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Retrieve JSON Data on Conditional logic using JsonPath in REST Assured

There is possibility that data is deleted and added so you can not always rely on index. Suppose you want to retrieve Data based on some conditions. Again this is as simple as you use conditional logic in Java. Consider below Example, we will retrieve all the detail of the user for which given input email matches.

Endpoint: https://reqres.in/api/users?page=2

JSON Response:

{
    "page": 2,
    "per_page": 6,
    "total": 12,
    "total_pages": 2,
    "data": [
        {
            "id": 7,
            "email": "michael.lawson@reqres.in",
            "first_name": "Michael",
            "last_name": "Lawson",
            "avatar": "https://s3.amazonaws.com/uifaces/faces/twitter/follettkyle/128.jpg"
        },
        {
            "id": 8,
            "email": "lindsay.ferguson@reqres.in",
            "first_name": "Lindsay",
            "last_name": "Ferguson",
            "avatar": "https://s3.amazonaws.com/uifaces/faces/twitter/araa3185/128.jpg"
        },
        {
            "id": 9,
            "email": "tobias.funke@reqres.in",
            "first_name": "Tobias",
            "last_name": "Funke",
            "avatar": "https://s3.amazonaws.com/uifaces/faces/twitter/vivekprvr/128.jpg"
        },
        {
            "id": 10,
            "email": "byron.fields@reqres.in",
            "first_name": "Byron",
            "last_name": "Fields",
            "avatar": "https://s3.amazonaws.com/uifaces/faces/twitter/russoedu/128.jpg"
        },
        {
            "id": 11,
            "email": "george.edwards@reqres.in",
            "first_name": "George",
            "last_name": "Edwards",
            "avatar": "https://s3.amazonaws.com/uifaces/faces/twitter/mrmoiree/128.jpg"
        },
        {
            "id": 12,
            "email": "rachel.howell@reqres.in",
            "first_name": "Rachel",
            "last_name": "Howell",
            "avatar": "https://s3.amazonaws.com/uifaces/faces/twitter/hebertialmeida/128.jpg"
        }
    ],
    "ad": {
        "company": "StatusCode Weekly",
        "url": "http://statuscode.org/",
        "text": "A weekly newsletter focusing on software development, infrastructure, the server, performance, and the stack end of things."
    }
}

Code:

public class ReqRes 
{
	public static String id = "2";
	
	@BeforeClass
	public void setup()
	{
		RestAssured.baseURI = "https://reqres.in/";
		RestAssured.basePath = "api";
	}

	@Test(enabled=true)
	public void ConditionalLogic()
	{
		Response res = given()
			.queryParam("page", "2")
		.when()
			.get("/users/");
			
		JsonPath js = new JsonPath(res.asString());
		
		int size = js.getInt("data.size()");
		String email = "george.edwards@reqres.in";
		String temp = "";
		
		for(int i = 0; i < size; i++)
		{
			temp = js.getString("data["+i+"].email");
			if(temp.equals(email))
			{
				System.out.println(js.getString("data["+i+"]"));
				break;
			}
		}	
	}
}

Above code will print detail of george.edwards@reqres.in

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