xml validation with the java 5

[Mihai Radulescu]

Hi

I try to validate a a XML file using the JAXP from java 5. My validation look like :

 
............
final DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance();
 
final DocumentBuilder builder = docFactory.newDocumentBuilder();
xmlDOM = builder.newDocument();
............
 
public void doTest() throws VisitorException, IOException, SAXException {
final Schema schema = buildValidationScheme(validationScheme);
final Validator validator = schema.newValidator();
validator.validate(new DOMSource(xmlDOM));
}
 
private Schema buildValidationScheme(String file) throws SAXException {
    SchemaFactory factory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
return factory.newSchema(new File(validationScheme));
}

but i run on a failure, on the root element.

I do something wrong ?

Regards,
M

[Ulf Dittmer]

What kind of failure? Is the document you're trying to validate actually valid according to the schema?

Sample code for Schema validation can also be found here.

[Mihai Radulescu]

Hi Ulf

Thanks for your answer. My problem is quite strange, I have an extern validation scheme - an xsd file and I try to validate with this scheme a Document. The Document is created at run time (it is not loaded from a file).
The next code snippet shows how I create the Document and its root node.

private Node buidRoot(Document document, String rootName) {
    final Element result = document.createElement(rootName);
    document.appendChild(result);
    return result;
}

My validation does not find the root. I get an exception like :
Exception in thread "main" org.xml.sax.SAXParseException: cvc-elt.1: Cannot find the declaration of element 'Parameterset'.

where the Parameterset is the name for my root.
Even more strange if I wrote the generated document in to a file and I reload it (with docBuilder.parse(new File(file)) ) it works.

Why I can not validate the run time generated document ?

Regards M

[Ulf Dittmer]

That's hard to say without seeing the XML and the Schema.

[Mihai Radulescu]

Hi

I post you only a simplified version of my scheme

<?xml version="1.0" encoding="UTF-8"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<xsd:annotation>
<xsd:documentation>Schema for Project PDC</xsd:documentation>
</xsd:annotation>
<!--____ Parameters _____-->
<xsd:element name="Parameterset">
<xsd:complexType>
<xsd:sequence>
<xsd:element ref="Parameter" maxOccurs="unbounded"/>
</xsd:sequence>
</xsd:complexType>
</xsd:element>
</xsd:schema>

Regards,
M
[ July 11, 2007: Message edited by: Mihai Radulescu ]

[Rahul Bhattacharjee]

Is it picking this XSD for validation?

[Ugender Rekulampally]

I am not sure this is considerable or not but you have mis spelled your method ( missing 'l' in buildRoot method name)..

private Node buidRoot(Document document, String rootName)

Thanks,
Ugender

[Mihai Radulescu]

Hi guys,

Rahul, yes I use the XSD file for validation. The file is pretty big that why I post just one snippet. This sniper is enough to generate the SAXException (because it does not find the root node).

Ugender, thanks for tip.

In the mean time I do some research and I find a solution for my problem but I still can not explain it. It is like this : if I create the DOM document at run time and I validate it I get a SAXException but if I serialize the DOM in to a file and I parse this file back in to a DOM document, the validation works with the new parsed DOM. Quite strange.
This lead me to a conclusion - the DOM build at run time is wrong, but I don't see any error.
How about you guys ?

Regards,
M