JSTL + custom tags

[Jorge Blaz]

Hello,

I want to pass a dynamic property to a custom tag. I'm using JSTL 1.0 + Jsp 1.2

I've tried this, but none of the above seem to work:

<mytag:city postalCode="<c ut value='${myCode}' />" />
<mytag:city postalCode="${myCode}" />

Any ideas of how to do this?. (the "myCode" variable is stored in page context)

Thanks in advance.
Jorge

[Bear Bibeault]

In JSP 2.0 your second example will work just fine since the EL is evaluated by the JSP container.

Under JSP 1.2 you're kinda stuck because the EL is only interpreted by the JSTL tags.

Here are some options:

1) Evaluate the EL expression within your tag using the JSTL API. I've not done this (since I use JSP 2.0) so I don't know how hairy it is.

2) Do something like:

<mytag:city postalCodeKey="myCode" context="page" />

where you tell the tag how to look up the value in the scoped variables.

3) Punt back to scriptlet expressions:

<mytag:city postalCode="<%= pageContext.getAttribute("myCode") %>" />

4) Upgrade to Tomcat 5 and JSP 2.0/JSTL 1.1.

[Bear Bibeault]

Btw, your topic title would better have been "EL and custom tags".

[Jorge Blaz]

The best option would be number 1, but it will be hard to find examples
of how to do this.

Options 3 and 4 are good but I must use JSP 1.2 and I try to avoid scriptlets by using JSTL and custom tags.

So, i will try to do it with option 2.

Thanks for the help Bear, and you're right, the title should have been better EL and custom tags.