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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "fuzzy_term.h"
namespace search::streaming {
namespace {
constexpr bool normalizing_implies_cased(Normalizing norm) noexcept {
return (norm == Normalizing::NONE);
}
}
FuzzyTerm::FuzzyTerm(std::unique_ptr<QueryNodeResultBase> result_base, stringref term,
const string& index, Type type, Normalizing normalizing,
uint8_t max_edits, uint32_t prefix_size)
: QueryTerm(std::move(result_base), term, index, type, normalizing),
_dfa_matcher(),
_fallback_matcher()
{
setFuzzyMaxEditDistance(max_edits);
setFuzzyPrefixLength(prefix_size);
std::string_view term_view(term.data(), term.size());
const bool cased = normalizing_implies_cased(normalizing);
if (attribute::DfaFuzzyMatcher::supports_max_edits(max_edits)) {
_dfa_matcher = std::make_unique<attribute::DfaFuzzyMatcher>(term_view, max_edits, prefix_size, cased);
} else {
_fallback_matcher = std::make_unique<vespalib::FuzzyMatcher>(term_view, max_edits, prefix_size, cased);
}
}
FuzzyTerm::~FuzzyTerm() = default;
bool FuzzyTerm::is_match(std::string_view term) const {
if (_dfa_matcher) {
return _dfa_matcher->is_match(term);
} else {
return _fallback_matcher->isMatch(term);
}
}
}
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