@Override
  public boolean equals(Object obj) {
    if (this == obj) {
      return true;
    }

    if (!(obj instanceof ShoppingCategory)) {
      return false;
    }

    ShoppingCategory shoppingCategory = (ShoppingCategory) obj;

    long primaryKey = shoppingCategory.getPrimaryKey();

    if (getPrimaryKey() == primaryKey) {
      return true;
    } else {
      return false;
    }
  }
  public boolean equals(Object obj) {
    if (obj == null) {
      return false;
    }

    ShoppingCategory shoppingCategory = null;

    try {
      shoppingCategory = (ShoppingCategory) obj;
    } catch (ClassCastException cce) {
      return false;
    }

    long pk = shoppingCategory.getPrimaryKey();

    if (getPrimaryKey() == pk) {
      return true;
    } else {
      return false;
    }
  }