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89 lines
2.4 KiB
C++
89 lines
2.4 KiB
C++
#pragma once
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#include <Interpreters/IExternalLoadable.h>
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#include <Columns/IColumn.h>
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#include <Columns/ColumnsNumber.h>
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namespace DB
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{
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/// CatBoost wrapper interface functions.
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struct CatBoostWrapperAPI;
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class CatBoostWrapperAPIProvider
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{
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public:
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virtual ~CatBoostWrapperAPIProvider() = default;
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virtual const CatBoostWrapperAPI & getAPI() const = 0;
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};
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/// CatBoost model interface.
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class ICatBoostModel
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{
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public:
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virtual ~ICatBoostModel() = default;
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/// Evaluate model. Use first `float_features_count` columns as float features,
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/// the others `cat_features_count` as categorical features.
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virtual ColumnPtr evaluate(const ColumnRawPtrs & columns) const = 0;
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virtual size_t getFloatFeaturesCount() const = 0;
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virtual size_t getCatFeaturesCount() const = 0;
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virtual size_t getTreeCount() const = 0;
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};
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class IDataType;
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using DataTypePtr = std::shared_ptr<const IDataType>;
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/// General ML model evaluator interface.
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class IModel : public IExternalLoadable
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{
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public:
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virtual ColumnPtr evaluate(const ColumnRawPtrs & columns) const = 0;
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virtual std::string getTypeName() const = 0;
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virtual DataTypePtr getReturnType() const = 0;
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};
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class CatBoostModel : public IModel
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{
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public:
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CatBoostModel(std::string name, std::string model_path,
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std::string lib_path, const ExternalLoadableLifetime & lifetime);
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ColumnPtr evaluate(const ColumnRawPtrs & columns) const override;
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std::string getTypeName() const override { return "catboost"; }
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size_t getFloatFeaturesCount() const;
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size_t getCatFeaturesCount() const;
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size_t getTreeCount() const;
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DataTypePtr getReturnType() const override;
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/// IExternalLoadable interface.
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const ExternalLoadableLifetime & getLifetime() const override;
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const std::string & getLoadableName() const override { return name; }
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bool supportUpdates() const override { return true; }
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bool isModified() const override;
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std::shared_ptr<const IExternalLoadable> clone() const override;
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private:
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const std::string name;
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std::string model_path;
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std::string lib_path;
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ExternalLoadableLifetime lifetime;
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std::shared_ptr<CatBoostWrapperAPIProvider> api_provider;
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const CatBoostWrapperAPI * api;
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std::unique_ptr<ICatBoostModel> model;
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size_t float_features_count;
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size_t cat_features_count;
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size_t tree_count;
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void init();
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};
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}
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