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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 "mongo/db/matcher/expression_tree.h"
namespace mongo {
/**
* MatchExpression for $_internalSchemaXor keyword. Returns true only if exactly
* one of its child nodes matches.
*/
class InternalSchemaXorMatchExpression final : public ListOfMatchExpression {
public:
static constexpr StringData kName = "$_internalSchemaXor"_sd;
InternalSchemaXorMatchExpression() : ListOfMatchExpression(INTERNAL_SCHEMA_XOR) {}
bool matches(const MatchableDocument* doc, MatchDetails* details = nullptr) const final;
bool matchesSingleElement(const BSONElement&, MatchDetails* details = nullptr) const final;
virtual std::unique_ptr<MatchExpression> shallowClone() const {
auto xorCopy = stdx::make_unique<InternalSchemaXorMatchExpression>();
for (size_t i = 0; i < numChildren(); ++i) {
xorCopy->add(getChild(i)->shallowClone().release());
}
if (getTag()) {
xorCopy->setTag(getTag()->clone());
}
return std::move(xorCopy);
}
void debugString(StringBuilder& debug, int level = 0) const final;
void serialize(BSONObjBuilder* out) const final;
};
} // namespace mongo
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