A middleware is an application used to map and pipe outputs and inputs of differentheterogeneous applications to stick them together to enable them to share data back andforth. A client-side web application often reads and stores data in a server of backend Enterprise Resource Planning (ERP) system using a middleware.However, the current practice for building middleware is specific to each clientapplication such that the middleware needs to be updated each time when an interface in aclient side or a server side is changed. In addition, the middleware tends to be complex,and needs frequent maintenance.Accordingly, there exists a need for a generic middleware that can work with anyweb application to any data server without the need of updating the middleware in case ofan interface change, and that can be easily maintained without a frequent maintenance.