Wrapping a ByteBuffer with an InputStream

Question

I have a method that takes an InputStream and reads data from it. I would like to use this method with a ByteBuffer also. Is there a way to wrap a ByteBuffer so it can be ac

Answer 1

Use the heap buffer (byte array) directly if available, otherwise use wrapped bytebuffer (see answer Mike Houston)

public static InputStream asInputStream(ByteBuffer buffer) {
    if (buffer.hasArray()) {
        // use heap buffer; no array is created; only the reference is used
        return new ByteArrayInputStream(buffer.array());
    }
    return new ByteBufferInputStream(buffer);
}

Also note that the wrapped buffer can efficiently support the mark/reset and skip operations.