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39662d3b0f
2) Learned to spell. 3) Changed to enums. git-svn-id: http://svn.igniterealtime.org/svn/repos/smack/trunk@5163 b35dd754-fafc-0310-a699-88a17e54d16e
185 lines
6.5 KiB
Java
185 lines
6.5 KiB
Java
/**
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* $RCSfile$
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* $Revision: $
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* $Date: $
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*
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* Copyright 2003-2006 Jive Software.
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*
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* All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jivesoftware.smackx.filetransfer;
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import org.jivesoftware.smack.XMPPException;
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import java.io.*;
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/**
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* An incoming file transfer is created when the
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* {@link FileTransferManager#createIncomingFileTransfer(FileTransferRequest)}
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* method is invoked. It is a file being sent to the local user from another
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* user on the jabber network. There are two stages of the file transfer to be
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* concerned with and they can be handled in different ways depending upon the
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* method that is invoked on this class.
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* <p/>
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* The first way that a file is recieved is by calling the
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* {@link #recieveFile()} method. This method, negotiates the appropriate stream
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* method and then returns the <b><i>InputStream</b></i> to read the file
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* data from.
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* <p/>
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* The second way that a file can be recieved through this class is by invoking
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* the {@link #recieveFile(File)} method. This method returns immediatly and
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* takes as its parameter a file on the local file system where the file
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* recieved from the transfer will be put.
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*
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* @author Alexander Wenckus
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*/
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public class IncomingFileTransfer extends FileTransfer {
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private FileTransferRequest recieveRequest;
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private InputStream inputStream;
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protected IncomingFileTransfer(FileTransferRequest request,
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FileTransferNegotiator transferNegotiator) {
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super(request.getRequestor(), request.getStreamID(), transferNegotiator);
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this.recieveRequest = request;
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}
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/**
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* Negotiates the stream method to transfer the file over and then returns
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* the negotiated stream.
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*
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* @return The negotiated InputStream from which to read the data.
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* @throws XMPPException If there is an error in the negotiation process an exception
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* is thrown.
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*/
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public InputStream recieveFile() throws XMPPException {
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if (inputStream != null) {
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throw new IllegalStateException("Transfer already negotiated!");
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}
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try {
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inputStream = negotiateStream();
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}
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catch (XMPPException e) {
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setException(e);
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throw e;
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}
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return inputStream;
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}
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/**
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* This method negotitates the stream and then transfer's the file over the
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* negotiated stream. The transfered file will be saved at the provided
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* location.
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* <p/>
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* This method will return immedialtly, file transfer progress can be
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* monitored through several methods:
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* <p/>
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* <UL>
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* <LI>{@link FileTransfer#getStatus()}
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* <LI>{@link FileTransfer#getProgress()}
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* <LI>{@link FileTransfer#isDone()}
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* </UL>
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*
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* @param file The location to save the file.
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* @throws XMPPException
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* @throws IllegalArgumentException This exception is thrown when the the provided file is
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* either null, or cannot be written to.
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*/
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public void recieveFile(final File file) throws XMPPException {
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if (file != null) {
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if (!file.exists()) {
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try {
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file.createNewFile();
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}
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catch (IOException e) {
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throw new XMPPException(
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"Could not create file to write too", e);
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}
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}
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if (!file.canWrite()) {
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throw new IllegalArgumentException("Cannot write to provided file");
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}
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}
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else {
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throw new IllegalArgumentException("File cannot be null");
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}
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Thread transferThread = new Thread(new Runnable() {
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public void run() {
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try {
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inputStream = negotiateStream();
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}
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catch (XMPPException e) {
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handleXMPPException(e);
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return;
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}
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OutputStream outputStream = null;
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try {
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outputStream = new FileOutputStream(file);
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setStatus(Status.in_progress);
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writeToStream(inputStream, outputStream);
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}
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catch (XMPPException e) {
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setStatus(Status.error);
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setError(Error.stream);
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setException(e);
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}
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catch (FileNotFoundException e) {
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setStatus(Status.error);
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setError(Error.bad_file);
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setException(e);
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}
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if (getStatus().equals(Status.in_progress))
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setStatus(Status.complete);
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try {
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if (inputStream != null) {
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inputStream.close();
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}
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if (outputStream != null) {
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outputStream.close();
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}
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}
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catch (IOException e) {
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/** We need to do something here **/
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}
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}
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}, "File Transfer " + streamID);
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transferThread.start();
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}
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private void handleXMPPException(XMPPException e) {
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setStatus(FileTransfer.Status.error);
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setException(e);
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}
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private InputStream negotiateStream() throws XMPPException {
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setStatus(Status.negotiating_transfer);
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StreamNegotiator streamNegotiator = negotiator
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.selectStreamNegotiator(recieveRequest);
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setStatus(Status.negotiating_stream);
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InputStream inputStream = streamNegotiator
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.createIncomingStream(recieveRequest.getStreamInitiation());
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setStatus(Status.negotiated);
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return inputStream;
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}
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public void cancel() {
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setStatus(Status.cancelled);
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}
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}
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