1 /**

     2  * Relational pipes

     3  * Copyright © 2020 František Kučera (Frantovo.cz, GlobalCode.info)

     4  *

     5  * This program is free software: you can redistribute it and/or modify

     6  * it under the terms of the GNU General Public License as published by

     7  * the Free Software Foundation, version 3.

     8  *

     9  * This program is distributed in the hope that it will be useful,

    10  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

    12  * GNU General Public License for more details.

    13  *

    14  * You should have received a copy of the GNU General Public License

    15  * along with this program. If not, see <http://www.gnu.org/licenses/>.

    16  */

    17 #pragma once

    18 

    19 #include <codecvt>

    20 #include <locale>

    21 #include <vector>

    22 

    23 #include <relpipe/writer/typedefs.h>

    24 #include <relpipe/writer/TypeId.h>

    25 

    26 namespace relpipe {

    27 namespace tr {

    28 namespace sql {

    29 

    30 class ResultSet {

    31 public:

    32 

    33 	class MetaData {

    34 	public:

    35 

    36 		class ColumnDescriptor {

    37 		public:

    38 			relpipe::writer::string_t name;

    39 			relpipe::writer::TypeId type = relpipe::writer::TypeId::STRING;

    40 		};

    41 

    42 	private:

    43 		unsigned short columnCount;

    44 		std::vector<ColumnDescriptor> columnDescriptors;

    45 

    46 	public:

    47 		MetaData(unsigned short columnCount, std::vector<ColumnDescriptor> columnDescriptors);

    48 		virtual ~MetaData();

    49 		unsigned short getColumnCount();

    50 		ColumnDescriptor describeColumn(unsigned short columnNumber);

    51 	};

    52 private:

    53 	void* statement;

    54 	std::wstring_convert<std::codecvt_utf8<wchar_t>> convertor; // TODO: support also other encodings

    55 

    56 public:

    57 	ResultSet(void* statement);

    58 	virtual ~ResultSet();

    59 	MetaData* getMetaData();

    60 	bool next();

    61 	relpipe::writer::boolean_t getBoolean(unsigned short columnNumber, bool* isNull = nullptr);

    62 	relpipe::writer::integer_t getInteger(unsigned short columnNumber, bool* isNull = nullptr);

    63 	relpipe::writer::string_t getString(unsigned short columnNumber, bool* isNull = nullptr);

    64 };

    65 

    66 }

    67 }

    68 }