Перевести С++ на Java

#ifndef _DLLTEST_H_
#define _DLLTEST_H_ 
 
#include <vector>
 
template<typename T>
struct Point
{
public:
    Point(T a, T b) :x(a), y(b){}
    T x;
    T y;
};
template <class T>
extern "C" __declspec(dllexport)  bool pt_in_polygon2(const T &test, const std::vector<Point<double>> &polygon)
{
 
    static const int q_patt[2][2] = { { 0, 1 }, { 3, 2 } };
 
    if (polygon.size()<3) return false;
 
    std::vector<Point<double>>::const_iterator end = polygon.end();
    T pred_pt = polygon.back();
    pred_pt.x -= test.x;
    pred_pt.y -= test.y;
 
    int pred_q = q_patt[pred_pt.y<0][pred_pt.x<0];
 
    int w = 0;
 
    for (std::vector<Point<double>>::const_iterator iter = polygon.begin(); iter != end; ++iter)
    {
        T cur_pt = *iter;
 
        cur_pt.x -= test.x;
        cur_pt.y -= test.y;
 
        int q = q_patt[cur_pt.y<0][cur_pt.x<0];
 
        switch (q - pred_q)
        {
        case -3:++w; break;
        case 3:--w; break;
        case -2:if (pred_pt.x*cur_pt.y > pred_pt.y*cur_pt.x) ++w; break;
        case 2:if (!(pred_pt.x*cur_pt.y > pred_pt.y*cur_pt.x)) --w; break;
        }
 
        pred_pt = cur_pt;
        pred_q = q;
 
    }
 
    return w != 0;
 
}
#endif

int q = q_patt[cur_pt.y<0][cur_pt.x<0];

int q = q_patt[cur_pt.y < 0 ? 1 : 0][cur_pt.x < 0 ? 1 : 0]