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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 "docsum_field_writer.h"
#include <memory>
#include <vector>
namespace search { class MatchingElementsFields; }
namespace search::attribute { class IAttributeContext; }
namespace search::docsummary {
/**
* Field writer that filters matched elements (according to the query) from a multi-value or complex field
* (array of primitive, weighted set of primitive, map of primitives, map of struct, array of struct)
* that is retrieved from the document store.
*/
class MatchedElementsFilterDFW : public DocsumFieldWriter {
private:
std::string _input_field_name;
std::shared_ptr<MatchingElementsFields> _matching_elems_fields;
const std::vector<uint32_t>& get_matching_elements(uint32_t docid, GetDocsumsState& state) const;
public:
MatchedElementsFilterDFW(const std::string& input_field_name,
std::shared_ptr<MatchingElementsFields> matching_elems_fields);
static std::unique_ptr<DocsumFieldWriter> create(const std::string& input_field_name,
std::shared_ptr<MatchingElementsFields> matching_elems_fields);
static std::unique_ptr<DocsumFieldWriter> create(const std::string& input_field_name,
search::attribute::IAttributeContext& attr_ctx,
std::shared_ptr<MatchingElementsFields> matching_elems_fields);
~MatchedElementsFilterDFW() override;
bool isGenerated() const override { return false; }
void insertField(uint32_t docid, const IDocsumStoreDocument* doc, GetDocsumsState& state,
vespalib::slime::Inserter& target) const override;
};
}
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