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comparison trajectorymanagement/src/DBSQLiteAccess.h @ 1159:e1e7acef8eab

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moved trajectory management library into Traffic Intelligence
author Nicolas Saunier <nicolas.saunier@polymtl.ca>
date Mon, 22 Feb 2021 22:09:35 -0500
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1158:7eb972942f22 1159:e1e7acef8eab
1 #ifndef DBSQLITEACCESS_H_
2 #define DBSQLITEACCESS_H_
3
4 #include "opencv2/core/core.hpp"
5
6 #include <sqlite3.h>
7
8 #include <sstream>
9 #include <string>
10 #include <vector>
11 #include <map>
12
13 template<typename T> class TrajectoryElement;
14
15 /**
16 * DBSQLiteAccess class.
17 *
18 * The DBSQLiteAccess class allows to perform basic operations on the database like connecting, disconnecting, creating a table, deleting a table or executing other statements.
19 */
20 class DBSQLiteAccess
21 {
22 public:
23 /**
24 * Constructor.
25 */
26 DBSQLiteAccess();
27
28 /**
29 * Destructor.
30 */
31 virtual ~DBSQLiteAccess();
32
33 /**
34 * Connect to the database.
35 *
36 * @param[in] database name of the database
37 * @return information whether the operation was successful
38 */
39 bool connect(const char *database);
40
41 /**
42 * Inform whether the connection to the database has been established.
43 *
44 * @return information whether the connection to the database has been established
45 */
46 bool isConnected();
47
48 /**
49 * Disconnect from the database.
50 *
51 * @return information whether the operation was successful
52 */
53 bool disconnect();
54
55 int sqliteErrCode();
56
57 /**
58 * Get error message.
59 *
60 * @return last error message
61 */
62 const char *sqliteErrMsg();
63
64 /**
65 * Execute statement.
66 *
67 * @param[in] statement statement
68 * @return information whether the operation was successful
69 */
70 bool executeStatement(const char *statement);
71
72 bool executeStatementGetSingleValue(const char *statement, std::string& result);
73
74 template<typename T>
75 bool executeStatementGetSingleValue(const char *statement, T& result)
76 {
77 char **dbResult = 0;
78 int nrows, ncols;
79 bool success = executeStatement(statement, &dbResult, nrows, ncols);
80
81 if (success && nrows == 1 && ncols == 1 && dbResult[1] != NULL)
82 {
83 std::istringstream is(dbResult[1]);
84 is >> result;
85 }
86 else
87 {
88 success = false;
89 }
90
91 sqlite3_free_table(dbResult);
92
93 return success;
94 }
95
96 /**
97 * Execute statement and get results.
98 *
99 * @param[in] statement statement
100 * @return result as a matrix of strings
101 */
102 bool executeStatementGetMatrix(const char *statement, std::vector<std::vector<std::string> >& result);
103
104 /**
105 * Execute statement and get results of a select.
106 *
107 * @param[in] statement statement
108 * @return result as a matrix of strings
109 */
110 bool executeStatementSelect(std::vector<std::vector<std::string> >& result, const char *statement);
111
112 /** Execute statement and get result of select as a list of integers (eg trajectory ids) */
113 bool executeStatementSelectIntegers(std::vector<int>& result, const char *statement);
114
115 /** Execute statement and get result of select as a list of integers (more than one per row, eg trajectory first and last frames) */
116 bool executeStatementSelectMultipleIntegers(std::vector<std::vector<int> >& result, const char *statement);
117
118 /**
119 * Execute statement and get results of a select for two integers followed by two floats.
120 *
121 * @param[in] statement statement
122 * @return result as a matrix of strings
123 */
124 bool executeStatementSelectTrajectoryElements(std::map<int, std::vector<TrajectoryElement<cv::Point2f> > >& trajectoryElements, const char *statement);
125
126 /**
127 * Execute statement and get results of a select for two integers (prototype id and matched trajectory id)
128 *
129 * @param[in]
130 * @return result as a matrix of strings
131 */
132 bool executeStatementSelectPrototypeMatches(std::multimap<int,int>& matches, const char *statement);
133
134 /**
135 * Execute begin transaction command.
136 *
137 * @return information whether the operation was successful
138 */
139 bool begin();
140
141 /**
142 * Execute end transaction command.
143 *
144 * @return information whether the operation was successful
145 */
146 bool end();
147
148 /**
149 * Execute rollback transaction command.
150 *
151 * @return information whether the operation was successful
152 */
153 bool rollback();
154
155 /**
156 * Execute commit transaction command.
157 *
158 * @return information whether the operation was successful
159 */
160 bool commit();
161
162 private:
163 /**
164 * Pointer to SQLite3 class.
165 */
166 sqlite3 *db;
167
168 /**
169 * Information whether a connection has been established.
170 */
171 bool connected;
172
173 /**
174 * Execute statement and get result.
175 *
176 * @param[in] statement statement
177 * @param[out] result results
178 * @param[out] nrows of rows in the returned data \a result
179 * @param[out] ncols of columns in the returned data \a result
180 * @return information whether the operation was successful
181 */
182 bool executeStatement(const char *statement, char ***result, int &nrows, int &ncols);
183 };
184
185 #endif /* DBSQLITEACCESS_H_ */