import java.io.InputStream;
import java.io.OutputStream;
import com.ximpleware.VTDGen;
import com.ximpleware.VTDNav;
import com.ximpleware.XMLModifier;

OutputStream objectFileOutputStream = null;
try {
    // Get the value from context variable
	String generatedOnServerName = (String) context.get("setVariable");

	VTDGen vg = new VTDGen(); // Instantiate VTDGen
	XMLModifier xm = new XMLModifier(); // Instantiate XMLModifier
	//Read the input stream 
	byte[] data = new byte[inputStream.available()];
	inputStream.read(data);
	vg.setDoc(data);
	vg.parse(false);
	VTDNav vn = vg.getNav();
	xm.bind(vn);

	// first update the value of attr
	int i = vn.getAttrVal("attr");
	if (i != -1) {
		xm.updateToken(i, "value");
	}

	// navigate to <a> Tag Name where tag will be added
	if (vn.toElement(VTDNav.FC, "XFRDOCS")) {
		// update the text content of <a>
		i = vn.getText();
		if (i != -1) {
			xm.updateToken(i, " new content ");
		}
		// insert an element before <a> (which is the cursor
		// element)

		xm.insertBeforeElement("\n\t<generatedOnServerName>"
				+ generatedOnServerName
				+ "</generatedOnServerName>");

	}
	objectFileOutputStream = service.getOutputStream();
	xm.output(objectFileOutputStream);
} catch (Exception e) {
	e.printStackTrace();
	throw e;
}