public static File parseParametersForWritableDirectory ( Map < String , String > parameters , String parameterName ) throws JournalException { String directoryString = parameters . get ( parameterName ) ; if ( directoryString == null ) { throw new JournalException ( "'" + parameterName + "' is required." ) ; } File directory = new File ( directoryString ) ; if ( ! directory . exists ( ) ) { throw new JournalException ( "Directory '" + directory + "' does not exist." ) ; } if ( ! directory . isDirectory ( ) ) { throw new JournalException ( "Directory '" + directory + "' is not a directory." ) ; } if ( ! directory . canWrite ( ) ) { throw new JournalException ( "Directory '" + directory + "' is not writable." ) ; } return directory ; }
Look in the parameters for the path to a writable directory . The parameter is required .