/db/common/procedure/adapter/TransientCacheListener.java
new file mode 100644 (file)
index 0000000..c3fad9a
--- /dev/null
+++ b/bundles/org.simantics.db.common/src/org/simantics/db/common/procedure/adapter/TransientCacheListener.java
@@ -0,0 +1,53 @@
+/*******************************************************************************\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.procedure.adapter;\r
+\r
+import org.simantics.db.procedure.Listener;\r
+\r
+/*\r
+ * Use this listener to ensure caching for a request. This listener will not lock the request in cache.\r
+ * \r
+ */\r
+public class TransientCacheListener<T> implements Listener<T> {\r
+\r
+    @SuppressWarnings("rawtypes")\r
+    private static TransientCacheListener INSTANCE = new TransientCacheListener();\r
+\r
+    @SuppressWarnings("unchecked")\r
+    public static <T> TransientCacheListener<T> instance() {\r
+        return (TransientCacheListener<T>) INSTANCE;\r
+    }\r
+\r
+    @Override\r
+    public final boolean isDisposed() {\r
+        return true;\r
+    }\r
+\r
+    @Override\r
+    public int hashCode() {\r
+        return TransientCacheListener.class.hashCode();\r
+    }\r
+\r
+    @Override\r
+    public boolean equals(Object other) {\r
+        return other instanceof TransientCacheListener<?>;\r
+    }\r
+\r
+    @Override\r
+    public void execute(T result) {\r
+    }\r
+\r
+    @Override\r
+    public void exception(Throwable t) {\r
+    }\r
+\r
+}
\ No newline at end of file