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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 <vespa/vespalib/stllike/string.h>
#include <vector>
namespace search {
namespace attribute { class IAttributeContext; }
class MatchingElementsFields;
}
namespace search::docsummary {
/**
* Class used to resolve which struct sub fields a complex field consists of,
* based on which attribute vectors are present.
*/
class StructFieldsResolver {
private:
using StringVector = std::vector<vespalib::string>;
vespalib::string _field_name;
vespalib::string _map_key_attribute;
StringVector _map_value_fields;
StringVector _map_value_attributes;
StringVector _array_fields;
StringVector _array_attributes;
bool _has_map_key;
bool _has_map_value;
bool _error;
public:
StructFieldsResolver(const vespalib::string& field_name, const search::attribute::IAttributeContext& attr_ctx,
bool require_all_struct_fields_as_attributes);
~StructFieldsResolver();
bool is_map_of_scalar() const { return (_has_map_key &&
_has_map_value &&
(_array_fields.size() == 2u) &&
_map_value_fields.empty());
}
bool is_map_of_struct() const { return !_map_value_fields.empty(); }
const vespalib::string& get_map_key_attribute() const { return _map_key_attribute; }
const StringVector& get_map_value_fields() const { return _map_value_fields; }
const StringVector& get_map_value_attributes() const { return _map_value_attributes; }
const StringVector& get_array_fields() const { return _array_fields; }
const StringVector& get_array_attributes() const { return _array_attributes; }
bool has_error() const { return _error; }
void apply_to(MatchingElementsFields& fields) const;
};
}
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