jsf - OmniFaces:SelectItemsConverter 不适用于 PrimeFaces: PickList

Question

我正在尝试将 SelectItemsConverter 与 PrimeFaces Picklist 结合使用。

XHTML:

<p:pickList id="plUpdateFirma" value="#{bsvttController.dlmFirma}" var="plFirma"
    itemLabel="#{plFirma.schluesselFirma}" itemValue="#{plFirma}"
    converter="FirmaConverter">

    <f:facet name="sourceCaption">
        Vorjahr
    </f:facet>
    <f:facet name="targetCaption">
        #{bsvttController.selSaison}
    </f:facet>

    <p:column>
        #{plFirma.schluesselFirma}  
    </p:column>

</p:pickList>

转换器:

@FacesConverter(value = "FirmaConverter")
public class FirmaConverter extends SelectItemsConverter
{ 

    @Override
    public String getAsString(final FacesContext facesContext, final UIComponent component, final Object object)
    {
        return ((Firma) object).getSchluesselFirma();
    }

}

bean :

@ManagedBean
@ViewScoped
public class BsvttController implements Serializable
{
    private DualListModel<Firma> dlmFirma;
    private List<Firma> dlmFirmaSource;
    private List<Firma> dlmFirmaTarget;
    private Firma firma;

    @PostConstruct
    public void init()
    {
        dlmFirmaSource = FirmaPersistenz.leseFirmaAlle();
        dlmFirmaTarget = new ArrayList<Firma>();
        dlmFirma = new DualListModel<>(dlmFirmaSource, dlmFirmaTarget);
    }

    public DualListModel<Firma> getDlmFirma()
    {
        return dlmFirma;
    }
    public List<Firma> getDlmFirmaSource()
    {
        return dlmFirmaSource;
    }
    public List<Firma> getDlmFirmaTarget()
    {
        return dlmFirmaTarget;
    }

    public void setDlmFirma(DualListModel<Firma> dlmFirma)
    {
        this.dlmFirma = dlmFirma;
    }
    public void setDlmFirmaSource(List<Firma> dlmFirmaSource)
    {
        this.dlmFirmaSource = dlmFirmaSource;
    }
    public void setDlmFirmaTarget(List<Firma> dlmFirmaTarget)
    {
        this.dlmFirmaTarget = dlmFirmaTarget;
    }

}

在调试转换器时，我可以看到 getAsString 方法工作正常。但提交表单后，两个数组列表(dlmFirmaSource 和 dlmFirmaTarget)都是空的。

OmniFaces 展示表明这一点

"The omnifaces.SelectItemsConverter allows you to populate e.g. a drop-down with complex Java model objects as value of f:selectItems and have JSF convert those automatically back without the need to provide a custom converter which may need to do the job based on possibly expensive service/DAO operations."

但是对于 PickList 组件，不存在任何 f:selectItems 标记。

SelectItemsConverter 是否支持 PickList 组件？

Answer 1

Does SelectItemsConverter even support PickList component?

不，事实并非如此。

自 OmniFaces 1.5 起，您可以使用 omnifaces.ListConverter或omnifaces.ListIndexConverter达到预期的目的。另请参阅the ListConverter showcase example它还演示了 <p:pickList> 上的用法.