Is it possible to use IMAP Query Terms in Javamail with GMail? - gmail

Question

I am trying to programmatically retrieve the Call Log messages that are backup up from my android phone by a little application called SMSBackup (highly recommended).
What I want to do is to be able to retrieve the call logs for a particular day. I have tried the following program, using JavaMail:
public List<CallLogEntry> getCallLog(String username, String password, Date date, TimeZone tz) {
Store store = null;
try {
store = MailUtils.getGmailImapStore(username, password);
Folder folder = store.getDefaultFolder();
if (folder == null)
throw new Exception("No default folder");
Folder inboxfolder = folder.getFolder("Call log");
if (inboxfolder == null)
throw new Exception("No INBOX");
inboxfolder.open(Folder.READ_ONLY);
Date fromMidnight = new Date(TimeUtils.fromMidnight(date.getTime(), tz));
Date toMidnight = new Date(TimeUtils.toMidnight(date.getTime(), 0, tz));
SentDateTerm fromTerm = new SentDateTerm(SentDateTerm.GT, fromMidnight);
SentDateTerm toTerm = new SentDateTerm(SentDateTerm.LT, toMidnight);
AndTerm searchTerms = new AndTerm(fromTerm, toTerm);
Message[] msgs = inboxfolder.search(searchTerms);
FetchProfile fp = new FetchProfile();
fp.add("Subject");
fp.add("Content");
fp.add("From");
fp.add("SentDate");
inboxfolder.fetch(msgs, fp);
List<CallLogEntry> callLog = new ArrayList<CallLogEntry>();
for (Message message : msgs) {
CallLogEntry entry = new CallLogEntry();
entry.subject = message.getSubject();
entry.body = (String) message.getContent();
callLog.add(entry);
}
inboxfolder.close(false);
store.close();
return callLog;
} catch (NoSuchProviderException ex) {
ex.printStackTrace();
} catch (MessagingException ex) {
ex.printStackTrace();
} catch (Exception ex) {
ex.printStackTrace();
} finally {
try {
if (store != null)
store.close();
} catch (MessagingException ex) {
ex.printStackTrace();
}
}
return null;
}
My two utility methods (fromMidnight / toMidnight):
public static final long fromMidnight(long time, TimeZone tz) {
Calendar c = Calendar.getInstance(tz);
c.setTimeInMillis(time);
c.set(Calendar.HOUR_OF_DAY, 0);
c.set(Calendar.MINUTE, 0);
c.set(Calendar.SECOND, 0);
c.set(Calendar.MILLISECOND, 1);
return c.getTimeInMillis();
}
public static final long toMidnight(long time, int nDays, TimeZone tz) {
Calendar c = Calendar.getInstance(tz);
c.setTimeInMillis(time + nDays*MILLIS_IN_DAY);
c.set(Calendar.HOUR_OF_DAY, 23);
c.set(Calendar.MINUTE, 59);
c.set(Calendar.SECOND, 59);
c.set(Calendar.MILLISECOND, 999);
return c.getTimeInMillis();
}
However, for some reason:
while eventually executing, it takes about 3 minutes to complete
I'm getting back the entire Call log, i.e. the entire content of the "Call Log" folder in my mailbox
What am I missing?

Answer 1

The main thing that you're missing is that the underlying IMAP SEARCH syntax supports only dates, not date-times. So your query will result in JavaMail issuing the command:
A001 SEARCH SENTBEFORE 16-JAN-2011 SENTSINCE 16-JAN-2011 ALL
(Put a breakpoint in IMAPProtocol.issueSearch() to see this.)
GMail appears to freak out on this query, which logically cannot match any messages. Try switching your logic to a single term using SentDateTerm.EQ (which maps to SENTON) and it should work:
SentDateTerm term = new SentDateTerm(SentDateTerm.EQ, date.getTime());
Message[] msgs = inboxfolder.search(term);