class DomainObject...
private Long ID;
public Long getlDO {
    return ID;
}
public void setID(Long ID) {
    Assert.notNull("Cannot set a null ID", ID);
public void setID(Long ID) {
    Assert.notNull("Cannot set a null ID", ID);
    this.ID =ID;
}
public DomainObject(Long ID) (
    this.ID = ID;
public DomainObject(){
}