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#include <DataTypes/DataTypeString.h>
#include <DataTypes/DataTypeCustomGeo.h>
#include <Functions/FunctionFactory.h>
#include <Functions/FunctionHelpers.h>
#include <Functions/geometryConverters.h>
#include <Columns/ColumnString.h>
#include <string>
#include <memory>
namespace DB
{
namespace ErrorCodes
{
extern const int ILLEGAL_TYPE_OF_ARGUMENT;
}
template <class DataTypeName, class Geometry, class Serializer, class NameHolder>
class FunctionReadWKT : public IFunction
{
public:
explicit FunctionReadWKT() = default;
static constexpr const char * name = NameHolder::name;
String getName() const override
{
return name;
}
size_t getNumberOfArguments() const override
{
return 1;
}
bool isSuitableForShortCircuitArgumentsExecution(const DataTypesWithConstInfo & /*arguments*/) const override { return true; }
DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override
{
if (checkAndGetDataType<DataTypeString>(arguments[0].get()) == nullptr)
{
throw Exception(ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT, "First argument should be String");
}
return DataTypeFactory::instance().get(DataTypeName().getName());
}
ColumnPtr executeImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr & /*result_type*/, size_t input_rows_count) const override
{
const auto * column_string = checkAndGetColumn<ColumnString>(arguments[0].column.get());
Serializer serializer;
Geometry geometry;
for (size_t i = 0; i < input_rows_count; ++i)
{
const auto & str = column_string->getDataAt(i).toString();
boost::geometry::read_wkt(str, geometry);
serializer.add(geometry);
}
return serializer.finalize();
}
bool useDefaultImplementationForConstants() const override
{
return true;
}
static FunctionPtr create(ContextPtr)
{
return std::make_shared<FunctionReadWKT<DataTypeName, Geometry, Serializer, NameHolder>>();
}
};
struct ReadWKTPointNameHolder
{
static constexpr const char * name = "readWKTPoint";
};
struct ReadWKTRingNameHolder
{
static constexpr const char * name = "readWKTRing";
};
struct ReadWKTPolygonNameHolder
{
static constexpr const char * name = "readWKTPolygon";
};
struct ReadWKTMultiPolygonNameHolder
{
static constexpr const char * name = "readWKTMultiPolygon";
};
REGISTER_FUNCTION(ReadWKT)
{
factory.registerFunction<FunctionReadWKT<DataTypePointName, CartesianPoint, PointSerializer<CartesianPoint>, ReadWKTPointNameHolder>>();
factory.registerFunction<FunctionReadWKT<DataTypeRingName, CartesianRing, RingSerializer<CartesianPoint>, ReadWKTRingNameHolder>>();
factory.registerFunction<FunctionReadWKT<DataTypePolygonName, CartesianPolygon, PolygonSerializer<CartesianPoint>, ReadWKTPolygonNameHolder>>();
factory.registerFunction<FunctionReadWKT<DataTypeMultiPolygonName, CartesianMultiPolygon, MultiPolygonSerializer<CartesianPoint>, ReadWKTMultiPolygonNameHolder>>();
}
}
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