JSF 2.0 composite components with method-valued attributes

From: <webtier_at_javadesktop.org>
Date: Wed, 11 Feb 2009 15:04:28 PST

Hello,

I wonder if method-expression passing through a composite component attribute is supposed to work. I just want be able to specify an "action" method which would be passed to a command button. Unfortunately, the code works only if the attribute has the name "action". And I wanted to get this method from a controller. Here's a code sample:

<?xml version='1.0' encoding='UTF-8' ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:ui="http://java.sun.com/jsf/facelets"
      xmlns:c="http://java.sun.com/jsp/jstl/core"
      xmlns:f="http://java.sun.com/jsf/core"
      xmlns:h="http://java.sun.com/jsf/html"
      xmlns:composite="http://java.sun.com/jsf/composite">

    <composite:interface name="adjustableColumnHeader">
        <composite:attribute name="header" required="true" type="String" shortDescription="header to use"/>
    <composite:attribute name="action" method-signature="java.lang.String act()" targets="hidebutton"/>
    </composite:interface>
    <composite:implementation>
<th>
    <h:panelGrid columns="2">
            <h:outputText styleClass="tableHeader" value="#{compositeComponent.attrs.header}"/>
            <h:commandButton id="hidebutton" value="hide"
action="#{compositeComponent.attrs.action}"/>
              </h:panelGrid>
</th>
    </composite:implementation>
</html>

it is used later like:
    <composite:interface name="adjustableColumnHeader">
        <composite:attribute name="header" required="true" type="String" shortDescription="header to use"/>
        <composite:attribute name="headerClass" required="false" type="String" shortDescription="header class to use"/>
        <composite:attribute name="alwaysShown" required="false" type="Boolean" default="false" shortDescription="if true the column cannot be hidden"/>
        <composite:attribute name="firstOne" required="false" type="Boolean" default="false" shortDescription="if true this is the first column, hide button is rendered at its he
    <composite:attribute name="action" method-signature="java.lang.String act()" targets="hidebutton"/>

     <composite:attribute name="tablebean" required="true" shortDescription="a controller">
         <composite:attribute name="shownItems" required="true" type="java.util.Map" shortDescription="map which lists shown items"/>



                <h:selectBooleanCheckbox rendered="#{not compositeComponent.attrs.alwaysShown}"
                           value="#{compositeComponent.attrs.tablebean.checkboxes[compositeComponent.attrs.header]}"/>
              </h:panelGrid>
</th>
    </composite:implementation>

and of course then I cannot choose the name of the attribute.

Also it's a bit strange Jim's controller example uses only attribute-properties and
no attribute-methods. I guess turning switchlist example into a controller based one,
as Ed originally suggested, would be a lot of clue here.

Thanks a lot in advance!
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