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Posted to users@myfaces.apache.org by an...@magnasteyr.com on 2006/01/02 18:00:25 UTC
What Object Type for SelectManyCheckbox
Hi all!
I'm just trying the SelectManyCheckbox component. What is the best Object type the value of the SelectManyCheckbox should point to?
Should I take a List or a Long[] or a Object[]? What should be newPartnerDto.datenarten?
And how can I retrieve the selected items in my backing bean?
<h:selectManyCheckbox id="Datenarten" required="true" value="#{newPartnerDto.datenarten}">
<f:selectItems value="#{queryHelper.datenartContact}"/>
</h:selectManyCheckbox>
Regards,
Andy
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Re: What Object Type for SelectManyCheckbox
Posted by Dave Brondsema <da...@brondsema.net>.
Don't use a List (the spec requires that no conversion happens), use an
array. The type of array elements should be that of what you want to
store (e.g. Long, OrgPerson). Provide a converter if it is your own
class (e.g. OrgPerson).
See
http://java.sun.com/j2ee/javaserverfaces/1.1_01/docs/api/javax/faces/component/UISelectMany.html
especially the 3 bullet points in the class description.
andreas.mitter@magnasteyr.com wrote:
> Hi all!
>
> I'm just trying the SelectManyCheckbox component. What is the best
> Object type the value of the SelectManyCheckbox should point to?
>
> Should I take a List or a Long[] or a Object[]? What should be*/
> newPartnerDto.datenarten/*//?
> And how can I retrieve the selected items in my backing bean?
>
>
> <h:selectManyCheckbox id="Datenarten" required="true"
> value="#{newPartnerDto.datenarten}">
> <f:selectItems value="#{queryHelper.datenartContact}"/>
> </h:selectManyCheckbox>
>
>
> Regards,
> Andy
>
>
> ______________________________________________________________________
> This email and any files transmitted with it are confidential and
> intended solely for the use of the individual or entity to whom they are
> addressed. If you have received this email in error please notify your
> system manager. This footnote also confirms that this email message has
> been swept for the presence of computer viruses.
> ______________________________________________________________________
--
Dave Brondsema
Software Developer
Cornerstone University
AW: What Object Type for SelectManyCheckbox
Posted by Matthias Kahlau <mk...@web.de>.
Hi!
I use the Tomahawk selectManyCheckbox with f:selectItems bound to a
LinkedList of SelectItem instances. This instances have a java.lang.String
as label and a java.lang.Character as value.
For the value-binding of the selectManyCheckbox, I tried to use a LinkedList
instead of an Object or primitive array because I think the selected options
can be processed more easily by iterating over a list.
To set the currently selected values of the selectManyCheckbox, I filled the
related LinkedList by iterating over the f:selectItems LinkedList.
> If the value binding is a List, then the myfaces assumes (per the spec)
> that all elements are of type String, not the same type as
> SelectItem.getValue().
I tried both, using SelectItem.getValue() and
SelectItem.getValue().toString(), and both worked to set the currently
selected values. But when I tried to submit the page, I got a validation
error saying the values are no valid options, with both variants described
before.
I found the following blog entry referring to the same validation error
issue (see June 18, 2004):
http://jroller.com/page/nuprn1/20040722
Or see also:
http://www.crazysquirrel.com/computing/java/jsf/select-many.jspx
Does anyone of you know of a working solution using a List as value-binding
of the selectManyCheckbox component? Or can you confirm that using a List is
not possible? Are there any official statements?
I searched the Issue Tracking database of MyFaces
(http://issues.apache.org/jira/secure/BrowseProject.jspa?id=10600) and SUN
JSF RI (https://javaserverfaces.dev.java.net/) but didn't find any issues
regarding the List value-binding problem.
Regards,
Matthias
> -----Ursprüngliche Nachricht-----
> Von: users-return-14631-mkahlau=web.de@myfaces.apache.org
> [mailto:users-return-14631-mkahlau=web.de@myfaces.apache.org]Im Auftrag
> von Dave Brondsema
> Gesendet: Mittwoch, 4. Januar 2006 15:01
> An: MyFaces Discussion
> Betreff: Re: What Object Type for SelectManyCheckbox
>
>
> Simon Kitching wrote:
> > On Mon, 2006-01-02 at 18:00 +0100, andreas.mitter@magnasteyr.com wrote:
> >
> >>Hi all!
> >>
> >>I'm just trying the SelectManyCheckbox component. What is the best
> >>Object type the value of the SelectManyCheckbox should point to?
> >>
> >>Should I take a List or a Long[] or a Object[]? What should be
> >>newPartnerDto.datenarten?
> >>And how can I retrieve the selected items in my backing bean?
> >>
> >>
> >><h:selectManyCheckbox id="Datenarten" required="true"
> >>value="#{newPartnerDto.datenarten}">
> >> <f:selectItems value="#{queryHelper.datenartContact}"/>
> >></h:selectManyCheckbox>
> >
> >
> > Hopefully the improved taglib documentation in the current MyFaces TRUNK
> > makes this clear. Search this file for "selectManyCheckbox":
> >
> http://svn.apache.org/repos/asf/myfaces/impl/trunk/src/main/tld/my
> faces_html.tld
> >
> > If the docs still aren't clear enough, please let me know.
> >
>
> If the value binding is a List, then the myfaces assumes (per the spec)
> that all elements are of type String, not the same type as
> SelectItem.getValue().
>
> That should be made clear and since using a List does work unintuitively
> like that, I'd suggest listing it last, after "Object array or primitive
> array"
>
>
> --
> Dave Brondsema
> Software Developer
> Cornerstone University
>
Re: What Object Type for SelectManyCheckbox
Posted by Dave Brondsema <da...@brondsema.net>.
Simon Kitching wrote:
> On Mon, 2006-01-02 at 18:00 +0100, andreas.mitter@magnasteyr.com wrote:
>
>>Hi all!
>>
>>I'm just trying the SelectManyCheckbox component. What is the best
>>Object type the value of the SelectManyCheckbox should point to?
>>
>>Should I take a List or a Long[] or a Object[]? What should be
>>newPartnerDto.datenarten?
>>And how can I retrieve the selected items in my backing bean?
>>
>>
>><h:selectManyCheckbox id="Datenarten" required="true"
>>value="#{newPartnerDto.datenarten}">
>> <f:selectItems value="#{queryHelper.datenartContact}"/>
>></h:selectManyCheckbox>
>
>
> Hopefully the improved taglib documentation in the current MyFaces TRUNK
> makes this clear. Search this file for "selectManyCheckbox":
> http://svn.apache.org/repos/asf/myfaces/impl/trunk/src/main/tld/myfaces_html.tld
>
> If the docs still aren't clear enough, please let me know.
>
If the value binding is a List, then the myfaces assumes (per the spec)
that all elements are of type String, not the same type as
SelectItem.getValue().
That should be made clear and since using a List does work unintuitively
like that, I'd suggest listing it last, after "Object array or primitive
array"
--
Dave Brondsema
Software Developer
Cornerstone University
Re: What Object Type for SelectManyCheckbox
Posted by Simon Kitching <sk...@apache.org>.
On Mon, 2006-01-02 at 18:00 +0100, andreas.mitter@magnasteyr.com wrote:
> Hi all!
>
> I'm just trying the SelectManyCheckbox component. What is the best
> Object type the value of the SelectManyCheckbox should point to?
>
> Should I take a List or a Long[] or a Object[]? What should be
> newPartnerDto.datenarten?
> And how can I retrieve the selected items in my backing bean?
>
>
> <h:selectManyCheckbox id="Datenarten" required="true"
> value="#{newPartnerDto.datenarten}">
> <f:selectItems value="#{queryHelper.datenartContact}"/>
> </h:selectManyCheckbox>
Hopefully the improved taglib documentation in the current MyFaces TRUNK
makes this clear. Search this file for "selectManyCheckbox":
http://svn.apache.org/repos/asf/myfaces/impl/trunk/src/main/tld/myfaces_html.tld
If the docs still aren't clear enough, please let me know.
Regards,
Simon