package Classes;

import java.util.*;

public class SetAircraftsGeneric<T>
{
    private final ArrayList<T> _places;

    public int getCount()
    {
        return _places.size();
    }

    private final int _maxCount;

    public SetAircraftsGeneric(int count)
    {
        _maxCount = count;
        _places = new ArrayList<T>();
    }

    public int Insert(T aircraft)
    {
        return Insert(aircraft, 0);
    }

    public int Insert(T aircraft, int position)
    {
        if (position > getCount() || position < 0 || getCount() == _maxCount)
        {
            return -1;
        }

        _places.add(position, aircraft);

        return position;
    }

    public T Remove(int position)
    {
        if (position < getCount() && position >= 0)
        {
            if (_places.get(position) != null)
            {
                T result = _places.get(position);

                _places.remove(position);

                return result;
            }

            return null;
        }

        return null;
    }

    public T get(int position)
    {
        if (position < _maxCount && position >= 0 && position < getCount())
        {
            return _places.get(position);
        }
        return null;
    }
}