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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