fix(client-s3): use member xmlname if applicable

clients/client-s3/protocols/Aws_restXml.ts

@@ -518,6 +518,7 @@ export const serializeAws_restXmlCompleteMultipartUploadCommand = async (
   let contents: any;
   if (input.MultipartUpload !== undefined) {
     contents = serializeAws_restXmlCompletedMultipartUpload(input.MultipartUpload, context);
+    contents = contents.withName("CompleteMultipartUpload");
     body = '<?xml version="1.0" encoding="UTF-8"?>';
     contents.addAttribute("xmlns", "http://s3.amazonaws.com/doc/2006-03-01/");
     body += contents.toString();
@@ -3493,6 +3494,7 @@ export const serializeAws_restXmlPutBucketLifecycleConfigurationCommand = async
   let contents: any;
   if (input.LifecycleConfiguration !== undefined) {
     contents = serializeAws_restXmlBucketLifecycleConfiguration(input.LifecycleConfiguration, context);
+    contents = contents.withName("LifecycleConfiguration");
     body = '<?xml version="1.0" encoding="UTF-8"?>';
     contents.addAttribute("xmlns", "http://s3.amazonaws.com/doc/2006-03-01/");
     body += contents.toString();
@@ -4228,6 +4230,7 @@ export const serializeAws_restXmlPutObjectLegalHoldCommand = async (
   let contents: any;
   if (input.LegalHold !== undefined) {
     contents = serializeAws_restXmlObjectLockLegalHold(input.LegalHold, context);
+    contents = contents.withName("LegalHold");
     body = '<?xml version="1.0" encoding="UTF-8"?>';
     contents.addAttribute("xmlns", "http://s3.amazonaws.com/doc/2006-03-01/");
     body += contents.toString();
@@ -4346,6 +4349,7 @@ export const serializeAws_restXmlPutObjectRetentionCommand = async (
   let contents: any;
   if (input.Retention !== undefined) {
     contents = serializeAws_restXmlObjectLockRetention(input.Retention, context);
+    contents = contents.withName("Retention");
     body = '<?xml version="1.0" encoding="UTF-8"?>';
     contents.addAttribute("xmlns", "http://s3.amazonaws.com/doc/2006-03-01/");
     body += contents.toString();

codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsRestXml.java

@@ -272,6 +272,16 @@ private void serializePayload(
             writer.write("contents = $L;",
                     getInputValue(context, Location.PAYLOAD, "input." + memberName, member, target));
 
+            String targetName = target.getTrait(XmlNameTrait.class)
+                            .map(XmlNameTrait::getValue)
+                            .orElse(target.getId().getName());
+            if (
+                member.hasTrait(XmlNameTrait.class)
+                && !member.getTrait(XmlNameTrait.class).get().getValue().equals(targetName)
+            ) {
+                writer.write("contents = contents.withName($S);", member.getTrait(XmlNameTrait.class).get().getValue());
+            }
+
             // XmlNode will serialize Structure and non-streaming Union payloads as XML documents.
             if (target instanceof StructureShape
                     || (target instanceof UnionShape && !target.hasTrait(StreamingTrait.class))

protocol_tests/aws-restxml/protocols/Aws_restXml.ts

@@ -656,6 +656,7 @@ export const serializeAws_restXmlHttpPayloadWithMemberXmlNameCommand = async (
   let contents: any;
   if (input.nested !== undefined) {
     contents = serializeAws_restXmlPayloadWithXmlName(input.nested, context);
+    contents = contents.withName("Hola");
     body = '<?xml version="1.0" encoding="UTF-8"?>';
     body += contents.toString();
   }