/** Resizes the internal byte buffer with a simple doubling policy, if needed. */
private final void growIfNeeded(int minimumDesired) {
if (buffer.b.remaining() < minimumDesired) {
// Compute the size of the new buffer
int newCapacity = buffer.b.capacity();
int newRemaining = newCapacity - buffer.b.position();
while (newRemaining < minimumDesired) {
newRemaining += newCapacity;
newCapacity *= 2;
}
// Allocate and copy
BBContainer next;
if (isDirect) {
next = DBBPool.allocateDirect(newCapacity);
} else if (m_pool != null) {
next = m_pool.acquire(newCapacity);
} else {
next = DBBPool.wrapBB(ByteBuffer.allocate(newCapacity));
}
buffer.b.flip();
next.b.put(buffer.b);
assert next.b.remaining() == newRemaining;
buffer.discard();
buffer = next;
if (callback != null) callback.onBufferGrow(this);
assert (buffer.b.order() == ByteOrder.BIG_ENDIAN);
}
}
/** constructor that sets callback object. */
public FastSerializer(
boolean bigEndian,
boolean isDirect,
BufferGrowCallback callback,
DBBPool pool,
int initialAllocation) {
assert (initialAllocation > 0);
assert (pool == null && isDirect || pool != null && !isDirect || pool == null && !isDirect);
this.isDirect = isDirect;
if (pool != null) {
m_pool = pool;
buffer = pool.acquire(initialAllocation);
} else if (isDirect) {
assert (pool == null);
m_pool = null;
buffer = DBBPool.allocateDirect(initialAllocation);
} else {
buffer = DBBPool.wrapBB(ByteBuffer.allocate(initialAllocation));
m_pool = null;
assert (pool == null);
}
this.callback = callback;
buffer.b.order(bigEndian ? ByteOrder.BIG_ENDIAN : ByteOrder.LITTLE_ENDIAN);
}