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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#pragma once
#include <boost/optional.hpp>
#include "mongo/db/matcher/expression.h"
namespace mongo {
/**
* Common base class for $where match expression implementations.
*/
class WhereMatchExpressionBase : public MatchExpression {
public:
struct WhereParams {
std::string code;
};
explicit WhereMatchExpressionBase(WhereParams params);
size_t numChildren() const final {
return 0;
}
MatchExpression* getChild(size_t i) const final {
MONGO_UNREACHABLE;
}
boost::optional<std::vector<MatchExpression*>&> getChildVector() final {
return boost::none;
}
bool matchesSingleElement(const BSONElement& e, MatchDetails* details = nullptr) const final {
return false;
}
void debugString(StringBuilder& debug, int indentationLevel = 0) const final;
void serialize(BSONObjBuilder* out, bool includePath) const final;
bool equivalent(const MatchExpression* other) const final;
MatchCategory getCategory() const final {
return MatchCategory::kOther;
}
protected:
const std::string& getCode() const {
return _code;
}
private:
ExpressionOptimizerFunc getOptimizer() const final {
return [](std::unique_ptr<MatchExpression> expression) { return expression; };
}
const std::string _code;
};
} // namespace mongo
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