Method fetch

app/src/main/java/com/sun/mail/imap/IMAPFolder.java:1189–1348

Prefetch attributes, based on the given FetchProfile.

(Message[] msgs, FetchProfile fp)

     * Prefetch attributes, based on the given FetchProfile.
     */
    @Override
    public synchronized void fetch(Message[] msgs, FetchProfile fp)
			throws MessagingException {
	// cache this information in case connection is closed and
	// protocol is set to null
	boolean isRev1;
	FetchItem[] fitems;
        synchronized (messageCacheLock) {
	    checkOpened();
	    isRev1 = protocol.isREV1();
	    fitems = protocol.getFetchItems();
	}

	StringBuilder command = new StringBuilder();
	boolean first = true;
	boolean allHeaders = false;

	if (fp.contains(FetchProfile.Item.ENVELOPE)) {
	    command.append(getEnvelopeCommand());
	    first = false;
	}
	if (fp.contains(FetchProfile.Item.FLAGS)) {
	    command.append(first ? "FLAGS" : " FLAGS");
	    first = false;
	}
	if (fp.contains(FetchProfile.Item.CONTENT_INFO)) {
	    command.append(first ? "BODYSTRUCTURE" : " BODYSTRUCTURE");
	    first = false;
	}
	if (fp.contains(UIDFolder.FetchProfileItem.UID)) {
	    command.append(first ? "UID" : " UID");
	    first = false;
	}
	if (fp.contains(IMAPFolder.FetchProfileItem.HEADERS)) {
	    allHeaders = true;
	    if (isRev1)
		command.append(first ?
			    "BODY.PEEK[HEADER]" : " BODY.PEEK[HEADER]");
	    else
		command.append(first ? "RFC822.HEADER" : " RFC822.HEADER");
	    first = false;
	}
	if (fp.contains(IMAPFolder.FetchProfileItem.MESSAGE)) {
	    allHeaders = true;
	    if (isRev1)
		command.append(first ? "BODY.PEEK[]" : " BODY.PEEK[]");
	    else
		command.append(first ? "RFC822" : " RFC822");
	    first = false;
	}
	if (fp.contains(FetchProfile.Item.SIZE) ||
		fp.contains(IMAPFolder.FetchProfileItem.SIZE)) {
	    command.append(first ? "RFC822.SIZE" : " RFC822.SIZE");
	    first = false;
	}
	if (fp.contains(IMAPFolder.FetchProfileItem.INTERNALDATE)) {
	    command.append(first ? "INTERNALDATE" : " INTERNALDATE");
	    first = false;