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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.
+ */
+
+#pragma once
+
+#include <vector>
+
+#include "mongo/base/status_with.h"
+#include "mongo/bson/bsonobj.h"
+#include "mongo/db/namespace_string.h"
+
+namespace mongo {
+
+class AggregationRequest;
+
+/**
+ * Represents a resolved definition, composed of a base collection namespace and a pipeline
+ * built from one or more views.
+ */
+class ResolvedView {
+public:
+ ResolvedView(const NamespaceString& collectionNs, const std::vector<BSONObj>& pipeline)
+ : _namespace(std::move(collectionNs)), _pipeline(std::move(pipeline)) {}
+
+ /**
+ * Returns whether 'commandResponseObj' contains a CommandOnShardedViewNotSupportedOnMongod
+ * error and resolved view definition.
+ */
+ static bool isResolvedViewErrorResponse(BSONObj commandResponseObj);
+
+ static ResolvedView fromBSON(BSONObj commandResponseObj);
+
+ /**
+ * Convert an aggregation command on a view to the equivalent command against the views
+ * underlying collection.
+ */
+ StatusWith<BSONObj> asExpandedViewAggregation(const BSONObj& aggCommand) const;
+ StatusWith<BSONObj> asExpandedViewAggregation(const AggregationRequest& aggRequest) const;
+
+ const NamespaceString& getNamespace() const {
+ return _namespace;
+ }
+
+ const std::vector<BSONObj>& getPipeline() const {
+ return _pipeline;
+ }
+
+private:
+ NamespaceString _namespace;
+ std::vector<BSONObj> _pipeline;
+};
+
+} // namespace mongo