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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include <vespa/searchlib/fef/blueprint.h>
#include <optional>
namespace search::features {
/**
* Implements the blueprint for the closest executor.
*/
class ClosestBlueprint : public fef::Blueprint {
vespalib::string _field_name;
vespalib::eval::ValueType _field_tensor_type;
vespalib::eval::ValueType _output_tensor_type;
uint32_t _field_id;
std::optional<vespalib::string> _item_label;
std::unique_ptr<vespalib::eval::Value> _empty_output;
std::vector<char> _identity_space;
vespalib::eval::TypedCells _identity_cells;
public:
ClosestBlueprint();
~ClosestBlueprint() override;
void visitDumpFeatures(const fef::IIndexEnvironment & env, fef::IDumpFeatureVisitor & visitor) const override;
std::unique_ptr<fef::Blueprint> createInstance() const override;
fef::ParameterDescriptions getDescriptions() const override;
bool setup(const fef::IIndexEnvironment & env, const fef::ParameterList & params) override;
void prepareSharedState(const fef::IQueryEnvironment& env, fef::IObjectStore& store) const override;
fef::FeatureExecutor &createExecutor(const fef::IQueryEnvironment &env, vespalib::Stash &stash) const override;
};
}
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