/**
* Sends the given file through this chat transport file transfer operation set.
*
* @param file the file to send
* @return the <tt>FileTransfer</tt> object charged to transfer the file
* @throws Exception if anything goes wrong
*/
public FileTransfer sendFile(File file) throws Exception {
// If this chat transport does not support instant messaging we do
// nothing here.
if (!allowsFileTransfer()) return null;
OperationSetFileTransfer ftOpSet =
contact.getProtocolProvider().getOperationSet(OperationSetFileTransfer.class);
if (FileUtils.isImage(file.getName())) {
// Create a thumbnailed file if possible.
OperationSetThumbnailedFileFactory tfOpSet =
contact.getProtocolProvider().getOperationSet(OperationSetThumbnailedFileFactory.class);
if (tfOpSet != null) {
byte[] thumbnail = getFileThumbnail(file);
if (thumbnail != null && thumbnail.length > 0) {
file =
tfOpSet.createFileWithThumbnail(
file, THUMBNAIL_WIDTH, THUMBNAIL_HEIGHT, "image/png", thumbnail);
}
}
}
return ftOpSet.sendFile(contact, file);
}
/**
* Sets the icon for the given file.
*
* @param file the file to set an icon for
* @return the byte array containing the thumbnail
*/
private byte[] getFileThumbnail(File file) {
byte[] bytes = null;
if (FileUtils.isImage(file.getName())) {
try {
ImageIcon image = new ImageIcon(file.toURI().toURL());
int width = image.getIconWidth();
int height = image.getIconHeight();
if (width > THUMBNAIL_WIDTH) width = THUMBNAIL_WIDTH;
if (height > THUMBNAIL_HEIGHT) height = THUMBNAIL_HEIGHT;
bytes = ImageUtils.getScaledInstanceInBytes(image.getImage(), width, height);
} catch (MalformedURLException e) {
if (logger.isDebugEnabled()) logger.debug("Could not locate image.", e);
}
}
return bytes;
}