How to use

getNativeBuffer

method

in

org.springframework.core.io.buffer.DefaultDataBuffer

/**
 * Converts a {@link DataBuffer} into an {@link HttpData}.
 */
HttpData toHttpData(DataBuffer dataBuffer) {
  if (dataBuffer instanceof NettyDataBuffer) {
    return new ByteBufHttpData(((NettyDataBuffer) dataBuffer).getNativeBuffer(), false);
  }
  if (dataBuffer instanceof DefaultDataBuffer) {
    return new ByteBufHttpData(
        Unpooled.wrappedBuffer(((DefaultDataBuffer) dataBuffer).getNativeBuffer()), false);
  }
  return new ByteBufHttpData(Unpooled.wrappedBuffer(dataBuffer.asByteBuffer()), false);
}