qt-creator/src/libs/sqlite/sqlitereadstatement.h

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** Copyright (C) 2016 The Qt Company Ltd.
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#pragma once

#include "sqlitebasestatement.h"

namespace Sqlite {

template<int ResultCount>
class ReadStatement final : protected StatementImplementation<BaseStatement, ResultCount>
{
    using Base = StatementImplementation<BaseStatement, ResultCount>;

public:
    ReadStatement(Utils::SmallStringView sqlStatement, Database &database)
        : Base{sqlStatement, database}
    {
        checkIsReadOnlyStatement();
        Base::checkColumnCount(ResultCount);
    }

    using Base::optionalValue;
    using Base::range;
    using Base::rangeWithTransaction;
    using Base::readCallback;
    using Base::readTo;
    using Base::toValue;
    using Base::value;
    using Base::values;

    template<typename ResultType, typename... QueryTypes>
    auto valueWithTransaction(const QueryTypes &...queryValues)
    {
        DeferredTransaction transaction{Base::database()};

        auto resultValue = Base::template value<ResultType>(queryValues...);

        transaction.commit();

        return resultValue;
    }

    template<typename ResultType, typename... QueryTypes>
    auto optionalValueWithTransaction(const QueryTypes &...queryValues)
    {
        DeferredTransaction transaction{Base::database()};

        auto resultValue = Base::template optionalValue<ResultType>(queryValues...);

        transaction.commit();

        return resultValue;
    }

    template<typename ResultType, typename... QueryTypes>
    auto valuesWithTransaction(std::size_t reserveSize, const QueryTypes &...queryValues)
    {
        DeferredTransaction transaction{Base::database()};

        auto resultValues = Base::template values<ResultType>(reserveSize, queryValues...);

        transaction.commit();

        return resultValues;
    }

    template<typename Callable, typename... QueryTypes>
    void readCallbackWithTransaction(Callable &&callable, const QueryTypes &...queryValues)
    {
        DeferredTransaction transaction{Base::database()};

        Base::readCallback(std::forward<Callable>(callable), queryValues...);

        transaction.commit();
    }

    template<typename Container, typename... QueryTypes>
    void readToWithTransaction(Container &container, const QueryTypes &...queryValues)
    {
        DeferredTransaction transaction{Base::database()};

        Base::readTo(container, queryValues...);

        transaction.commit();
    }

protected:
    void checkIsReadOnlyStatement()
    {
        if (!Base::isReadOnlyStatement())
            throw NotReadOnlySqlStatement(
                "SqliteStatement::SqliteReadStatement: is not read only statement!");
    }
};

template<int ResultCount>
ReadStatement(ReadStatement<ResultCount> &) -> ReadStatement<ResultCount>;
template<int ResultCount>
ReadStatement(const ReadStatement<ResultCount> &) -> ReadStatement<ResultCount>;

} // namespace Sqlite