Java 当我们没有'；我没有访问源类的权限

我只想将对象的部分转换为JSON。我不能直接访问代码（我不能修改它），所以我必须使用mixin（我想）

现在我要做的是：

main.java

ObjectMapper marshaller = new ObjectMapper();

marshaller.setVisibility(
    new VisibilityChecker.Std(
        JsonAutoDetect.Visibility.NONE,
        JsonAutoDetect.Visibility.NONE,
        JsonAutoDetect.Visibility.NONE,
        JsonAutoDetect.Visibility.NONE,
        JsonAutoDetect.Visibility.NONE
    )
);

marshaller.addMixIn(FirstClass.class, FirstClassMixin.class);
marshaller.addMixIn(SecondClass.class, SecondClassMixin.class);

public interface FirstClassMixin {

    @JsonProperty
    @JsonUnwrapped
    SecondClass getSecondClass();
}

public interface SecondClassMixin {

    @JsonProperty("name")
    String getName();
}

FirstClassMixin.java

ObjectMapper marshaller = new ObjectMapper();

marshaller.setVisibility(
    new VisibilityChecker.Std(
        JsonAutoDetect.Visibility.NONE,
        JsonAutoDetect.Visibility.NONE,
        JsonAutoDetect.Visibility.NONE,
        JsonAutoDetect.Visibility.NONE,
        JsonAutoDetect.Visibility.NONE
    )
);

marshaller.addMixIn(FirstClass.class, FirstClassMixin.class);
marshaller.addMixIn(SecondClass.class, SecondClassMixin.class);

public interface FirstClassMixin {

    @JsonProperty
    @JsonUnwrapped
    SecondClass getSecondClass();
}

public interface SecondClassMixin {

    @JsonProperty("name")
    String getName();
}

SecondClass.java

ObjectMapper marshaller = new ObjectMapper();

marshaller.setVisibility(
    new VisibilityChecker.Std(
        JsonAutoDetect.Visibility.NONE,
        JsonAutoDetect.Visibility.NONE,
        JsonAutoDetect.Visibility.NONE,
        JsonAutoDetect.Visibility.NONE,
        JsonAutoDetect.Visibility.NONE
    )
);

marshaller.addMixIn(FirstClass.class, FirstClassMixin.class);
marshaller.addMixIn(SecondClass.class, SecondClassMixin.class);

public interface FirstClassMixin {

    @JsonProperty
    @JsonUnwrapped
    SecondClass getSecondClass();
}

public interface SecondClassMixin {

    @JsonProperty("name")
    String getName();
}

这很好，但是如果我继续添加类，例如

SecondClass

has

ThirdClass

和

ThirdClass

has

ForthClass

我就必须继续添加文件。对于大型类，这种情况会发生多次，并且无法直接从

FirstClass

访问

ForthClass

有没有办法压缩

FirstClassMixin.java

中的所有内容