class Portfolio extends Asset {
  private ArrayList<Asset> myAssets;
  public static final String INDENT = "    ";

  public Portfolio(String name) {
    super(name);
    myAssets = new ArrayList<Asset>();
  }

  public void add(Asset h) {
    if (h != this)
      myAssets.add(h);
  }

  private void listAll(String leading) {
    System.out.println(leading + toString());
    for (Asset a : myAssets) {
      if (a instanceof Portfolio)
        ((Portfolio) a).listAll(leading + INDENT);
      else
        System.out.println(leading + INDENT + a);
    }
  }

  public void listAll() {
    listAll("");
  }

  @Override
  public double getValue() {
    double sum = 0.0;
    for (Asset a : myAssets)
      sum += a.getValue();
    return sum;
  }
}