PIbd-21_Anisin_R.S._DumpTru.../DumpTruck/Generics/SetGeneric.cs

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace DumpTruck.Generics
{
/// <summary>
/// Параметризованный набор объектов
/// </summary>
/// <typeparam name="T"></typeparam>
internal class SetGeneric<T>
where T : class
{
/// <summary>
/// Массив объектов, которые храним
/// </summary>
private readonly List<T?> _places;
/// <summary>
/// Количество объектов в массиве
/// </summary>
public int Count => _places.Count;
/// <summary>
/// Максимальное количество объектов в списке
/// </summary>
private readonly int _maxCount;
/// <summary>
/// Конструктор
/// </summary>
/// <param name="count"></param>
public SetGeneric(int count)
{
_maxCount = count;
_places = new List<T?>(count);
}
/// <summary>
/// Добавление объекта в набор
/// </summary>
/// <param name="truck">Добавляемый грузовик</param>
/// <returns></returns>
public int Insert(T truck)
{
return Insert(truck, 0);
}
/// <summary>
/// Добавление объекта в набор на конкретную позицию
/// </summary>
/// <param name="truck">Добавляемый грузовик</param>
/// <param name="position">Позиция</param>
/// <returns></returns>
public int Insert(T truck, int position)
{
if (position < 0 || position > Count || Count >= _maxCount) return -1;
_places.Insert(position, truck);
return position;
}
/// <summary>
/// Удаление объекта из набора с конкретной позиции
/// </summary>
/// <param name="position"></param>
/// <returns></returns>
public bool Remove(int position)
{
if (position < 0 || position >= Count) return false;
_places.RemoveAt(position);
return true;
}
/// <summary>
/// Получение объекта из набора по позиции
/// </summary>
/// <param name="position"></param>
/// <returns></returns>
public T? this[int position]
{
get
{
if (position < 0 || position >= Count) return null;
return _places[position];
}
set
{
if (position < 0 || position > Count || Count >= _maxCount) return;
_places.Insert(position, value);
}
}
/// <summary>
/// Проход по списку
/// </summary>
/// <returns></returns>
public IEnumerable<T?> GetTrucks(int? maxTrucks = null)
{
for (int i = 0; i < _places.Count; ++i)
{
yield return _places[i];
if (maxTrucks.HasValue && i == maxTrucks.Value)
{
yield break;
}
}
}
}
}