DaizyDiff sample usage

DaizyDiff.java

import java.io.InputStream;
import java.io.StringWriter;
import java.net.URISyntaxException;
import java.util.Locale;

import javax.xml.transform.TransformerFactory;
import javax.xml.transform.sax.SAXTransformerFactory;
import javax.xml.transform.sax.TransformerHandler;
import javax.xml.transform.stream.StreamResult;

import org.outerj.daisy.diff.DaisyDiff;
import org.outerj.daisy.diff.HtmlCleaner;
import org.outerj.daisy.diff.html.HTMLDiffer;
import org.outerj.daisy.diff.html.HtmlSaxDiffOutput;
import org.outerj.daisy.diff.html.TextNodeComparator;
import org.outerj.daisy.diff.html.dom.DomTreeBuilder;
import org.xml.sax.InputSource;
import org.xml.sax.helpers.AttributesImpl;

public class DaizyDiff{
	
	private String diff(String s1, String s2) {

		try {
			SAXTransformerFactory tf = (SAXTransformerFactory) TransformerFactory.newInstance();

			TransformerHandler result = tf.newTransformerHandler();
			StringWriter resultWriter = new StringWriter();
			result.setResult(new StreamResult(resultWriter));

			result.startDocument();
			String tag = Long.toString(System.currentTimeMillis(), 3);
			result.startElement("", tag, tag, new AttributesImpl());
			DaisyDiff.diffTag(s1, s2, result);

			result.endDocument();
			result.endElement("", tag, tag);
			String string = resultWriter.toString();
			return string.substring(string.indexOf("<"+tag+">")+tag.length()+2, string.indexOf("</"+tag+">"));
		} catch (Throwable e) {
			throw new RuntimeException(e);
		}
	}

	private String diff(InputStream html1, InputStream html2) {
		try {
			SAXTransformerFactory tf = (SAXTransformerFactory) TransformerFactory.newInstance();

			TransformerHandler result = tf.newTransformerHandler();
			StringWriter resultWriter = new StringWriter();
			result.setResult(new StreamResult(resultWriter));

			Locale locale = Locale.getDefault();
			String prefix = "diff";

			HtmlCleaner cleaner = new HtmlCleaner();

			InputSource oldSource = new InputSource(html1);
			InputSource newSource = new InputSource(html2);

			DomTreeBuilder oldHandler = new DomTreeBuilder();
			cleaner.cleanAndParse(oldSource, oldHandler);
			TextNodeComparator leftComparator = new TextNodeComparator(oldHandler, locale);

			DomTreeBuilder newHandler = new DomTreeBuilder();
			cleaner.cleanAndParse(newSource, newHandler);
			TextNodeComparator rightComparator = new TextNodeComparator(newHandler, locale);

			result.startDocument();
			result.startElement("", "html", "html", new AttributesImpl());
			result.startElement("", "head", "head", new AttributesImpl());

			AttributesImpl cssLinkAttrs = new AttributesImpl();
			cssLinkAttrs.addAttribute("", "href", "href", "", "css/diff.css");
			cssLinkAttrs.addAttribute("", "type", "type", "", "text/css");
			cssLinkAttrs.addAttribute("", "rel", "rel", "", "stylesheet");
			result.startElement("", "link", "link", cssLinkAttrs);

			result.endElement("", "head", "head");
			result.startElement("", "body", "body", new AttributesImpl());
			HtmlSaxDiffOutput output = new HtmlSaxDiffOutput(result, prefix);

			HTMLDiffer differ = new HTMLDiffer(output);
			differ.diff(leftComparator, rightComparator);

			result.endElement("", "body", "body");
			result.endElement("", "html", "html");
			result.endDocument();
			return resultWriter.toString();
		} catch (Throwable e) {
			throw new RuntimeException(e);
		}
	}
}