Conditionally rendered button, design, calling an action

JFS1.2 + Richfaces 3.3

Situation is as follows:

JSP page renders conditionally one or another panelGroup.

Within each panelGroup there are couple setters and one command button. Each of two panelGroups uses own bean for setting and performing action.

On the top of a page there's selectOneRadio with (obvious) two items - coresponding tow options of conditional rendering.

Page renders properly, switcher causes to render appropriate panel. Case is, commands buttons doesn't call an action.

I know what's going on - when I click a button to call action dom is regenerated, but the value that hold my decision to display particular panel doesn't exist anymore. The button is not recreated, action is not fired.

Technically:

<h:selectOneRadio value="#{reportType}">
                <f:selectItem itemLabel="x" itemValue="x"/>
                <f:selectItem itemLabel="y" itemValue="y"/>
                <a4j:support event="onclick" reRender="xPanel, yPanel/>
</h:selectOneRadio>

<h:panelGrid id="xPanel "columns="2" rendered="#{reportType eq 'x'}">
    <...some setters>
    <... commandbutton&开发者_StackOverflow社区gt;
</h:panelGrid>

<h:panelGrid id="yPanel "columns="2" rendered="#{reportType eq 'y'}">
    <...some setters>
    <... commandbutton>
</h:panelGrid>

Question is, how to design the page to obtain proper rendering and actions? For now, I created additional session bean that holds switching value (x|y), but that desing smells bad for me...

RichFaces 3.3 offers the <a4j:keepAlive> tag which does basically the same as Tomahawk's <t:saveState> and JSF2 @ViewScoped. Add the following line somewhere in your view:

<a4j:keepAlive beanName="#{bean}" />

This will keep the bean alive as long as you're returning null or void from action(listener) methods.

See also:

• JSF 1.2: How to keep request scoped managed bean alive across postbacks on same view?