How to get validation status from JSF component

问题

I want set a special error class to div block into my custom component for JSF. I want set errorClass to "error" if this field failed the validation.

<c:if test="${?????}">
    <c:set var="errorClass" value="error" />    
</c:if>

<div class="input ${errorClass}">
    <label for="#{rich:clientId('input')}:input">#{cc.attrs.label}</label>
    <h:inputText id="input" value="#{cc.attrs.value}"
        <cc:insertChildren />
    </h:inputText>
</div>

回答1:

You can use component.valid inside the style or styleClass attribute of your inputText:

<h:inputText value="#{cc.attrs.value}" 
             styleClass="#{component.valid ? '' : 'error'}" />

However, this won't work in your div since it is no jsf component. You could try component binding (from theory, not tested):

<div class="#{myComponent.valid ? '' : 'error'}">
    <h:inputText id="input" value="#{cc.attrs.value}" binding="#{myComponent}">
        <cc:insertChildren />
    </h:inputText>
</div>

来源：https://stackoverflow.com/questions/11559460/how-to-get-validation-status-from-jsf-component