Adding JMCR-Stable version

[Benchmarks_CSolver.git] / JMCR-Stable / real-world application / MyDerby-10.3 / java / engine / org / apache / derby / impl / sql / execute / MiscResultSet.java

diff --git a/JMCR-Stable/real-world application/MyDerby-10.3/java/engine/org/apache/derby/impl/sql/execute/MiscResultSet.java b/JMCR-Stable/real-world application/MyDerby-10.3/java/engine/org/apache/derby/impl/sql/execute/MiscResultSet.java
new file mode 100644 (file)
index 0000000..3adfe07
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+++ b/JMCR-Stable/real-world application/MyDerby-10.3/java/engine/org/apache/derby/impl/sql/execute/MiscResultSet.java
@@ -0,0 +1,78 @@
+/*\r
+\r
+   Derby - Class org.apache.derby.impl.sql.execute.MiscResultSet\r
+\r
+   Licensed to the Apache Software Foundation (ASF) under one or more\r
+   contributor license agreements.  See the NOTICE file distributed with\r
+   this work for additional information regarding copyright ownership.\r
+   The ASF licenses this file to you under the Apache License, Version 2.0\r
+   (the "License"); you may not use this file except in compliance with\r
+   the License.  You may obtain a copy of the License at\r
+\r
+      http://www.apache.org/licenses/LICENSE-2.0\r
+\r
+   Unless required by applicable law or agreed to in writing, software\r
+   distributed under the License is distributed on an "AS IS" BASIS,\r
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\r
+   See the License for the specific language governing permissions and\r
+   limitations under the License.\r
+\r
+ */\r
+\r
+package org.apache.derby.impl.sql.execute;\r
+\r
+import org.apache.derby.iapi.error.StandardException;\r
+import org.apache.derby.iapi.sql.Activation;\r
+\r
+\r
+/**\r
+ * This is a wrapper class which invokes the Execution-time logic for\r
+ * Misc statements. The real Execution-time logic lives inside the\r
+ * executeConstantAction() method. Note that when re-using the\r
+ * language result set tree across executions (DERBY-827) it is not\r
+ * possible to store the ConstantAction as a member variable, because\r
+ * a re-prepare of the statement will invalidate the stored\r
+ * ConstantAction. Re-preparing a statement does not create a new\r
+ * Activation unless the GeneratedClass has changed, so the existing\r
+ * result set tree may survive a re-prepare.\r
+ */\r
+\r
+class MiscResultSet extends NoRowsResultSetImpl\r
+{\r
+       /**\r
+     * Construct a MiscResultSet\r
+        *\r
+        *  @param activation           Describes run-time environment.\r
+        *\r
+        *  @exception StandardException Standard Derby error policy.\r
+     */\r
+    MiscResultSet(Activation activation)\r
+                throws StandardException\r
+    {\r
+               super(activation);\r
+       }\r
+    \r
+       /**\r
+        * Opens a MiscResultSet, executes the Activation's\r
+        * ConstantAction, and then immediately closes the MiscResultSet.\r
+        *\r
+        * @exception StandardException Standard Derby error policy.\r
+        */\r
+       public void open() throws StandardException\r
+       {\r
+               setup();\r
+               activation.getConstantAction().executeConstantAction(activation);\r
+               super.close();\r
+       }\r
+\r
+       // Does not override close() (no action required)\r
+       // Does not override finish() (no action required)\r
+\r
+       /**\r
+        * No action is required, but not implemented in any base class\r
+        * @see org.apache.derby.iapi.sql.ResultSet#cleanUp\r
+        */\r
+       public void     cleanUp() \r
+       {\r
+       }\r
+}\r