Validate the XML first, using DTD, RELAX NG, W3C Schema or similar?
James
nadav steindler wrote:
How do I parse an xml file and build a parse tree of caster-generated
objects and get it to produce error messages a systems engineer can
understand(short, with line numbers, with no reference to internals of
the code such as classes), rather than:
"The following exception occured while validating field: _firstVersion
of class: com.nds.castorgenericformat.AMSGenericConversionFormat: The
following exception occured while validating field:
_firstVersionDefTypeHeader of class:
com.nds.castorgenericformat.FirstVersion: The following exception
occured while validating field: _headerTypeInput of class:
com.nds.castorgenericformat.FirstVersionDefTypeHeader: The following
exception occured while validating field:
_groupOfSTBMessageFieldDefsList of class:
com.nds.castorgenericformat.HeaderTypeInput: The following exception
occured while validating field: _flagsByte of class:
com.nds.castorgenericformat.GroupOfSTBMessageFieldDefs: The field
'_name' (whose xml name is 'name') is a required field of class
'com.nds.castorgenericformat.FlagsByte"
Which is what happens when I do:
try
{
//Set up a Unmarshaller
Unmarshaller unmarshaller = new
Unmarshaller(AMSGenericConversionFormat.class);
// Build parse tree from file
AMSGenericConversionFormat genericFormat =
(AMSGenericConversionFormat)unmarshaller.unmarshal(reader);
}
catch (MarshalException e1)
{
system.out.println(e1.getMessage());
}
catch (ValidationException e2)
{
system.out.println(e2.getMessage());
}
I'd rather get something like:
"error line 52 in foo.xml, attribute "name" is missing"
Thanks,
Nadav
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