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111 lines
3.0 KiB
C++
111 lines
3.0 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 TOO_MANY_ARGUMENTS_FOR_FUNCTION;
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extern const int TOO_FEW_ARGUMENTS_FOR_FUNCTION;
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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() {}
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static FunctionPtr create(const Context &)
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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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DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override
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{
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if (arguments.size() > 2)
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{
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throw Exception("Too many arguments", ErrorCodes::TOO_MANY_ARGUMENTS_FOR_FUNCTION);
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}
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else if (arguments.empty())
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{
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throw Exception("Too few arguments", ErrorCodes::TOO_FEW_ARGUMENTS_FOR_FUNCTION);
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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("Second argument should be String",
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ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
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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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const auto * const_col = checkAndGetColumn<ColumnConst>(arguments[0].column.get());
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auto parser = const_col ?
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makeGeometryFromColumnParser<CartesianPoint>(ColumnWithTypeAndName(const_col->getDataColumnPtr(), arguments[0].type, arguments[0].name)) :
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makeGeometryFromColumnParser<CartesianPoint>(arguments[0]);
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bool geo_column_is_const = static_cast<bool>(const_col);
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auto res_column = ColumnString::create();
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auto container = createContainer(parser);
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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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for (size_t i = 0; i < input_rows_count; i++)
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{
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/// FIXME
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std::stringstream str; // STYLE_CHECK_ALLOW_STD_STRING_STREAM
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if (!geo_column_is_const || i == 0)
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get(parser, container, i);
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str << boost::geometry::svg(container, 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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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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void registerFunctionSvg(FunctionFactory & factory)
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{
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factory.registerFunction<FunctionSvg>();
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}
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}
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