public class VectorRepo {
    private List<IVector> vectorList;

    public void addVector(IVector v) {
        this.vectorList.add(v);
    }

    public void removeVector(IVector v) {
        this.vectorList.remove(v);
    }

    public IVector getVector(double[] v) {
        double length = v.length;

        for(IVector vector : vectorList) {
            if(vector instanceof Vector3D && length == 3) {
                if(vector.getVx() == v[0] && vector.getVy() == v[1] && ((Vector3D)vector).getVz() == v[2]) {
                    return vector;
                }
            } else if (vector instanceof Vector && length == 2) {
                if(vector.getVx() == v[0] && vector.getVy() == v[1]) {
                    return vector;
                }
            } else continue;
        }
        return null;
    }
}