package liquibase.util.ui;

 import java.lang.reflect.Constructor;

 public class UIFactory {

     private static final String UI_IMPL_CLASSNAME = "liquibase.util.ui.SwingUIFacade";

     private static UIFactory instance = new UIFactory();

     private UIFacade facade; // = new SwingUIFacade();

     public static UIFactory getInstance() {

         return instance;

     }

     @SuppressWarnings("unchecked")

     public UIFacade getFacade() {

         if (facade == null) {

             ClassLoader cl = UIFacade.class.getClassLoader();

             try {

                 Class<UIFacade> swingUIClazz = (Class<UIFacade>) cl.loadClass(UI_IMPL_CLASSNAME);

                 Constructor<UIFacade> con = swingUIClazz.getConstructor(new Class[0]);

                 facade = con.newInstance(new Object[0]);

             } catch (Exception e) {

                 // Should never happen as class exists

                 throw new RuntimeException(e);

             }

         }

         return facade;

     }

     public void setFacade(UIFacade facade) {

         this.facade = facade;

     }

 }