PIbd-21_Bakalskaya_E.D._ElectricLocomotive._HARD/ProjectElectricLocomotive/LocomotiveGenericCollection.java

package ProjectElectricLocomotive;

import java.awt.*;

public class LocomotiveGenericCollection<T extends DrawingLocomotive,U extends IMoveableObject>
{
    //ширина/высота окна
    private final int _pictureWidth;
    private final int _pictureHeight;

    //ширина/высота занимаемого места
    private final int _placeSizeWidth = 150;
    private final int _placeSizeHeight = 50;

    /// Набор объектов
    private final SetGeneric<T> _collection;

    public LocomotiveGenericCollection(int picWidth, int picHeight)
    {
        int width = picWidth / _placeSizeWidth;
        int height = picHeight / _placeSizeHeight;
        _pictureWidth = picWidth;
        _pictureHeight = picHeight;
        _collection = new SetGeneric<T>(width*height);
    }

    public Iterable<T> GetLocomotives(){
        return _collection.GetEnumerator();
    }

    /// Перегрузка оператора сложения
    //да емае, почему в яве все по-другому?...
    public int AddOverload(T obj){
        if(obj == null){
            return -1;
        }
        return _collection.Insert(obj);
    }

    public T SubOverload(int pos)
    {
        T loco = _collection.Get(pos);
        if (loco != null)
        {
            _collection.Remove(pos);
        }
        else{
            throw new LocoNotFoundException(pos);
        }
        return loco;
    }

    // получение объекта imoveableObj
    public U GetU(int pos)
    {
        return (U)_collection.Get(pos).GetMoveableObject();
    }

    /// Вывод всего набора объектов
    public void ShowLocomotives(Graphics gr)
    {
        DrawBackground(gr);
        DrawObjects(gr);
    }
    private void DrawBackground(Graphics g)
    {
        Color blackColor = Color.BLACK;
        g.setColor(blackColor);
        for (int i = 0; i < _pictureWidth / _placeSizeWidth; i++)
        {
            for (int j = 0; j < _pictureHeight / _placeSizeHeight + 1; ++j)
            {
                //линия рамзетки места
                g.drawLine(i * _placeSizeWidth, j * _placeSizeHeight, i * _placeSizeWidth + _placeSizeWidth / 2, j * _placeSizeHeight);
            }
            g.drawLine(i * _placeSizeWidth, 0, i * _placeSizeWidth, _pictureHeight / _placeSizeHeight * _placeSizeHeight);
        }
    }

    private void DrawObjects(Graphics g)
    {
        int HeightObjCount = _pictureHeight / _placeSizeHeight;
        int i = 0;
        for (var obj : _collection.GetEnumerator())
        {
            if (obj != null)
            {
                obj.SetPosition(
                        (int)(i / HeightObjCount * _placeSizeWidth),
                        (HeightObjCount - 1) * _placeSizeHeight - (int)(i % HeightObjCount * _placeSizeHeight)
                );
                obj.DrawTransport(g);
            }
            i++;
        }
    }

    public void clear() {
        _collection.clear();
    }
}