Validate JSON Object

[root]

I have the following JSON object coming from a web-service. I need to perform some validations on the object before consuming it.

• I need to ensure that it contains
  • RESULT_1
  • RESULT_2
  • RESULT_15
• Set an exception/ warning if the data array is empty (like RESULT_15)

What is the best way to achieve this? I could not find any validation information I can plug into tExtractJsonFields component.

Any help is appreciated. Thank you.

{
	"RESULT_1": {
		"columns": ["col1", "col2", "col3", "col4"],
		"data": [
			["0", null, "12345", "other"],
			["1", "a", "54321", "MA"],
			["0", null, "76543", "RI"]
		]
	},
	"RESULT_2": {
		"columns": ["c1", "c2", "c3", "c4"],
		"data": [
			["", "", "1877", "9"],
			["NULL", "Yellow", "1983", "2"],
			["NULL", "Red", "1981", "0"]
		]
	},
	"RESULT_15": {
		"columns": ["c1", "c2", "c3", "c4"],
		"data": [
			
		]
	}
}