Convert JSON structure into Array : Groovy

Question

I have below payload and I want to convert schedule elements into array with square brackets .

{
   "value":{
      "ID":"1c1238c8-3517-47c7-83de-6269fa6098cc",
      "scheduleElements":{
         "ID":"92a1352d-8319-4e1a-b921-0d7d0ee9f59e",
         "parentItem_ID":"1c1238c8-3517-47c7-83de-6269fa6098cc",
         "startDate":"2025-05-30",
      }
   }
}

I want to convert as below payload how do I do that ?

"value":{
      "ID":"1c1238c8-3517-47c7-83de-6269fa6098cc",
      "scheduleElements":**[**{
         "ID":"92a1352d-8319-4e1a-b921-0d7d0ee9f59e",
         "parentItem_ID":"1c1238c8-3517-47c7-83de-6269fa6098cc",
         "startDate":"2025-05-30",
      }**]**
   }
}

Please add the code you have tried and how it failed (e.g. errors, stacktraces, logs, ...) so we can improve on it. — cfrick
– cfrick, Commented Apr 8, 2021 at 6:08

Matias Bjarland · Accepted Answer · 2021-04-08 06:02:43Z

The following code:

import groovy.json.*

def data = '''
{
   "value":{
      "ID":"1c1238c8-3517-47c7-83de-6269fa6098cc",
      "scheduleElements":{
         "ID":"92a1352d-8319-4e1a-b921-0d7d0ee9f59e",
         "parentItem_ID":"1c1238c8-3517-47c7-83de-6269fa6098cc",
         "startDate":"2025-05-30",
      }
   }
}
'''

def json = new JsonSlurper().parseText(data)

json.value.scheduleElements = [json.value.scheduleElements]

def result = JsonOutput.prettyPrint(JsonOutput.toJson(json))

println result

when executed, prints:

─➤ groovy solution.groovy
{
    "value": {
        "ID": "1c1238c8-3517-47c7-83de-6269fa6098cc",
        "scheduleElements": [
            {
                "ID": "92a1352d-8319-4e1a-b921-0d7d0ee9f59e",
                "parentItem_ID": "1c1238c8-3517-47c7-83de-6269fa6098cc",
                "startDate": "2025-05-30"
            }
        ]
    }
}

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