Use UIX demo 2.1.7 in my application

Question

Hello,
I have download uix-demo-2.1.7.zip and run Shopping Cart Demo.
It work very well. I would like to also have a preference page in my application, as in the demonstration.
I recovered the two files Preferences.java and Preferences.uix. I modified them to integrate them in my project.
The page is posted correctly, with value in the choice. But UIX does not react to any modificatin of appearance. Why?
It I miss what which is not documented.
Thanks, for your help.
Nathanael

Answer 1

Schmied -
I noticed one problem with the 2.1.7 version of the DemoUIFactory class - the Customization objects that it creates do not wrap the current Configuration instance. Instead, each Customization object delegates to the Configuration instance returned by Configuration.sharedInstance(). This means that you will lose any configuration settings specified in uix-config.xml.
Here is an updated version of the DemoUIFactory class which corrects this problem. Instead of callling Configuration.sharedInstance(), the Customization instances now wrap the current Configuration instance as returned by RenderingContext.getConfiguration():
** Copyright (c) Oracle Corporation 2000-2003. All Rights Reserved.
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package oracle.cabo.servlet.demo;
import java.io.PrintWriter;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpSession;
import javax.servlet.http.HttpSessionBindingEvent;
import javax.servlet.http.HttpSessionBindingListener;
import oracle.cabo.share.config.Configuration;
import oracle.cabo.share.config.ConfigurationImpl;
import oracle.cabo.share.config.Customization;
import oracle.cabo.ui.RenderingContext;
import oracle.cabo.ui.ServletRenderingContext;
import oracle.cabo.ui.UIConstants;
import oracle.cabo.servlet.BajaContext;
import oracle.cabo.servlet.Page;
import oracle.cabo.servlet.ui.BajaRenderingContext;
import oracle.cabo.servlet.ui.DefaultUIFactory;
import oracle.cabo.servlet.demo.shopcart.Preferences;
import oracle.cabo.style.StyleConstants;
import oracle.cabo.style.UserStyleSheet;
public class DemoUIFactory extends DefaultUIFactory
  public RenderingContext createRenderingContext(
    BajaContext context,
    PrintWriter out,
    Page        page,
    String      mimeType)
    BajaRenderingContext rContext =
      new BajaRenderingContext(context, out, page, mimeType);
    Customization customization = null;
    // Check to see if we are using user-specific styles
    UserStyleSheet userStyleSheet = Preferences.getUserStyleSheet(context);
    if (userStyleSheet != null)
      // Get the Customization object, creating it if necessary
      customization = _getCustomization(context, rContext);
      // Store the UserStyleSheet
      if (customization != null)
        customization.putProperty(customization.USER_STYLE_SHEET,
                                  userStyleSheet);
        rContext.setConfiguration(customization);
    return rContext;
  // Creates and registers the Customization object
  // for the current user
  private Customization _getCustomization(
    BajaContext      bajaContext,
    RenderingContext renderingContext
    // First, check to see if we've already got a Customization
    // instance for this user.
    HttpSession session = bajaContext.getServletRequest().getSession(true);
    // If we can't get an HttpSession, we can't create
    // user-specific customizations.
    if (session == null)
      return null;
    // Each Customization has a unique id.  Normally, this might
    // be some some user-specific identifer, such as the user's
    // login id.  Here, we don't have a login id, so instead we
    // just combine the HttpSession id with the name of the
    // Configuration object that we are wrapping to form a
    // unique id.
    Configuration config = renderingContext.getConfiguration();
    String id = _getCustomizationId(session, config);
    // Check to see if we have already registered a Customization
    // for this combination of HttpSession/Configuration
    ServletContext servletContext = _getServletContext(renderingContext);
    Customization customization = _getCustomization(servletContext, id);
    // If we already have a Customization, we're done!
    if (customization != null)
      return customization;
    // We don't have a Customization yet, so create it now
    customization = new Customization(id, config);
    // Register the customization to make sure that
    // it is available for subsequent requests
    customization.register(servletContext);
    // Finally, we store the Customization object on the
    // HttpSession.  We don't actually need to access the
    // Customization object via the HttpSession (we use
    // Configuration.getConfiguration()).  However, we
    // do want to unregister the Customization when the
    // HttpSession expires.  So, we wrap the Customization
    // object in an HttpSessionBindingListener which will
    // get called back when the sesssion expires - at which
    // point we can unregister the Customization object.
    CustomizationValue value = new CustomizationValue(customization);
    session.putValue(_CUSTOMIZATION_PROPERTY, value);
    return customization;
  // Returns the Customization object with the specified id
  private static Customization _getCustomization(
    ServletContext servletContext,
    String         id
    return (Customization)Configuration.getConfiguration(servletContext, id);
  // Creates the id for the Customization object for
  // the specified HttpSession/Configuration
  private static String _getCustomizationId(
    HttpSession   session,
    Configuration config
    // Just combine the ids for these two objects
    String sessionId = session.getId();
    String configName = config.getName();
    if (configName == null)
      configName = "null";
    return sessionId + configName;
  // Utility method for retrieving the ServletContext
  private static ServletContext _getServletContext(
    RenderingContext renderingContext
    return ServletRenderingContext.getServletContext(renderingContext);
  // An HttpSessionBindingListener that we use for storing our Customization
  // instance on the HttpSession.  It automatically unregisters the
  // Customization when the session times out
  private static class CustomizationValue implements HttpSessionBindingListener
    public CustomizationValue(Customization customization)
      _customization = customization;
    public Customization getCustomization()
      return _customization;
    public void valueUnbound(HttpSessionBindingEvent event)
      Customization customization = _customization;
      _customization = null;
      customization.unregister();
    // Who cares
    public void valueBound(HttpSessionBindingEvent event) {}
    private Customization _customization;
  private static final String _CUSTOMIZATION_PROPERTY = "customization";
}Andy