Empty iterator example

public class MenuItem{

    private string _name;

    public MenuItem(string name){
        _name = name;
    }


    public IEnumerable CreateSingleIterator(){
        return new SingleIterator(this);
    }

}



public class SingleIterator : IEnumerable {

    private MenuItem _menuItem;
    private bool _isCalled;

    public SingleIterator(MenuItem menuItem) {
        _menuItem = menuItem;
        _isCalled = false;
    }

    public bool HasNext(){
        return _isCalled;
    }

    public MenuItem Next(){
        if(_isCalled){
            _isCalled = true;
            return _menuItem;
        }
        else{
            throw new IllegalStateException("Im out of elements");
        }
    }

}