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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 "multisearch.h"
#include <vespa/vespalib/util/priority_queue.h>
#include <vespa/searchlib/fef/matchdata.h>
#include <vespa/searchlib/fef/termfieldmatchdataarray.h>
#include <vespa/searchlib/attribute/iterator_pack.h>
#include <memory>
#include <vector>
namespace search::fef { class TermFieldMatchData; }
namespace search::queryeval {
class Blueprint;
/**
* Search iterator for a weighted set, based on a set of child search
* iterators.
*/
class WeightedSetTermSearch : public SearchIterator
{
protected:
WeightedSetTermSearch() = default;
public:
// TODO: pass ownership with unique_ptr
static SearchIterator::UP create(const std::vector<SearchIterator *> &children,
search::fef::TermFieldMatchData &tmd,
bool field_is_filter,
const std::vector<int32_t> &weights,
fef::MatchData::UP match_data);
static SearchIterator::UP create(search::fef::TermFieldMatchData &tmd,
bool field_is_filter,
const std::vector<int32_t> &weights,
std::vector<DocumentWeightIterator> &&iterators);
// used during docsum fetching to identify matching elements
// initRange must be called before use.
// doSeek/doUnpack must not be called.
virtual void find_matching_elements(uint32_t docid, const std::vector<std::unique_ptr<Blueprint>> &child_blueprints, std::vector<uint32_t> &dst) = 0;
};
}
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