| // Copyright 2017 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_BINARY_CLASSIFIER_PREDICTOR_H_ |
| #define COMPONENTS_ASSIST_RANKER_BINARY_CLASSIFIER_PREDICTOR_H_ |
| |
| #include "base/compiler_specific.h" |
| #include "components/assist_ranker/base_predictor.h" |
| #include "components/assist_ranker/proto/ranker_example.pb.h" |
| |
| namespace base { |
| class FilePath; |
| } |
| |
| namespace network { |
| class SharedURLLoaderFactory; |
| } |
| |
| namespace assist_ranker { |
| |
| class GenericLogisticRegressionInference; |
| |
| // Predictor class for models that output a binary decision. |
| class BinaryClassifierPredictor : public BasePredictor { |
| public: |
| ~BinaryClassifierPredictor() 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. |
| static std::unique_ptr<BinaryClassifierPredictor> Create( |
| const PredictorConfig& config, |
| const base::FilePath& model_path, |
| scoped_refptr<network::SharedURLLoaderFactory> url_loader_factory) |
| WARN_UNUSED_RESULT; |
| |
| // Fills in a boolean decision given a RankerExample. Returns false if a |
| // prediction could not be made (e.g. the model is not loaded yet). |
| bool Predict(const RankerExample& example, |
| bool* prediction) WARN_UNUSED_RESULT; |
| |
| // Returns a score between 0 and 1. Returns false if a |
| // prediction could not be made (e.g. the model is not loaded yet). |
| bool PredictScore(const RankerExample& example, |
| float* prediction) WARN_UNUSED_RESULT; |
| |
| // Validates that the loaded RankerModel is a valid BinaryClassifier model. |
| static RankerModelStatus ValidateModel(const RankerModel& model); |
| |
| protected: |
| // Instatiates the inference module. |
| bool Initialize() override; |
| |
| private: |
| friend class BinaryClassifierPredictorTest; |
| BinaryClassifierPredictor(const PredictorConfig& config); |
| |
| // TODO(hamelphi): Use an abstract BinaryClassifierInferenceModule in order to |
| // generalize to other models. |
| std::unique_ptr<GenericLogisticRegressionInference> inference_module_; |
| |
| DISALLOW_COPY_AND_ASSIGN(BinaryClassifierPredictor); |
| }; |
| |
| } // namespace assist_ranker |
| #endif // COMPONENTS_ASSIST_RANKER_BINARY_CLASSIFIER_PREDICTOR_H_ |