java - 如果 Class 我如何获得一个泛型类型来匹配用途？扩展类型？

Question

给定这个原型：

public static <C extends SetComposite, S extends Iterable<U>, U> boolean
eligibleForInclusion(C me, Class<C> clazz, List<S> members) throws TypeCollisionException {
    ...
}

这个呼叫站点：

public void include(RestaurantSet member) {
    if (SetCompositeUtils.<RestaurantSetComposite, RestaurantSet, Restaurant>
            eligibleForInclusion(this, this.getClass(), Arrays.asList(member))) {
        inc.add(member);
    }
}

Eclipse 编译器给出了这个错误：

The parameterized method <RestaurantSetComposite, RestaurantSet, Restaurant>eligibleForInclusion(RestaurantSetComposite, Class<RestaurantSetComposite>, List<RestaurantSet>) of type SetCompositeUtils is not applicable for the arguments (RestaurantSetComposite, Class<capture#1-of ? extends RestaurantSetComposite>, List<RestaurantSet>)

如果我没看错，Class<capture#1-of ? extends RestaurantSetComposite>就是不匹配Class<RestaurantSetComposite>。我能以某种方式解决这个问题吗？

Answer 1

因为你可能是子类this的一个实例，可能不完全是，所以你需要this.getClass()RestaurantSetComposite.class

public static <C extends SetComposite, S extends Iterable<U>, U> boolean
eligibleForInclusion(C me, Class<? extends C> clazz, List<S> members) throws TypeCollisionException {
    ...
}