UiContext.java

   1 package org.argeo.eclipse.ui.specific;
   2
   3 import java.util.Locale;
   4
   5 import javax.servlet.http.HttpServletRequest;
   6
   7 import org.eclipse.rap.rwt.RWT;
   8 import org.eclipse.swt.widgets.Display;
   9
  10 /** Singleton class providing single sources infos about the UI context. */
  11 public class UiContext {
  12         /** Can be null, thus indicating that we are not in a web context. */
  13         public static HttpServletRequest getHttpRequest() {
  14                 return RWT.getRequest();
  15         }
  16
  17         public static Locale getLocale() {
  18                 if (Display.getCurrent() != null)
  19                         return RWT.getUISession().getLocale();
  20                 else
  21                         return Locale.getDefault();
  22         }
  23
  24         public static void setLocale(Locale locale) {
  25                 if (Display.getCurrent() != null)
  26                         RWT.getUISession().setLocale(locale);
  27                 else
  28                         Locale.setDefault(locale);
  29         }
  30
  31         /** Can always be null */
  32         @SuppressWarnings("unchecked")
  33         public static <T> T getData(String key) {
  34                 Display display = getDisplay();
  35                 if (display == null)
  36                         return null;
  37                 return (T) display.getData(key);
  38         }
  39
  40         public static void setData(String key, Object value) {
  41                 Display display = getDisplay();
  42                 if (display == null)
  43                         throw new SingleSourcingException(
  44                                         "Not display available in RAP context");
  45                 display.setData(key, value);
  46         }
  47
  48         private static Display getDisplay() {
  49                 return Display.getCurrent();
  50         }
  51
  52         private UiContext() {
  53         }
  54
  55 }