How to map Json object to pojo, if JSON has duplicate keys in object

Question

Below is the example of JSON object.

{  
   "primaryAccountNumber":"4353453",
   "processingCode":"3453",
   "transactionAmount":"34534",
   "transmissionDateTime":"34534",
   "receiptsFields":{  
      "line":"BHN VALIDATION - DAR",
      "line":"Phone",
      "line":":Amount: 25.00",
      "line":"BHN Order ID: 9GMAQH0",
      "line":"ALL SALES FINAL",
      "line":"Terms and Conditions",
      "line":"Store ID: 06220",
      "line":"redemptionAccountNumber",
      "line":"",
      "line":"",
      "line":"",
      "line":"",
      "line":"",
      "line":"",
      "line":"",
      "line":"",
      "line":":"
   },
   "termsAndConditions":"Terms and Conditions of the card will be displayed in this area. The maximum characters allowed are nine hundred and ninety nine (999)."
}

What will be the type of receiptsFields to map in POJO ? For example transmissionDateTime we have String. Same suggest me type for receiptsFields so that response will map into pojo automatically.

It will be object... you can also use below link to convert json to pojo http://www.jsonschema2pojo.org/ — Amit, Aug 21 '19 at 11:47

Thomas Martin · Answer 1 · 2019-08-21T12:00:30.943

-1

The name of your type does not matter, as long as it has the right properties in it. In your case something like

public class ReceiptField{
    public String line;
}

However, I don't think this JSON does what you want to achieve. In your receiptsFields property, all properties are named line, so only the last one will be taken into account (being ":" in your example). An array seems a better fit here.

EDIT : To answer your comment, do you have control on the input JSON ? If so it would be :

 {
  "primaryAccountNumber": "4353453",
  "processingCode": "3453",
  "transactionAmount": "34534",
  "transmissionDateTime": "34534",
  "receiptsFields": [
    "BHN VALIDATION - DAR",
    "Phone",
    ":Amount: 25.00",
    "BHN Order ID: 9GMAQH0",
    "ALL SALES FINAL",
    "Terms and Conditions",
    "Store ID: 06220",
    "redemptionAccountNumber",
    "",
    "",
    "",
    "",
    "",
    "",
    "",
    "",
    ":"
  ],
  "termsAndConditions": "Terms and Conditions of the card will be displayed in this area. The maximum characters allowed are nine hundred and ninety nine (999)."
}

edited Aug 21 '19 at 12:00

answered Aug 21 '19 at 11:51

Thomas Martin

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8
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you are right. For Now I am getting ":" only. Can you please give me example for Array ? like how we can handle – Gaurav Khandelwal Aug 21 '19 at 11:53
See my edit, it supposes to change the JSON input though. – Thomas Martin Aug 21 '19 at 12:01
No I dont have Control over Input Json. Input JSON will be same like that. We cant change input String. – Gaurav Khandelwal Aug 21 '19 at 12:09
1

Then if you need all information in receiptFields, I'm afraid you have no other choice than parsing it manually, because as @Jaboy mentionned, non unique property names aren't suppose to occur. My advice is to do string manipulation to transform input JSON into what I suggested, then parse it into an object. – Thomas Martin Aug 21 '19 at 12:15

How to map Json object to pojo, if JSON has duplicate keys in object

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