question: public static DMLConfig readConfigurationFile ( String configPath ) throws ParseException , FileNotFoundException { DMLConfig config = new DMLConfig ( ) ; if ( configPath != null ) { try { config = new DMLConfig ( configPath , false ) ; } catch ( FileNotFoundException fnfe ) { LOG . error ( "Custom config file " + configPath + " not found." ) ; throw fnfe ; } catch ( ParseException e ) { throw e ; } } else { try { config = new DMLConfig ( DEFAULT_SYSTEMML_CONFIG_FILEPATH , false ) ; } catch ( FileNotFoundException fnfe ) { LOG . info ( "Using internal default configuration settings.  If you wish to " + "customize any settings, please supply a `SystemML-config.xml` file." ) ; config = new DMLConfig ( ) ; } catch ( ParseException e ) { throw e ; } } return config ; }
target:  Start with the internal default settings, then merge in the settings from any specified configuration file, if available. If it is not explicitly given, then merge in settings from the default configuration file location, if available.