[castor-dev] Unmarshalling and Validating xsi:nil

[Jene Jasper]

Keith,
To get validation working correctly for an UnmarhalHandler, that 
supports xsi:nil, I have created the attached 
TestCaseBug1723Unmarshaller. The used classes are generated based on the 
attached bug1723.xsd. The asserts and fails that don't work as expected 
are commented out. For some ValidationException a wrong reason is 
creating the correct behavior in which case I have added a temporary 
alternative assert. Could you take a look if my validation assumptions 
are correct ?

To get the validation correct for the above asserts and fails the 
Validator needs to have some notion if  the tag was supplied  (for 
example <...Tag/>) or supplied and has attribute xsi:nil set (for 
example <...Tag xsi::nil="true"/>) or if the tag wasn't there. In other 
words handle <...Tag/> and <...Tag xsi::nil="true"/> as field is null 
and fieldNilOption is true (Note: exception is <StringTag/> which has 
field = "" and nilOption is false). When the tag is missing handle it as 
field is null and field nilOption is false. Or should <...Tag/> as if 
<...Tag xsi::nil="false"/> and thus throw required field exception with 
<StringTag/> still the only exception. In the latter case some of my 
validation assumptions aren't correct (and even a hasFieldOption might 
be necessary) !

An example of a generated class that could be used for this purpose is 
the attached TopValidationTag with nilOptions: private boolean 
_nil_requiredNillableDateTag and private java.util.ArrayList 
_nilRequiredMultipleDateTag.

To set those nilOptions I would like to add a new method public void 
setValue( java.lang.Object object, java.lang.Object value, boolean nil) 
to XMLFieldHandler. But the UnmarhalHandler makes use of  the 
FieldHandler. Should I move it to FieldHandler or create a helpermethod 
in UnmarhalHandler for all  handler.setValue calls that checks if the 
handler is an instanceof XMLFieldHandler and then call the new method 
because in the end all handler that are encountered are XMLFieldHandler 
anyway ?

Because e-mail was to large for castor-dev I will try to send smaller 
parts of the above mentioned attachments as replies.

Thanks,
Jene

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