XML Validation using EntityResolver

Praveen Peddi Wed, 22 Jan 2003 10:25:43 -0800

I am trying to validate the xml using the schema which is present locally in the memory. My method looks as follows:

public static void validateXmlAgainstLocalSchema(String XMLString, String schemaString) throws SAXException{
   long startTime = System.currentTimeMillis();
            System.out.println("Files: XML:" + XMLString + " XSD:" + schemaString);
            XMLReader parser = null;
            // Instantiate a parser
            try{
                parser = XMLReaderFactory.createXMLReader("org.apache.xerces.parsers.SAXParser");
            } catch (org.xml.sax.SAXException ex){
                System.out.println("SAXException Exception");
    throw new SAXException("Error Obtaining the parser.");
            }

try{

// Register the error handler
parser.setErrorHandler(new SchemaErrorHandler());

                //parser.setFeature("http://apache.org/xml/features/continue-after-fatal-error", true);
                // Turn on validation
                parser.setFeature("http://xml.org/sax/features/namespaces",true);
                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-checking",true);
                //parser.setProperty("http://apache.org/xml/properties/schema/external-noNamespaceSchemaLocation",Schema);
    parser.setEntityResolver(new SchemaEntityResolver(schemaString));

            } catch (org.xml.sax.SAXNotRecognizedException ex){
    ex.printStackTrace();
                    System.out.println("SAXNotRecognizedException Exception");
            } catch (org.xml.sax.SAXNotSupportedException ex){
    ex.printStackTrace();
                    System.out.println("SAXNotSupportedException Exception");
            }

            // Parse the document
            try{
                //String XMLSystemId = new File(XMLString).toURL().toExternalForm();
                parser.parse(new InputSource(new StringReader(XMLString)));
    //parser.parse(XMLSystemId);
                System.out.println("Parsed Successfully by SAX Parser");
            } catch (org.xml.sax.SAXException ex){
                System.out.println("SAXException Exception");
    throw new SAXException("Error Validating the content XML.");
            } catch (java.io.IOException ex){
                System.out.println("IOException Exception");
    throw new SAXException("Error Validating the content XML.");
            } finally {
   long endTime = System.currentTimeMillis();
        System.out.println("Total time of SAXValidate:"+(endTime-startTime));
   }
    }//SAXValidate

And SchemaEntityResolver looks as follows:

public class SchemaEntityResolver implements EntityResolver {
InputSource source = null;
public SchemaEntityResolver(String schemaString) {
  source = new InputSource(new StringReader(schemaString));
}

    public InputSource resolveEntity(String publicID, String systemID)
        throws SAXException {
            return source;
    }
}

When I try to validate an xml with the schema string, I get the following error:

Line: 1
URI: null
Message: cvc-elt.1: Cannot find the declaration of element 'content'.

Am I doing it wrong? If so please tell me how to use the entityresolver.

Praveen

XML Validation using EntityResolver

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