taglib custom tags

[Stefano Cazzola]

Hi everybody.
I'm new to JSP programming, even if I have a fair knowledge of Java.
I would like to use custom tags, and to nest them into each other attributes... something like that

<myLib:myTag1 att1="<myLib:myTag2 ....... />" />

I've seen many tags used like this (as c:url for examble) but I'm not able to do this.

Can anybody help me?

Thanks,
Stefano

[Bear Bibeault]

No, you haven't seen that. You cannot use a custom tag as an attribute value of another custom tag.

[Stefano Cazzola]

Actually, you are right. I didn't see that. I saw (and used)
<img src="<c:url ... />" />
I supposed it was a standard behavior and that it was possible also with custom tags.

However I found a solution (quite verbose but effective) to use the output of a custom tag as value for an attribute of another custom tag
<myLib:myTag1> <jsp:attribute name="att1"> <myLib:myTag2 ...... /> </jsp:attribute> </myLib:myTag1>

Stefano

[Bear Bibeault]

Stefano Cazzola wrote:I supposed it was a standard behavior and that it was possible also with custom tags.

Ahhhh! This is an important distinction. HTML tags, and all other client-side markup is just template text to the JSP engine. It could be the Magna Carta as far as the JSP engine is concerned -- it doesn't apply any semantics to it whatsoever.

However I found a solution (quite verbose

The more standard way is to store the output of the custom tag in a scoped variable, and then use the EL to supply that value as the attribute value.

[Stefano Cazzola]

Thanks Bear!
I'll follow the standard way, then.

Bye,
Stefano