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79 lines
3.3 KiB
C++
79 lines
3.3 KiB
C++
/********************************************************************
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* gnc-dbisqlresult.hpp: Iterable wrapper for dbi_result. *
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* *
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* Copyright 2016 John Ralls <jralls@ceridwen.us *
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* *
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* This program is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU General Public License as *
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* published by the Free Software Foundation; either version 2 of *
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* the License, or (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License*
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* along with this program; if not, contact: *
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* *
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* Free Software Foundation Voice: +1-617-542-5942 *
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* 51 Franklin Street, Fifth Floor Fax: +1-617-542-2652 *
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* Boston, MA 02110-1301, USA gnu@gnu.org *
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\********************************************************************/
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/* Private structures and variables for gnc-backend-dbi.c and its unit tests */
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#ifndef __GNC_DBISQLBACKEND_HPP__
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#define __GNC_DBISQLBACKEND_HPP__
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#include "gnc-backend-dbi.h"
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#include <gnc-sql-result.hpp>
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class GncDbiSqlConnection;
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/**
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* An iterable wrapper for dbi_result; allows using C++11 range for.
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*/
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class GncDbiSqlResult : public GncSqlResult
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{
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public:
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GncDbiSqlResult(const GncDbiSqlConnection* conn, dbi_result result) :
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m_conn{conn}, m_dbi_result{result}, m_iter{this}, m_row{&m_iter},
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m_sentinel{nullptr} {}
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~GncDbiSqlResult();
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uint64_t size() const noexcept;
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int dberror() const noexcept;
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GncSqlRow& begin();
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GncSqlRow& end() { return m_sentinel; }
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protected:
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class IteratorImpl : public GncSqlResult::IteratorImpl
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{
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public:
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~IteratorImpl() = default;
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IteratorImpl(GncDbiSqlResult* inst) : m_inst{inst} {}
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virtual GncSqlRow& operator++();
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virtual GncSqlRow& operator++(int) { return ++(*this); };
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virtual GncSqlResult* operator*() { return m_inst; }
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virtual int64_t get_int_at_col (const char* col) const;
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virtual double get_float_at_col (const char* col) const;
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virtual double get_double_at_col (const char* col) const;
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virtual std::string get_string_at_col (const char* col)const;
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virtual time64 get_time64_at_col (const char* col) const;
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virtual bool is_col_null(const char* col) const noexcept
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{
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return dbi_result_field_is_null(m_inst->m_dbi_result, col);
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}
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private:
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GncDbiSqlResult* m_inst = nullptr;
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};
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private:
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const GncDbiSqlConnection* m_conn = nullptr;
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dbi_result m_dbi_result;
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IteratorImpl m_iter;
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GncSqlRow m_row;
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GncSqlRow m_sentinel;
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};
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#endif //__GNC_DBISQLRESULT_HPP__
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