simple question

[bw...@netcourrier.com]

Hi everybody,

I have a simple question :
is it possible to define one tag attributes which can accept 2 types of parameters : Ex String or Object[].
So to do this, i'll try to define 2 setters method:
	setMyAttribute(String str){...}
  and   setMyAttribute(Object[] objectArray){...} 

but i'm running into errors, so i would like to know if it's possible and if someone has already done that or not..

Many thanks
Gaetan

----------------------------------------------------------------------
NetCourrier, votre bureau virtuel sur Internet : Mail, Agenda, Clubs, Toolbar...
Web/Wap : www.netcourrier.com
Téléphone/Fax : 08 92 69 00 21 (0,34 E TTC/min - 2,21 F TTC/min)
Minitel: 3615 NETCOURRIER (0,15 E TTC/min - 1,00 F TTC/min)


--
To unsubscribe, e-mail:   <ma...@jakarta.apache.org>
For additional commands, e-mail: <ma...@jakarta.apache.org>

Re: simple question

[Shawn Bayern <ba...@essentially.net>]

On Tue, 12 Mar 2002 bwml@netcourrier.com wrote:

> Hi everybody,
> 
> I have a simple question :
> is it possible to define one tag attributes which can accept 2 types of parameters : Ex String or Object[].
> So to do this, i'll try to define 2 setters method:
> 	setMyAttribute(String str){...}
>   and   setMyAttribute(Object[] objectArray){...} 
> 
> but i'm running into errors, so i would like to know if it's possible
> and if someone has already done that or not..

Well, you can always drop back to the one type that String and Object[]
have in common:  Object itself.  This loses the compile-time type checking
that might otherwise be useful, but it should solve your problem:

  setMyAttribute(Object o) {
    if (o instanceof String) {
      // save it properly
    } else if (o instanceof Object[]) {
      // save it, differently
    } else
      throw new IllegalArgumentException("need String or Object[]");
  }

Alternatively, you could simple store the object in the accessor method
and process it each time (differentiating String and Object[]) at runtime
in methods like doStartTag().

--
Shawn Bayern
Author, "JSP Standard Tag Library"  http://www.jstlbook.com
(coming this spring from Manning Publications)


--
To unsubscribe, e-mail:   <ma...@jakarta.apache.org>
For additional commands, e-mail: <ma...@jakarta.apache.org>