--- /dev/null
+/*\r
+\r
+ Derby - Class org.apache.derby.impl.store.access.BackingStoreHashTableFromScan\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.store.access;\r
+\r
+import org.apache.derby.iapi.error.StandardException; \r
+\r
+import org.apache.derby.iapi.store.access.conglomerate.ScanManager;\r
+\r
+import org.apache.derby.iapi.store.access.Qualifier;\r
+import org.apache.derby.iapi.store.access.RowSource;\r
+import org.apache.derby.iapi.store.access.TransactionController;\r
+\r
+import org.apache.derby.iapi.types.DataValueDescriptor;\r
+\r
+import org.apache.derby.iapi.store.access.BackingStoreHashtable;\r
+import org.apache.derby.iapi.services.io.FormatableBitSet;\r
+\r
+import java.util.Properties;\r
+\r
+/**\r
+\r
+Extend BackingStoreHashtable with the ability to maintain the underlying \r
+openScan() until the hashtable has been closed. This is necessary for \r
+long row access. Access to long row delays actual objectification until\r
+the columns are accessed, but depends on the underlying table to be still\r
+open when the column is accessed. \r
+\r
+<P>\r
+Transactions are obtained from an AccessFactory.\r
+@see BackingStoreHashtable\r
+\r
+**/\r
+\r
+class BackingStoreHashTableFromScan extends BackingStoreHashtable\r
+{\r
+\r
+ /**************************************************************************\r
+ * Fields of the class\r
+ **************************************************************************\r
+ */\r
+ private ScanManager open_scan;\r
+\r
+ /**************************************************************************\r
+ * Constructors for This class:\r
+ **************************************************************************\r
+ */\r
+ public BackingStoreHashTableFromScan(\r
+ TransactionController tc,\r
+ long conglomId,\r
+ int open_mode,\r
+ int lock_level,\r
+ int isolation_level,\r
+ FormatableBitSet scanColumnList,\r
+ DataValueDescriptor[] startKeyValue,\r
+ int startSearchOperator,\r
+ Qualifier qualifier[][],\r
+ DataValueDescriptor[] stopKeyValue,\r
+ int stopSearchOperator,\r
+ long max_rowcnt,\r
+ int[] key_column_numbers,\r
+ boolean remove_duplicates,\r
+ long estimated_rowcnt,\r
+ long max_inmemory_rowcnt,\r
+ int initialCapacity,\r
+ float loadFactor,\r
+ boolean collect_runtimestats,\r
+ boolean skipNullKeyColumns,\r
+ boolean keepAfterCommit)\r
+ throws StandardException\r
+ {\r
+\r
+ super(\r
+ tc, \r
+ (RowSource) null,\r
+ key_column_numbers,\r
+ remove_duplicates,\r
+ estimated_rowcnt,\r
+ max_inmemory_rowcnt,\r
+ initialCapacity,\r
+ loadFactor,\r
+ skipNullKeyColumns,\r
+ keepAfterCommit);\r
+\r
+ open_scan = (ScanManager)\r
+ tc.openScan(\r
+ conglomId,\r
+ false,\r
+ open_mode,\r
+ lock_level,\r
+ isolation_level,\r
+ scanColumnList,\r
+ startKeyValue,\r
+ startSearchOperator,\r
+ qualifier,\r
+ stopKeyValue,\r
+ stopSearchOperator);\r
+\r
+ open_scan.fetchSet(\r
+ max_rowcnt, key_column_numbers, this);\r
+\r
+ if (collect_runtimestats)\r
+ {\r
+ Properties prop = new Properties();\r
+ open_scan.getScanInfo().getAllScanInfo(prop);\r
+ this.setAuxillaryRuntimeStats(prop);\r
+ prop = null;\r
+ }\r
+ }\r
+\r
+\r
+ /**************************************************************************\r
+ * Private/Protected methods of This class:\r
+ **************************************************************************\r
+ */\r
+\r
+ /**************************************************************************\r
+ * Public Methods of This class:\r
+ **************************************************************************\r
+ */\r
+\r
+ /**\r
+ * Close the BackingStoreHashtable.\r
+ * <p>\r
+ * Perform any necessary cleanup after finishing with the hashtable. Will\r
+ * deallocate/dereference objects as necessary. If the table has gone\r
+ * to disk this will drop any on disk files used to support the hash table.\r
+ * <p>\r
+ *\r
+ * @exception StandardException Standard exception policy.\r
+ **/\r
+ public void close() \r
+ throws StandardException\r
+ {\r
+ open_scan.close();\r
+\r
+ super.close();\r
+\r
+ return;\r
+ }\r
+\r
+ /**************************************************************************\r
+ * Public Methods of XXXX class:\r
+ **************************************************************************\r
+ */\r
+}\r
projects / Benchmarks_CSolver.git / blobdiff