/*
Copyright (C) 2012, University of Cambridge, Department of Psychiatry.
Created by Rudolf Cardinal (rnc1001@cam.ac.uk).
This file is part of CamCOPS.
CamCOPS is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
CamCOPS is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with CamCOPS. If not, see <https://www.gnu.org/licenses/>.
*/
/* ============================================================================
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtSql module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
============================================================================ */
#pragma once
#include <QPointer>
#include <QSqlError>
#include <QSqlResult>
#include <QVariant>
#include <QVector>
// Non-private implementation of QSqlCachedResult / QSqlCachedResultPrivate
class SqlCachedResult : public QSqlResult
{
public:
typedef QVector<QVariant> ValueCache;
protected:
SqlCachedResult(const QSqlDriver* drv);
void init(int col_count);
void cleanup();
void clearValues();
virtual bool gotoNext(ValueCache& m_values, int index) = 0;
QVariant data(int i) override;
bool isNull(int i) override;
bool fetch(int i) override;
bool fetchNext() override;
bool fetchPrevious() override;
bool fetchFirst() override;
bool fetchLast() override;
int colCount() const;
ValueCache& cache();
void virtual_hook(int id, void* data) override;
void detachFromResultSet() override;
void setNumericalPrecisionPolicy(QSql::NumericalPrecisionPolicy policy) override;
private:
bool cacheNext();
// ------------------------------------------------------------------------
// These bits from QSqlCachedResultPrivate:
// ------------------------------------------------------------------------
bool canSeek(int i) const;
inline int cacheCount() const;
void init(int count, bool fo);
int nextIndex();
void revertLast();
ValueCache m_cache;
int m_row_cache_end;
int m_col_count;
bool m_at_end;
// ------------------------------------------------------------------------
// These bits from QSqlResultPrivate:
// ------------------------------------------------------------------------
struct QHolder {
QHolder(const QString &hldr = QString(), int index = -1) :
holder_name(hldr),
holder_pos(index)
{}
bool operator==(const QHolder &h) const
{
return h.holder_pos == holder_pos && h.holder_name == holder_name;
}
bool operator!=(const QHolder &h) const
{
return h.holder_pos != holder_pos || h.holder_name != holder_name;
}
QString holder_name;
int holder_pos;
};
void resetBindCount();
void clearIndex();
void clear();
virtual QString fieldSerial(int) const;
QString positionalToNamedBinding(const QString& query) const;
QString namedToPositionalBinding(const QString& query);
QString holderAt(int index) const;
QPointer<QSqlDriver> m_sqldriver;
// UNUSED, CLANG COMPLAINS // int m_idx;
QString m_sql;
// UNUSED, CLANG COMPLAINS // bool m_active;
// UNUSED, CLANG COMPLAINS // bool m_is_sel;
QSqlError m_error;
bool m_forward_only;
// UNUSED, CLANG COMPLAINS // QSql::NumericalPrecisionPolicy m_precision_policy;
int m_bind_count;
// UNUSED, CLANG COMPLAINS // QSqlResult::BindingSyntax m_binds;
QString m_executed_query;
QHash<int, QSql::ParamType> m_types;
QVector<QVariant> m_values;
typedef QHash<QString, QList<int>> IndexMap;
IndexMap m_indexes;
typedef QVector<QHolder> QHolderVector;
QHolderVector m_holders;
};