RelaxNG validation with error messages

relaxng.java

package sardina;

import com.thaiopensource.util.PropertyMapBuilder;
import com.thaiopensource.validate.Flag;
import com.thaiopensource.validate.ValidateProperty;
import com.thaiopensource.validate.ValidationDriver;
import com.thaiopensource.validate.prop.rng.RngProperty;
import com.thaiopensource.validate.rng.CompactSchemaReader;
import org.xml.sax.ErrorHandler;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;

import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;

class MyErrorHandler implements ErrorHandler {
    public void warning(SAXParseException e) throws SAXParseException {
        printException(e);
    }

    public void error(SAXParseException e) {
        printException(e);
    }

    public void fatalError(SAXParseException e) throws SAXParseException {
        printException(e);
        throw e;
    }

    private void printException(SAXParseException e) {
        System.out.println("message: " + e.getMessage());
        System.out.println("systemId: " + e.getSystemId());
        System.out.println("line: " + e.getLineNumber());
        System.out.println("column: " + e.getColumnNumber());

        Exception sub = e.getException();
        if (sub != null) {
            System.out.println("exception: " + sub.getMessage());
        }
    }
}

public class App {
    public static void main(String[] args) throws URISyntaxException, IOException, SAXException {
        URI xmlFile = ClassLoader.getSystemClassLoader().getResource("file.xml").toURI();

        PropertyMapBuilder pmb = new PropertyMapBuilder();
        pmb.put(RngProperty.CHECK_ID_IDREF, Flag.PRESENT);
        pmb.put(ValidateProperty.ERROR_HANDLER, new MyErrorHandler());

        URI rngFile = ClassLoader.getSystemClassLoader().getResource("topic.rnc").toURI();
        InputSource inputSource = ValidationDriver.uriOrFileInputSource(rngFile.toString());
        inputSource.setEncoding("UTF-8");

        ValidationDriver driver = new ValidationDriver(pmb.toPropertyMap(), CompactSchemaReader.getInstance());
        driver.loadSchema(inputSource);

        boolean result = driver.validate(ValidationDriver.uriOrFileInputSource(xmlFile.toString()));
        System.out.println(result);
    }
}