DataSupplier – interface, through which the datasources refer to Middleware for loading and saving entities. The standard implementation simply delegates to DataManager. A screen can define its implementation of the DataSupplier in dataSupplier attribute of the window element.

A reference to DataSupplier can be obtained either by injection into a screen controller or through the DsContext or Datasource instances. In both cases, an own implementation is returned if defined for the screen.