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