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/**
* Copyright (C) 2016 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* 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 GNU Affero General 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/pipeline/expression_context.h"
#include "mongo/db/query/collation/collator_factory_interface.h"
namespace mongo {
using boost::intrusive_ptr;
ExpressionContext::ResolvedNamespace::ResolvedNamespace(NamespaceString ns,
std::vector<BSONObj> pipeline)
: ns(std::move(ns)), pipeline(std::move(pipeline)) {}
ExpressionContext::ExpressionContext(OperationContext* opCtx,
const AggregationRequest& request,
std::unique_ptr<CollatorInterface> collator,
StringMap<ResolvedNamespace> resolvedNamespaces)
: explain(request.getExplain()),
inShard(request.isFromRouter()),
extSortAllowed(request.shouldAllowDiskUse()),
bypassDocumentValidation(request.shouldBypassDocumentValidation()),
ns(request.getNamespaceString()),
opCtx(opCtx),
collation(request.getCollation()),
_collator(std::move(collator)),
_documentComparator(_collator.get()),
_valueComparator(_collator.get()),
_resolvedNamespaces(std::move(resolvedNamespaces)) {}
void ExpressionContext::checkForInterrupt() {
// This check could be expensive, at least in relative terms, so don't check every time.
if (--_interruptCounter == 0) {
opCtx->checkForInterrupt();
_interruptCounter = kInterruptCheckPeriod;
}
}
void ExpressionContext::setCollator(std::unique_ptr<CollatorInterface> coll) {
_collator = std::move(coll);
// Document/Value comparisons must be aware of the collation.
_documentComparator = DocumentComparator(_collator.get());
_valueComparator = ValueComparator(_collator.get());
}
intrusive_ptr<ExpressionContext> ExpressionContext::copyWith(NamespaceString ns) const {
intrusive_ptr<ExpressionContext> expCtx = new ExpressionContext();
expCtx->explain = explain;
expCtx->inShard = inShard;
expCtx->inRouter = inRouter;
expCtx->extSortAllowed = extSortAllowed;
expCtx->bypassDocumentValidation = bypassDocumentValidation;
expCtx->ns = std::move(ns);
expCtx->tempDir = tempDir;
expCtx->opCtx = opCtx;
expCtx->collation = collation;
if (_collator) {
expCtx->setCollator(_collator->clone());
}
expCtx->_resolvedNamespaces = _resolvedNamespaces;
// Note that we intentionally skip copying the value of '_interruptCounter' because 'expCtx' is
// intended to be used for executing a separate aggregation pipeline.
return expCtx;
}
} // namespace mongo
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