Actually Werner, I discovered that it's pretty easy to validate an XML
document, using the javax.xml.validation classes. And in my particular
case, I just want to validate it after marshalling, not unmarshall it.
FWIW, here is my validation code:
import javax.xml.validation.Schema;
import javax.xml.validation.SchemaFactory;
import javax.xml.validation.Validator;
…
SchemaFactory factory =
SchemaFactory.newInstance("http://www.w3.org/2001/XMLSchema";);
InputStream schemaInputStream =
getClass().getResourceAsStream(“myschema.xsd”);
Schema schema = factory.newSchema(new StreamSource(schemaInputStream));
Validator xmlValidator = schema.newValidator();
String xml = "xml document contents go here”;
StreamSource xmlSource = new StreamSource(new StringReader(xml));
try {
xmlValidator.validate(xmlSource);
} catch (SAXException e) {
// handle validation errors
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
And if you want to get *all* validation errors, you can use your own
ErrorHandler implementation:
xmlValidator.setErrorHandler(new MyErrorHandler());
Where MyErrorHandler is defined as:
class MyErrorHandler extends org.xml.sax.helpers.DefaultHandler {
public List<SAXParseException> errors = new ArrayList();
public void error(SAXParseException e) throws SAXException {
// add the error to our list but don't throw it, so the validator can
continue
errors.add(e);
}
}
You could also implement org.xml.sax.ErrorHandler directly, adding
warning() and fatalError() methods.
-Steve
On Jun 4, 2009 2:40am, Werner Guttmann <[email protected]> wrote:
Steve,
there's one (or more) existing Jira issues out there which is about
adding exactly this feature. As far as I remember, the code base holds a
50% solution, but there's still some areas to be added/coded to enable
the described behaviour.
Fell free to have a look at the code base, the Jira issues and let us
know whether you'd like to contribute.
Cheers
Werner
Steve Kingsland wrote:
> I have configured my castor.properties file so that I'm now getting my
XML
> documents validated against the Schema when I unmarshall, by adding
these
> lines:
>
> org.exolab.castor.parser.namespaces=true
>
> org.exolab.castor.sax.features=http://xml.org/sax/features/validation,\
>
> http://apache.org/xml/features/validation/schema,\
>
> http://apache.org/xml/features/validation/schema-full-checking
>
> But I notice that I get a “MarshalException” when the document fails to
> validate, instead of a “ValidationException”. For example:
>
> *org.exolab.castor.xml.MarshalException*: cvc-enumeration-valid: Value
> 'PFPa' is not facet-valid with respect to enumeration '[PFP, MTBS]'. It
must
> be a value from the enumeration.{File: [not available]; line: 6;
column: 54}
>
> at
>
org.exolab.castor.xml.Unmarshaller.convertSAXExceptionToMarshalException(*
> Unmarshaller.java:794*)
>
> at org.exolab.castor.xml.Unmarshaller.unmarshal(*Unmarshaller.java:760
> *)
>
> at org.exolab.castor.xml.Unmarshaller.unmarshal(*Unmarshaller.java:626
> *)
>
> at org.CastorTest.validateXml(*CmhToStamps.java:378*)
>
> at org.CastorTest.testMarshallGeneric(*CmhToStamps.java:242*)
>
> at org.CastorTest.main(*CmhToStamps.java:55*)
>
> Caused by: *org.xml.sax.SAXParseException*: cvc-enumeration-valid: Value
> 'PFPa' is not facet-valid with respect to enumeration '[PFP, MTBS]'. It
must
> be a value from the enumeration.
>
> at
>
org.apache.xerces.util.ErrorHandlerWrapper.createSAXParseException(Unknown
> Source)
>
> at org.apache.xerces.util.ErrorHandlerWrapper.error(Unknown Source)
>
> ...
>
> (etc.)
>
> That's fine, but ideally I'd like the XML parser to inform me of **all**
> validation errors, not just the first one it comes across. And looking
at
> the ValidationException class, I see a getNext() method which looks
like it
> was meant to support this feature! So how do I get Castor to throw a
> ValidationException when my XML document fails validation?
>
> Or another way of putting it is, is there a way for me to validate XML
> documents with Castor so that I find out about **all** problems, and not
> just the first one? I'm ok changing XML parsers, if that's what's
needed.
>
> -Steve
>
> ps – I'm using the latest version of Castor, and Xerces.
>
---------------------------------------------------------------------
To unsubscribe from this list, please visit:
http://xircles.codehaus.org/manage_email
