JSF, Ajax and file download

Today i show you a example which combines Ajax (Richfaces) and a “normal” Download in a JSF application.
The bean for the download-code is here:

public class DownloadBean {

// actionListener="#{bean.execute}"
public void execute (ActionEvent event) {
download();
}

// action="#{bean.download}"
public String download() {
final FacesContext [...]