XmlPatch.java

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import java.net.MalformedURLException;
import java.net.URL;
import org.jdom.*;
import org.jdom.input.SAXBuilder;
import org.jdom.output.XMLOutputter;
import org.vmguys.vmtools.ota.OtaUpdate;
import org.vmguys.vmtools.ota.UniqueId;
import org.vmguys.vmtools.utils.*;
import javax.xml.parsers.SAXParser;

/**
 * This is an application that uses OtaUpdate to apply an OTA
 * update request to an XML URL to generate the updated version.
 * The output is written to stdout.
 */
public class XmlPatch {
	// Creates an instance of the class, opens the files, and calls the go method.

	public static void main(String[] args) {
		if (args.length == 2) {
			try{
				URL originalURL = new URL(args[0]);
				URL updateURL   = new URL(args[1]);
				new XmlPatch().go(originalURL, updateURL);

			} catch (MalformedURLException mux) {
				System.err.println(mux);
			}
		}
		else {
			System.err.println("usage: XmlPatch <XmlURL> <UpdateRequestURL>");
		}
	}

	/**
	 * Reads the XML URLs to create a JDOM tree, then uses OtaUpdate
	 * to generate the OTA update request.
	 */
	private void go(URL originalURL, URL updateURL) {
		try {
			SAXBuilder sb = new SAXBuilder();

			Document originalDoc = sb.build(originalURL);
			Document updateDoc   = sb.build(updateURL);

			OtaUpdate gu = new OtaUpdate(false);
			UniqueId id = new UniqueId("Profile", "12345");

			Element newDoc = gu.applyDiffs(originalDoc.getRootElement(), updateDoc.getRootElement());

			XMLOutputter xmlo = new XMLOutputter("  ", true);
			xmlo.setTextNormalize(true);

			xmlo.output(newDoc, System.out);
			System.out.println();
		}
		catch (Exception e) {
			e.printStackTrace();
		}
	}
}