import java.util.ArrayList;

/**
 * Line storage based on an ArrayList
 * 
 * @author Alexander Schaap
 * 
 * @param <T>
 *          Type of lines stored
 */
public class StorageObservableArrayList<T> extends
    StorageObservable<T> {
  protected ArrayList<T> core = new ArrayList<T>();

  @Override
  protected void addInternally(T line) {
    core.add(line);
  }

  @Override
  public T get(int index) {
    return core.get(index);
  }

  @Override
  public void set(int index, T line) {
    core.set(index, line);
  }

  @Override
  public int length() {
    return core.size();
  }

  @Override
  protected void resetInternally() {
    core = new ArrayList<T>();
  }

  @Override
  protected void implementationBasedNotify() {
    notifyObservers(core.get(core.size() -1));
  }
}