public void addConstraint( final FieldConstraint constraint ) {
        if ( constraintList == null ) {
            constraintList = new CompositeFieldConstraint();
        }
        this.constraintList.addConstraint( constraint );
    }
public void addConstraint ( final FieldConstraint constraint ) { if ( constraintList == null ) { constraintList = new CompositeFieldConstraint ( ) ; } this . constraintList . addConstraint ( constraint ) ; }
This will add a top level constraint.