94 lines
2.7 KiB
C++
94 lines
2.7 KiB
C++
/*
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* Legal Notice
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*
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* This document and associated source code (the "Work") is a part of a
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* benchmark specification maintained by the TPC.
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*
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* The TPC reserves all right, title, and interest to the Work as provided
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* under U.S. and international laws, including without limitation all patent
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* and trademark rights therein.
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*
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* No Warranty
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*
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* 1.1 TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, THE INFORMATION
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* CONTAINED HEREIN IS PROVIDED "AS IS" AND WITH ALL FAULTS, AND THE
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* AUTHORS AND DEVELOPERS OF THE WORK HEREBY DISCLAIM ALL OTHER
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* WARRANTIES AND CONDITIONS, EITHER EXPRESS, IMPLIED OR STATUTORY,
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* INCLUDING, BUT NOT LIMITED TO, ANY (IF ANY) IMPLIED WARRANTIES,
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* DUTIES OR CONDITIONS OF MERCHANTABILITY, OF FITNESS FOR A PARTICULAR
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* PURPOSE, OF ACCURACY OR COMPLETENESS OF RESPONSES, OF RESULTS, OF
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* WORKMANLIKE EFFORT, OF LACK OF VIRUSES, AND OF LACK OF NEGLIGENCE.
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* ALSO, THERE IS NO WARRANTY OR CONDITION OF TITLE, QUIET ENJOYMENT,
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* QUIET POSSESSION, CORRESPONDENCE TO DESCRIPTION OR NON-INFRINGEMENT
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* WITH REGARD TO THE WORK.
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* 1.2 IN NO EVENT WILL ANY AUTHOR OR DEVELOPER OF THE WORK BE LIABLE TO
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* ANY OTHER PARTY FOR ANY DAMAGES, INCLUDING BUT NOT LIMITED TO THE
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* COST OF PROCURING SUBSTITUTE GOODS OR SERVICES, LOST PROFITS, LOSS
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* OF USE, LOSS OF DATA, OR ANY INCIDENTAL, CONSEQUENTIAL, DIRECT,
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* INDIRECT, OR SPECIAL DAMAGES WHETHER UNDER CONTRACT, TORT, WARRANTY,
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* OR OTHERWISE, ARISING IN ANY WAY OUT OF THIS OR ANY OTHER AGREEMENT
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* RELATING TO THE WORK, WHETHER OR NOT SUCH AUTHOR OR DEVELOPER HAD
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* ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.
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*
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* Contributors
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* - Doug Johnson
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*/
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/*
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* Class representing the Fixed table.
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*/
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#ifndef FIXED_TABLE_H
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#define FIXED_TABLE_H
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namespace TPCE {
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template <class DataFileT, class TableRowT> class FixedTable {
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protected:
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const DataFileT &df;
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TableRowT tableRow;
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int recordIdx;
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public:
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FixedTable(const DataFileT &dataFile) : df(dataFile), tableRow(), recordIdx(-1) {
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}
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virtual ~FixedTable() {
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}
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/*
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* Generates all fields for the next record.
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* Template Method Pattern used to accommodate
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* subtle variations in underlying data files
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* (i.e. DataFile vs. WeightedDataFile).
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*/
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bool GenerateNextRecord() {
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// Don't increment past size().
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if (MaxRecordIdx() != recordIdx) {
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++recordIdx;
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}
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// See if we just went past the end.
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if (MaxRecordIdx() == recordIdx) {
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return false;
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}
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LoadTableRow();
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// We have a valid record.
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return true;
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}
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virtual unsigned int MaxRecordIdx() const {
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return df.size();
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}
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const TableRowT &GetRow() const {
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return tableRow;
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}
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virtual void LoadTableRow() = 0;
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};
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} // namespace TPCE
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#endif // FIXED_TABLE_H
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