automatically trim() all input fields?

[jeanluc]

Is there an elegant way (perhaps an interceptor?) to automatically trim the spaces from any user-input String fields in forms?

Since the form fields are bound to entities which are then saved, there isn't an obvious point in which to trim all String attributes. Since this is a UI concern, I'd like to keep this trimming out of the entities themselves.

Thank you,
-jl

[thokuest]

We made very positiv experience with Entity Listeners.

[amitev]

I would suggest to simply create a custom converter and attach it to all string fields in faces-config.xml

<converter>
    <converter-for-class>java.lang.String</converter-for-class>
    <converter-class>your.Converter</converter-class>
</converter>

And trim the string in the getAsObject() method.