Request<Void> request = createRequest(bucketName, key, null);
request.addParameter("acl", null);
if (versionId != null) request.addParameter("versionId", versionId);
signRequest(request, HttpMethodName.GET, bucketName, key);
HttpRequest httpRequest = convertToHttpRequest(request, HttpMethodName.GET);
S3XmlResponseHandler<AccessControlList> responseHandler =
new S3XmlResponseHandler<AccessControlList>(new Unmarshallers.AccessControlListUnmarshaller());
return (AccessControlList)client.execute(httpRequest, responseHandler, errorResponseHandler);