Converting Json into a DTO array

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I have an interesting JSON parsing problem, at least to me since I am doing this for the first time. I have the following sample JSON and I want to map it to equivalent DTOs:

{
    "modules":
    [
        {
            "name":"module1",
            "shortId":23425,
            "pmns":
            [
                {
                    "name":"pmn1",
                    "position":1,
                    "pmnType":"D3"
                },
                {
                    "name":"pmn3",
                    "position":3,
                    "pmnType":"R2"
                },
                {
                    "name":"pmn7",
                    "position":5,
                    "pmnType":"S1"
                },
            ]
        },
        {
            "name":"module2",
            "shortId":1572,
            "pmns":
            [
                {
                    "name":"pmn1",
                    "position":3,
                    "pmnType":"D3"
                },
                {
                    "name":"pmn12",
                    "position":35,
                    "pmnType":"R2"
                },
            ]
        }
    ]
}

This is my ModuleDTO class:

public class ModuleDTO {

    private String _name;
    private short _shortId;
    private PmnDTO[] _pmns;

    public String getName() {
        return _name;
    }

    public short getShortId() {
        return _shortId;
    }

    public PmnDTO[] getPmns() {
        return _pmns;
    }

    @JsonProperty("name")
    public void setName(String name) {
        this._name = name;
    }

    @JsonProperty("shortId")
    public void setShortId(short shortId) {
        this._shortId = shortId;
    }

    @JsonProperty("pmns")
    public void setPmns(PmnDTO[] pmns) {
        this._pmns = pmns;
    }

}

Not copied here but my PmnDTO class is similar, i.e. getters and setters for each property in the pmn object of JSON.

I wrote the following code to try to map it to DTO. The library I am using is com.FasterXml.jackson (version 2.3.1)

// Got the response, construct a DTOs out of it ...
ObjectMapper mapper = new ObjectMapper();
StringReader reader = new StringReader(response); // Json Response

// Convert the JSON response to appropriate DTO ...
ModuleDTO moduleDto = mapper.readValue(reader, ModuleDTO.class);

Obviously, this code didn't work. Can someone tell, how can I map the JSON response to my DTOs, given that "modules" is an array in the JSON and it also contains a variable size array within itself.

Thank You.

(*Vipul)() ;

asked 1 min ago

sgsi

8