How to use

ConstantsWithLookup

in

com.google.gwt.i18n.client

 public final String get(String key) {
  try {
   // Replace "." with "_" in the key to match what ConstantsImplCreator
   // does.
   return key == null ? null : messages.getString(key.replace(".", "_"));
  } catch (MissingResourceException e) {
   return null;
  }
 }
}

 public final String get(String key) {
  try {
   // Replace "." with "_" in the key to match what ConstantsImplCreator
   // does.
   return key == null ? null : messages.getString(key.replace(".", "_"));
  } catch (MissingResourceException e) {
   return null;
  }
 }
}

 public final String get(String key) {
  try {
   // Replace "." with "_" in the key to match what ConstantsImplCreator
   // does.
   return key == null ? null : messages.getString(key.replace(".", "_"));
  } catch (MissingResourceException e) {
   return null;
  }
 }
}

sValue = rStrings.getString(sKey);

 /**
  * get localized message for key.
  *
  * @param pkey key of message
  * @return localized text for the key
  */
 public final String get(final String pkey) {
  try {
   // Replace "." with "_" in the key to match what ConstantsImplCreator does.
   return pkey == null ? null : messages.getString(pkey.replace(".", "_"));
  } catch (final MissingResourceException e) {
   return null;
  }
 }
}

public String findMessage(Class<?> propertyType, String key) {
  if (key == null) {
    return null;
  }
  Class<?> typeToLookup = propertyType == null ? Object.class : propertyType;
  String label = null;
  while (typeToLookup != null && label == null) {
    try {
      ConstantsWithLookup constants = this.constantRegistry.get(typeToLookup);
      if (constants != null) {
        label = constants.getString(key);
      }
    } catch (MissingResourceException exc) {
      label = null;
    }
    typeToLookup = typeToLookup.getSuperclass();
  }
  return label;
}

public String findMessage(Class<?> propertyType, String key) {
  if (key == null) {
    return null;
  }
  Class<?> typeToLookup = propertyType == null ? Object.class : propertyType;
  String label = null;
  while (typeToLookup != null && label == null) {
    try {
      ConstantsWithLookup constants = this.constantRegistry.get(typeToLookup);
      if (constants != null) {
        label = constants.getString(key);
      }
    } catch (MissingResourceException exc) {
      label = null;
    }
    typeToLookup = typeToLookup.getSuperclass();
  }
  return label;
}

  private String getMessage(Throwable error, String suffix, String defaultMessage) {
    if (this.constants == null) {
      return defaultMessage;
    }
    try {
      String className = error.getClass().getSimpleName();
      if (error instanceof CommandException) {
        className = ((CommandException) error).getCauseSimpleClassName();
      }
      String methodName = CaseFormat.UPPER_CAMEL.to(CaseFormat.LOWER_CAMEL, className) + suffix;
      return this.constants.getString(methodName);
    } catch (MissingResourceException exc) {
      return defaultMessage;
    }
  }
}

  private String getMessage(Throwable error, String suffix, String defaultMessage) {
    if (this.constants == null) {
      return defaultMessage;
    }
    try {
      String className = error.getClass().getSimpleName();
      if (error instanceof CommandException) {
        className = ((CommandException) error).getCauseSimpleClassName();
      }
      String methodName = CaseFormat.UPPER_CAMEL.to(CaseFormat.LOWER_CAMEL, className) + suffix;
      return this.constants.getString(methodName);
    } catch (MissingResourceException exc) {
      return defaultMessage;
    }
  }
}

protected String getErrorMessage(StatusCodeException exception) {
  try {
    return this.constants.getString(this.constantsPrefix + exception.getStatusCode());
  } catch (MissingResourceException exc) {
    return exception.getStatusText();
  }
}

protected String getErrorMessage(StatusCodeException exception) {
  try {
    return this.constants.getString(this.constantsPrefix + exception.getStatusCode());
  } catch (MissingResourceException exc) {
    return exception.getStatusText();
  }
}

  errorMsg = errorMsg.replace('.', '_');
String errorsString = errors.getString(errorMsg);
if (errorsString != null) {
  ret = errorsString.replace("\n", "<br/>"); //$NON-NLS-1$ //$NON-NLS-2$