private static Optional fileExtension()

in commons-rdf-simple/src/main/java/org/apache/commons/rdf/simple/experimental/AbstractRDFParser.java [509:520]

• 12 lines of code
• 3 McCabe index (conditional complexity)

    private static Optional<String> fileExtension(final Path path) {
        final Path fileName = path.getFileName();
        if (fileName == null) {
            return Optional.empty();
        }
        final String filenameStr = fileName.toString();
        final int last = filenameStr.lastIndexOf(".");
        if (last > -1) {
            return Optional.of(filenameStr.substring(last));
        }
        return Optional.empty();
    }