CODEWITHSUNDEEP
javajsonjacksonjson-deserialization
Piotr Supel
Piotr Supel

Reputation: 67

How to unwrap more than one Map<String,String> to Json

How to unwrap more than one Map to JSON. Example

public class Class {
Map<String,String> firstMap;
Map<String,String> secondMap;
}

I can use @JsonAnyGetter only for one Map field. I know also that I can use custom Serializer, but I've got more fields in class for which I don't want to change the deserialization method. Preferable JSON output:

{
    "Name": "Name",
    "LastName": "LastName",
    "firstMapKey": "firstMapValue"
    "secondMapKey": "secondMapValue"
}

Instead of:

{
    "Name": "Name",
    "LastName": "LastName",
    "firstMap": {
        "firstMapKey": "firstMapValue"
    },
    "secondMap": {
        "secondMapKey": "secondMapValue"
    }
}

Upvotes: 0

Views: 921

Answers (1)

Piotr Supel
Piotr Supel

Reputation: 67

@JonK helped me: I've added one additional Map and merge both Maps into it. For the additional map, I used @JsonAnyGetter and @JsonIgnore for both Maps used to merge.

public class Class {
    @JsonIgnore
    Map<String,String> firstMap;
    @JsonIgnore
    Map<String,String> secondMap;

    Map<String,String> compositeMap

    @JsonAnyGetter
    public Map<String, String> getCompositeMap() {
        return compositeMap;
    }

    @JsonAnySetter
    public void setCompositeMap(Map<String, String> compositeMap) {
        this.compositeMap = compositeMap;
    }

}

Upvotes: 3

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