Map<String, Object> params = getParameters();
MultiFileBuilderParametersImpl multiParams =
MultiFileBuilderParametersImpl.fromParameters(params, true);
if (multiParams.getFilePattern() == null)
{
throw new ConfigurationException("No file name pattern is set!");
}
String fileName = fetchFileName(multiParams);
FileBasedConfigurationBuilder<T> builder =
getManagedBuilders().get(fileName);