updating datamodel using af:table

no ideas? ... does anybody understand my problem?  

Kuni schrieb:
> Hello,
>
> i'm developing a jsf page which display's a
'simple' table, and the 
> table content and layout depends on several properties.
the user could 
> change these properties on the same jsf, which should
updates the 
> table....(onChange=form.submit())
>
> the jsf consists of two parts.. one main-jsf which
display some input 
> and select-fields for updating the values... and the
<af:table> which 
> is included by <jsp:include ..page="<%=
session..getA....%.>". >
>
> the table columns are like:
> <af:table ...>
>    <column
rendered="#{map['key']!=null}">...
>    <h:outputText ../>
>    </column>
> </af:table>
> to provide content-dependent columns. 
>
> when the properties where changed (via input
fields)...a db-query is 
> executetd to update the table content (datamodel)
> the new table could have more or less columns an the
table should be 
> completely updates... but an indexOutOfBound Exception
will be 
> thrown... when the <table> component tries to
display a columns-which 
> not exists...(in the new table..)
>
> how can i 'reset' the table..so that the table is
rendered again using 
> the new columns....
>
> ..any ideas?
>
> thanks,
> kuni
>
>