[MIME4J-270] MultipartBuilder creates message with null subtype

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.8.1
• Fix Version/s: 0.8.3
• Component/s: dom
• Assignee: Unassigned
• Reporter: Dmitry Katsubo
• Created: 23/Mar/18 08:36
• Updated: 16/Apr/21 03:11
• Resolved: 16/Apr/21 03:11

Description

JavaDoc of MultipartBuilder#getSubType() reads:

Gets the multipart sub-type. E.g. alternative (the default) or parallel. See RFC 2045 for common sub-types and their meaning.

however builder creates multipart with null subtype:

Multipart multipart = MultipartBuilder.create().build();
new DefaultMessageWriter().writeMessage(multipart, System.out);

outputs:

MIME-Version: 1.0
Content-Type: multipart/null; boundary="-=Part.0.c3f59e98561a68df.16251ed82a4.feee6e1cf64afde8=-"

Expected that builder is initialized with some default subtype.
More over subtypes are listed in RFC 2046 (not in 2045):

• Alternative Subtype
• Parallel Subtype

Issue Links

• links to: GitHub Pull Request #18