* @param dataBuffer the buffer that contains request.
* @throws IOException if operation fails
*/
private void handleReadClassRequest(final SelectionKey selectionKey, final ByteBuffer dataBuffer) throws IOException {
// Build object (from input)
ClassRequest classRequest = new ClassRequest(dataBuffer);
String className = classRequest.getClassName();
// Answer to the client (go in write mode)
selectionKey.interestOps(SelectionKey.OP_WRITE);
String encodedClassName = className.replaceAll("\\.", "/").concat(".class");