[
https://issues.jboss.org/browse/JBSEAM-4163?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Marek Novotny closed JBSEAM-4163.
---------------------------------
Resolution: Rejected
> Nullpointerexception from s:selectItems when noSelectionLabel is present and
> converter of selectOneMenu evaluates to null
> -------------------------------------------------------------------------------------------------------------------------
>
> Key: JBSEAM-4163
> URL: https://issues.jboss.org/browse/JBSEAM-4163
> Project: Seam 2
> Issue Type: Bug
> Components: JSF Integration
> Affects Versions: 2.1.1.GA
> Reporter: Jakub Janczak
>
> The problem is that when you have the noSelectionLabel in s:selectItems it
> installs a converter chain in the h:selectOneMenu.
> <h:selectOneMenu converter="#{conv}" .... >
> <s:selectItems noSelectionLabel="#{messages['noSelectionLabel']}" />
> </h:selectOneMenu>
> So when the #{conv} evaluates to null it blows. The problem is in the
> PrioritizableConverter as it has the constructor:
> public PrioritizableConverter(ValueExpression vb, int priority)
> {
> this.valueExpression = vb;
> this.priority = priority;
> }
> and then
> public String getAsString(FacesContext context, UIComponent component, Object
> value)
> throws ConverterException
> {
> return getDelegate().getAsString(context, component, value);
> }
> public Converter getDelegate()
> {
> if (valueExpression != null)
> {
> return (Converter)
> valueExpression.getValue(FacesContext.getCurrentInstance().getELContext());
> }
> else
> {
> return delegate;
> }
> }
> so if getDelegate returns null it's not able to convert.
> The solution would be to disable adding the PrioritizableConverter to the
> chain when the #{conv} evaluates to null (ConverterChain.java : 73)
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