protected void updateRecord(T record, PersistenceWindow window) {
int id = record.getId();
Buffer buffer = window.getOffsettedBuffer(id);
if (record.inUse()) {
buffer.put(Record.IN_USE.byteValue());
writeRecord(record, buffer);
} else {
buffer.put(Record.NOT_IN_USE.byteValue());
if (!isInRecoveryMode()) {
freeId(id);
}
}
}
protected T getRecord(int id, PersistenceWindow window, boolean force) {
Buffer buffer = window.getOffsettedBuffer(id);
byte inUseByte = buffer.get();
boolean inUse = (inUseByte == Record.IN_USE.byteValue());
if (!inUse && !force) {
throw new InvalidRecordException("Record[" + id + "] not in use");
}
if (inUseByte != Record.IN_USE.byteValue() && inUseByte != Record.NOT_IN_USE.byteValue()) {
throw new InvalidRecordException("Record[" + id + "] unknown in use flag[" + inUse + "]");
}
T record = newRecord(id);
record.setInUse(inUse);
readRecord(record, buffer);
return record;
}