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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "featureexecutor.h"
namespace search::fef {
/**
* A FeatureResolver knowns the name and memory location of values
* calculated by a RankProgram. Note that objects of this class will
* reference data owned by the RankProgram used to create it.
**/
class FeatureResolver
{
private:
std::vector<vespalib::string> _names;
std::vector<LazyValue> _features;
std::vector<bool> _is_object;
public:
FeatureResolver(size_t size_hint);
~FeatureResolver();
void add(const vespalib::string &name, LazyValue feature, bool is_object) {
_names.push_back(name);
_features.push_back(feature);
_is_object.push_back(is_object);
}
size_t num_features() const { return _names.size(); }
const vespalib::string &name_of(size_t i) const { return _names[i]; }
bool is_object(size_t i) const { return _is_object[i]; }
LazyValue resolve(size_t i) const { return _features[i]; }
};
}
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