1 files changed, 58 insertions, 0 deletions
diff --git a/src/mongo/db/pipeline/document_source_add_fields.cpp b/src/mongo/db/pipeline/document_source_add_fields.cpp
new file mode 100644
index 00000000000..9e893e4cb7b
--- /dev/null
+++ b/src/mongo/db/pipeline/document_source_add_fields.cpp
@@ -0,0 +1,58 @@
+/**
+ * Copyright 2016 (c) 10gen 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/document_source.h"
+
+#include <boost/optional.hpp>
+#include <boost/smart_ptr/intrusive_ptr.hpp>
+
+#include "mongo/db/pipeline/parsed_add_fields.h"
+
+namespace mongo {
+
+using boost::intrusive_ptr;
+using parsed_aggregation_projection::ParsedAddFields;
+
+REGISTER_DOCUMENT_SOURCE_ALIAS(addFields, DocumentSourceAddFields::createFromBson);
+
+std::vector<intrusive_ptr<DocumentSource>> DocumentSourceAddFields::createFromBson(
+    BSONElement elem, const intrusive_ptr<ExpressionContext>& expCtx) {
+
+    // Confirm that the stage was called with an object.
+    uassert(40269,
+            str::stream() << "$addFields specification stage must be an object, got "
+                          << typeName(elem.type()),
+            elem.type() == Object);
+
+    // Create the AddFields aggregation stage.
+    return {new DocumentSourceSingleDocumentTransformation(
+        expCtx, ParsedAddFields::create(elem.Obj()), "$addFields")};
+};
+}