/**
* 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);
}
/**
* Returns the maximum file length supported by the protocol in bytes.
*
* @return the file length that is supported.
*/
public long getMaximumFileLength() {
OperationSetFileTransfer ftOpSet =
contact.getProtocolProvider().getOperationSet(OperationSetFileTransfer.class);
return ftOpSet.getMaximumFileLength();
}