public SolrConfig() throws ParserConfigurationException, IOException, SAXException {
  this((SolrResourceLoader)null,DEFAULT_CONF_FILE,null);
}

public SolrConfig ( ) throws ParserConfigurationException , IOException , SAXException { this ( ( SolrResourceLoader ) null , DEFAULT_CONF_FILE , null ) ; }
creates a default instance from the solrconfig . xml .
