/**
* Utility method throwing an exception if the stack is not properly initialized.
*
* @throws java.lang.IllegalStateException if the underlying stack is not registered and
* initialized.
*/
private void assertConnected() throws IllegalStateException {
if (jabberProvider == null)
throw new IllegalStateException(
"The provider must be non-null and signed on the "
+ "service before being able to send a file.");
else if (!jabberProvider.isRegistered()) {
// if we are not registered but the current status is online
// change the current status
if (opSetPersPresence.getPresenceStatus().isOnline()) {
opSetPersPresence.fireProviderStatusChangeEvent(
opSetPersPresence.getPresenceStatus(),
jabberProvider.getJabberStatusEnum().getStatus(JabberStatusEnum.OFFLINE));
}
throw new IllegalStateException(
"The provider must be signed on the service before " + "being able to send a file.");
}
}
/**
* Sends a file transfer request to the given <tt>toContact</tt>.
*
* @return the transfer object
* @param toContact the contact that should receive the file
* @param file file to send
* @param gw special gateway to be used for receiver if its jid misses the domain part
*/
FileTransfer sendFile(Contact toContact, File file, String gw)
throws IllegalStateException, IllegalArgumentException, OperationNotSupportedException {
OutgoingFileTransferJabberImpl outgoingTransfer = null;
try {
assertConnected();
if (file.length() > getMaximumFileLength())
throw new IllegalArgumentException("File length exceeds the allowed one for this protocol");
String fullJid = null;
// Find the jid of the contact which support file transfer
// and is with highest priority if more than one found
// if we have equals priorities
// choose the one that is more available
OperationSetMultiUserChat mucOpSet =
jabberProvider.getOperationSet(OperationSetMultiUserChat.class);
if (mucOpSet != null && mucOpSet.isPrivateMessagingContact(toContact.getAddress())) {
fullJid = toContact.getAddress();
} else {
Iterator<Presence> iter =
jabberProvider.getConnection().getRoster().getPresences(toContact.getAddress());
int bestPriority = -1;
PresenceStatus jabberStatus = null;
while (iter.hasNext()) {
Presence presence = iter.next();
if (jabberProvider.isFeatureListSupported(
presence.getFrom(),
new String[] {
"http://jabber.org/protocol/si",
"http://jabber.org/protocol/si/profile/file-transfer"
})) {
int priority =
(presence.getPriority() == Integer.MIN_VALUE) ? 0 : presence.getPriority();
if (priority > bestPriority) {
bestPriority = priority;
fullJid = presence.getFrom();
jabberStatus =
OperationSetPersistentPresenceJabberImpl.jabberStatusToPresenceStatus(
presence, jabberProvider);
} else if (priority == bestPriority && jabberStatus != null) {
PresenceStatus tempStatus =
OperationSetPersistentPresenceJabberImpl.jabberStatusToPresenceStatus(
presence, jabberProvider);
if (tempStatus.compareTo(jabberStatus) > 0) {
fullJid = presence.getFrom();
jabberStatus = tempStatus;
}
}
}
}
}
// First we check if file transfer is at all supported for this
// contact.
if (fullJid == null) {
throw new OperationNotSupportedException(
"Contact client or server does not support file transfers.");
}
if (gw != null && !fullJid.contains("@") && !fullJid.endsWith(gw)) {
fullJid = fullJid + "@" + gw;
}
OutgoingFileTransfer transfer = manager.createOutgoingFileTransfer(fullJid);
outgoingTransfer =
new OutgoingFileTransferJabberImpl(toContact, file, transfer, jabberProvider);
// Notify all interested listeners that a file transfer has been
// created.
FileTransferCreatedEvent event = new FileTransferCreatedEvent(outgoingTransfer, new Date());
fireFileTransferCreated(event);
// Send the file through the Jabber file transfer.
transfer.sendFile(file, "Sending file");
// Start the status and progress thread.
new FileTransferProgressThread(transfer, outgoingTransfer).start();
} catch (XMPPException e) {
logger.error("Failed to send file.", e);
}
return outgoingTransfer;
}