1 | // Copyright (C) 2016 The Qt Company Ltd. |
2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
3 | |
4 | #ifndef QSQLCACHEDRESULT_P_H |
5 | #define QSQLCACHEDRESULT_P_H |
6 | |
7 | // |
8 | // W A R N I N G |
9 | // ------------- |
10 | // |
11 | // This file is not part of the Qt API. It exists for the convenience |
12 | // of other Qt classes. This header file may change from version to |
13 | // version without notice, or even be removed. |
14 | // |
15 | // We mean it. |
16 | // |
17 | |
18 | #include <QtSql/private/qtsqlglobal_p.h> |
19 | #include "QtSql/qsqlresult.h" |
20 | #include "QtSql/private/qsqlresult_p.h" |
21 | #include <QtCore/qcontainerfwd.h> |
22 | |
23 | QT_BEGIN_NAMESPACE |
24 | |
25 | class QVariant; |
26 | |
27 | class QSqlCachedResultPrivate; |
28 | |
29 | class Q_SQL_EXPORT QSqlCachedResult: public QSqlResult |
30 | { |
31 | Q_DECLARE_PRIVATE(QSqlCachedResult) |
32 | |
33 | public: |
34 | typedef QList<QVariant> ValueCache; |
35 | |
36 | protected: |
37 | QSqlCachedResult(QSqlCachedResultPrivate &d); |
38 | |
39 | void init(int colCount); |
40 | void cleanup(); |
41 | void clearValues(); |
42 | |
43 | virtual bool gotoNext(ValueCache &values, int index) = 0; |
44 | |
45 | QVariant data(int i) override; |
46 | bool isNull(int i) override; |
47 | bool fetch(int i) override; |
48 | bool fetchNext() override; |
49 | bool fetchPrevious() override; |
50 | bool fetchFirst() override; |
51 | bool fetchLast() override; |
52 | |
53 | int colCount() const; |
54 | ValueCache &cache(); |
55 | |
56 | void virtual_hook(int id, void *data) override; |
57 | void detachFromResultSet() override; |
58 | void setNumericalPrecisionPolicy(QSql::NumericalPrecisionPolicy policy) override; |
59 | private: |
60 | bool cacheNext(); |
61 | }; |
62 | |
63 | class Q_SQL_EXPORT QSqlCachedResultPrivate: public QSqlResultPrivate |
64 | { |
65 | Q_DECLARE_PUBLIC(QSqlCachedResult) |
66 | |
67 | public: |
68 | using QSqlResultPrivate::QSqlResultPrivate; |
69 | |
70 | bool canSeek(int i) const; |
71 | inline int cacheCount() const; |
72 | void init(int count, bool fo); |
73 | void cleanup(); |
74 | int nextIndex(); |
75 | void revertLast(); |
76 | |
77 | QSqlCachedResult::ValueCache cache; |
78 | int rowCacheEnd = 0; |
79 | int colCount = 0; |
80 | bool atEnd = false; |
81 | }; |
82 | |
83 | QT_END_NAMESPACE |
84 | |
85 | #endif // QSQLCACHEDRESULT_P_H |
86 | |