// Copyright 2018 The Chromium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #ifndef COMPONENTS_ASSIST_RANKER_CLASSIFIER_PREDICTOR_H_ #define COMPONENTS_ASSIST_RANKER_CLASSIFIER_PREDICTOR_H_ #include #include #include "components/assist_ranker/base_predictor.h" #include "components/assist_ranker/nn_classifier.h" #include "components/assist_ranker/proto/ranker_example.pb.h" namespace base { class FilePath; } namespace network { class SharedURLLoaderFactory; } namespace assist_ranker { // Predictor class for single-layer neural network models. class ClassifierPredictor : public BasePredictor { public: ClassifierPredictor(const ClassifierPredictor&) = delete; ClassifierPredictor& operator=(const ClassifierPredictor&) = delete; ~ClassifierPredictor() override; // Returns an new predictor instance with the given |config| and initialize // its model loader. The |request_context getter| is passed to the // predictor's model_loader which holds it as scoped_refptr. [[nodiscard]] static std::unique_ptr Create( const PredictorConfig& config, const base::FilePath& model_path, scoped_refptr url_loader_factory); // Performs inferencing on the specified RankerExample. The example is first // preprocessed using the model config. Returns false if a prediction could // not be made (e.g. the model is not loaded yet). [[nodiscard]] bool Predict(RankerExample example, std::vector* prediction); // Performs inferencing on the specified feature vector. Returns false if // a prediction could not be made. [[nodiscard]] bool Predict(const std::vector& features, std::vector* prediction); // Validates that the loaded RankerModel is a valid BinaryClassifier model. static RankerModelStatus ValidateModel(const RankerModel& model); protected: // Instantiates the inference module. bool Initialize() override; private: friend class ClassifierPredictorTest; ClassifierPredictor(const PredictorConfig& config); NNClassifierModel model_; }; } // namespace assist_ranker #endif // COMPONENTS_ASSIST_RANKER_CLASSIFIER_PREDICTOR_H_