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39
40#ifndef QSQLCACHEDRESULT_P_H
41#define QSQLCACHEDRESULT_P_H
42
43//
44// W A R N I N G
45// -------------
46//
47// This file is not part of the Qt API. It exists for the convenience
48// of other Qt classes. This header file may change from version to
49// version without notice, or even be removed.
50//
51// We mean it.
52//
53
54#include <QtSql/private/qtsqlglobal_p.h>
55#include "QtSql/qsqlresult.h"
56#include "QtSql/private/qsqlresult_p.h"
57
58QT_BEGIN_NAMESPACE
59
60class QVariant;
61template <typename T> class QVector;
62
63class QSqlCachedResultPrivate;
64
65class Q_SQL_EXPORT QSqlCachedResult: public QSqlResult
66{
67 Q_DECLARE_PRIVATE(QSqlCachedResult)
68
69public:
70 typedef QVector<QVariant> ValueCache;
71
72protected:
73 QSqlCachedResult(QSqlCachedResultPrivate &d);
74
75 void init(int colCount);
76 void cleanup();
77 void clearValues();
78
79 virtual bool gotoNext(ValueCache &values, int index) = 0;
80
81 QVariant data(int i) override;
82 bool isNull(int i) override;
83 bool fetch(int i) override;
84 bool fetchNext() override;
85 bool fetchPrevious() override;
86 bool fetchFirst() override;
87 bool fetchLast() override;
88
89 int colCount() const;
90 ValueCache &cache();
91
92 void virtual_hook(int id, void *data) override;
93 void detachFromResultSet() override;
94 void setNumericalPrecisionPolicy(QSql::NumericalPrecisionPolicy policy) override;
95private:
96 bool cacheNext();
97};
98
99class Q_SQL_EXPORT QSqlCachedResultPrivate: public QSqlResultPrivate
100{
101 Q_DECLARE_PUBLIC(QSqlCachedResult)
102
103public:
104 QSqlCachedResultPrivate(QSqlCachedResult *q, const QSqlDriver *drv);
105 bool canSeek(int i) const;
106 inline int cacheCount() const;
107 void init(int count, bool fo);
108 void cleanup();
109 int nextIndex();
110 void revertLast();
111
112 QSqlCachedResult::ValueCache cache;
113 int rowCacheEnd;
114 int colCount;
115 bool atEnd;
116};
117
118QT_END_NAMESPACE
119
120#endif // QSQLCACHEDRESULT_P_H
121