Extend DataInput & DataOutput to avoid copy of byte[] ----------------------------------------------------- Key: JGRP-2503 URL: https://issues.redhat.com/browse/JGRP-2503 Project: JGroups Issue Type: Feature Request Affects Versions: 5.0.4 Reporter: Jingqi Xu Assignee: Bela Ban Priority: Optional Fix For: 5.1 "DataInput's void readFully(byte b[])" will cause an extra copy when reading bytes from DataInput. Sometimes business logic needs to read bytes from DataInput first, then process them conditionally(or will not process at all) , is it possible to support ByteBuffer api like: public interface XDataInput extends DataInput {     ByteBuffer readBuffer(int n); } public interface XDataOutput extends DataOutput {     void writeBuffer(ByteBuffer value); } ByteArrayDataInputStream.java @Override public ByteBuffer readBuffer(int n) {     ByteBuffer r = wrap(this.buf, this.pos, n); this.pos += n; return r; } public interface Streamable {     void writeTo(XDataOutput out) throws IOException;     void readFrom(XDataInput in) throws IOException, ClassNotFoundException; }