private static Map<String, Attachment> saveAttachments(
Collection<MimePart> partsToAttach, Resource container)
throws MessagingException, IOException, NoSuchAlgorithmException {
Map<String, Attachment> result = new HashMap<>();
for (MimePart partToAttach : partsToAttach) {
Attachment attachment = saveAttachment(partToAttach, container);
if (partToAttach.getContentID() != null) {
String cid = partToAttach.getContentID().trim();
cid = cid.replace("<", "");
cid = cid.replace(">", "");
result.put(cid, attachment);
}
}
return result;
}
/**
* Returns true if the given part is root part.
*
* <p>The given part is root part, if the part is the first one and the given root id is not
* defined or the content id of the part equals to the given root id.
*
* @param part
* @param nthPart
* @param rootId
* @return
* @throws MessagingException
*/
private static boolean isRootPart(MimePart part, int nthPart, String rootId)
throws MessagingException {
return (rootId == null && nthPart == 0) || StringUtils.equals(part.getContentID(), rootId);
}