public static void writeIssue(Issue issue, final JSONWriter writer) throws JSONException {
    JsonOutput.addIfNotNull(writer, "id", issue.getId());
    JsonOutput.addIfNotNull(writer, "subject", issue.getSubject());
    JsonOutput.addIfNotNull(writer, "parent_issue_id", issue.getParentId());
    JsonOutput.addIfNotNull(writer, "estimated_hours", issue.getEstimatedHours());
    JsonOutput.addIfNotNull(writer, "spent_hours", issue.getSpentHours());
    if (issue.getAssignee() != null)
      JsonOutput.addIfNotNull(writer, "assigned_to_id", issue.getAssignee().getId());
    JsonOutput.addIfNotNull(writer, "priority_id", issue.getPriorityId());
    JsonOutput.addIfNotNull(writer, "done_ratio", issue.getDoneRatio());
    if (issue.getProject() != null)
      JsonOutput.addIfNotNull(writer, "project_id", issue.getProject().getIdentifier());
    if (issue.getAuthor() != null)
      JsonOutput.addIfNotNull(writer, "author_id", issue.getAuthor().getId());
    addShort2(writer, "start_date", issue.getStartDate());
    addIfNotNullShort2(writer, "due_date", issue.getDueDate());
    if (issue.getTracker() != null)
      JsonOutput.addIfNotNull(writer, "tracker_id", issue.getTracker().getId());
    JsonOutput.addIfNotNull(writer, "description", issue.getDescription());

    addIfNotNullFull(writer, "created_on", issue.getCreatedOn());
    addIfNotNullFull(writer, "updated_on", issue.getUpdatedOn());
    JsonOutput.addIfNotNull(writer, "status_id", issue.getStatusId());
    if (issue.getTargetVersion() != null)
      JsonOutput.addIfNotNull(writer, "fixed_version_id", issue.getTargetVersion().getId());
    if (issue.getCategory() != null)
      JsonOutput.addIfNotNull(writer, "category_id", issue.getCategory().getId());
    JsonOutput.addIfNotNull(writer, "notes", issue.getNotes());
    writeCustomFields(writer, issue.getCustomFields());

    if (issue.getAttachments() != null && issue.getAttachments().size() > 0) {
      final List<Attachment> uploads = new ArrayList<Attachment>();
      for (Attachment attach : issue.getAttachments())
        if (attach.getToken() != null) uploads.add(attach);
      JsonOutput.addArrayIfNotEmpty(writer, "uploads", uploads, UPLOAD_WRITER);
    }

    /*
     * Journals and Relations cannot be set for an issue during creation or
     * updates.
     */
  }
 @SuppressWarnings("unused")
 private static void tryUpload(
     RedmineManager mgr, IssueManager issueManager, AttachmentManager attachmentManager)
     throws RedmineException, IOException {
   final byte[] content = new byte[] {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
   final Attachment attach1 =
       attachmentManager.uploadAttachment("test.bin", "application/ternary", content);
   final Issue testIssue = new Issue();
   testIssue.setSubject("This is upload ticket!");
   testIssue.addAttachment(attach1);
   final Project tmpProject = ProjectFactory.create("Upload project", "uploadtmpproject");
   final Project project = mgr.getProjectManager().createProject(tmpProject);
   try {
     final Issue createdIssue = issueManager.createIssue(project.getIdentifier(), testIssue);
     try {
       System.out.println(createdIssue.getAttachments());
     } finally {
       issueManager.deleteIssue(createdIssue.getId());
     }
   } finally {
     mgr.getProjectManager().deleteProject(project.getIdentifier());
   }
 }