generics - Java Compile time parameter interdependency -

i'm designing event driven system sends events data queue. listener on queue dispatches messages via javax.enterprise.event, have methods listening these events via observerving qualifiers. system behaves i'd expect i'm missing compile-time type validation. basic code can found below:

public interface ieventsender {     void send(final servereventtypeenum servereventtypeenum, final ieventdata eventdata); }   public class observingclientclass{     public void eventaprocessservice(@observes @ieventtypequalifier(event_1) servereventmessage servereventmessage) {         //handle event, cast data concrete implementation x         (x) servereventmessage.geteventdata()     } }  public enum servereventtypeenum implements ieventtypeenum {     event_1,     event_2 }  public interface ieventdata extends serializable{ }   public class x implements ieventdata { } public class y implements ieventdata { } 

• the servereventtypeenum enum types of events support.

• the eventdata generic interface actual eventdata classes implement.

• the servereventmessage wrapper class contains eventdata , other data not relevant problem.

the problem eventtypeenum 1, observering qualifiers expects concrete implementation of type x , eventypeenum 2 expect eventdata of concrete type y. @ moment observing clients cast ieventdata concrete class.

this means when i'm sending eventdata messages queue, have check client code expects receive, risk of classcastexception @ runtime. i'm wondering if there's way, maybe generics, can use define expected implementation type in send method.

i want specify relation between eventtype , concrete implementations in enum itself. have change in 'send' method compiletime type validation? example of want enum:

public enum servereventtypeenum implements ieventtypeenum {     event_1(x.class),     event_2(y.class);      private servereventtypeenum(class concreteimplementationoftheeventdata) {     //set fields...     } } 

technology:

• java se 8
• java ee 7

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