private boolean hasUIDL() throws IOException {
if (connection.hasCapability(Pop3Capabilities.UIDL)) {
return true;
}
// Additional check for servers that don't support CAPA
// (i.e. Hotmail) but do support UIDL.
try {
if (connection.getMessageCount() > 0) {
// Only need to test UIDL on first message
connection.getMessageUid(1);
} else {
connection.getMessageUids();
}
} catch (CommandFailedException e) {
return false;
}
return true;
}
@Override
public synchronized void importData(List<Integer> folderIds, boolean fullSync)
throws ServiceException {
validateDataSource();
connect();
try {
if (connection.getMessageCount() > 0) {
if (dataSource.leaveOnServer()) {
fetchAndRetainMessages();
} else {
fetchAndDeleteMessages();
}
}
connection.quit();
} catch (ServiceException e) {
throw e;
} catch (Exception e) {
throw ServiceException.FAILURE("Synchronization of POP3 folder failed", e);
} finally {
connection.close();
}
}