Re: Modify textfield input before validation
Just because converter can convert 'from' and 'to' doesn't mean you can't use it for one direction only Am 12.12.2008 um 13:01 schrieb pixologe: seems to be igor's point of view, at least: http://www.nabble.com/append-a-converter-or-coversion-function-td15921777.html#a15964449 Peter Ertl wrote: I really wonder why converters are not the right thing to do? -- View this message in context: http://www.nabble.com/Modify-textfield-input-before-validation-tp20952903p20974347.html Sent from the Wicket - User mailing list archive at Nabble.com. - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
Re: Modify textfield input before validation
That's right - but if the devs regard this as abuse, there's no guarantee that this still works in the next version. That's why I wondered what is the intended way of doing stuff like this. Obviously there is none :-/ Peter Ertl wrote: Just because converter can convert 'from' and 'to' doesn't mean you can't use it for one direction only Am 12.12.2008 um 13:01 schrieb pixologe: seems to be igor's point of view, at least: http://www.nabble.com/append-a-converter-or-coversion-function-td15921777.html#a15964449 Peter Ertl wrote: I really wonder why converters are not the right thing to do? -- View this message in context: http://www.nabble.com/Modify-textfield-input-before-validation-tp20952903p20974347.html Sent from the Wicket - User mailing list archive at Nabble.com. - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org -- View this message in context: http://www.nabble.com/Modify-textfield-input-before-validation-tp20952903p20979572.html Sent from the Wicket - User mailing list archive at Nabble.com. - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
Modify textfield input before validation
Hi all, How can/should modification of (textual) user input be implemented, so that it runs before validation? (e.g. prepend a URL with http://; if the user did not do so) My thoughts were: IConverter - but other threads on the list point out that it is only to be used for type conversion, not for String-String conversion. IModel - but setObject is called after validation. IValidator - but IValidatable has not setValue, thus modification is not possible here. Thanks for any hints and regards -- View this message in context: http://www.nabble.com/Modify-textfield-input-before-validation-tp20952903p20952903.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: Modify textfield input before validation
As for me, I think it's better to make a client side javascript, which
do the prepend in onchange event.
But in your case, maybe just make a class like
class SiteUrl implements Serializable
{
private final String url;
public SiteUrl(final String url)
{
this.url = url;
}
public String getUrl(){return url;}
}
(or event use URL from jdk).
and implement IConverter for it.
2008/12/11 pixologe [EMAIL PROTECTED]:
Hi all,
How can/should modification of (textual) user input be implemented, so that
it runs before validation?
(e.g. prepend a URL with http://; if the user did not do so)
My thoughts were:
IConverter - but other threads on the list point out that it is only to be
used for type conversion, not for String-String conversion.
IModel - but setObject is called after validation.
IValidator - but IValidatable has not setValue, thus modification is not
possible here.
Thanks for any hints and regards
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Re: Modify textfield input before validation
Thanks for your ideas... But huh... is there really no wicket way to achieve this? After all I would not think that it is uncommon to fix simple things in user input before validation, e.g. trim strings, discard empty items in comma separated lists etc. Your solutions would work both I think, I just do not like the idea of doing things like these with javascript. Also, retrieving a String value from DB and wrapping it into an object just in order to be able to convert it back does not seem right to me... I'll probably stick to the js solution (reluctantly ;-), but if there is really no elegant way, I would love to see one in future wicket versions. Thanks for inspiration! best regards -- View this message in context: http://www.nabble.com/Modify-textfield-input-before-validation-tp20952903p20956050.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: Modify textfield input before validation
Hi
I had the same problem. The closest thing I found was, to create my own
instance of TextField:
private static class MyTextField extends TextField {
// constructors...
protected void onComponentTag (ComponentTag tag) {
super.onComponentTag(tag);
String value = getValue(); // you can do anything here, for
example to display a default value if the model value was null/empty
tag.put(value, value);
}
public String[] getInputAsArray () {
String[] inputArray = super.getInputAsArray();
if (inputArray == null || inputArray.length == 0 ||
StringUtils.isBlank(inputArray[0])) {
return EMPTY_STRING_ARRAY.clone();
}
String value = inputArray[0].trim();
// modify value as needed. This is executed before the validator
inputArray[0] = value;
return inputArray;
}
}
pixologe wrote:
Thanks for your ideas...
But huh... is there really no wicket way to achieve this?
After all I would not think that it is uncommon to fix simple things in user
input before validation, e.g. trim strings, discard empty items in comma
separated lists etc.
Your solutions would work both I think, I just do not like the idea of doing
things like these with javascript.
Also, retrieving a String value from DB and wrapping it into an object just
in order to be able to convert it back does not seem right to me...
I'll probably stick to the js solution (reluctantly ;-), but if there is
really no elegant way, I would love to see one in future wicket versions.
Thanks for inspiration!
best regards
--
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Ergon Informatik AG, Kleinstrasse 15, CH-8008 Zürich
http://www.ergon.ch
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Re: Modify textfield input before validation
As I remember, wicket trims spaces already, so you don't need do
anything special about it.
For DB, if you use hibernate (or if not, anyway you should have data
objects for your business entities), you can have something like that:
public class MyEntity
{
// This is mapped to database, but not for public, only database will use it.
private String siteUrlStr;
// this is your public interface:
public SiteUrl getSiteUrl(){return new SiteUrl(getSiteUrlStr());}
public void setSiteUrl(SiteUrl url){siteUrlStr = url.getStr();}
}
And in code the lists should be treated as List, Collection or so, not
as comma-separated strings (only in some particular places like
persisting in database or in user interface).
2008/12/11 pixologe [EMAIL PROTECTED]:
Thanks for your ideas...
But huh... is there really no wicket way to achieve this?
After all I would not think that it is uncommon to fix simple things in user
input before validation, e.g. trim strings, discard empty items in comma
separated lists etc.
Your solutions would work both I think, I just do not like the idea of doing
things like these with javascript.
Also, retrieving a String value from DB and wrapping it into an object just
in order to be able to convert it back does not seem right to me...
I'll probably stick to the js solution (reluctantly ;-), but if there is
really no elegant way, I would love to see one in future wicket versions.
Thanks for inspiration!
best regards
--
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Re: Modify textfield input before validation
I really wonder why converters are not the right thing to do?
Trimming crap off the input is a one-way conversion *imho*
Am 11.12.2008 um 20:45 schrieb pixologe:
Please note that these were just examples, not actual use cases of
mine
(apart from the URL stuff).
Anyway, I think there are quite some use cases where fixing/
optimizing user
input makes sense. I've always thought converters would be the way
to go,
but just recently read that they aren't.
Having stuff like this done in the domain object's setter is far to
backend
for my taste. As this feature addresses user interaction, I think it
is
rather a matter of presentation, and I would not think that my
domain object
should have to care. Worse, using this scenario it would not be
possible to
use wicket's validation behavior _after_ doing the modification. One
could
use a model as well, then.
kan-4 wrote:
As I remember, wicket trims spaces already, so you don't need do
anything special about it.
For DB, if you use hibernate (or if not, anyway you should have data
objects for your business entities), you can have something like
that:
public class MyEntity
{
// This is mapped to database, but not for public, only database
will use
it.
private String siteUrlStr;
// this is your public interface:
public SiteUrl getSiteUrl(){return new SiteUrl(getSiteUrlStr());}
public void setSiteUrl(SiteUrl url){siteUrlStr = url.getStr();}
}
And in code the lists should be treated as List, Collection or so,
not
as comma-separated strings (only in some particular places like
persisting in database or in user interface).
2008/12/11 pixologe pixol...@mailinator.com:
Thanks for your ideas...
But huh... is there really no wicket way to achieve this?
After all I would not think that it is uncommon to fix simple
things in
user
input before validation, e.g. trim strings, discard empty items in
comma
separated lists etc.
Your solutions would work both I think, I just do not like the
idea of
doing
things like these with javascript.
Also, retrieving a String value from DB and wrapping it into an
object
just
in order to be able to convert it back does not seem right to me...
I'll probably stick to the js solution (reluctantly ;-), but if
there is
really no elegant way, I would love to see one in future wicket
versions.
Thanks for inspiration!
best regards
--
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