Adding JMCR-Stable version

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

diff --git a/JMCR-Stable/real-world application/MyDerby-10.3/java/engine/org/apache/derby/impl/sql/compile/HasCorrelatedCRsVisitor.java b/JMCR-Stable/real-world application/MyDerby-10.3/java/engine/org/apache/derby/impl/sql/compile/HasCorrelatedCRsVisitor.java
new file mode 100644 (file)
index 0000000..6e5c969
--- /dev/null
+++ b/JMCR-Stable/real-world application/MyDerby-10.3/java/engine/org/apache/derby/impl/sql/compile/HasCorrelatedCRsVisitor.java
@@ -0,0 +1,134 @@
+/*\r
+\r
+   Derby - Class org.apache.derby.impl.sql.compile.HasCorrelatedCRsVisitor\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.compile;\r
+\r
+import org.apache.derby.iapi.services.sanity.SanityManager;\r
+import org.apache.derby.iapi.sql.compile.Visitable; \r
+import org.apache.derby.iapi.sql.compile.Visitor;\r
+\r
+\r
+import org.apache.derby.iapi.store.access.Qualifier;\r
+import org.apache.derby.iapi.error.StandardException;\r
+\r
+/**\r
+ * Find out if we have an correlated column reference\r
+ * anywhere below us.  Stop traversal as soon as we find one.\r
+ *\r
+ */\r
+public class HasCorrelatedCRsVisitor implements Visitor\r
+{\r
+       private boolean hasCorrelatedCRs;\r
+\r
+       /**\r
+        * Construct a visitor\r
+        */\r
+       public HasCorrelatedCRsVisitor()\r
+       {\r
+       }\r
+\r
+\r
+\r
+       ////////////////////////////////////////////////\r
+       //\r
+       // VISITOR INTERFACE\r
+       //\r
+       ////////////////////////////////////////////////\r
+\r
+       /**\r
+        * If we have found the target node, we are done.\r
+        *\r
+        * @param node  the node to process\r
+        *\r
+        * @return me\r
+        */\r
+       public Visitable visit(Visitable node)\r
+       {\r
+               if (node instanceof ColumnReference)\r
+               {\r
+                       if (((ColumnReference)node).getCorrelated())\r
+                       {\r
+                               hasCorrelatedCRs = true;\r
+                       }\r
+               }\r
+               else if (node instanceof VirtualColumnNode)\r
+               {\r
+                       if (((VirtualColumnNode)node).getCorrelated())\r
+                       {\r
+                               hasCorrelatedCRs = true;\r
+                       }\r
+               }\r
+               else if (node instanceof MethodCallNode)\r
+               {\r
+                       /* trigger action references are correlated\r
+                        */\r
+                       if (((MethodCallNode)node).getMethodName().equals("getTriggerExecutionContext") ||\r
+                               ((MethodCallNode)node).getMethodName().equals("TriggerOldTransitionRows") ||\r
+                               ((MethodCallNode)node).getMethodName().equals("TriggerNewTransitionRows")\r
+                          )\r
+                       {\r
+                               hasCorrelatedCRs = true;\r
+                       }\r
+               }\r
+               return node;\r
+       }\r
+\r
+       /**\r
+        * Stop traversal if we found the target node\r
+        *\r
+        * @return true/false\r
+        */\r
+       public boolean stopTraversal()\r
+       {\r
+               return hasCorrelatedCRs;\r
+       }\r
+\r
+       public boolean skipChildren(Visitable v)\r
+       {\r
+               return false;\r
+       }\r
+\r
+       ////////////////////////////////////////////////\r
+       //\r
+       // CLASS INTERFACE\r
+       //\r
+       ////////////////////////////////////////////////\r
+       /**\r
+        * Indicate whether we found the node in\r
+        * question\r
+        *\r
+        * @return true/false\r
+        */\r
+       public boolean hasCorrelatedCRs()\r
+       {\r
+               return hasCorrelatedCRs;\r
+       }\r
+\r
+       /**\r
+        * Shortcut to set if hasCorrelatedCRs\r
+        *\r
+        *      @param  value   true/false\r
+        */\r
+       public void setHasCorrelatedCRs(boolean value)\r
+       {\r
+               hasCorrelatedCRs = value;\r
+       }\r
+}\r