Hi Nikola, never done it, but I think you have to override the resolver.
ie instead of the standard resolver, which looks for standard properties or
custom classes declared thru XML.... yours will tie to a class in your app.
Managed to find an ok article.... maybe its enuf for you to find the
relevent code in spring, and steal it ;)
http://today.java.net/pub/a/today/2006/03/07/unified-jsp-jsf-expression-language.html
----- Original Message -----
From: "Nikola Milutinovic" <[EMAIL PROTECTED]>
To: "Tomcat Users List" <users@tomcat.apache.org>
Sent: Friday, June 22, 2007 10:46 AM
Subject: How to write this elegantly in JSP/EL
Hi all.
This is not really TC related, but more JSP and EL question, but I thought
I'd ask.
I would like to have an elegant way of using constants from Java classes
in EL. This is a relatively good illustration of what I am talking about.
Take, for instance, a Spring controller. It has a method where the
programmer can bind objects to model-and-view, which basically binds it to
a request or session scope. It is very similar to a plain Servlet doing
"request.setAttribute( "name", value )".
public class SomeController extends SimpleFormController {
public static final String DATA_PHOTO_WIDTH = "photoWidth";
public static final String DATA_PHOTO_HEIGHT = "photoHeight";
...
protected referenceData( ... ) {
...
modelAndView.put( DATA_PHOTO_WIDTH, photoWidth );
modelAndView.put( DATA_PHOTO_HEIGHT, photoHeight );
...
}
...
}
And then in JSPF or JSP:
<img src="${imageUrl}" alt="Author photo" height="${photoHeight}"
width="${photoWidth}" />
Notice that the EL variable name is the same as that constant. So, I have
2 places to keep in synch. If I wrote that in a scriptlet, it would be
correct, from the point of "do not duplicate code":
<%= request.getAttribute(
com.libris4you.books.maintenancepanel.AuthorTabController.DATA_PHOTO_WIDTH
) %>
Now, how could I do the same in EL?
Something like (tongue in cheek):
width="${=com.libris4you.books.maintenancepanel.AuthorTabController.DATA_PHOTO_WIDTH}"
Did I miss something crucial in EL?
Nix.
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