GSON 没有为接口类型调用我的 TypeAdapter

GSON似乎正在做某种技巧，它查看我的JavaBeans的内部字段，而不是使用可公开访问的属性信息。不幸的是，这对我们来说不会飞，因为我们神奇创造的豆子充满了私人领域，我不希望它储存起来。

@Test
public void testJson() throws Exception
{
    Player player = new MagicPlayer(); //BeanUtils.createDefault(Player.class);
    player.setName("Alice");

    Gson gson = new GsonBuilder()
        .registerTypeAdapter(Player.class, new PlayerTypeAdapter())
        .create();

    System.out.println(gson.toJson(bean));
}

private static class PlayerTypeAdapter implements JsonSerializer<Player>
{
    @Override
    public JsonElement serialize(Player player, Type type,
                                 JsonSerializationContext context)
    {
        throw new RuntimeException("I got called, woohoo");
    }
}

public static interface Player //extends SupportsPropertyChanges
{
    public String getName();
    public void setName(String name);
}

// Simple implementation simulating what we're doing.
public static class MagicPlayer implements Player
{
    private final String privateStuff = "secret";
    private String name;

    @Override
    public String getName()
    {
        return name;
    }

    @Override
    public void setName(String name)
    {
        this.name = name;
    }
}

这给出了：

{"privateStuff":"secret","name":"Alice"}

当然，永远不要调用我的类型适配器，这似乎使得不可能获得任何其他行为。