ClickHouse/dbms/include/DB/DataStreams/XMLRowOutputStream.h
Alexey Milovidov 8b3afeb60d Squashed commit of the following:
commit f968e7e7f0d84c89fd26dea1d541bd9f6041d7c8
Author: Alexey Milovidov <milovidov@yandex-team.ru>
Date:   Tue Feb 16 06:11:29 2016 +0300

    Addition [#METR-2944].

commit 7524981fa7c4f22929dd5009444a0ae28500f620
Author: Alexey Milovidov <milovidov@yandex-team.ru>
Date:   Tue Feb 16 06:08:43 2016 +0300

    Fixed error (incomplete) [#METR-2944].

commit 2f1e7bf9f46cd9ce958ade9041c00ce067940fd2
Author: Alexey Milovidov <milovidov@yandex-team.ru>
Date:   Tue Feb 16 05:37:43 2016 +0300

    Improving performance of row formats [#METR-2944].

commit 9848910f235863c9571ef1ebe0d87d4929ee283c
Author: Alexey Milovidov <milovidov@yandex-team.ru>
Date:   Tue Feb 16 00:37:12 2016 +0300

    Improving performance of text formats [#METR-2944].

commit 3aedc7fd784af962e64ffdd10ec23ac53827d8e2
Author: Alexey Milovidov <milovidov@yandex-team.ru>
Date:   Tue Feb 16 00:18:00 2016 +0300

    Improving performance of row formats [#METR-2944].

commit cb5932c2b0385604477e69c8262dc31a4bb4b23b
Author: Alexey Milovidov <milovidov@yandex-team.ru>
Date:   Mon Feb 15 00:53:27 2016 +0300

    Fixed error.

commit 42863fd4eddeef594e846c598b92877b6ff86fa6
Author: Alexey Milovidov <milovidov@yandex-team.ru>
Date:   Sun Feb 14 23:13:46 2016 +0300

    Improving performance of row formats [#METR-2944].

commit 71c6fb19a85a79297433ceb486fdb97e551d964f
Author: Alexey Milovidov <milovidov@yandex-team.ru>
Date:   Sun Feb 14 16:58:56 2016 +0300

    Improving performance of row formats [#METR-2944].
2016-02-16 19:39:39 +03:00

65 lines
1.5 KiB
C++

#pragma once
#include <DB/Core/Block.h>
#include <DB/IO/WriteBuffer.h>
#include <DB/DataStreams/IRowOutputStream.h>
namespace DB
{
/** Поток для вывода данных в формате XML.
*/
class XMLRowOutputStream : public IRowOutputStream
{
public:
XMLRowOutputStream(WriteBuffer & ostr_, const Block & sample_);
void writeField(const IColumn & column, const IDataType & type, size_t row_num) override;
void writeRowStartDelimiter() override;
void writeRowEndDelimiter() override;
void writePrefix() override;
void writeSuffix() override;
void flush() override
{
ostr->next();
if (validating_ostr)
dst_ostr.next();
}
void setRowsBeforeLimit(size_t rows_before_limit_) override
{
applied_limit = true;
rows_before_limit = rows_before_limit_;
}
void setTotals(const Block & totals_) override { totals = totals_; }
void setExtremes(const Block & extremes_) override { extremes = extremes_; }
String getContentType() const override { return "application/xml; charset=UTF-8"; }
protected:
void writeRowsBeforeLimitAtLeast();
virtual void writeTotals();
virtual void writeExtremes();
WriteBuffer & dst_ostr;
std::unique_ptr<WriteBuffer> validating_ostr; /// Валидирует UTF-8 последовательности.
WriteBuffer * ostr;
size_t field_number = 0;
size_t row_count = 0;
bool applied_limit = false;
size_t rows_before_limit = 0;
NamesAndTypes fields;
Names field_tag_names;
Block totals;
Block extremes;
};
}