[ http://issues.apache.org/jira/browse/TOMAHAWK-227?page=all ]
Johan Gorter resolved TOMAHAWK-227:
-----------------------------------
Resolution: Duplicate
http://issues.apache.org/jira/browse/TOMAHAWK-23
> Possibility to select nothing
> -----------------------------
>
> Key: TOMAHAWK-227
> URL: http://issues.apache.org/jira/browse/TOMAHAWK-227
> Project: MyFaces Tomahawk
> Type: Improvement
> Components: selectOneRadio / radio
> Reporter: Johan Gorter
>
> The UISelectOne descendants, especially the HtmlSelectOneMenu is missing a
> powerful option. They cannot be used to select nothing/null.
> I am using the selectCountry component to select an optional nationality of a
> person. This field is not required, so it should be able to display the empty
> option, resolving to null instead of a country code. I am using my own
> descendant of SelectOneCountry as displayed below. I think however that all
> users of tomahawk components would greatly benefit if the empty option can be
> turned on in a super component, like UISelectOne. This is also very useful
> with required="true". The user is then forced to select something, otherwise
> a validation error occurs.
> Hope you agree with this usefullness.
> Regards,
> Johan Gorter
> public class SelectOneOrNoCountry extends SelectOneCountry {
>
> private static final String NULL_MASK="@@NULL@@";
>
> private static SelectItem NOCOUNTRY=new SelectItem();
> static {
> NOCOUNTRY.setLabel(" - ");
> NOCOUNTRY.setValue(NULL_MASK);
> }
>
> protected List getCountriesChoicesAsSelectItemList() {
> List result = super.getCountriesChoicesAsSelectItemList();
> result.add(0, NOCOUNTRY);
> return result;
> }
>
> protected Object getConvertedValue(FacesContext context, Object
> submittedValue) {
> if (NULL_MASK.equals(submittedValue)) {
> return null;
> }
> return super.getConvertedValue(context, submittedValue);
> }
> }
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