Adding JMCR-Stable version

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

diff --git a/JMCR-Stable/real-world application/MyDerby-10.3/java/engine/org/apache/derby/impl/sql/execute/ReferencedKeyRIChecker.java b/JMCR-Stable/real-world application/MyDerby-10.3/java/engine/org/apache/derby/impl/sql/execute/ReferencedKeyRIChecker.java
new file mode 100644 (file)
index 0000000..4941fd7
--- /dev/null
+++ b/JMCR-Stable/real-world application/MyDerby-10.3/java/engine/org/apache/derby/impl/sql/execute/ReferencedKeyRIChecker.java
@@ -0,0 +1,126 @@
+/*\r
+\r
+   Derby - Class org.apache.derby.impl.sql.execute.ReferencedKeyRIChecker\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.services.sanity.SanityManager;\r
+import org.apache.derby.iapi.error.StandardException;\r
+\r
+import org.apache.derby.iapi.sql.StatementUtil;\r
+import org.apache.derby.iapi.sql.execute.ExecRow;\r
+import org.apache.derby.iapi.sql.execute.ExecIndexRow;\r
+import org.apache.derby.iapi.reference.SQLState;\r
+import org.apache.derby.iapi.store.access.ScanController;\r
+import org.apache.derby.iapi.store.access.TransactionController;\r
+import org.apache.derby.iapi.sql.StatementType;\r
+\r
+/**\r
+ * A Referential Integrity checker for a change\r
+ * to a referenced key (primary or unique).   Makes\r
+ * sure that all the referenced key row is not\r
+ * referenced by any of its foreign keys.  see \r
+ * ForeignKeyRIChecker for the code that validates\r
+ * changes to foreign keys.\r
+ */\r
+public class ReferencedKeyRIChecker extends GenericRIChecker\r
+{\r
+       /**\r
+        * @param tc            the xact controller\r
+        * @param fkinfo        the foreign key information \r
+        *\r
+        * @exception StandardException         Thrown on failure\r
+        */\r
+       ReferencedKeyRIChecker(TransactionController tc, FKInfo fkinfo)\r
+               throws StandardException\r
+       {\r
+               super(tc, fkinfo);\r
+\r
+               if (SanityManager.DEBUG)\r
+               {\r
+                       if (fkInfo.type != FKInfo.REFERENCED_KEY)\r
+                       {\r
+                               SanityManager.THROWASSERT("invalid type "+fkInfo.type+\r
+                                       " for a ReferencedKeyRIChecker");\r
+                       }\r
+               } \r
+       }\r
+\r
+       /**\r
+        * Check that the row either has a null column(s), or\r
+        * has no corresponding foreign keys.\r
+        * <p> \r
+        * If a foreign key is found, an exception is thrown.\r
+        * If not, the scan is closed.\r
+        *\r
+        * @param row   the row to check\r
+        *\r
+        * @exception StandardException on unexpected error, or\r
+        *              on a primary/unique key violation\r
+        */\r
+       void doCheck(ExecRow row, boolean restrictCheckOnly) throws StandardException\r
+       {\r
+               /*\r
+               ** If any of the columns are null, then the\r
+               ** check always succeeds.\r
+               */\r
+               if (isAnyFieldNull(row))\r
+               {\r
+                       return;\r
+               }\r
+\r
+               /*\r
+               ** Otherwise, should be no rows found.\r
+               ** Check each conglomerate.\r
+               */\r
+               ScanController scan;\r
+\r
+               for (int i = 0; i < fkInfo.fkConglomNumbers.length; i++)\r
+               {\r
+                       \r
+                       if(restrictCheckOnly)\r
+                       {\r
+                               if(fkInfo.raRules[i] != StatementType.RA_RESTRICT)\r
+                                       continue;\r
+                       }\r
+\r
+                       scan = getScanController(fkInfo.fkConglomNumbers[i], fkScocis[i], fkDcocis[i], row);\r
+                       if (scan.next())\r
+                       {\r
+                               close();\r
+                               StandardException se = StandardException.newException(SQLState.LANG_FK_VIOLATION, fkInfo.fkConstraintNames[i],\r
+                                                                               fkInfo.tableName,\r
+                                                                               StatementUtil.typeName(fkInfo.stmtType),\r
+                                                                               RowUtil.toString(row, fkInfo.colArray));\r
+\r
+                               throw se;\r
+                       }\r
+                       /*\r
+                       ** Move off of the current row to release any locks.\r
+                       */\r
+                       scan.next();\r
+               }\r
+       }\r
+}\r
+\r
+\r
+\r
+\r
+\r