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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