/**
 * Simple implementation of circular shifting using two for loops.
 * 
 * @author Alexander Schaap
 * 
 */
public class CircularShifter extends CircularShifterAbstract {
  /**
   * Simple implementation of circular shifting using two for loops over 2D
   * array setting one cell at the time. The first line could just have been
   * copied.
   */
  @Override
  public StorageInterface<StorageInterface<WordInterface<?>>> circularShifts(
      StorageInterface<WordInterface<?>> line) {
    StorageInterface<StorageInterface<WordInterface<?>>> result = new StorageObservableArrayList<StorageInterface<WordInterface<?>>>();
    for (int i = 0; i < line.length(); i++) {
      result.add(new StorageObservableArrayList<WordInterface<?>>());
      for (int j = 0; j < line.length(); j++) {
        result.get(i).add(line.get((j + i) % line.length()));
      }
    }
    return result;
  }
}