The problem of changing db / entity metadata requiring a second change in the
ui is not new and has been around for ever and predates java.
However to make life easier just make a utility f(x) that will grab the entity
and check for the field and see if it has a Hibernate annotation or your own
custom annotation and get the appropriate metadata (length / precision etc )
you need and then use it.
Maxlength and size both support EL. So you can do a
size="#{fieldMetadata.sizeCalc('foo.class', 'field'}" instead of a " size="2".
You can use custom facelets to do the same thing.
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