org.argeo.cms/src/org/argeo/cms/Msg.java

   1 package org.argeo.cms;
   2
   3 import java.lang.reflect.Field;
   4 import java.lang.reflect.Modifier;
   5
   6 import org.eclipse.rap.rwt.RWT;
   7
   8 /** A single message to be internationalised. */
   9 public class Msg {
  10         private String id;
  11         private ClassLoader classLoader;
  12         private final Object defaultLocal;
  13
  14         public Msg() {
  15                 defaultLocal = null;
  16         }
  17
  18         public Msg(Object defaultMessage) {
  19                 this.defaultLocal = defaultMessage;
  20         }
  21
  22         public String getId() {
  23                 return id;
  24         }
  25
  26         public void setId(String id) {
  27                 this.id = id;
  28         }
  29
  30         public ClassLoader getClassLoader() {
  31                 return classLoader;
  32         }
  33
  34         public void setClassLoader(ClassLoader classLoader) {
  35                 this.classLoader = classLoader;
  36         }
  37
  38         public Object getDefault() {
  39                 return defaultLocal;
  40         }
  41
  42         public String toString() {
  43                 return local().toString();
  44         }
  45
  46         /** When used as the first word of a sentence. */
  47         public String lead() {
  48                 String raw = toString();
  49                 return raw.substring(0, 1).toUpperCase(RWT.getLocale())
  50                                 + raw.substring(1);
  51         }
  52
  53         public Object local() {
  54                 CmsSession cmSession = CmsSession.current.get();
  55                 Object local = cmSession.local(this);
  56                 if (local == null)
  57                         local = getDefault();
  58                 if (local == null)
  59                         throw new CmsException("No translation found for " + id);
  60                 return local;
  61         }
  62
  63         public static void init(Class<?> clss) {
  64                 final Field[] fieldArray = clss.getDeclaredFields();
  65                 ClassLoader loader = clss.getClassLoader();
  66
  67                 for (Field field : fieldArray) {
  68                         if (Modifier.isStatic(field.getModifiers())
  69                                         && field.getType().isAssignableFrom(Msg.class)) {
  70                                 try {
  71                                         Object obj = field.get(null);
  72                                         String id = clss.getCanonicalName() + "." + field.getName();
  73                                         obj.getClass().getMethod("setId", String.class)
  74                                                         .invoke(obj, id);
  75                                         obj.getClass()
  76                                                         .getMethod("setClassLoader", ClassLoader.class)
  77                                                         .invoke(obj, loader);
  78                                 } catch (Exception e) {
  79                                         throw new CmsException("Cannot prepare field " + field);
  80                                 }
  81                         }
  82                 }
  83         }
  84 }