Are you absolutely sure about the last part?
If you do an expression will it call .toString() on the return value?
> -----Original Message-----
> From: A mailing list about Java Server Pages specification and reference
> [mailto:[EMAIL PROTECTED]]On Behalf Of Hans Bergsten
> Sent: Tuesday, September 26, 2000 8:24 PM
> To: [EMAIL PROTECTED]
> Subject: Re: taglib attribute question
>
>
> Jill Foley wrote:
> >
> > I'm reading about tag libs and I have a question about
> > attributes.
> >
> > I read "The attribute value is supplied to the method as a
> > String". But then I saw an example of a tag handler for the tag
> >
> > <tlt:twa attr1="value1">
> >
> > that had:
> >
> > private AttributeClass attr1;
> > setAttr1(AttributeClass ac) {...}
> >
> > So my question is: can an attribute be any java object? Can I do
> > this?:
> >
> > <mylib:presonHeader param="<%= personBean.getPerson() %>" />
> >
> > and have a setParam(Person person) in my tag handler?
>
> None of the answers I've seen so far is 100% right, so let me try to
> clarify what the spec says you can and can not do.
>
> If you use a literal string as the attribute value, such as
>
> <tlt:twa attr1="value1" />
>
> the JSP container looks at the type of the corresponding property in the
> tag handler class to see if the value needs to be converted. If the
> property is of type boolean, Boolean, byte, Byte, char, Character, double,
> Double, int, Integer, float, Float, long or Long, it will try to convert
> the string value to the correct type for the property. If the property
> is a String, the value is of course used as is. If it's something else,
> you get a translation-time error.
>
> If you need to use an attribute that is not one of the types listed above,
> you need to use a request-time attribute value, such as
>
> <tlt:twa attr1="<%= personBean.getPerson() %>" />
>
> When you use a request-time attribute value, the JSP container does not
> attempt to do any type conversion. In other words, the type of the
> expression must match the type of the corresponding tag handler property.
>
> Hans
> --
> Hans Bergsten [EMAIL PROTECTED]
> Gefion Software http://www.gefionsoftware.com
>
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