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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 <cstdint>
namespace search::queryeval {
/**
* Interface for getting global information stored in underlying posting list
* used by a search iterator.
*
* Subclasses of this interface will expose different information that can be
* used during evaluation.
*/
struct PostingInfo {
virtual ~PostingInfo() { }
};
/**
* Class for getting the min and max weights of a posting list.
*
* Such posting lists store a weight with each doc id and maintain the min and
* max weights among the whole posting list.
*/
class MinMaxPostingInfo : public PostingInfo {
private:
int32_t _minWeight;
int32_t _maxWeight;
public:
MinMaxPostingInfo(int32_t minWeight, int32_t maxWeight) noexcept
: PostingInfo(),
_minWeight(minWeight),
_maxWeight(maxWeight)
{}
~MinMaxPostingInfo() override;
int32_t getMinWeight() const { return _minWeight; }
int32_t getMaxWeight() const { return _maxWeight; }
};
}
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