result.put(Sha256ChecksumAlgorithmFactory.NAME, new Sha256ChecksumAlgorithmFactory());
        result.put(Sha1ChecksumAlgorithmFactory.NAME, new Sha1ChecksumAlgorithmFactory());
        result.put(Md5ChecksumAlgorithmFactory.NAME, new Md5ChecksumAlgorithmFactory());
        return result;
    }

            result = "";
        } else {
            String current = ChecksumAlgorithmHelper.calculate(
                            src.getPath(), List.of(new Sha1ChecksumAlgorithmFactory()))
                    .get(Sha1ChecksumAlgorithmFactory.NAME);
            String existing = sourceState.get();
            if (!Files.exists(target) || !Objects.equals(current, existing)) {