原型运行时架构和多态性问题

Question

我在Java中有一个类的层次结构，我想使用protostuff对其进行序列化和反序列化。

类如下(只是一个玩具示例(

class Wrapper {
    public List<Being> beings;
}
class Being {
    public Animal animal;
}
class Animal {
    public String sex;
    public int legs;
}
class Antelope extends Animal {
    public int speed;
    public String furType;
}
class Spider extends Animal {
    public int numberOfEyes;
    public int size;
}

我使用以下代码使用运行时架构生成来序列化和反序列化对象，如下所示

public static void main(String[] args) {
    LinkedBuffer buffer = LinkedBuffer.allocate(1024 * 1024);
    Being b1 = new Being();
    Antelope a1 = new Antelope();
    a1.legs = 4;
    a1.furType = "Fuzzy";
    a1.sex = "M";
    a1.speed = 70;
    b1.animal = a1;
    Being b2 = new Being();
    Spider s1 = new Spider();
    s1.legs = 4;
    s1.sex = "M";
    s1.numberOfEyes = 8;
    s1.size = 2;
    b2.animal = s1;
    Wrapper w = new Wrapper();
    w.beings = new ArrayList<>();
    w.beings.add(b1);
    w.beings.add(b2);
    // Serialize
    Schema<Wrapper> schema = RuntimeSchema.getSchema(Wrapper.class);
    byte[] data = ProtostuffIOUtil.toByteArray(w, schema, buffer);
    // Deserialize
    Wrapper w1 = schema.newMessage();
    ProtostuffIOUtil.mergeFrom(data, w1, schema);
    System.out.println(w1.beings.get(0).animal.getClass());
    System.out.println(w1.beings.get(1).animal.getClass());
}

问题是此代码的输出是

class Animal
class Animal

而不是

class Antelope
class Spider

如何在序列化/反序列化期间保留多态性信息？

我希望有人能帮助我

Answer 1

尝试启用相关测试中所述的系统属性：

https://github.com/protostuff/protostuff/blob/master/protostuff-runtime/src/test/java/io/protostuff/runtime/InheritanceTest.java