Schema validation of a DOM Document instance

[Taras Tielkes <ta...@info.nl>]

Hi,

I have an instance of Document in memory. I know Xerces 1.x cannot directly
validate a DOM.

Is it possible to generate a stream of SAX events from the DOM, and somehow
validate *that* against a Schema?

For instance, the DOM2SAX class in the Xalan jar will translate a DOM into
SAX events, but as far as I see there is no way to  include Schema
validation in that process.

Thanks in advance for any suggestions,

// tt

---------------------------------------------------------------------
To unsubscribe, e-mail: xerces-j-user-unsubscribe@xml.apache.org
For additional commands, e-mail: xerces-j-user-help@xml.apache.org

RE: Schema validation of a DOM Document instance

[Doug Helton <dh...@ideorlando.org>]

Hi Taras,

	Even though the DOM is in memory you can stil validate it.  At least you
can if you are using xerces 1.4.3.

It is a round about way but it still works.

you can serialize the DOM then create a inputSource to pass to the parser
after setting the parser to validate against the schema.


            parser.setFeature("http://xml.org/sax/features/validation",
true);

parser.setFeature("http://apache.org/xml/features/validation/schema", true);

parser.setFeature("http://apache.org/xml/features/validation/schema-full-che
cking", true);

parser.setFeature("http://apache.org/xml/features/validation/warn-on-duplica
te-attdef",true);

parser.setFeature("http://apache.org/xml/features/validation/warn-on-undecla
red-elemdef",true);


Here is an example:

        // The below code converts the DOcument Object to a String
		StringReader strReader = null;
        OutputFormat outputFormat = new OutputFormat();
        StringWriter  stringOut = new StringWriter();
        XMLSerializer serial = null;
        this.errorCount = 0;

        outputFormat.setIndenting(true);
        outputFormat.setOmitComments(false);
        outputFormat.setOmitDocumentType(false);
        outputFormat.setOmitXMLDeclaration(false);
        outputFormat.setEncoding("US-ASCII");
        serial    = new XMLSerializer(stringOut, outputFormat);
        serial.asDOMSerializer();
        serial.serialize(doc);

        strReader = new StringReader(stringOut.toString());
	  InputSource source = new InputSource(strReader)
	  parser.parse(source);


-----Original Message-----
From: Taras Tielkes [mailto:taras@info.nl]
Sent: Wednesday, November 14, 2001 9:46 AM
To: Xerces-J-User (E-mail)
Subject: Schema validation of a DOM Document instance


Hi,

I have an instance of Document in memory. I know Xerces 1.x cannot directly
validate a DOM.

Is it possible to generate a stream of SAX events from the DOM, and somehow
validate *that* against a Schema?

For instance, the DOM2SAX class in the Xalan jar will translate a DOM into
SAX events, but as far as I see there is no way to  include Schema
validation in that process.

Thanks in advance for any suggestions,

// tt

---------------------------------------------------------------------
To unsubscribe, e-mail: xerces-j-user-unsubscribe@xml.apache.org
For additional commands, e-mail: xerces-j-user-help@xml.apache.org


---------------------------------------------------------------------
To unsubscribe, e-mail: xerces-j-user-unsubscribe@xml.apache.org
For additional commands, e-mail: xerces-j-user-help@xml.apache.org