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/**
* $RCSfile$
* $Revision$
* $Date$
*
* Copyright 2003-2006 Jive Software.
*
* All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jivesoftware.smackx.filetransfer;
import org.jivesoftware.smack.PacketListener;
import org.jivesoftware.smack.Connection;
import org.jivesoftware.smack.filter.AndFilter;
import org.jivesoftware.smack.filter.IQTypeFilter;
import org.jivesoftware.smack.filter.PacketTypeFilter;
import org.jivesoftware.smack.packet.IQ;
import org.jivesoftware.smack.packet.Packet;
import org.jivesoftware.smack.packet.XMPPError;
import org.jivesoftware.smack.util.StringUtils;
import org.jivesoftware.smackx.packet.StreamInitiation;
import java.util.ArrayList;
import java.util.List;
/**
* The file transfer manager class handles the sending and recieving of files.
* To send a file invoke the {@link #createOutgoingFileTransfer(String)} method.
* <p>
* And to recieve a file add a file transfer listener to the manager. The
* listener will notify you when there is a new file transfer request. To create
* the {@link IncomingFileTransfer} object accept the transfer, or, if the
* transfer is not desirable reject it.
*
* @author Alexander Wenckus
*
*/
public class FileTransferManager {
private final FileTransferNegotiator fileTransferNegotiator;
private List<FileTransferListener> listeners;
private Connection connection;
/**
* Creates a file transfer manager to initiate and receive file transfers.
*
* @param connection
* The Connection that the file transfers will use.
*/
public FileTransferManager(Connection connection) {
this.connection = connection;
this.fileTransferNegotiator = FileTransferNegotiator
.getInstanceFor(connection);
}
/**
* Add a file transfer listener to listen to incoming file transfer
* requests.
*
* @param li
* The listener
* @see #removeFileTransferListener(FileTransferListener)
* @see FileTransferListener
*/
public void addFileTransferListener(final FileTransferListener li) {
if (listeners == null) {
initListeners();
}
synchronized (this.listeners) {
listeners.add(li);
}
}
private void initListeners() {
listeners = new ArrayList<FileTransferListener>();
connection.addPacketListener(new PacketListener() {
public void processPacket(Packet packet) {
fireNewRequest((StreamInitiation) packet);
}
}, new AndFilter(new PacketTypeFilter(StreamInitiation.class),
new IQTypeFilter(IQ.Type.SET)));
}
protected void fireNewRequest(StreamInitiation initiation) {
FileTransferListener[] listeners = null;
synchronized (this.listeners) {
listeners = new FileTransferListener[this.listeners.size()];
this.listeners.toArray(listeners);
}
FileTransferRequest request = new FileTransferRequest(this, initiation);
for (int i = 0; i < listeners.length; i++) {
listeners[i].fileTransferRequest(request);
}
}
/**
* Removes a file transfer listener.
*
* @param li
* The file transfer listener to be removed
* @see FileTransferListener
*/
public void removeFileTransferListener(final FileTransferListener li) {
if (listeners == null) {
return;
}
synchronized (this.listeners) {
listeners.remove(li);
}
}
/**
* Creates an OutgoingFileTransfer to send a file to another user.
*
* @param userID
* The fully qualified jabber ID (i.e. full JID) with resource of the user to
* send the file to.
* @return The send file object on which the negotiated transfer can be run.
* @exception IllegalArgumentException if userID is null or not a full JID
*/
public OutgoingFileTransfer createOutgoingFileTransfer(String userID) {
if (userID == null) {
throw new IllegalArgumentException("userID was null");
}
// We need to create outgoing file transfers with a full JID since this method will later
// use XEP-0095 to negotiate the stream. This is done with IQ stanzas that need to be addressed to a full JID
// in order to reach an client entity.
else if (!StringUtils.isFullJID(userID)) {
throw new IllegalArgumentException("The provided user id was not a full JID (i.e. with resource part)");
}
return new OutgoingFileTransfer(connection.getUser(), userID,
fileTransferNegotiator.getNextStreamID(),
fileTransferNegotiator);
}
/**
* When the file transfer request is acceptable, this method should be
* invoked. It will create an IncomingFileTransfer which allows the
* transmission of the file to procede.
*
* @param request
* The remote request that is being accepted.
* @return The IncomingFileTransfer which manages the download of the file
* from the transfer initiator.
*/
protected IncomingFileTransfer createIncomingFileTransfer(
FileTransferRequest request) {
if (request == null) {
throw new NullPointerException("RecieveRequest cannot be null");
}
IncomingFileTransfer transfer = new IncomingFileTransfer(request,
fileTransferNegotiator);
transfer.setFileInfo(request.getFileName(), request.getFileSize());
return transfer;
}
protected void rejectIncomingFileTransfer(FileTransferRequest request) {
StreamInitiation initiation = request.getStreamInitiation();
IQ rejection = FileTransferNegotiator.createIQ(
initiation.getPacketID(), initiation.getFrom(), initiation
.getTo(), IQ.Type.ERROR);
rejection.setError(new XMPPError(XMPPError.Condition.no_acceptable));
connection.sendPacket(rejection);
}
}
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