parameter level extension

Hello,

I have a API, I want to provide the extensions to the @RequestBody MultipleMdsEntity body.

but here, the body Object has in turn two Object types as mentioned belwo.

For each of these two properties in MultipleMdsEntity, I need to have different values say

For User as below

@Extension(properties = {
@ExtensionProperty(name = "x-datasourceType", value = "MDS"),
@ExtensionProperty(name = "x-uniqueIdentifier", value = "users")
})

and For Supplier as below

@Extension(properties = {
@ExtensionProperty(name = "x-datasourceType", value = "MDS"),
@ExtensionProperty(name = "x-uniqueIdentifier", value = "suppliers")
})

my question is where / how do I provide these extensions.?

@ApiOperation(value = "input mappings( user & supplier) output mapping ( user & supplier) - single select ",
        extensions = {
                @Extension(properties = {
                        @ExtensionProperty(name = "x-datasourceType", value = "MDS"),
                        @ExtensionProperty(name = "x-uniqueIdentifier", value = "users")
                })
        })
@ApiResponses(value = {
        @ApiResponse(code = 200, message = "Successfully gets Rating"),
        @ApiResponse(code = 401, message = "If user is not authorized"),
        @ApiResponse(code = 500, message = "Internal server error, if unable get Rating"),
})
@RequestMapping(method = RequestMethod.POST,
        value = "/v1/multiple-entities/operation1",
        produces = MediaType.APPLICATION_JSON_VALUE)
public ResponseEntity<MultipleMdsEntity> mockOperation(@RequestBody MultipleMdsEntity body) {

    return new ResponseEntity<>(body, HttpStatus.OK);
}

class MultipleMdsEntity{

    private User user;
    private Supplier supplier;

}

class User{

    String uniqueName;
    String passwordAdapter;
}

class Supplier{

String uniqueName;
}