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#include <Processors/Formats/Impl/JSONColumnsWithMetadataBlockInputFormat.h>
#include <IO/ReadHelpers.h>
#include <Formats/FormatFactory.h>
#include <Formats/EscapingRuleUtils.h>
#include <Formats/JSONUtils.h>
namespace DB
{
namespace ErrorCodes
{
extern const int INCORRECT_DATA;
}
JSONColumnsWithMetadataReader::JSONColumnsWithMetadataReader(ReadBuffer & in_, const Block & header_, const FormatSettings & settings)
: JSONColumnsReader(in_), header(header_), validate_types_from_metadata(settings.json.validate_types_from_metadata)
{
}
void JSONColumnsWithMetadataReader::readChunkStart()
{
skipBOMIfExists(*in);
JSONUtils::skipObjectStart(*in);
if (validate_types_from_metadata)
JSONUtils::readMetadataAndValidateHeader(*in, header);
else
JSONUtils::readMetadata(*in);
JSONUtils::skipComma(*in);
if (!JSONUtils::skipUntilFieldInObject(*in, "data"))
throw Exception(ErrorCodes::INCORRECT_DATA, "Expected field \"data\" with table content");
JSONUtils::skipObjectStart(*in);
}
bool JSONColumnsWithMetadataReader::checkChunkEnd()
{
if (!JSONUtils::checkAndSkipObjectEnd(*in))
return false;
JSONUtils::skipTheRestOfObject(*in);
assertEOF(*in);
return true;
}
JSONColumnsWithMetadataSchemaReader::JSONColumnsWithMetadataSchemaReader(ReadBuffer & in_) : ISchemaReader(in_)
{
}
NamesAndTypesList JSONColumnsWithMetadataSchemaReader::readSchema()
{
skipBOMIfExists(in);
JSONUtils::skipObjectStart(in);
return JSONUtils::readMetadata(in);
}
void registerInputFormatJSONColumnsWithMetadata(FormatFactory & factory)
{
factory.registerInputFormat(
"JSONColumnsWithMetadata",
[](ReadBuffer & buf,
const Block &sample,
const RowInputFormatParams &,
const FormatSettings & settings)
{
return std::make_shared<JSONColumnsBlockInputFormatBase>(buf, sample, settings, std::make_unique<JSONColumnsWithMetadataReader>(buf, sample, settings));
}
);
factory.markFormatSupportsSubsetOfColumns("JSONColumnsWithMetadata");
}
void registerJSONColumnsWithMetadataSchemaReader(FormatFactory & factory)
{
factory.registerSchemaReader(
"JSONColumnsWithMetadata",
[](ReadBuffer & buf, const FormatSettings &)
{
return std::make_shared<JSONColumnsWithMetadataSchemaReader>(buf);
}
);
}
}
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