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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/views/resolved_view.h"
#include "mongo/bson/bsonobjbuilder.h"
#include "mongo/db/pipeline/aggregation_request.h"
#include "mongo/rpc/get_status_from_command_result.h"
namespace mongo {
bool ResolvedView::isResolvedViewErrorResponse(BSONObj commandResponseObj) {
auto status = getStatusFromCommandResult(commandResponseObj);
return ErrorCodes::CommandOnShardedViewNotSupportedOnMongod == status;
}
ResolvedView ResolvedView::fromBSON(BSONObj commandResponseObj) {
uassert(40248,
"command response expected to have a 'resolvedView' field",
commandResponseObj.hasField("resolvedView"));
auto viewDef = commandResponseObj.getObjectField("resolvedView");
uassert(40249, "resolvedView must be an object", !viewDef.isEmpty());
uassert(40250,
"View definition must have 'ns' field of type string",
viewDef.hasField("ns") && viewDef.getField("ns").type() == BSONType::String);
uassert(40251,
"View definition must have 'pipeline' field of type array",
viewDef.hasField("pipeline") && viewDef.getField("pipeline").type() == BSONType::Array);
std::vector<BSONObj> pipeline;
for (auto&& item : viewDef["pipeline"].Obj()) {
pipeline.push_back(item.Obj().getOwned());
}
return {ResolvedView(NamespaceString(viewDef["ns"].valueStringData()), pipeline)};
}
StatusWith<BSONObj> ResolvedView::asExpandedViewAggregation(
const AggregationRequest& request) const {
BSONObjBuilder aggregationBuilder;
// Perform the aggregation on the resolved namespace.
aggregationBuilder.append("aggregate", _namespace.coll());
// The new pipeline consists of two parts: first, 'pipeline' in this ResolvedView;
// then, the pipeline in 'request'.
BSONArrayBuilder pipelineBuilder(aggregationBuilder.subarrayStart("pipeline"));
for (auto&& item : _pipeline) {
pipelineBuilder.append(item);
}
for (auto&& item : request.getPipeline()) {
pipelineBuilder.append(item);
}
pipelineBuilder.doneFast();
// The cursor option is always specified regardless of the presence of batchSize.
if (request.getBatchSize()) {
BSONObjBuilder batchSizeBuilder(aggregationBuilder.subobjStart("cursor"));
batchSizeBuilder.append(AggregationRequest::kBatchSizeName, *request.getBatchSize());
batchSizeBuilder.doneFast();
} else {
aggregationBuilder.append("cursor", BSONObj());
}
if (request.isExplain()) {
aggregationBuilder.append("explain", true);
}
if (request.shouldBypassDocumentValidation()) {
aggregationBuilder.append("bypassDocumentValidation", true);
}
if (request.shouldAllowDiskUse()) {
aggregationBuilder.append("allowDiskUse", true);
}
return aggregationBuilder.obj();
}
StatusWith<BSONObj> ResolvedView::asExpandedViewAggregation(const BSONObj& aggCommand) const {
auto aggRequest = AggregationRequest::parseFromBSON(_namespace, aggCommand);
if (!aggRequest.isOK()) {
return aggRequest.getStatus();
}
return asExpandedViewAggregation(aggRequest.getValue());
}
} // namespace mongo
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