Growing ByteBuffer

Question

Has anyone has ever seen an implementation of java.nio.ByteBuffer that will grow dynamically if a putX() call overruns the capacity?

The reason I want to do it this way

Answer 1

A ByteBuffer cannot really work this way, as its design concept is to be just a view of a specific array, which you may also have a direct reference to. It could not try to swap that array for a larger array without weirdness happening.

What you want to use is a DataOutput. The most convenient way is to use the (pre-release) Guava library:

ByteArrayDataOutput out = ByteStreams.newDataOutput();
out.write(someBytes);
out.writeInt(someInt);
// ...
return out.toByteArray();

But you could also create a DataOutputStream from a ByteArrayOutputStream manually, and just deal with the spurious IOExceptions by chaining them into AssertionErrors.