public TranslationTableFactory.ContextRule buildContext(TranslationTableFactory.ContextRule lastContext,
    String context) 
{
    if (lastContext == null)
    {
      return (ContextRule) contexts.get (context);
    }
    if (lastContext.isMappingDefined())
    {
      throw new IllegalArgumentException("Unresolved mapping found.");
    }
    ContextRule nextContext = (ContextRule)
        contexts.get(lastContext.getName() + "." + context);
    if (nextContext == null)
    {
      Log.debug ("Undefined mapping: " + lastContext.getName() + " - > " + context);
      return null;
    }
    while (nextContext.isMappingDefined())
    {
      nextContext = (ContextRule) contexts.get(nextContext.getMapTo());
    }
    return nextContext;
}

Builds a context based on the given last context and the new context name. If no last context is given, the context is considered to be an initial context.

 public static synchronized TranslationTableFactory getInstance() 
{
    if (singleton == null)
    {
      singleton = new TranslationTableFactory();
    }
    return singleton;
}

Returns the singleton instance of this factory.

 public TranslationTable getTranslationTable(TranslationTableFactory.ContextRule rule) 
{
    return new TranslationTable(translations, rule.getName());
}

Creates a mapping for the given rule.