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#include <Processors/Formats/Impl/JSONCompactRowInputFormat.h>
#include <Formats/JSONUtils.h>
#include <Formats/FormatFactory.h>
namespace DB
{
namespace ErrorCodes
{
extern const int INCORRECT_DATA;
}
JSONCompactRowInputFormat::JSONCompactRowInputFormat(
const Block & header_, ReadBuffer & in_, Params params_, const FormatSettings & format_settings_)
: RowInputFormatWithNamesAndTypes(
header_, in_, params_, false, false, false, format_settings_, std::make_unique<JSONCompactFormatReader>(in_, format_settings_))
, validate_types_from_metadata(format_settings_.json.validate_types_from_metadata)
{
}
void JSONCompactRowInputFormat::readPrefix()
{
skipBOMIfExists(*in);
JSONUtils::skipObjectStart(*in);
if (validate_types_from_metadata)
{
auto names_and_types = JSONUtils::readMetadataAndValidateHeader(*in, getPort().getHeader());
Names column_names;
for (const auto & [name, type] : names_and_types)
column_names.push_back(name);
column_mapping->addColumns(column_names, column_indexes_by_names, format_settings);
}
else
{
JSONUtils::readMetadata(*in);
column_mapping->setupByHeader(getPort().getHeader());
}
JSONUtils::skipComma(*in);
if (!JSONUtils::skipUntilFieldInObject(*in, "data"))
throw Exception(ErrorCodes::INCORRECT_DATA, "Expected field \"data\" with table content");
JSONUtils::skipArrayStart(*in);
}
void JSONCompactRowInputFormat::readSuffix()
{
/// Array end was skipped in JSONCompactFormatReader::checkForSuffix
JSONUtils::skipTheRestOfObject(*in);
}
void JSONCompactRowInputFormat::syncAfterError()
{
skipToUnescapedNextLineOrEOF(*in);
}
JSONCompactFormatReader::JSONCompactFormatReader(ReadBuffer & in_, const FormatSettings & format_settings_)
: JSONCompactEachRowFormatReader(in_, false, format_settings_)
{
}
bool JSONCompactFormatReader::checkForSuffix()
{
return JSONUtils::checkAndSkipArrayEnd(*in);
}
void registerInputFormatJSONCompact(FormatFactory & factory)
{
factory.registerInputFormat("JSONCompact", [](
ReadBuffer & buf,
const Block & sample,
IRowInputFormat::Params params,
const FormatSettings & settings)
{
return std::make_shared<JSONCompactRowInputFormat>(sample, buf, std::move(params), settings);
});
factory.markFormatSupportsSubsetOfColumns("JSONCompact");
}
}
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