@Override
public OutputStream getOutputStream() {
if (file.getStreamVariable() == null) {
return null;
}
return file.getStreamVariable().getOutputStream();
}
@Override
public void streamingStarted(StreamingStartEvent event) {
listenProgressOfUploadedFile = file.getStreamVariable() != null;
if (listenProgressOfUploadedFile) {
file.getStreamVariable().streamingStarted(new ReceivingEventWrapper(event));
}
// no need tell to the client about this receiver on next paint
receivers.remove(id);
sentIds.remove(id);
// let the terminal GC the streamvariable and not to accept other
// file uploads to this variable
event.disposeStreamVariable();
}
@Override
public void paintContent(PaintTarget target) throws PaintException {
target.addAttribute(DragAndDropWrapperConstants.DRAG_START_MODE, dragStartMode.ordinal());
if (getDropHandler() != null) {
getDropHandler().getAcceptCriterion().paint(target);
}
if (receivers != null && receivers.size() > 0) {
for (Iterator<Entry<String, ProxyReceiver>> it = receivers.entrySet().iterator();
it.hasNext(); ) {
Entry<String, ProxyReceiver> entry = it.next();
String id = entry.getKey();
ProxyReceiver proxyReceiver = entry.getValue();
Html5File html5File = proxyReceiver.file;
if (html5File.getStreamVariable() != null) {
if (!sentIds.contains(id)) {
target.addVariable(this, "rec-" + id, new ProxyReceiver(id, html5File));
/*
* if a new batch is requested to be uploaded before the
* last one is done, any remaining ids will be replayed.
* We want to avoid a new ProxyReceiver to be made since
* it'll get a new URL, so we need to keep extra track
* on what has been sent.
*
* See #12330.
*/
sentIds.add(id);
// these are cleaned from receivers once the upload has
// started
}
} else {
// instructs the client side not to send the file
target.addVariable(this, "rec-" + id, (String) null);
// forget the file from subsequent paints
it.remove();
}
}
}
target.addAttribute(DragAndDropWrapperConstants.HTML5_DATA_FLAVORS, html5DataFlavors);
}
@Override
public boolean isInterrupted() {
return file.getStreamVariable().isInterrupted();
}
@Override
public void streamingFailed(final StreamingErrorEvent event) {
if (listenProgressOfUploadedFile) {
file.getStreamVariable().streamingFailed(new ReceivingEventWrapper(event));
}
}
@Override
public void streamingFinished(StreamingEndEvent event) {
if (listenProgressOfUploadedFile) {
file.getStreamVariable().streamingFinished(new ReceivingEventWrapper(event));
}
}
@Override
public void onProgress(StreamingProgressEvent event) {
file.getStreamVariable().onProgress(new ReceivingEventWrapper(event));
}
@Override
public boolean listenProgress() {
return file.getStreamVariable().listenProgress();
}