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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_SEGMENTATION_PLATFORM_INTERNAL_EXECUTION_PROCESSING_QUERY_PROCESSOR_H_
#define COMPONENTS_SEGMENTATION_PLATFORM_INTERNAL_EXECUTION_PROCESSING_QUERY_PROCESSOR_H_
#include <memory>
#include <vector>
#include "base/containers/flat_map.h"
#include "base/functional/callback.h"
#include "components/segmentation_platform/internal/database/ukm_types.h"
namespace segmentation_platform::processing {
class FeatureProcessorState;
struct Data;
// Interface that converts aribitrary data to a list of tensor in asynchronous
// callback, which can be fed into machine learning model as training data or
// inference data.
class QueryProcessor {
public:
// TODO(ssid): Remove these indirections and replace all uses with the global
// types.
using Tensor = segmentation_platform::processing::Tensor;
using IndexedTensors = segmentation_platform::processing::IndexedTensors;
using FeatureIndex = segmentation_platform::processing::FeatureIndex;
// TODO(haileywang): Maybe use a unique_ptr<> here.
using QueryProcessorCallback =
base::OnceCallback<void(std::unique_ptr<FeatureProcessorState>,
IndexedTensors)>;
// Processes the data and return the tensor values in |callback|.
virtual void Process(
std::unique_ptr<FeatureProcessorState> feature_processor_state,
QueryProcessorCallback callback) = 0;
// Disallow copy/assign.
QueryProcessor(const QueryProcessor&) = delete;
QueryProcessor& operator=(const QueryProcessor&) = delete;
virtual ~QueryProcessor() = default;
protected:
QueryProcessor() = default;
};
} // namespace segmentation_platform::processing
#endif // COMPONENTS_SEGMENTATION_PLATFORM_INTERNAL_EXECUTION_PROCESSING_QUERY_PROCESSOR_H_
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