Java Utililty Methods ByteBuffer from Byte Array

ByteBuffer asByteBuffer(byte... arguments)
as Byte Buffer

return ByteBuffer.wrap(arguments);

byte[] buffer2Bytes(ByteBuffer bbuf)
buffer Bytes

byte[] b = new byte[bbuf.remaining()];
int pos = bbuf.position();
bbuf.get(b);
bbuf.position(pos); 
return b;

byte[] bufToArray(ByteBuffer b)
buf To Array

if (b == null) {
 return null;
} else if (b.hasArray()) {
 if (b.position() == 0 && b.arrayOffset() == 0 && b.limit() == b.capacity()) {
 return b.array();
 } else {
 return Arrays.copyOfRange(b.array(), b.arrayOffset(), b.arrayOffset() + b.remaining());
} else {
 byte[] a = new byte[b.remaining()];
 if (b.remaining() > 0) {
 int bp = b.position();
 b.get(a);
 b.position(bp);
 return a;

byte[] bufToArray(ByteBuffer b)
Converts ByteBuffer to an array - if the buffer is backed by the array but doesn't fully overlap it it performs an array copy.

if (b.hasArray()) {
 if (b.position() == 0 && b.arrayOffset() == 0 && b.limit() == b.capacity()) {
 return b.array();
 } else {
 return Arrays.copyOfRange(b.array(), b.arrayOffset(), b.arrayOffset() + b.remaining());
} else {
 byte[] a = new byte[b.remaining()];
...

ByteBuffer byteBuffer(byte[] a)
Converts an byte array into a direct ByteBuffer.

ByteBuffer buf = directByteBuffer(a.length);
buf.put(a);
buf.rewind();
return buf;

byte[] readByteArray(ByteBuffer byteBuffer, int length)
read Byte Array

byte[] ret = new byte[length];
byteBuffer.get(ret, 0, length);
return ret;

byte[] readByteArray(ByteBuffer in)
read Byte Array

int len = readVInt(in);
if (len < 0)
 return null;
byte[] array = new byte[len];
in.get(array);
return array;

byte[] readByteArray(ByteBuffer logBuf)
Read a byte array from the log.

int size = readInt(logBuf); 
if (DEBUG) {
 System.out.println("pos = " + logBuf.position() + " byteArray is " + size + " on read");
if (size == 0) {
 return ZERO_LENGTH_BYTE_ARRAY;
byte[] b = new byte[size];
...

int readByteAsInt(ByteBuffer buffer)
read Byte As Int

return Byte.toUnsignedInt(buffer.get());

ByteBuffer readBytes(ByteBuffer bb, int length)
Read length bytes from bb into a new ByteBuffer.

ByteBuffer copy = bb.duplicate();
copy.limit(copy.position() + length);
bb.position(bb.position() + length);
return copy;