Re: How to identify if any of a page's components failed validation after a submit
er... form.hasError()? form.onError()? What do you mean by page? - are there lots of forms on the page all with errors? -- View this message in context: http://www.nabble.com/How-to-identify-if-any-of-a-page%27s-components-failed-validation-after-a-submit-tp18599562p18605378.html Sent from the Wicket - User mailing list archive at Nabble.com. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: How to identify if any of a page's components failed validation after a submit
Ned Collyer wrote:
er... form.hasError()? form.onError()?
What do you mean by page? - are there lots of forms on the page all with
errors?
Thanks Ned for pointing out the form’s hasError() and onError(). I could
make use of these wtihin my visitor rather looking at all components. But
what if an error is created outside a form component? Such as:
if (!isPhoneDirectoryAvailble) {
Session.get().error(The phone directory is not
available at this
time…);
}
Let me explain my need for this. I’m writing a custom Refreshing view item
reuse strategy that will redisplay the items as they were submitted if any
page errors occur (such as validation). I know there is already an existing
ReuseIfModelsEqual strategy, but I cannot make use of it. The reason is my
model is many levels deep and is highly complex (hibernate generated) and
has its own equals/hashcode strategy (our custom implementation) which will
not work for this case and I don’t want to further override them. My custom
reuse strategy is rather simple. If a page error occurred in which the page
gets redisplayed, it simply makes use of the existing items (and does not
try to make use of any new items like the ReuseIfModelsEqual strategy does).
So going back to my original question, what is the best way to determine if
ANY error was generated on the page during the page submit?
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How to identify if any of a page's components failed validation after a submit
After a page submit, I need to identify if any components on the page failed
validation. I’ve come up with two possible solutions, but they both seem to
be workarounds and I'm not 100% they cover all conditions.
1. Traverse the page’s component hierarchy using a custom visitor.
protected final boolean isFormComponentsValid() {
final Object traversalValObj = visitChildren(new
ValidFormComponentVisitor());
if (traversalValObj == IVisitor.STOP_TRAVERSAL) {
return false;
}
return true;
}
public final class ValidFormComponentVisitor implements IVisitor {
public Object component(final Component component) {
if (component instanceof FormComponent) {
if (!((FormComponent) component).isValid()) {
return IVisitor.STOP_TRAVERSAL;
}
}
return IVisitor.CONTINUE_TRAVERSAL;
}
}
2. Traverse the feedback messages in search of an ERROR.
public static final boolean isValidationError() {
final IteratorFeedbackMessage messageIterator =
Session.get().getFeedbackMessages().iterator();
while (messageIterator.hasNext()) {
final FeedbackMessage feedbackMessage =
messageIterator.next();
if (feedbackMessage.getLevel() ==
FeedbackMessage.ERROR) {
return true;
}
}
return false;
}
Is there anything directly built into the framework that will provide me
with this information? Any other ideas will be appreciated.
Thanks!
Louis
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