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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 "handle.h"
#include "matchdata.h"
namespace search::fef {
/**
* This class is used to describe the layout of term match data and
* features within MatchData objects for a single query.
**/
class MatchDataLayout
{
private:
std::vector<uint32_t> _fieldIds;
public:
/**
* Create an empty object.
**/
MatchDataLayout();
MatchDataLayout(MatchDataLayout &&) noexcept = default;
MatchDataLayout & operator=(MatchDataLayout &&) noexcept = default;
MatchDataLayout(const MatchDataLayout &) = default;
MatchDataLayout & operator=(const MatchDataLayout &) = delete;
~MatchDataLayout();
/**
* Allocate space for a term field match data structure.
*
* @param fieldId the field ID the space will be used for
* @return handle to be used with match data objects
**/
TermFieldHandle allocTermField(uint32_t fieldId) {
_fieldIds.push_back(fieldId);
return _fieldIds.size() - 1;
}
void reserve(size_t sz) { _fieldIds.reserve(sz); }
/**
* Create a match data object with the layout described by this
* object. Note that this method should only be invoked after all
* terms and features have been allocated.
*
* @return auto-pointer to a match data object
**/
MatchData::UP createMatchData() const;
};
}
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