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#pragma once
#include <Core/Block.h>
#include <IO/Progress.h>
#include <IO/WriteBuffer.h>
#include <Common/Stopwatch.h>
#include <Formats/FormatSettings.h>
#include <Processors/Formats/OutputFormatWithUTF8ValidationAdaptor.h>
namespace DB
{
/** A stream for outputting data in XML format.
*/
class XMLRowOutputFormat final : public RowOutputFormatWithUTF8ValidationAdaptor
{
public:
XMLRowOutputFormat(WriteBuffer & out_, const Block & header_, const FormatSettings & format_settings_);
String getName() const override { return "XMLRowOutputFormat"; }
private:
void writeField(const IColumn & column, const ISerialization & serialization, size_t row_num) override;
void writeRowStartDelimiter() override;
void writeRowEndDelimiter() override;
void writePrefix() override;
void writeSuffix() override;
void finalizeImpl() override;
void resetFormatterImpl() override;
void writeMinExtreme(const Columns & columns, size_t row_num) override;
void writeMaxExtreme(const Columns & columns, size_t row_num) override;
void writeTotals(const Columns & columns, size_t row_num) override;
bool supportTotals() const override { return true; }
bool supportExtremes() const override { return true; }
void writeBeforeTotals() override;
void writeAfterTotals() override;
void writeBeforeExtremes() override;
void writeAfterExtremes() override;
void setRowsBeforeLimit(size_t rows_before_limit_) override
{
statistics.applied_limit = true;
statistics.rows_before_limit = rows_before_limit_;
}
void onRowsReadBeforeUpdate() override { row_count = getRowsReadBefore(); }
void onProgress(const Progress & value) override;
String getContentType() const override { return "application/xml; charset=UTF-8"; }
void writeExtremesElement(const char * title, const Columns & columns, size_t row_num);
void writeRowsBeforeLimitAtLeast();
void writeStatistics();
size_t field_number = 0;
size_t row_count = 0;
NamesAndTypes fields;
Names field_tag_names;
const FormatSettings format_settings;
};
}
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