Dart

Demonstrates how to Handle Large Integers in JSON

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Demonstrates how to handle large integers in JSON. (Integers larger than what can fit in a 32-bit signed integer.) Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // Let's say your JSON has this:

  // {
  // 	"id": 20000000001234567
  // }

  final json = CkJsonObject();

  try {
    json.loadFile('qa_data/json/large_int.json');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // The integer is too large for a 32-bit signed integer that is returned by IntOf.
  // The result will be something that wrapped around and could be negative.
  // In this case it would be: -543893881
  final id = json.intOf('id');
  print('id: $id');

  // The solution is to read the integer value as a string, and then use the features in your programming language
  // to convert from a string to a 64-bit integer.
  // 
  // Alternatively, you may wish to simply hold the value as a string.  If, for example, the integer simply references
  // an order ID, an account ID, etc., then there's no need to convert to an integer value.  You're not going to be doing
  // mathematical operations on it anyway.  This is usually the case for large integers -- they typically exist
  // in JSON as an account ID.

  // You can get any JSON value as a string:
  final accountId = json.stringOf('id');
  print('accountId: $accountId');

  // Sample output:

  // id: -543893881
  // accountId: 20000000001234567
}