@Override
public boolean next() throws ChangelogException {
final boolean hasNext = currentCursor.next();
if (hasNext) {
return true;
}
final LogFile<K, V> logFile = log.getNextLogFile(currentLogFile);
if (logFile != null) {
switchToLogFile(logFile);
return currentCursor.next();
}
return false;
}
@Override
public boolean positionTo(
final K key,
final KeyMatchingStrategy matchStrategy,
final PositionStrategy positionStrategy)
throws ChangelogException {
final LogFile<K, V> logFile = log.findLogFileFor(key);
if (logFile != currentLogFile) {
switchToLogFile(logFile);
}
return (key == null) ? true : currentCursor.positionTo(key, matchStrategy, positionStrategy);
}
/** Returns the state of this cursor. */
@Override
CursorState<K, V> getState() throws ChangelogException {
return new CursorState<>(
currentLogFile, currentCursor.getFilePosition(), currentCursor.getRecord());
}
@Override
public Record<K, V> getRecord() {
return currentCursor != null ? currentCursor.getRecord() : null;
}