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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.
*/
#include "mongo/platform/basic.h"
#include "mongo/db/update/pullall_node.h"
#include "mongo/bson/bsonobjbuilder.h"
#include "mongo/db/query/collation/collator_interface.h"
namespace mongo {
class PullAllNode::SetMatcher final : public ArrayCullingNode::ElementMatcher {
public:
SetMatcher(std::vector<BSONElement> elementsToMatch, const CollatorInterface* collator)
: _elementsToMatch(std::move(elementsToMatch)), _collator(collator) {}
std::unique_ptr<ElementMatcher> clone() const final {
return std::make_unique<SetMatcher>(*this);
}
bool match(const mutablebson::ConstElement& element) final {
return std::any_of(_elementsToMatch.begin(),
_elementsToMatch.end(),
[&element, collator{_collator} ](const auto& elementToMatch) {
return element.compareWithBSONElement(
elementToMatch, collator, false) == 0;
});
}
void setCollator(const CollatorInterface* collator) final {
_collator = collator;
}
private:
BSONObj value() const final {
BSONObjBuilder bob;
{
BSONArrayBuilder subarrayBuilder(bob.subarrayStart(""));
for (const auto element : _elementsToMatch)
subarrayBuilder << element;
}
return bob.obj();
}
std::vector<BSONElement> _elementsToMatch;
const CollatorInterface* _collator;
};
Status PullAllNode::init(BSONElement modExpr,
const boost::intrusive_ptr<ExpressionContext>& expCtx) {
invariant(modExpr.ok());
if (modExpr.type() != Array) {
return Status(ErrorCodes::BadValue,
str::stream() << "$pullAll requires an array argument but was given a "
<< typeName(modExpr.type()));
}
_matcher = std::make_unique<SetMatcher>(modExpr.Array(), expCtx->getCollator());
return Status::OK();
}
} // namespace mongo
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