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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 <vector>
#include <cstdint>
#include <memory>
#include <vespa/searchlib/attribute/i_document_weight_attribute.h>
namespace search { class MatchingElements; }
namespace search::attribute { class IAttributeVector; }
namespace vespalib { template <typename> class ConstArrayRef; }
namespace vespalib::datastore { class EntryRef; }
namespace search::queryeval {
/*
* Class used to find matching elements to limit what is returned in dynamic
* summaries for summary fields where matched-elements-only is set.
*/
class MatchingElementsSearch {
protected:
std::vector<uint32_t> _matching_elements;
public:
MatchingElementsSearch();
virtual ~MatchingElementsSearch();
virtual void find_matching_elements(uint32_t doc_id, MatchingElements& result) = 0;
virtual void initRange(uint32_t begin_id, uint32_t end_id) = 0;
static std::unique_ptr<MatchingElementsSearch> create(const search::attribute::IAttributeVector &attr, vespalib::datastore::EntryRef dictionary_snapshot, vespalib::ConstArrayRef<IDocumentWeightAttribute::LookupResult> dict_entries);
};
}
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