Thanks Ed,
I've decided that a simple array is the way to go for me here. It will
just be an array of Strings, nothing too complex. The validator is
proving a little more complex to figure out.
So, I have an array of Strings in a form property and I need to be sure
that each String in that array matches a simple RE (i.e. it only
consists of a-z, A-Z and space). Can someone give me an example of how
to do this or a link to a howto?
Before anyone shouts "RTFM" I've tried and the FM doesn't actually tell
you how to validate arrays. It alludes to the fact that it's possible
but doesn't tell you how. The best documentation I've been able to find
on the Validator on the struts site is:
http://struts.apache.org/1.x/faqs/validator.html
This page is not a full API spec by any means but it does claim to link
to a full spec at
http://struts.apache.org/1.x/struts-action/apidocs/org/apache/struts/validator/package-summary.html#package_description
thing is that page gives a 404.
People have complained that the struts page is difficult to extract
useful information from before and now I'm joining them. I'm not afraid
to RTFM to figure something out but since I can't even find the manual
on the Struts site I'm a little stuck. I've tried googling for "struts
validator array" with no luck. Just some posts on other boards where
really rude people are telling people to RTFM but not giving a link to
the FM which seems impossible to find :(
Help!
Bart.
Ed Griebel wrote:
Lists is where you want to be headed, see answer to previous question
as to how to do it on JSP. The key is that the Jakarta
BeanUtils/PropertyUtils classes treat arrays and collections the same
way so both can use brackets for element indexing. The key is to
predefine the instance, I think struts will throw an exception if your
list instance is null.
It doesn't even need to be a LinkedList, as long as it implements List
(and possibly Collection??).
As to the validator, I'm pretty sure it handles it, just don't know
off the top of my head how it does it.
-ed
On 8/1/06, Bart Busschots <[EMAIL PROTECTED]> wrote:
Following on from my earlier email it strikes me that the most sensible
way to deal with collecting a variable number of student names is to
have a LinkedList in your form bean. However, the question then is, can
Struts handle this? Can the validator handle this? I would need the
validator to apply one rule to all elements of a variable length list?
I have a feeling I've stumbled into a limitations with Struts here but I
could be wrong. So far no amount of googling has helped me out here. If
anyone has any pointers on where to look for solutions to this I'd be
much obliged. I can't be the first person to want to change the layout
of a latter page in a multipage form within struts based on the values
submitted in a previous page!
Thanks,
Bart.
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