Springboot REST API payload transformation.

Use Case : Conversion of Spring-boot REST API payload from JSON to XML and vice - versa after responses received from downstream. In request : Spring boot REST API (application/json)----> JSON to XML --- > Dowstream REST API (application/xml) In response : Downstream REST XML -----> XML to JSON ----- > Spring boot REST API. In detail: A Spring boot RESTController service will trigger a downstream system using Spring RestTemplate as HTTP Client to handle the request and response inside spring boot application. The JSON to XML or XML to JSON schema conversion login should be generic.i.e Client will call Spring REST API with JSON data,there should be a logic that based on the operation requested XML Schema has to be build using XSD's. using JSON data. Because downstream XML schema was not same for all the REST calls based on the operation XML schema will change and we have to build that XML from the json data provided by the client. As the end downstream cannot understand JSON data except XML , so all the API call to downstream are in REST over XML. Blow Simple API's are required : GET :/api/v1/customers (application/JSON) -----> based on operation requested here XML has to build based on XSD by using data in JSON ------> POST:/api/v1/customer/ds (application/xml) NOTE: XML response by downstream system has to be converted to JSON and send back to the called API. POST:/api/v1/customers (application/JSON) -----> based on operation requested here XML has to build based on XSD by using data in JSON ------> POST:/api/v1/customer/ds (application/xml) NOTE: XML response by downstream system has to be converted to JSON and send back to the called API. GET :/api/v1/users(application/JSON) -----> based on operation requested here XML has to build based on XSD by using data in JSON ------> POST:/api/v1/users/ds (application/xml) NOTE: XML response by downstream system has to be converted to JSON and send back to the called API. GET:/api/v1/users(application/JSON) -----> based on operation requested here XML has to build based on XSD by using data in JSON ------> POST:/api/v1/users/ds (application/xml) NOTE: XML response by downstream system has to be converted to JSON and send back to the called API. So basically above mentioned API's with Unit Test cases was the requirement. Adherence to OOPS principles and the performant code was required. You can mock the stream response.