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Jackson - Deserialize using generic class

Asked 2012-07-26T08:02:16.180
254

I have a json string, which I should deSerialize to the following class

class Data <T> {
    int found;
    Class<T> hits
}

How do I do it? This is the usual way

mapper.readValue(jsonString, Data.class);

But how do I mention what T stands for?

java json generics jackson
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1 Answer

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First thing you do is serialize, then you can do deserialize.
so when you do serialize, you should use @JsonTypeInfo to let jackson write class information into your json data. What you can do is like this: 

Class Data <T> {
    int found;
    @JsonTypeInfo(use=JsonTypeInfo.Id.CLASS, include=JsonTypeInfo.As.PROPERTY, property="@class")
    Class<T> hits
}

Then when you deserialize, you will find jackson has deserialize your data into a class which your variable hits actually is at runtime.

answered 2013-01-07T10:06:28.433

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