ByteBuffer.array() cannot always be used

[pjfanning]

It is recommended to call ByteBuffer.hasArray before calling ByteBuffer.array()

avro4s calls array() in quite a few places.

https://github.com/search?q=repo%3Asksamuel%2Favro4s%20array()&type=code

See javadoc:
https://docs.oracle.com/javase/8/docs/api/java/nio/ByteBuffer.html#array--

Calling array() on a ByteBuffer that hasArray=false (eg a read-only byte buffer) will lead to an exception.

In the cases where hasArray=false, a decision needs to be made over whether you can iterate over the bytes of the Buffer using other ByteBuffer methods or whether you could do something like wrap the ByteBuffer in an enclosing class - eg something like ByteBufferBackedInputStream

[sksamuel]

Makes sense. If you want to raise a PR I would cut a release.