import java.util.Observable;

public abstract class OutputAbstract implements OutputInterface {
  protected StorageInterface<StorageInterface<StorageInterface<WordInterface<?>>>> sls;
  protected String result = "";

  @Override
  public void connect(
      StorageInterface<StorageInterface<StorageInterface<WordInterface<?>>>> sls) {
    if (sls instanceof StoragePassthrough)
      sls.connect(this);
    else
      this.sls = sls;
  }
  @SuppressWarnings("unchecked")
  @Override
  public void update(Observable o, Object line) {
    StorageObservable<StorageInterface<StorageInterface<WordInterface<?>>>> sls = new StorageObservableLinkedList<StorageInterface<StorageInterface<WordInterface<?>>>>();
    sls.add((StorageInterface<StorageInterface<WordInterface<?>>>) line);
    connect(sls);
    print();
    this.sls = new StorageObservableLinkedList<StorageInterface<StorageInterface<WordInterface<?>>>>(); //set to empty so that a final call to print will not output the last line again
  }
  @Override
  public String getResult() {
    return result;
  }
  @Override
  public void reset() {
    result = "";
  }
}