Router.getInstance().getService()返回值能否改成泛型？

[liyujiang-gzu]

Router.getInstance().getService()返回值能否改成泛型？不然每次都得显式强制类型转换：

Object service = Router.getInstance().getService(...);
if (service != null) {
    IXXXService xxxService = (IXXXService) service;
}

改为泛型类型后自动隐式强转：

    public synchronized <T> T getService(String serviceName) {
        if (serviceName == null) {
            return null;
        }
        return (T) services.get(serviceName);
    }

IXXXService xxxService = Router.getInstance().getService(...);
if (service != null) {
    ...
}