Question

I have the following code in JSF-2 Mojarra 2.0.8 running on Tomcat 7

<h:panelGrid  id="yesNoRadioGrid">
<h:panelGrid columns="2" rendered="#{user.yesNoRadioGridFlag}">
    <h:outputText id ="otherLbl" value="Select Yes or No"></h:outputText>
    <h:selectOneRadio id="yesNoRadio" value ="#{user.yesNoRadio}">
        <f:selectItems value="#{user.choices}"/>                    
        <f:ajax execute="@form" render="userDetailsGrid "></f:ajax>
    </h:selectOneRadio>
</h:panelGrid>
</h:panelGrid>      
<h:message for ="yesNoRadio"> </h:message>
<h:panelGrid  id="userDetailsGrid">
<h:panelGrid columns="2" rendered="#{user.yesNoRadio}">
    <h:outputLabel>Name :</h:outputLabel>
    <h:inputText id="customerName" value="#{user.customerName}"></h:inputText>
    <h:outputLabel>Salary: </h:outputLabel>
    <h:inputText id="customerSalary" value="#{user.customerSalary}"></h:inputText>
</h:panelGrid>
</h:panelGrid>

My managedBean contain following

private enum Choice {

    Yes, No; 
    } 
private Choice yesNoRadio;
public Choice[] getChoices() {
    return Choice.values(); 
    }
public Choice getYesNoRadio() {
    return yesNoRadio;
}
public void setYesNoRadio(Choice yesNoRadio) {
    this.yesNoRadio = yesNoRadio;
}

How can I render my ‘userDetailsGrid’ based on the boolean value (user.yesNoRadio) selected in

I found a workarround by adding following in my mangedbean

private Boolean yesNoRadio;
public SelectItem[] getMyBooleanValues() {   
    return new SelectItem[] {    
    new SelectItem(Boolean.TRUE, "Yes"),   
    new SelectItem(Boolean.FALSE, "No")    
    };   
}  

and changing my view to

<h:selectOneRadio id="yesNoRadio" value ="#{user.yesNoRadio}">
    <f:selectItems value="#{user.myBooleanValues}" />                   
    <f:ajax execute="@form" render="userDetailsGrid "></f:ajax>
</h:selectOneRadio>

Answer 1

You can also just check the enum value in the rendered attribute. Enums are evaluated as strings in EL, so you can do a simple string comparison. This way you can keep your original code.

<h:panelGrid columns="2" rendered="#{user.yesNoRadio == 'Yes'}">

By the way, you perhaps really want to use execute="@this" instead of execute="@form" (or just remove it altogether, it defaults to @this already). The execute="@form" will process the entire form and thus also fire validation there where you perhaps don’t want.