Serialize RawBsonArray and RawBsonDocument more efficiently when embedded in another BsonArray or BsonDocument.

Author: rstam

MongoDB.Bson/Serialization/Serializers/BsonArraySerializer.cs

@@ -113,6 +113,13 @@ public override void Serialize(
                 throw new ArgumentNullException("value");
             }
 
+            var rawBsonArray = value as RawBsonArray;
+            if (rawBsonArray != null)
+            {
+                RawBsonArraySerializer.Instance.Serialize(bsonWriter, nominalType, value, options);
+                return;
+            }
+
             var array = (BsonArray)value;
             bsonWriter.WriteStartArray();
             for (int i = 0; i < array.Count; i++)

MongoDB.Bson/Serialization/Serializers/BsonDocumentSerializer.cs

@@ -179,6 +179,13 @@ public override void Serialize(
                 return;
             }
 
+            var rawBsonDocument = value as RawBsonDocument;
+            if (rawBsonDocument != null)
+            {
+                RawBsonDocumentSerializer.Instance.Serialize(bsonWriter, nominalType, value, options);
+                return;
+            }
+
             var bsonDocument = (BsonDocument)value;
             var documentSerializationOptions = (options ?? DocumentSerializationOptions.Defaults) as DocumentSerializationOptions;
             if (documentSerializationOptions == null)

MongoDB.Bson/Serialization/Serializers/RawBsonArraySerializer.cs

@@ -24,6 +24,18 @@ namespace MongoDB.Bson.Serialization.Serializers
     /// </summary>
     public class RawBsonArraySerializer : BsonBaseSerializer
     {
+        // private static fields
+        private static readonly RawBsonArraySerializer __instance = new RawBsonArraySerializer();
+
+        // public static properties
+        /// <summary>
+        /// Gets an instance of the RawBsonArraySerializer class.
+        /// </summary>
+        public static RawBsonArraySerializer Instance
+        {
+            get { return __instance; }
+        }
+
         // public methods
         /// <summary>
         /// Deserializes an object from a BsonReader.

MongoDB.Bson/Serialization/Serializers/RawBsonDocumentSerializer.cs

@@ -24,6 +24,18 @@ namespace MongoDB.Bson.Serialization.Serializers
     /// </summary>
     public class RawBsonDocumentSerializer : BsonBaseSerializer
     {
+        // private static fields
+        private static readonly RawBsonDocumentSerializer __instance = new RawBsonDocumentSerializer();
+
+        // public static properties
+        /// <summary>
+        /// Gets an instance of the RawBsonDocumentSerializer class.
+        /// </summary>
+        public static RawBsonDocumentSerializer Instance
+        {
+            get { return __instance; }
+        }
+
         // public methods
         /// <summary>
         /// Deserializes an object from a BsonReader.