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#include <IO/WriteHelpers.h>
#include <IO/WriteBufferValidUTF8.h>
#include <Processors/Formats/Impl/JSONRowOutputFormat.h>
#include <Formats/FormatFactory.h>
#include <Formats/JSONUtils.h>
namespace DB
{
JSONRowOutputFormat::JSONRowOutputFormat(
WriteBuffer & out_,
const Block & header,
const FormatSettings & settings_,
bool yield_strings_)
: RowOutputFormatWithExceptionHandlerAdaptor<RowOutputFormatWithUTF8ValidationAdaptor, bool>(header, out_, settings_.json.valid_output_on_exception, true), settings(settings_), yield_strings(yield_strings_)
{
names = JSONUtils::makeNamesValidJSONStrings(header.getNames(), settings, true);
ostr = RowOutputFormatWithExceptionHandlerAdaptor::getWriteBufferPtr();
}
void JSONRowOutputFormat::writePrefix()
{
JSONUtils::writeObjectStart(*ostr);
JSONUtils::writeMetadata(names, types, settings, *ostr);
JSONUtils::writeFieldDelimiter(*ostr, 2);
JSONUtils::writeArrayStart(*ostr, 1, "data");
}
void JSONRowOutputFormat::writeField(const IColumn & column, const ISerialization & serialization, size_t row_num)
{
JSONUtils::writeFieldFromColumn(column, serialization, row_num, yield_strings, settings, *ostr, names[field_number], 3);
++field_number;
}
void JSONRowOutputFormat::writeFieldDelimiter()
{
JSONUtils::writeFieldDelimiter(*ostr);
}
void JSONRowOutputFormat::writeRowStartDelimiter()
{
JSONUtils::writeObjectStart(*ostr, 2);
}
void JSONRowOutputFormat::writeRowEndDelimiter()
{
JSONUtils::writeObjectEnd(*ostr, 2);
field_number = 0;
++row_count;
}
void JSONRowOutputFormat::writeRowBetweenDelimiter()
{
JSONUtils::writeFieldDelimiter(*ostr);
}
void JSONRowOutputFormat::writeSuffix()
{
JSONUtils::writeArrayEnd(*ostr, 1);
}
void JSONRowOutputFormat::writeBeforeTotals()
{
JSONUtils::writeFieldDelimiter(*ostr, 2);
JSONUtils::writeObjectStart(*ostr, 1, "totals");
}
void JSONRowOutputFormat::writeTotals(const Columns & columns, size_t row_num)
{
JSONUtils::writeColumns(columns, names, serializations, row_num, yield_strings, settings, *ostr, 2);
}
void JSONRowOutputFormat::writeAfterTotals()
{
JSONUtils::writeObjectEnd(*ostr, 1);
}
void JSONRowOutputFormat::writeBeforeExtremes()
{
JSONUtils::writeFieldDelimiter(*ostr, 2);
JSONUtils::writeObjectStart(*ostr, 1, "extremes");
}
void JSONRowOutputFormat::writeExtremesElement(const char * title, const Columns & columns, size_t row_num)
{
JSONUtils::writeObjectStart(*ostr, 2, title);
JSONUtils::writeColumns(columns, names, serializations, row_num, yield_strings, settings, *ostr, 3);
JSONUtils::writeObjectEnd(*ostr, 2);
}
void JSONRowOutputFormat::writeMinExtreme(const Columns & columns, size_t row_num)
{
writeExtremesElement("min", columns, row_num);
}
void JSONRowOutputFormat::writeMaxExtreme(const Columns & columns, size_t row_num)
{
writeExtremesElement("max", columns, row_num);
}
void JSONRowOutputFormat::writeAfterExtremes()
{
JSONUtils::writeObjectEnd(*ostr, 1);
}
void JSONRowOutputFormat::finalizeImpl()
{
JSONUtils::writeAdditionalInfo(
row_count,
statistics.rows_before_limit,
statistics.applied_limit,
statistics.watch,
statistics.progress,
settings.write_statistics && exception_message.empty(),
*ostr);
if (!exception_message.empty())
{
writeCString(",\n\n", *ostr);
JSONUtils::writeException(exception_message, *ostr, settings, 1);
}
JSONUtils::writeObjectEnd(*ostr);
writeChar('\n', *ostr);
ostr->next();
}
void JSONRowOutputFormat::resetFormatterImpl()
{
RowOutputFormatWithExceptionHandlerAdaptor::resetFormatterImpl();
ostr = RowOutputFormatWithExceptionHandlerAdaptor::getWriteBufferPtr();
row_count = 0;
statistics = Statistics();
}
void JSONRowOutputFormat::onProgress(const Progress & value)
{
statistics.progress.incrementPiecewiseAtomically(value);
}
void registerOutputFormatJSON(FormatFactory & factory)
{
factory.registerOutputFormat("JSON", [](
WriteBuffer & buf,
const Block & sample,
const FormatSettings & format_settings)
{
return std::make_shared<JSONRowOutputFormat>(buf, sample, format_settings, false);
});
factory.markOutputFormatSupportsParallelFormatting("JSON");
factory.markFormatHasNoAppendSupport("JSON");
factory.registerOutputFormat("JSONStrings", [](
WriteBuffer & buf,
const Block & sample,
const FormatSettings & format_settings)
{
return std::make_shared<JSONRowOutputFormat>(buf, sample, format_settings, true);
});
factory.markOutputFormatSupportsParallelFormatting("JSONStrings");
factory.markFormatHasNoAppendSupport("JSONStrings");
}
}
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