How to set the styleclass attribute of a JSF component from bean?

Question

I am using Icefaces 3.2. I would like to know how to reset the styleClass attribute of a component e.g textarea from the backing bean method.

USECASE: I have an ace:textAreaEntry which has a validator method in the backing bean. In this backing bean I am doing some validation. If the validation fails I want a particular CSS class applied to the component. So I want to reset the value of the styleclass attribute.

Answer 1

You can set the styleClass conditionally ,like this

<ace:textAreaEntry 
    styleClass="#{facesContext.validationFailed?'failedClass':'validClass'}"/>

or assign fail class only and otherwise no class at all

<ace:textAreaEntry 
    styleClass="#{facesContext.validationFailed?'failedClass':''}"/>

If you manually set message to be displayed in your page you can check if facesContext.messageList is empty or not, like this

<ace:textAreaEntry 
    styleClass="#{(not empty facesContext.messageList)?'filedClass':'validClass'}"/>

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If you want to test for some specific internal logic validation you can check for some boolean for example

<ace:textAreaEntry 
    styleClass="#{(myBean.someComponentFailed)?'filedClass':'validClass'}"/>

where someComponentFailed is some property that you set to true/false upon validation failure