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Alex Rivera
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I'm writing a generic Dao interface and I have encountered some problems. I have the following generic Entity interface public interface Entity<T> { T getId(); //more code } So the generic parameter is supposed to represent the id of the entity. And now I want to write a generic Dao initerface like this public interface Dao<T extends Entity<E>> { //more code T find(E id); } To be able to call T find(E id) Instead of having to call T find(Object id) which isn't typesafe. Unfortunately the compiler doesn't seem to be able to resolve the E in Dao<T extends Entity<E>> Do any of you know if there is a workaround to this problem, or is it just impossible to do in Java?
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