1/*
2 * Legal Notice
3 *
4 * This document and associated source code (the "Work") is a part of a
5 * benchmark specification maintained by the TPC.
6 *
7 * The TPC reserves all right, title, and interest to the Work as provided
8 * under U.S. and international laws, including without limitation all patent
9 * and trademark rights therein.
10 *
11 * No Warranty
12 *
13 * 1.1 TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, THE INFORMATION
14 * CONTAINED HEREIN IS PROVIDED "AS IS" AND WITH ALL FAULTS, AND THE
15 * AUTHORS AND DEVELOPERS OF THE WORK HEREBY DISCLAIM ALL OTHER
16 * WARRANTIES AND CONDITIONS, EITHER EXPRESS, IMPLIED OR STATUTORY,
17 * INCLUDING, BUT NOT LIMITED TO, ANY (IF ANY) IMPLIED WARRANTIES,
18 * DUTIES OR CONDITIONS OF MERCHANTABILITY, OF FITNESS FOR A PARTICULAR
19 * PURPOSE, OF ACCURACY OR COMPLETENESS OF RESPONSES, OF RESULTS, OF
20 * WORKMANLIKE EFFORT, OF LACK OF VIRUSES, AND OF LACK OF NEGLIGENCE.
21 * ALSO, THERE IS NO WARRANTY OR CONDITION OF TITLE, QUIET ENJOYMENT,
22 * QUIET POSSESSION, CORRESPONDENCE TO DESCRIPTION OR NON-INFRINGEMENT
23 * WITH REGARD TO THE WORK.
24 * 1.2 IN NO EVENT WILL ANY AUTHOR OR DEVELOPER OF THE WORK BE LIABLE TO
25 * ANY OTHER PARTY FOR ANY DAMAGES, INCLUDING BUT NOT LIMITED TO THE
26 * COST OF PROCURING SUBSTITUTE GOODS OR SERVICES, LOST PROFITS, LOSS
27 * OF USE, LOSS OF DATA, OR ANY INCIDENTAL, CONSEQUENTIAL, DIRECT,
28 * INDIRECT, OR SPECIAL DAMAGES WHETHER UNDER CONTRACT, TORT, WARRANTY,
29 * OR OTHERWISE, ARISING IN ANY WAY OUT OF THIS OR ANY OTHER AGREEMENT
30 * RELATING TO THE WORK, WHETHER OR NOT SUCH AUTHOR OR DEVELOPER HAD
31 * ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.
32 *
33 * Contributors
34 * - Doug Johnson
35 */
36
37/*
38 * Class representing the Fixed table.
39 */
40#ifndef FIXED_TABLE_H
41#define FIXED_TABLE_H
42
43namespace TPCE {
44
45template <class DataFileT, class TableRowT> class FixedTable {
46protected:
47 const DataFileT &df;
48 TableRowT tableRow;
49 int recordIdx;
50
51public:
52 FixedTable(const DataFileT &dataFile) : df(dataFile), tableRow(), recordIdx(-1) {
53 }
54
55 virtual ~FixedTable() {
56 }
57
58 /*
59 * Generates all fields for the next record.
60 * Template Method Pattern used to accomodate
61 * subtle variations in underlying data files
62 * (i.e. DataFile vs. WeightedDataFile).
63 */
64 bool GenerateNextRecord() {
65 // Don't increment past size().
66 if (MaxRecordIdx() != recordIdx) {
67 ++recordIdx;
68 }
69
70 // See if we just went past the end.
71 if (MaxRecordIdx() == recordIdx) {
72 return false;
73 }
74
75 LoadTableRow();
76
77 // We have a valid record.
78 return true;
79 }
80
81 virtual unsigned int MaxRecordIdx() const {
82 return df.size();
83 }
84
85 const TableRowT &GetRow() const {
86 return tableRow;
87 }
88
89 virtual void LoadTableRow() = 0;
90};
91
92} // namespace TPCE
93#endif // FIXED_TABLE_H
94