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https://github.com/ClickHouse/ClickHouse.git
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109 lines
2.9 KiB
C++
109 lines
2.9 KiB
C++
#include <DataTypes/DataTypeString.h>
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#include <Functions/FunctionFactory.h>
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#include <Functions/FunctionHelpers.h>
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#include <Functions/geometryConverters.h>
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#include <Columns/ColumnString.h>
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#include <string>
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#include <memory>
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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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extern const int NUMBER_OF_ARGUMENTS_DOESNT_MATCH;
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}
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namespace
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{
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class FunctionSvg : public IFunction
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{
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public:
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static inline const char * name = "svg";
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explicit FunctionSvg() = default;
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static FunctionPtr create(ContextPtr)
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{
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return std::make_shared<FunctionSvg>();
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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 true;
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}
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size_t getNumberOfArguments() const override
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{
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return 2;
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}
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bool isSuitableForShortCircuitArgumentsExecution(const DataTypesWithConstInfo & /*arguments*/) const override { return true; }
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DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override
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{
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if (arguments.empty() || arguments.size() > 2)
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{
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throw Exception(ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH, "Incorrect number of arguments: expected 1 or 2 arguments");
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}
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else if (arguments.size() == 2 && checkAndGetDataType<DataTypeString>(arguments[1].get()) == nullptr)
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{
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throw Exception(ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT, "Second argument should be String");
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}
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return std::make_shared<DataTypeString>();
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}
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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 = ColumnString::create();
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bool has_style = arguments.size() > 1;
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ColumnPtr style;
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if (has_style)
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style = arguments[1].column;
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callOnGeometryDataType<CartesianPoint>(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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auto figures = Converter::convert(arguments[0].column->convertToFullColumnIfConst());
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for (size_t i = 0; i < input_rows_count; ++i)
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{
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std::stringstream str; // STYLE_CHECK_ALLOW_STD_STRING_STREAM
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boost::geometry::correct(figures[i]);
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str << boost::geometry::svg(figures[i], has_style ? style->getDataAt(i).toString() : "");
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std::string serialized = str.str();
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res_column->insertData(serialized.c_str(), serialized.size());
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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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}
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REGISTER_FUNCTION(Svg)
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{
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factory.registerFunction<FunctionSvg>();
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factory.registerAlias("SVG", "svg");
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}
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}
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