基于Enum的Jackson多态反序列化 [英] Jackson Polymorphic Deserialization based on Enum

问题描述

我正在使用 JacksonPolymorphicDeserialization ，这是我的代码，它反序列化为基于'type'属性：

I'm working with JacksonPolymorphicDeserialization, this is my code which deserializes into the proper class based in the 'type' property:

@JsonTypeInfo(  
    use = JsonTypeInfo.Id.NAME,  
    include = JsonTypeInfo.As.PROPERTY,  
    property = "type",
    defaultImpl = Event.class, 
    visible = true)  
@JsonSubTypes({        
    @Type(value = SpecialEvent1.class, name = "SPECIAL_EVENT_1"), 
    @Type(value = SpecialEvent2.class, name = "SPECIAL_EVENT_2"), 
    })  
public abstract class AbstractEvent {

    private String type;

    public String getType() {
    return type;
    }

    public void setType(String type) {
    this.type = type;
    }   
}

它工作正常，我的json变成了预期的类根据'type'值。

It's working perfectly and my json turns into the expected class according to the 'type' value.

但是，我正在考虑将'type'属性从String移动到Enum，这是我的新代码：

However, I'm considering to move the 'type' property from String to Enum, this is my new code with this change:

@JsonTypeInfo(  
    use = JsonTypeInfo.Id.NAME,  
    include = JsonTypeInfo.As.PROPERTY,  
    property = "type",
    defaultImpl = Event.class, 
    visible = true)  
@JsonSubTypes({        
    @Type(value = SpecialEvent1.class, name = "SPECIAL_EVENT_1"), 
    @Type(value = SpecialEvent2.class, name = "SPECIAL_EVENT_2"), 
    })  
public abstract class AbstractEvent {

    private EventType type;

    public EventType getType() {
    return type;
    }

    public void setType(EventType type) {
    this.type = type;
    }   
}

和枚举：

public enum EventType {
    SPECIAL_EVENT_1,
    SPECIAL_EVENT_2,
    EVENT;
}

问题是第二种方法不起作用......任何想法为什么???我可以在这里使用Enum吗？

The problem is that this second approach is not working... any idea why??? can I use Enum here???

谢谢！

推荐答案

固定！

适用于jackson 2.0 !!

It works with jackson 2.0!!

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