public static Set unreleasedDirectoryVersionMajors()

in log4j-changelog/src/main/java/org/apache/logging/log4j/changelog/ChangelogFiles.java [37:53]

• 14 lines of code
• 2 McCabe index (conditional complexity)

    public static Set<Integer> unreleasedDirectoryVersionMajors(final Path changelogDirectory) {
        return FileUtils.findAdjacentFiles(changelogDirectory, false, paths -> paths
                .flatMap(path -> {

                    // Only select directories matching with the `^\.(\d+)\.x\.x$` pattern
                    final Pattern versionPattern = Pattern.compile("^\\.(\\d+)\\.x\\.x$");
                    final Matcher versionMatcher = versionPattern.matcher(path.getFileName().toString());
                    if (!versionMatcher.matches()) {
                        return Stream.empty();
                    }
                    final String versionMajorString = versionMatcher.group(1);
                    final int versionMajor = Integer.parseInt(versionMajorString);
                    return Stream.of(versionMajor);

                })
                .collect(Collectors.toSet()));
    }