How to return Varchar2(1) from function ?? Simple but annoying :(

Hi,
I have a function something like...
CREATE OR REPLACE FUNCTION Test ( id number) RETURN VARCHAR2 ...
Now I am using this function in a View as ...
select
test(123) as Test
In the View description, this column appears as Varchar 4000. whereas I want it as varchar2(1).
When i redefine the function return value
CREATE OR REPLACE FUNCTION Test (id1 number) RETURN VARCHAR2(1) ...
It gives error...
Please suggest.
Thanks in Advance.

SQL> CREATE OR REPLACE FUNCTION Test ( id number) RETURN VARCHAR2
2 as
3 begin
4    return 'A';
5 end;
6 /
Functie is aangemaakt.
SQL> create view v_test as select test(123) as test from dual
2 /
View is aangemaakt.
SQL> desc v_test
Naam                                                                      Null?    Type
TEST                                                                               VARCHAR2(4000)
SQL> create or replace view v_test as select cast(test(123) as varchar2(1)) as test from dual
2 /
View is aangemaakt.
SQL> desc v_test
Naam                                                                      Null?    Type
TEST                                                                               VARCHAR2(1)Regards,
Rob.

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package mu.gcc.dms.view.bean.backing;
import com.sun.java.util.collections.ArrayList;
import com.sun.java.util.collections.HashMap;
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