I'm looking for ways to assign a specific error message for required
fields. Setting the javax.faces.component.UIInput.REQUIRED isn't a
solution because I want a specific message for different fields.
I thought of implementing an custom validator (method) and doing my own
"required" check instead of using the "required=true" tag. Unfortunately
this is stated in section 3.5.5 in the JSF Specification 1.1:
"Unless otherwise specified, components with a null local value cause the
validation checking by this Validator to be skipped. If a component should
be required to have a non-null value, a component attribute with the name
required and the value true must be added to the component in order to
enforce this rule."
My conclusion is that the only way to enable this behaviour whould be to
overwrite the validate method in UIInput in an custom component. You can
see what that leads to, you'd have to make a custom implementation of
every component that extends UIInput.
Real solutions to this issue:
- Make the default validation behaviour of UIInput optional in order to be
able to write a custom validator that does the empty/null checking.
- Implement an additional attribute on UIInput "requiredMessage=....".
Did I miss an alternative solution?
Is this a flaw in the specification?
Marc.
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