private void processRead()

in core/src/main/java/org/apache/mina/transport/nio/NioTcpSession.java [284:330]
27 lines of code
6 McCabe index (conditional complexity)

    private void processRead(final ByteBuffer readBuffer) {
        try {
            LOG.debug("readable session : {}", this);

            // Read everything we can up to the buffer size
            final int readCount = ((SocketChannel) channel).read(readBuffer);

            LOG.debug("read {} bytes", readCount);

            if (readCount < 0) {
                // session closed by the remote peer
                LOG.debug("session closed by the remote peer");
                close(true);
            } else if (readCount > 0) {
                // we have read some data
                // limit at the current position & rewind buffer back to start &
                // push to the chain
                readBuffer.flip();

                if (isSecured()) {
                    // We are reading data over a SSL/TLS encrypted connection.
                    // Redirect the processing to the SslHelper class.
                    final SslHelper sslHelper = getAttribute(SSL_HELPER, null);

                    if (sslHelper == null) {
                        throw new IllegalStateException();
                    }

                    sslHelper.processRead(this, readBuffer);

                    // We don't clear the buffer. It has been done by the sslHelper
                } else {
                    // Plain message, not encrypted : go directly to the chain
                    processMessageReceived(readBuffer);

                    // And now, clear the buffer
                    readBuffer.clear();
                }

                // Update the session idle status
                idleChecker.sessionRead(this, System.currentTimeMillis());
            }
        } catch (final IOException e) {
            LOG.error("Exception while reading : ", e);
            processException(e);
        }
    }