private String calcChecksum()

in core-it-support/core-it-plugins/maven-it-plugin-dependency-resolution/src/main/java/org/apache/maven/plugin/coreit/AbstractDependencyMojo.java [221:248]

• 19 lines of code
• 4 McCabe index (conditional complexity)

    private String calcChecksum(File jarFile) throws IOException, NoSuchAlgorithmException {
        MessageDigest digester = MessageDigest.getInstance("SHA-1");

        try (FileInputStream is = new FileInputStream(jarFile)) {
            DigestInputStream dis = new DigestInputStream(is, digester);

            for (byte[] buffer = new byte[1024 * 4]; dis.read(buffer) >= 0; ) {
                // just read it
            }
        }

        byte[] digest = digester.digest();

        StringBuilder hash = new StringBuilder(digest.length * 2);

        for (byte aDigest : digest) {
            @SuppressWarnings("checkstyle:magicnumber")
            int b = aDigest & 0xFF;

            if (b < 0x10) {
                hash.append('0');
            }

            hash.append(Integer.toHexString(b));
        }

        return hash.toString();
    }