jsf - Composite component - change external bean value -

i have got composite component:

<cc:interface>     <cc:attribute name="value" required="true"> </cc:interface> <cc:implementation>     <h:outputtext value="#{cc.attrs.value}"/>     <h:commandbutton action="#{internalbean.someaction}"/> </cc:implementation> 

and change #{cc.attrs.value} #{internalbean.someaction}, in other words: change (string) value of user defined (external) bean method of composite component. how can it?

thanks.

update

one way can think of use <f:setpropertyactionlistener>.

<cc:interface>     <cc:attribute name="value" required="true"/> </cc:interface> <cc:implementation>     <h:outputtext value="#{cc.attrs.value}"/>     <h:commandbutton action="#{internalbean.someaction}">         <f:setpropertyactionlistener value="#{cc.attrs.value}" target="#{internalbean.stringvaluefromexternalbean}"/>     </h:commandbutton> </cc:implementation>