@Override public int hashCode() { final int prime = 31; int result = 1; result = prime * result + ((id == null) ? 0 : id.hashCode()); result = prime * result + ((firstName == null) ? 0 : firstName.hashCode()); result = prime * result + ((lastName == null) ? 0 : lastName.hashCode()); result = prime * result + ((birthdate == null) ? 0 : birthdate.hashCode()); result = prime * result + ((active == null) ? 0 : active.hashCode()); result = prime * result + ((role == null) ? 0 : role.hashCode()); result = prime * result + ((email == null) ? 0 : email.hashCode()); return result; }