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115 lines
2.9 KiB
C++
115 lines
2.9 KiB
C++
#include <Functions/FunctionFactory.h>
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#include <Functions/geometryConverters.h>
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#include <boost/geometry.hpp>
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#include <boost/geometry/geometries/point_xy.hpp>
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#include <boost/geometry/geometries/polygon.hpp>
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#include <Common/logger_useful.h>
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#include <Columns/ColumnArray.h>
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#include <Columns/ColumnTuple.h>
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#include <Columns/ColumnsNumber.h>
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#include <DataTypes/DataTypeArray.h>
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#include <DataTypes/DataTypeTuple.h>
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#include <DataTypes/DataTypeCustomGeo.h>
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#include <DataTypes/DataTypesNumber.h>
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#include <memory>
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#include <string>
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int ILLEGAL_TYPE_OF_ARGUMENT;
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}
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namespace
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{
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template <typename Point>
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class FunctionPolygonArea : public IFunction
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{
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public:
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static inline const char * name;
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explicit FunctionPolygonArea() = default;
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static FunctionPtr create(ContextPtr)
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{
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return std::make_shared<FunctionPolygonArea>();
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}
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String getName() const override
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{
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return name;
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}
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bool isVariadic() const override
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{
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return false;
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}
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size_t getNumberOfArguments() const override
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{
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return 1;
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}
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DataTypePtr getReturnTypeImpl(const DataTypes &) const override
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{
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return std::make_shared<DataTypeFloat64>();
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}
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bool isSuitableForShortCircuitArgumentsExecution(const DataTypesWithConstInfo & /*arguments*/) const override { return true; }
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ColumnPtr executeImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr & /*result_type*/, size_t input_rows_count) const override
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{
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auto res_column = ColumnFloat64::create();
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auto & res_data = res_column->getData();
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res_data.reserve(input_rows_count);
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callOnGeometryDataType<Point>(arguments[0].type, [&] (const auto & type)
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{
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using TypeConverter = std::decay_t<decltype(type)>;
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using Converter = typename TypeConverter::Type;
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if constexpr (std::is_same_v<ColumnToPointsConverter<Point>, Converter>)
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throw Exception(ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT, "The argument of function {} must not be Point", getName());
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else
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{
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auto geometries = Converter::convert(arguments[0].column->convertToFullColumnIfConst());
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for (size_t i = 0; i < input_rows_count; ++i)
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res_data.emplace_back(boost::geometry::area(geometries[i]));
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}
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}
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);
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return res_column;
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}
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bool useDefaultImplementationForConstants() const override
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{
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return true;
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}
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};
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template <>
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const char * FunctionPolygonArea<CartesianPoint>::name = "polygonAreaCartesian";
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template <>
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const char * FunctionPolygonArea<SphericalPoint>::name = "polygonAreaSpherical";
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}
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REGISTER_FUNCTION(PolygonArea)
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{
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factory.registerFunction<FunctionPolygonArea<CartesianPoint>>();
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factory.registerFunction<FunctionPolygonArea<SphericalPoint>>();
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}
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}
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