Msg.java

   1 package org.argeo.cms.i18n;
   2
   3 import java.lang.reflect.Field;
   4 import java.lang.reflect.Modifier;
   5
   6 import org.argeo.cms.CmsException;
   7 import org.argeo.cms.CmsSession;
   8 import org.eclipse.rap.rwt.RWT;
   9
  10 /** A single message to be internationalised. */
  11 public class Msg {
  12         private String id;
  13         private ClassLoader classLoader;
  14         private final Object defaultLocal;
  15
  16         public Msg() {
  17                 defaultLocal = null;
  18         }
  19
  20         public Msg(Object defaultMessage) {
  21                 this.defaultLocal = defaultMessage;
  22         }
  23
  24         public String getId() {
  25                 return id;
  26         }
  27
  28         public void setId(String id) {
  29                 this.id = id;
  30         }
  31
  32         public ClassLoader getClassLoader() {
  33                 return classLoader;
  34         }
  35
  36         public void setClassLoader(ClassLoader classLoader) {
  37                 this.classLoader = classLoader;
  38         }
  39
  40         public Object getDefault() {
  41                 return defaultLocal;
  42         }
  43
  44         public String toString() {
  45                 return local().toString();
  46         }
  47
  48         /** When used as the first word of a sentence. */
  49         public String lead() {
  50                 String raw = toString();
  51                 return raw.substring(0, 1).toUpperCase(RWT.getLocale())
  52                                 + raw.substring(1);
  53         }
  54
  55         public Object local() {
  56                 CmsSession cmSession = CmsSession.current.get();
  57                 Object local = cmSession.local(this);
  58                 if (local == null)
  59                         local = getDefault();
  60                 if (local == null)
  61                         throw new CmsException("No translation found for " + id);
  62                 return local;
  63         }
  64
  65         public static void init(Class<?> clss) {
  66                 final Field[] fieldArray = clss.getDeclaredFields();
  67                 ClassLoader loader = clss.getClassLoader();
  68
  69                 for (Field field : fieldArray) {
  70                         if (Modifier.isStatic(field.getModifiers())
  71                                         && field.getType().isAssignableFrom(Msg.class)) {
  72                                 try {
  73                                         Object obj = field.get(null);
  74                                         String id = clss.getCanonicalName() + "." + field.getName();
  75                                         obj.getClass().getMethod("setId", String.class)
  76                                                         .invoke(obj, id);
  77                                         obj.getClass()
  78                                                         .getMethod("setClassLoader", ClassLoader.class)
  79                                                         .invoke(obj, loader);
  80                                 } catch (Exception e) {
  81                                         throw new CmsException("Cannot prepare field " + field);
  82                                 }
  83                         }
  84                 }
  85         }
  86 }