ClickHouse/src/Processors/Formats/Impl/JSONCompactEachRowRowOutputFormat.h

#pragma once

#include <Core/Block.h>
#include <IO/WriteBuffer.h>
#include <Processors/Formats/IRowOutputFormat.h>
#include <Formats/FormatSettings.h>


namespace DB
{

/** The stream for outputting data in JSON format, by object per line.
  * Does not validate UTF-8.
  */
class JSONCompactEachRowRowOutputFormat : public IRowOutputFormat
{
public:
    JSONCompactEachRowRowOutputFormat(
        WriteBuffer & out_,
        const Block & header_,
        const RowOutputFormatParams & params_,
        const FormatSettings & settings_,
        bool with_names_,
        bool with_types_,
        bool yield_strings_);

    String getName() const override { return "JSONCompactEachRowRowOutputFormat"; }

private:
    void writePrefix() override;

    void writeTotals(const Columns & columns, size_t row_num) override;

    void writeField(const IColumn & column, const ISerialization & serialization, size_t row_num) override;
    void writeFieldDelimiter() override;
    void writeRowStartDelimiter() override;
    void writeRowEndDelimiter() override;

    void consumeTotals(Chunk) override;
    /// No extremes.
    void consumeExtremes(Chunk) override {}

    void writeLine(const std::vector<String> & values);

    FormatSettings settings;
    bool with_names;
    bool with_types;
    bool yield_strings;
};
}