// This is called if the upload is finished.
public void uploadSucceeded(final Upload.SucceededEvent event) {
// Log the upload on screen.
root.addComponent(
new Label(
"File " + event.getFilename() + " of type '" + event.getMIMEType() + "' uploaded."));
// Display the uploaded file in the image panel
final StreamSource streamSource = new IconStreamSource(outputStream);
final StreamResource imageResource =
new StreamResource(streamSource, event.getFilename(), getApplication());
imagePanel.removeAllComponents();
imagePanel.addComponent(new Embedded("", imageResource));
final Set graphVisualization = findGraphVisualization();
// final Set representationOfSemanticIdentity =
// findRepresentationOfSemanticIdentity(visualizedGraph);
final String iconContent = new String(outputStream.toByteArray());
findIcon(graphVisualization).identity().setPayload(iconContent);
/*
final FileResource imageResource =
new FileResource(file, getApplication());
imagePanel.removeAllComponents();
imagePanel.addComponent(new Embedded("", imageResource));
*/
}
