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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 <vespa/vespalib/stllike/string.h>
#include <iosfwd>
namespace search {
enum class Normalizing : uint8_t {
NONE,
LOWERCASE,
LOWERCASE_AND_FOLD
};
enum class TermType : uint8_t {
WORD = 0,
PREFIXTERM = 1,
SUBSTRINGTERM = 2,
EXACTSTRINGTERM = 3,
SUFFIXTERM = 4,
REGEXP = 5,
GEO_LOCATION = 6,
FUZZYTERM = 7,
NEAREST_NEIGHBOR = 8
};
std::ostream &operator<<(std::ostream &, Normalizing);
/**
* Resolves what kind of normalization that is needed for the query terms in context
* of the fields searched. It also provides a utility method for doing the normalization.
*/
class QueryNormalization {
public:
using Normalizing = search::Normalizing;
virtual ~QueryNormalization() = default;
virtual bool is_text_matching(vespalib::stringref index) const noexcept = 0;
virtual Normalizing normalizing_mode(vespalib::stringref index) const noexcept = 0;
static vespalib::string optional_fold(vespalib::stringref s, TermType type, Normalizing normalizing);
};
}
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