Java stream github api example

stream.java

    private static String author(RepositoryCommit commit) {
        User author = commit.getAuthor();
        return (author == null) ? commit.getCommit().getAuthor().getName() : author.getLogin();
    }

    private static String mostCommits(CommitService commitSvc, Repository repo) {
        System.out.println(repo.getName());
        try {
            List<RepositoryCommit> commits = commitSvc.getCommits(repo);
            Map<String, List<RepositoryCommit>> commitsByAuthor = commits.stream().collect(Collectors.groupingBy(Main::author));

            Comparator<Map.Entry<String,List<RepositoryCommit>>> comparator = new Comparator<Map.Entry<String,List<RepositoryCommit>>>() {
                @Override
                public int compare(Map.Entry<String,List<RepositoryCommit>> e1, Map.Entry<String,List<RepositoryCommit>> e2) {
                    return e2.getValue().size() - e1.getValue().size();
                }
            };
            Optional<Map.Entry<String,List<RepositoryCommit>>> max = commitsByAuthor.entrySet().stream().sorted(comparator).findFirst();
            if(max.isPresent()) {
                return max.get().getKey();
            } else {
                return null;
            }

        } catch(Exception e) {
            System.out.println("\tcontinuing but saw... " + e.getMessage());
            return null;
        }
    }

    public static Map<String, String> mostCommitsPerRepo2(GitHubClient client, String org) throws Exception {
        RepositoryService repoSvc = new RepositoryService(client);
        CommitService commitSvc = new CommitService(client);

        List<Repository> repos = repoSvc.getRepositories(org);
        List<String> repoNames = repos.stream().map(Repository::getName).collect(Collectors.toList());
        List<String> users = repos.stream().map((repo) -> mostCommits(commitSvc, repo)).collect(Collectors.toList());

        ;; need zip!
        Iterator<String> userIter = users.iterator();
        Map<String, String> commitsPerRepo = new HashMap<>();
        for(String repoName : repoNames) {
            commitsPerRepo.put(repoName, userIter.next());
        }
        return commitsPerRepo;
    }