Add DownloadResponse mapping

generator/.DevConfigs/7f23582e-3225-487b-83e7-167cf17cb231.json

@@ -0,0 +1,11 @@
+{
+  "services": [
+    {
+      "serviceName": "S3",
+      "type": "patch",
+      "changeLogMessages": [
+        "Add GetObjectResponse to TransferUtilityDownloadResponse mapping."
+      ]
+    }
+  ]
+}

sdk/src/Services/S3/Custom/Transfer/Internal/ResponseMapper.cs

@@ -20,6 +20,7 @@
  *
  */
 
+using System.Collections.Generic;
 using Amazon.S3.Model;
 
 namespace Amazon.S3.Transfer.Internal
@@ -160,6 +161,125 @@ internal static TransferUtilityUploadResponse MapCompleteMultipartUploadResponse
 
             return response;
         }
+
+        /// <summary>
+        /// Maps a GetObjectResponse to TransferUtilityDownloadResponse.
+        /// Uses the field mappings defined in mapping.json "Conversion" -> "GetObjectResponse" -> "DownloadResponse".
+        /// </summary>
+        /// <param name="source">The GetObjectResponse to map from</param>
+        /// <returns>A new TransferUtilityDownloadResponse with mapped fields</returns>
+        internal static TransferUtilityDownloadResponse MapGetObjectResponse(GetObjectResponse source)
+        {
+            if (source == null)
+                return null;
+
+            var response = new TransferUtilityDownloadResponse();
+
+            // Map all fields as defined in mapping.json "Conversion" -> "GetObjectResponse" -> "DownloadResponse"
+            if (source.IsSetAcceptRanges())
+                response.AcceptRanges = source.AcceptRanges;
+
+            if (source.IsSetBucketKeyEnabled())
+                response.BucketKeyEnabled = source.BucketKeyEnabled.GetValueOrDefault();
+
+            if (source.IsSetChecksumCRC32())
+                response.ChecksumCRC32 = source.ChecksumCRC32;
+
+            if (source.IsSetChecksumCRC32C())
+                response.ChecksumCRC32C = source.ChecksumCRC32C;
+
+            if (source.IsSetChecksumCRC64NVME())
+                response.ChecksumCRC64NVME = source.ChecksumCRC64NVME;
+
+            if (source.IsSetChecksumSHA1())
+                response.ChecksumSHA1 = source.ChecksumSHA1;
+
+            if (source.IsSetChecksumSHA256())
+                response.ChecksumSHA256 = source.ChecksumSHA256;
+
+            if (source.IsSetChecksumType())
+                response.ChecksumType = source.ChecksumType;
+
+            if (source.IsSetContentRange())
+                response.ContentRange = source.ContentRange;
+
+            response.Headers = source.Headers;
+
+            if (source.IsSetDeleteMarker())
+                response.DeleteMarker = source.DeleteMarker;
+
+            if (source.IsSetETag())
+                response.ETag = source.ETag;
+
+            if (source.Expiration != null)
+                response.Expiration = source.Expiration;
+
+            if (source.ExpiresString != null)
+                response.ExpiresString = source.ExpiresString;
+
+            if (source.IsSetLastModified())
+                response.LastModified = source.LastModified;
+
+            if (source.Metadata != null)
+                response.Metadata = source.Metadata;
+
+            if (source.IsSetMissingMeta())
+                response.MissingMeta = source.MissingMeta;
+
+            if (source.IsSetObjectLockLegalHoldStatus())
+                response.ObjectLockLegalHoldStatus = source.ObjectLockLegalHoldStatus;
+
+            if (source.IsSetObjectLockMode())
+                response.ObjectLockMode = source.ObjectLockMode;
+
+            if (source.IsSetObjectLockRetainUntilDate())
+                response.ObjectLockRetainUntilDate = source.ObjectLockRetainUntilDate;
+
+            if (source.IsSetPartsCount())
+                response.PartsCount = source.PartsCount;
+
+            if (source.IsSetReplicationStatus())
+                response.ReplicationStatus = source.ReplicationStatus;
+
+            if (source.IsSetRequestCharged())
+                response.RequestCharged = source.RequestCharged;
+
+            if (source.RestoreExpiration.HasValue)
+                response.RestoreExpiration = source.RestoreExpiration;
+
+            if (source.RestoreInProgress.HasValue)
+                response.RestoreInProgress = source.RestoreInProgress;
+
+            if (source.ServerSideEncryptionCustomerMethod != null)
+                response.ServerSideEncryptionCustomerMethod = source.ServerSideEncryptionCustomerMethod;
+
+            if (source.ServerSideEncryptionCustomerProvidedKeyMD5 != null)
+                response.ServerSideEncryptionCustomerProvidedKeyMD5 = source.ServerSideEncryptionCustomerProvidedKeyMD5;
+
+            if (source.IsSetServerSideEncryptionKeyManagementServiceKeyId())
+                response.ServerSideEncryptionKeyManagementServiceKeyId = source.ServerSideEncryptionKeyManagementServiceKeyId;
+
+            if (source.IsSetServerSideEncryptionMethod())
+                response.ServerSideEncryptionMethod = source.ServerSideEncryptionMethod;
+
+            if (source.IsSetStorageClass())
+                response.StorageClass = source.StorageClass;
+
+            response.TagCount = source.TagCount;
+
+            if (source.IsSetVersionId())
+                response.VersionId = source.VersionId;
+
+            if (source.IsSetWebsiteRedirectLocation())
+                response.WebsiteRedirectLocation = source.WebsiteRedirectLocation;
+
+            // Copy response metadata
+            response.ResponseMetadata = source.ResponseMetadata;
+            response.ContentLength = source.ContentLength;
+            response.HttpStatusCode = source.HttpStatusCode;
+
+            return response;
+        }
 
     }
 }