RoomWebService hash method is broken

Hello,

 

                                I have a problem with Room hash invitation in RoomWebService.

                                Given Service  : 

                                @Path(value="/hash")

                                public ServiceResult hash(@QueryParam(value="sid")

                                                      String sid,

                                                      @QueryParam(value="invite")

                                                      InvitationDTO invite,

                                                      @QueryParam(value="sendmail")

                                                      boolean sendmail)

                                I can generate following URL :

                                URL : /room/hash?sid=94bc68fa-a946-4b0d-a845-e959deeab317&invite=

{"firstname":"Mark","lastname":"Steven","email":"[abc@gmail.com|mailto:abc@gmail.com]","password":"Sys@123!","passwordProtected":true,"subject":"Health Meeting","roomId":"2","message":"Meeting","validFrom":"2018-03-19 02:25:12","validTo":"2018-04-20 02:25:12"}

&sendmail=true

                               

                                 parameter as bellow,

                                sid = 94bc68fa-a946-4b0d-a845-e959deeab317

                                invite =

{"firstname":"Mark","lastname":"Steven","email":"[abc@gmail.com|mailto:abc@gmail.com]","password":"Sys@123!","passwordProtected":true,"subject":"Health Meeting","roomId":"2","message":"Meeting","validFrom":"2018-03-19 02:25:12","validTo":"2018-04-20 02:25:12"}

                                sendmail = true

                               

                                 On Restlet it will give me 500 Error :

                                Parameter Class org.apache.openmeetings.db.dto.room.InvitationDTO has no constructor with single String parameter, static valueOf(String) or fromString(String) methods

                               

                                 So please suggest how to pass parameter in room hash webservice, Specifically  @QueryParam(value="invite")InvitationDTO invite. And How to genarate URL for this RoomWebService.