build model for parsing Json containing nested array using GSON

Question

i used json to pojo tools in order to parse the following json :

{
  "result": [
    {
      "orders": 5
    },
    {
      "orders": 20
    },
    [
      {
        "day": 16,
        "orders": 1
      }
    ]
  ]
}

json to pojo tools has generated the following two models

public class Result {

  @SerializedName("orders")
  @Expose
  private Long orders;

  public Long getOrders() {
      return orders;
  }

  public void setOrders(Long orders) {
      this.orders = orders;
  }
}

public class Example {

  @SerializedName("result")
  @Expose
  private List<Result> result = null;

  public List<Result> getResult() {
      return result;
  }

  public void setResult(List<Result> result) {
      this.result = result;
  }
}

However, it fails to parse the last json format, specially the nested array as it didn't include it in generated models. any body can assist ? Your response is appreciated.

I think problem is your json object. Delete [ { "day": 16, "orders": 1 } ] then it works fine — Kasım Özdemir
– Kasım Özdemir, Commented Mar 6, 2020 at 12:44
You need to Code your own custom TypeAdaptor for GSON you have created. Following link may help you: tutorialspoint.com/gson/gson_custom_adapters.htm — Mahdi Rajabi
– Mahdi Rajabi, Commented Mar 6, 2020 at 19:05

Nour Eldien Mohamed · Accepted Answer · 2020-03-06 12:20:00Z

1

try this after edit your Example class

public class Example {

    @SerializedName("result")
    @Expose
    private List<Result> result = null;

    public List<Result> getResult() {
        return result;
    }

    public void setResult(List<Result> result) {
        this.result = result;
    }

    public class Result {

        @SerializedName("orders")
        @Expose
        private Integer orders;

        public Integer getOrders() {
            return orders;
        }

        public void setOrders(Integer orders) {
            this.orders = orders;
        }

    }
}

I hope it will work with you .

answered Mar 6, 2020 at 12:20

Nour Eldien Mohamed

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