package com.huey.hello.sax;

import java.io.InputStream;

import java.io.StringWriter;

import org.xml.sax.Attributes;

import org.xml.sax.InputSource;

import org.xml.sax.SAXException;

import org.xml.sax.XMLReader;

import org.xml.sax.helpers.DefaultHandler;

import org.xml.sax.helpers.XMLReaderFactory;

public class MySAXApp extends DefaultHandler {

    private StringWriter writer;

    public MySAXApp() {

        super();

    }

    public static void main(String args[]) throws Exception {

        XMLReader xr = XMLReaderFactory.createXMLReader();

        MySAXApp handler = new MySAXApp();

        xr.setContentHandler(handler);

        xr.setErrorHandler(handler);

        InputStream inStream = MySAXApp.class.getResourceAsStream("/files/hello.xml");

        InputSource inSource = new InputSource(inStream);

        xr.parse(inSource);

    }

    @Override

    public void startDocument() throws SAXException {

        writer = new StringWriter();

    }

    @Override

    public void endDocument() throws SAXException {

        System.out.println(writer.toString());

    }

    @Override

    public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {

        writer.append('<').append(qName);

        for (int i = 0; i < attributes.getLength(); i++) {

            writer.append(' ')

                .append(attributes.getLocalName(i))

                .append('=').append('"')

                .append(attributes.getValue(i))

                .append('"');

        }

        writer.append('>');

    }    

    @Override

    public void endElement(String uri, String localName, String qName) throws SAXException {

        writer.append("</").append(qName).append('>');

    }

    @Override

    public void characters(char[] ch, int start, int length) throws SAXException {

        String text = new String(ch, start, length);

        writer.append(text);

    }

}