import org.jdom.input.SAXBuilder;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import org.xml.sax.helpers.DefaultHandler;
import org.jdom.*;
import java.io.*;

public class JDOMValidator {
	public void validateSchema(String SchemaUrl, String XmlDocumentUrl) {
		try {      //Create SAXBuilder object
			SAXBuilder saxBuilder = new SAXBuilder(
					"org.apache.xerces.parsers.SAXParser", true);

                                      //Set SAXBuilder parser to be a validating parser 
			saxBuilder.setValidation(true);
			saxBuilder.setFeature(
				"http://apache.org/xml/features/validation/schema", true);
			saxBuilder.setFeature(
					"http://apache.org/xml/features/validation/schema-full-
                                                                   checking",true);
			saxBuilder.setProperty(
					"http://apache.org/xml/properties/schema/external-
                                                                   noNamespaceSchemaLocation",SchemaUrl);

                                      //Create a ErrorHandler and set ErrorHandler on parser.
			Validator handler = new Validator();
			saxBuilder.setErrorHandler(handler);
                                       //Parse XML Document
			saxBuilder.build(XmlDocumentUrl);
                                      //Output Validation Errors
			if (handler.validationError == true)
				System.out.println("XML Document has Error:"
						+ handler.validationError + " "
						+ handler.saxParseException.getMessage());
			else
				System.out.println("XML Document is valid");
		} catch (JDOMException jde) {
		}

		catch (IOException ioe) {
		}

	}

            //Error Handler class
	private class Validator extends DefaultHandler {
		public boolean validationError = false;

		public SAXParseException saxParseException = null;

		public void error(SAXParseException exception) throws SAXException {
			validationError = true;
			saxParseException = exception;
		}

		public void fatalError(SAXParseException exception) throws SAXException {
			validationError = true;
			saxParseException = exception;
		}

		public void warning(SAXParseException exception) throws SAXException {
		}
	}

	public static void main(String[] argv) {
		String SchemaUrl = "catalog.xsd";
		String XmlDocumentUrl = "catalog.xml";
		JDOMValidator validator = new JDOMValidator();
		validator.validateSchema(SchemaUrl, XmlDocumentUrl);

	}

}

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