[jsr-314-open-mirror] [jsr-314-open] f:selectItems value="#{myMap}" underspecified

[Martin Marinschek]

Hi Leonardo,

> Map - The keys of this object (once converted to Strings) are assumed to be
> labels, and the values of this object (once converted to Strings) are
> assumed to
> be values, of SelectItem instances that will be constructed dynamically and
> added to the set of available options for the parent component, in the order
> provided by an iterator over the keys.

I never understood why the labels should be the key here - it should
really be the other way round, and the value should be the key. I
thought that was sorted for 1.2 - it is not?

> This behavior comes from jsf 1.1, but in jsf 2.0 it was added some new
> attributes (from f:selectItems tlddoc):
>
> Version 2 of the specification introduces several new attributes, described
> below. These are: var, itemValue, itemLabel, itemDescription, itemDisabled,
> and
> itemLabelEscaped.
>
> Now, what happen if some user do something like this:
>
> <f:selectItems value="#{myMap}" var="item"
> itemLabel="#{item.value.someLabelProperty}" itemValue="#{item.value}">
>
> It just does not work, because there is no clear definition about what
> should
> f:selectItems do in this case.
>
> The proposal for solve this one is if var property is set and value
> implements
> Map interface, use the entry object as var, so the user can choose between
> the
> key and some attribute on the item value.

I totally agree - +1 from me.

best regards,

Martin