Using cursors on BD Java edition

Question

(I changed the question becaus it wasn't clear)
I need to do a search in my database, but I don't have the key, I just have some data. Let me explain:
@Entity
class MyEntity {
@PrimaryKey(sequence="ID")
long id;
private String name;
private String surname;
private String birthDate; // format "MM/DD/AAAA" "12/31/2000"
Supose I want to find users by surname, (I don't have the key id).
How can I do it???
I know using cursors I can pass the key and data. For example If I bind the data setting the surname to a String,
doing:
do {
     next = cursor.getNext(key, data, LockMode.DEFAULT);
     MyEntity entry = dataBinding.entryToObject(data);
     System.out.println(entry);
} while (next == OperationStatus.SUCCESS);
the cursor goes through all data. It doesn't begin on the surname I posted...

Answer 1

Could you be more specific, perhaps with a concrete example? We're not sure what you are asking.
Thanks,
Linda