public ByteArrayBuffer readBufferBySlot(Slot slot) {
if (Slot.isNull(slot)) {
return null;
}
if (DTrace.enabled) {
DTrace.READ_SLOT.logLength(slot.address(), slot.length());
}
ByteArrayBuffer buffer = new ByteArrayBuffer(slot.length());
buffer.readEncrypt(this, slot.address());
return buffer;
}
public StatefulBuffer readStatefulBufferBySlot(Transaction trans, int id, Slot slot) {
if (Slot.isNull(slot)) {
return null;
}
if (DTrace.enabled) {
DTrace.READ_SLOT.logLength(slot.address(), slot.length());
}
StatefulBuffer buffer = createStatefulBuffer(trans, slot.address(), slot.length());
buffer.setID(id);
buffer.readEncrypt(this, slot.address());
return buffer;
}
public void free(Slot slot) {
if (slot.isNull()) {
return;
// TODO: This should really be an IllegalArgumentException but old database files
// with index-based FreespaceManagers appear to deliver zeroed slots.
// throw new IllegalArgumentException();
}
if (_freespaceManager == null) {
// Can happen on early free before freespacemanager
// is up, during conversion.
return;
}
if (DTrace.enabled) {
DTrace.FILE_FREE.logLength(slot.address(), slot.length());
}
_freespaceManager.free(slot);
}