benjishults

public class Application {
  public static void main(String[] args) {
    Path file = Path.of(args[0]);
    DocumentType.forPath(file).processFile(file);
  }
}

benjishults

public interface Processor {
  void processFile(Path file);
}

benjishults

public class Processor {
  public void processFile(Path file) {
    switch (DocumentType.forPath(file)) {
    case TXT:
      processTextFile(file);
      break;
    case MD:
      processMarkdownFile(file);
      break;
    case HTML:

benjishults

public enum DocumentType {
  TXT("txt", "text"),
  MD("md", "markdown"),
  HTML("html", "htm");

  String[] extensions;

  DocumentType(String... extensions) {
    this.extensions = Arrays.copyOf(extensions, extensions.length);
  }

benjishults

public class Application {
  public static void main(String[] args) {
    new Processor().processFile(Path.of(args[0]));
  }
}

benjishults

public class Processor {
  public void processFile(Path file) {
    switch (FileNameHelper.getLowercaseExtension(file)) {
    case DocumentType.TXT:
    case DocumentType.TEXT:
     processTextFile(file);
     break;
    case DocumentType.MD:
    case DocumentType.MARKDOWN:
      processMarkdownFile(file);

benjishults

public class CommentController {
  // ... fields and constructor omitted ...
  public Comment postComment(PostCommentPayload payload) {
    // .. validation omitted ...
    CommentUserGroup cug = cugDao.find(payload.getCommentUserGroupId());
    ExternalGroupHelper groupHelper = extGroupHelperProvider.getHelperForType(cug.getExtGroupType());
    if (groupHelper.isMember(securityContextHelper.getCurrentUser(), cug.getExtGroupId())) {
      Comment persistedComment = commentDao.persist(payload.toComment());
      fireCommentAddedEvent(persistedComment);
      return persistedComment;

benjishults

public class CommentController {
  private static final Logger LOG = LoggerFactory.getLogger(CommentController.class);

  // implementation of listeners might need to be thread safe
  // depending on whether you allow dynamic change to
  // listener registration
  private Set<CommentAddedListener> listeners;

  // ... some fields and constructor omitted ...

benjishults

public interface CommentAddedListener {
  void processComment(Comment comment);
}

benjishults

public class Comment {
  private String commentUserGroupId;
  private User author;
  private Object payload;
  // ... constructor, getters, equals, hashCode ...
}