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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 "query.h"
namespace search::streaming {
/**
N-ary Near operator. All terms must be within the given distance.
*/
class NearQueryNode : public AndQueryNode
{
protected:
template <bool ordered>
bool evaluate_helper() const;
public:
NearQueryNode() noexcept : AndQueryNode("NEAR"), _distance(0) { }
explicit NearQueryNode(const char * opName) noexcept : AndQueryNode(opName), _distance(0) { }
bool evaluate() override;
void distance(size_t dist) { _distance = dist; }
size_t distance() const { return _distance; }
void visitMembers(vespalib::ObjectVisitor &visitor) const override;
bool isFlattenable(ParseItem::ItemType) const override { return false; }
private:
size_t _distance;
};
}
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