/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtSql module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights.  These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
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**
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****************************************************************************/

#ifndef QSQLQUERY_H
#define QSQLQUERY_H

#include <QtSql/qsql.h>
#include <QtSql/qsqldatabase.h>
#include <QtCore/qstring.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Sql)

class QVariant;
class QSqlDriver;
class QSqlError;
class QSqlResult;
class QSqlRecord;
template <class Key, class T> class QMap;
class QSqlQueryPrivate;

class Q_SQL_EXPORT QSqlQuery
{
public:
    QSqlQuery(QSqlResult *r);
    QSqlQuery(const QString& query = QString(), QSqlDatabase db = QSqlDatabase());
    explicit QSqlQuery(QSqlDatabase db);
    QSqlQuery(const QSqlQuery& other);
    QSqlQuery& operator=(const QSqlQuery& other);
    ~QSqlQuery();

    bool isValid() const;
    bool isActive() const;
    bool isNull(int field) const;
    int at() const;
    QString lastQuery() const;
    int numRowsAffected() const;
    QSqlError lastError() const;
    bool isSelect() const;
    int size() const;
    const QSqlDriver* driver() const;
    const QSqlResult* result() const;
    bool isForwardOnly() const;
    QSqlRecord record() const;

    void setForwardOnly(bool forward);
    bool exec(const QString& query);
    QVariant value(int i) const;

    void setNumericalPrecisionPolicy(QSql::NumericalPrecisionPolicy precisionPolicy);
    QSql::NumericalPrecisionPolicy numericalPrecisionPolicy() const;

    bool seek(int i, bool relative = false);
    bool next();
    bool previous();
#ifdef QT3_SUPPORT
    inline QT3_SUPPORT bool prev() { return previous(); }
#endif
    bool first();
    bool last();

    void clear();

    // prepared query support
    bool exec();
    enum BatchExecutionMode { ValuesAsRows, ValuesAsColumns };
    bool execBatch(BatchExecutionMode mode = ValuesAsRows);
    bool prepare(const QString& query);
    void bindValue(const QString& placeholder, const QVariant& val,
                   QSql::ParamType type = QSql::In);
    void bindValue(int pos, const QVariant& val, QSql::ParamType type = QSql::In);
    void addBindValue(const QVariant& val, QSql::ParamType type = QSql::In);
    QVariant boundValue(const QString& placeholder) const;
    QVariant boundValue(int pos) const;
    QMap<QString, QVariant> boundValues() const;
    QString executedQuery() const;
    QVariant lastInsertId() const;
    void finish();
    bool nextResult();

private:
    QSqlQueryPrivate* d;
};

QT_END_NAMESPACE

QT_END_HEADER

#endif // QSQLQUERY_H
