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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 "queryterm.h"
#include <vespa/searchlib/attribute/dfa_fuzzy_matcher.h>
#include <vespa/vespalib/fuzzy/fuzzy_matcher.h>
#include <memory>
#include <string_view>
namespace search::streaming {
/**
* Query term that matches candidate field terms that are within a query-specified
* maximum number of edits (add, delete or substitute a character), with case
* sensitivity controlled by the provided Normalizing mode.
*
* Optionally, terms may be prefixed-locked, which enforces field terms to have a
* particular prefix and where edits are only counted for the remaining term suffix.
*/
class FuzzyTerm : public QueryTerm {
std::unique_ptr<attribute::DfaFuzzyMatcher> _dfa_matcher;
std::unique_ptr<vespalib::FuzzyMatcher> _fallback_matcher;
public:
FuzzyTerm(std::unique_ptr<QueryNodeResultBase> result_base, stringref term,
const string& index, Type type, Normalizing normalizing,
uint8_t max_edits, uint32_t prefix_size);
~FuzzyTerm() override;
[[nodiscard]] FuzzyTerm* as_fuzzy_term() noexcept override { return this; }
[[nodiscard]] bool is_match(std::string_view term) const;
};
}
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