specific/UiContext.java

   1 package org.argeo.eclipse.ui.specific;
   2
   3 import java.util.Locale;
   4
   5 import javax.servlet.http.HttpServletRequest;
   6 import javax.servlet.http.HttpServletResponse;
   7
   8 import org.eclipse.rap.rwt.RWT;
   9 import org.eclipse.swt.widgets.Display;
  10
  11 /** Singleton class providing single sources infos about the UI context. */
  12 public class UiContext {
  13         /** Can be null, thus indicating that we are not in a web context. */
  14         public static HttpServletRequest getHttpRequest() {
  15                 return RWT.getRequest();
  16         }
  17
  18         public static HttpServletResponse getHttpResponse() {
  19                 return RWT.getResponse();
  20         }
  21
  22         public static Locale getLocale() {
  23                 if (Display.getCurrent() != null)
  24                         return RWT.getUISession().getLocale();
  25                 else
  26                         return Locale.getDefault();
  27         }
  28
  29         public static void setLocale(Locale locale) {
  30                 if (Display.getCurrent() != null)
  31                         RWT.getUISession().setLocale(locale);
  32                 else
  33                         Locale.setDefault(locale);
  34         }
  35
  36         /** Can always be null */
  37         @SuppressWarnings("unchecked")
  38         public static <T> T getData(String key) {
  39                 Display display = getDisplay();
  40                 if (display == null)
  41                         return null;
  42                 return (T) display.getData(key);
  43         }
  44
  45         public static void setData(String key, Object value) {
  46                 Display display = getDisplay();
  47                 if (display == null)
  48                         throw new SingleSourcingException("Not display available in RAP context");
  49                 display.setData(key, value);
  50         }
  51
  52         private static Display getDisplay() {
  53                 return Display.getCurrent();
  54         }
  55
  56         private UiContext() {
  57         }
  58
  59 }