Reduce xml deser size with empty object (#4565)

* chore(codegen): reduce XML deser size by not defining empty object

We don't need to define the entire object up front and can instead
just add values to the result if they are present. This has the
net effect of -14k lines of generated code across XML services.

* chore(codegen): generate XML deserializers

---------

Co-authored-by: Michael Dowling <[email protected]>

clients/client-sqs/src/protocols/Aws_query.ts

@@ -2170,12 +2170,7 @@ const deserializeAws_queryBatchRequestTooLong = (output: any, context: __SerdeCo
 };
 
 const deserializeAws_queryBatchResultErrorEntry = (output: any, context: __SerdeContext): BatchResultErrorEntry => {
-  const contents: any = {
-    Id: undefined,
-    SenderFault: undefined,
-    Code: undefined,
-    Message: undefined,
-  };
+  const contents: any = {};
   if (output["Id"] !== undefined) {
     contents.Id = __expectString(output["Id"]);
   }
@@ -2214,10 +2209,7 @@ const deserializeAws_queryChangeMessageVisibilityBatchResult = (
   output: any,
   context: __SerdeContext
 ): ChangeMessageVisibilityBatchResult => {
-  const contents: any = {
-    Successful: undefined,
-    Failed: undefined,
-  };
+  const contents: any = {};
   if (output.ChangeMessageVisibilityBatchResultEntry === "") {
     contents.Successful = [];
   } else if (output["ChangeMessageVisibilityBatchResultEntry"] !== undefined) {
@@ -2241,9 +2233,7 @@ const deserializeAws_queryChangeMessageVisibilityBatchResultEntry = (
   output: any,
   context: __SerdeContext
 ): ChangeMessageVisibilityBatchResultEntry => {
-  const contents: any = {
-    Id: undefined,
-  };
+  const contents: any = {};
   if (output["Id"] !== undefined) {
     contents.Id = __expectString(output["Id"]);
   }
@@ -2262,9 +2252,7 @@ const deserializeAws_queryChangeMessageVisibilityBatchResultEntryList = (
 };
 
 const deserializeAws_queryCreateQueueResult = (output: any, context: __SerdeContext): CreateQueueResult => {
-  const contents: any = {
-    QueueUrl: undefined,
-  };
+  const contents: any = {};
   if (output["QueueUrl"] !== undefined) {
     contents.QueueUrl = __expectString(output["QueueUrl"]);
   }
@@ -2275,10 +2263,7 @@ const deserializeAws_queryDeleteMessageBatchResult = (
   output: any,
   context: __SerdeContext
 ): DeleteMessageBatchResult => {
-  const contents: any = {
-    Successful: undefined,
-    Failed: undefined,
-  };
+  const contents: any = {};
   if (output.DeleteMessageBatchResultEntry === "") {
     contents.Successful = [];
   } else if (output["DeleteMessageBatchResultEntry"] !== undefined) {
@@ -2302,9 +2287,7 @@ const deserializeAws_queryDeleteMessageBatchResultEntry = (
   output: any,
   context: __SerdeContext
 ): DeleteMessageBatchResultEntry => {
-  const contents: any = {
-    Id: undefined,
-  };
+  const contents: any = {};
   if (output["Id"] !== undefined) {
     contents.Id = __expectString(output["Id"]);
   }
@@ -2331,9 +2314,7 @@ const deserializeAws_queryGetQueueAttributesResult = (
   output: any,
   context: __SerdeContext
 ): GetQueueAttributesResult => {
-  const contents: any = {
-    Attributes: undefined,
-  };
+  const contents: any = {};
   if (output.Attribute === "") {
     contents.Attributes = {};
   } else if (output["Attribute"] !== undefined) {
@@ -2343,9 +2324,7 @@ const deserializeAws_queryGetQueueAttributesResult = (
 };
 
 const deserializeAws_queryGetQueueUrlResult = (output: any, context: __SerdeContext): GetQueueUrlResult => {
-  const contents: any = {
-    QueueUrl: undefined,
-  };
+  const contents: any = {};
   if (output["QueueUrl"] !== undefined) {
     contents.QueueUrl = __expectString(output["QueueUrl"]);
   }
@@ -2376,10 +2355,7 @@ const deserializeAws_queryListDeadLetterSourceQueuesResult = (
   output: any,
   context: __SerdeContext
 ): ListDeadLetterSourceQueuesResult => {
-  const contents: any = {
-    queueUrls: undefined,
-    NextToken: undefined,
-  };
+  const contents: any = {};
   if (output.QueueUrl === "") {
     contents.queueUrls = [];
   } else if (output["QueueUrl"] !== undefined) {
@@ -2392,10 +2368,7 @@ const deserializeAws_queryListDeadLetterSourceQueuesResult = (
 };
 
 const deserializeAws_queryListQueuesResult = (output: any, context: __SerdeContext): ListQueuesResult => {
-  const contents: any = {
-    NextToken: undefined,
-    QueueUrls: undefined,
-  };
+  const contents: any = {};
   if (output["NextToken"] !== undefined) {
     contents.NextToken = __expectString(output["NextToken"]);
   }
@@ -2408,9 +2381,7 @@ const deserializeAws_queryListQueuesResult = (output: any, context: __SerdeConte
 };
 
 const deserializeAws_queryListQueueTagsResult = (output: any, context: __SerdeContext): ListQueueTagsResult => {
-  const contents: any = {
-    Tags: undefined,
-  };
+  const contents: any = {};
   if (output.Tag === "") {
     contents.Tags = {};
   } else if (output["Tag"] !== undefined) {
@@ -2420,15 +2391,7 @@ const deserializeAws_queryListQueueTagsResult = (output: any, context: __SerdeCo
 };
 
 const deserializeAws_queryMessage = (output: any, context: __SerdeContext): Message => {
-  const contents: any = {
-    MessageId: undefined,
-    ReceiptHandle: undefined,
-    MD5OfBody: undefined,
-    Body: undefined,
-    Attributes: undefined,
-    MD5OfMessageAttributes: undefined,
-    MessageAttributes: undefined,
-  };
+  const contents: any = {};
   if (output["MessageId"] !== undefined) {
     contents.MessageId = __expectString(output["MessageId"]);
   }
@@ -2464,13 +2427,7 @@ const deserializeAws_queryMessage = (output: any, context: __SerdeContext): Mess
 };
 
 const deserializeAws_queryMessageAttributeValue = (output: any, context: __SerdeContext): MessageAttributeValue => {
-  const contents: any = {
-    StringValue: undefined,
-    BinaryValue: undefined,
-    StringListValues: undefined,
-    BinaryListValues: undefined,
-    DataType: undefined,
-  };
+  const contents: any = {};
   if (output["StringValue"] !== undefined) {
     contents.StringValue = __expectString(output["StringValue"]);
   }
@@ -2587,9 +2544,7 @@ const deserializeAws_queryReceiptHandleIsInvalid = (output: any, context: __Serd
 };
 
 const deserializeAws_queryReceiveMessageResult = (output: any, context: __SerdeContext): ReceiveMessageResult => {
-  const contents: any = {
-    Messages: undefined,
-  };
+  const contents: any = {};
   if (output.Message === "") {
     contents.Messages = [];
   } else if (output["Message"] !== undefined) {
@@ -2599,10 +2554,7 @@ const deserializeAws_queryReceiveMessageResult = (output: any, context: __SerdeC
 };
 
 const deserializeAws_querySendMessageBatchResult = (output: any, context: __SerdeContext): SendMessageBatchResult => {
-  const contents: any = {
-    Successful: undefined,
-    Failed: undefined,
-  };
+  const contents: any = {};
   if (output.SendMessageBatchResultEntry === "") {
     contents.Successful = [];
   } else if (output["SendMessageBatchResultEntry"] !== undefined) {
@@ -2626,14 +2578,7 @@ const deserializeAws_querySendMessageBatchResultEntry = (
   output: any,
   context: __SerdeContext
 ): SendMessageBatchResultEntry => {
-  const contents: any = {
-    Id: undefined,
-    MessageId: undefined,
-    MD5OfMessageBody: undefined,
-    MD5OfMessageAttributes: undefined,
-    MD5OfMessageSystemAttributes: undefined,
-    SequenceNumber: undefined,
-  };
+  const contents: any = {};
   if (output["Id"] !== undefined) {
     contents.Id = __expectString(output["Id"]);
   }
@@ -2667,13 +2612,7 @@ const deserializeAws_querySendMessageBatchResultEntryList = (
 };
 
 const deserializeAws_querySendMessageResult = (output: any, context: __SerdeContext): SendMessageResult => {
-  const contents: any = {
-    MD5OfMessageBody: undefined,
-    MD5OfMessageAttributes: undefined,
-    MD5OfMessageSystemAttributes: undefined,
-    MessageId: undefined,
-    SequenceNumber: undefined,
-  };
+  const contents: any = {};
   if (output["MD5OfMessageBody"] !== undefined) {
     contents.MD5OfMessageBody = __expectString(output["MD5OfMessageBody"]);
   }