Main.java Source code

Introduction

Here is the source code for Main.java

Source

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;

import org.xml.sax.ErrorHandler;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import org.xml.sax.XMLReader;

public class Main {

    // validate using DOM (DTD as defined in the XML)
    public static boolean validateWithDTDUsingDOM(String xml) throws Exception {
        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
        factory.setValidating(true);
        factory.setNamespaceAware(true);

        DocumentBuilder builder = factory.newDocumentBuilder();

        builder.setErrorHandler(new ErrorHandler() {
            public void warning(SAXParseException e) throws SAXException {
                System.out.println("WARNING : " + e.getMessage()); // do nothing
            }

            public void error(SAXParseException e) throws SAXException {
                System.out.println("ERROR : " + e.getMessage());
                throw e;
            }

            public void fatalError(SAXParseException e) throws SAXException {
                System.out.println("FATAL : " + e.getMessage());
                throw e;
            }
        });
        builder.parse(new InputSource(xml));
        return true;
    }

    // validate using SAX (DTD as defined in the XML)
    public static boolean validateWithDTDUsingSAX(String xml) throws Exception {
        SAXParserFactory factory = SAXParserFactory.newInstance();
        factory.setValidating(true);
        factory.setNamespaceAware(true);

        SAXParser parser = factory.newSAXParser();
        XMLReader reader = parser.getXMLReader();
        reader.setErrorHandler(new ErrorHandler() {
            public void warning(SAXParseException e) throws SAXException {
                System.out.println("WARNING : " + e.getMessage()); // do nothing
            }

            public void error(SAXParseException e) throws SAXException {
                System.out.println("ERROR : " + e.getMessage());
                throw e;
            }

            public void fatalError(SAXParseException e) throws SAXException {
                System.out.println("FATAL : " + e.getMessage());
                throw e;
            }
        });
        reader.parse(new InputSource(xml));
        return true;
    }

    public static void main(String args[]) throws Exception {
        System.out.println(validateWithDTDUsingDOM("c:/temp/howto.xml"));
        System.out.println(validateWithDTDUsingSAX("c:/temp/howto.xml"));
    }
}