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// Copyright 2020 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_OPTIMIZATION_GUIDE_CORE_HINTS_OPTIMIZATION_METADATA_H_
#define COMPONENTS_OPTIMIZATION_GUIDE_CORE_HINTS_OPTIMIZATION_METADATA_H_
#include <optional>
#include "base/logging.h"
#include "components/optimization_guide/core/optimization_guide_util.h"
#include "components/optimization_guide/proto/hints.pb.h"
namespace optimization_guide {
// Contains metadata that could be attached to an optimization provided by the
// Optimization Guide.
class OptimizationMetadata {
public:
OptimizationMetadata();
OptimizationMetadata(const OptimizationMetadata&);
~OptimizationMetadata();
// Validates that the metadata stored in |any_metadata_| is of the same type
// and is parseable as |T|. Will return metadata if all checks pass.
template <class T>
requires(std::is_convertible_v<T*, google::protobuf::MessageLite*>)
std::optional<T> ParsedMetadata() const {
if (!any_metadata_) {
return std::nullopt;
}
return ParsedAnyMetadata<T>(*any_metadata_);
}
const std::optional<proto::Any>& any_metadata() const {
return any_metadata_;
}
void set_any_metadata(const proto::Any& any_metadata) {
any_metadata_ = any_metadata;
}
// Sets |any_metadata_| to be validly parsed as |metadata|. Should only be
// used for testing purposes.
void SetAnyMetadataForTesting(const google::protobuf::MessageLite& metadata);
const std::optional<proto::LoadingPredictorMetadata>&
loading_predictor_metadata() const {
return loading_predictor_metadata_;
}
void set_loading_predictor_metadata(
const proto::LoadingPredictorMetadata& loading_predictor_metadata) {
loading_predictor_metadata_ = loading_predictor_metadata;
}
// Returns true if |this| contains no metadata.
bool empty() const { return !any_metadata_ && !loading_predictor_metadata_; }
private:
// Metadata applicable to the optimization type.
//
// Optimization types that are not specifically specified below will have
// metadata populated with this field.
std::optional<proto::Any> any_metadata_;
// Only applicable for the LOADING_PREDICTOR optimization type.
std::optional<proto::LoadingPredictorMetadata> loading_predictor_metadata_;
};
} // namespace optimization_guide
#endif // COMPONENTS_OPTIMIZATION_GUIDE_CORE_HINTS_OPTIMIZATION_METADATA_H_
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