protected Formatter() 
{

}

Construct a new formatter.

 abstract public String format(LogRecord record)
Format the given log record and return the formatted string.

The resulting formatted String will normally include a
localized and formated version of the LogRecord's message field.
It is recommended to use the Formatter#formatMessage 
convenience method to localize and format the message field.

 public synchronized String formatMessage(LogRecord record) 
{
        String format = record.getMessage();
        java.util.ResourceBundle catalog = record.getResourceBundle();
        if (catalog != null) {
            try {
                format = catalog.getString(record.getMessage());
            } catch (java.util.MissingResourceException ex) {
                // Drop through.  Use record message as format
                format = record.getMessage();
            }
        }
        // Do the formatting.
        try {
            Object parameters[] = record.getParameters();
            if (parameters == null || parameters.length == 0) {
                // No parameters.  Just return format string.
                return format;
            }
            // Is it a java.text style format?
            // Ideally we could match with
            // Pattern.compile("\\{\\d").matcher(format).find())
            // However the cost is 14% higher, so we cheaply check for
            // 1 of the first 4 parameters
            if (format.indexOf("{0")  >= 0 || format.indexOf("{1")  >=0 ||
                        format.indexOf("{2")  >=0|| format.indexOf("{3")  >=0) {
                return java.text.MessageFormat.format(format, parameters);
            }
            return format;
        } catch (Exception ex) {
            // Formatting failed: use localized format string.
            return format;
        }
}

Localize and format the message string from a log record. This method is provided as a convenience for Formatter subclasses to use when they are performing formatting.

The message string is first localized to a format string using the record's ResourceBundle. (If there is no ResourceBundle, or if the message key is not found, then the key is used as the format string.) The format String uses java.text style formatting.

• If there are no parameters, no formatter is used.
• Otherwise, if the string contains "{0" then java.text.MessageFormat is used to format the string.
• Otherwise no formatting is performed.

 public String getHead(Handler h) 
{
        return "";
}

Return the header string for a set of formatted records.

This base class returns an empty string, but this may be overriden by subclasses.

 public String getTail(Handler h) 
{
        return "";
}

Return the tail string for a set of formatted records.

This base class returns an empty string, but this may be overriden by subclasses.