java.lang.IllegalArgumentException: Invalid JSON expression: Script1.groovy: 1: unexpected token: ] # line 1, column 36. weather[*].description - rest-assured

Question

I am new to RestAssured and trying to the following code:
#Test
public void testJsonPath() {
Response response = RestAssured
.given()
.param("id", "2172797")
.param("appid", "439d4b804bc8187953eb36d2a8c26a02")
.when()
.get("https://samples.openweathermap.org/data/2.5/weather");
String value = "weather[*].description";
System.out.println(value);
String data = response.then().contentType(ContentType.JSON).extract().path(value);
System.out.println(data);
}
JSON:
{
"coord": {
"lon": 145.77,
"lat": -16.92
},
"weather": [
{
"id": 802,
"main": "Clouds",
"description": "scattered clouds",
"icon": "03n"
}
],
"base": "stations",
"main": {
"temp": 300.15,
"pressure": 1007,
"humidity": 74,
"temp_min": 300.15,
"temp_max": 300.15
},
"visibility": 10000,
"wind": {
"speed": 3.6,
"deg": 160
},
"clouds": {
"all": 40
},
"dt": 1485790200,
"sys": {
"type": 1,
"id": 8166,
"message": 0.2064,
"country": "AU",
"sunrise": 1485720272,
"sunset": 1485766550
},
"id": 2172797,
"name": "Cairns",
"cod": 200
}
Getting the following error:
java.lang.IllegalArgumentException: Invalid JSON expression:
Script1.groovy: 1: unexpected token: ] # line 1, column 36.
weather[*].description
Why do we get the following error when using * ?. When replacing it String value = "weather[0].description"; it works fine. Can someone please help me with this.
I have checked the postman as well and the API is giving the correct output.
Note: When using creating code (weather[*].description) from http://jsonpath.com/. It gives the same output.
If there is anything I am missing anything please let me know as I am new to it. Any help to this would be great.
It can also be great if someone can give me a brief on this and let me know whom to refer to get the best output from this.
Why do we get the following error when using * ?. When replacing it String value = "weather[0].description"; it works fine. Can someone please help me with this.

Answer 1

Rest Assured uses Groovy's GPath notation and is not to be confused with Jayway's JsonPath syntax
Official Documentation
GPath
JsonPath
Edit :
{"users":[{"firstName":"sijo","lastName":"john","subjectId":1,"id":1},{"firstName":"sonia","lastName":"sahay","subjectId":2,"id":2},{"firstName":"shreya","lastName":"sahay","subjectId":1,"id":3}],"subjects":[{"id":1,"name":"Devops"},{"id":2,"name":"SDET"}]}
For the above JSON you can use the below to fetch all the lastName
JsonPath abc = new JsonPath(res);
String deal = abc.getString("users.lastName");
System.out.println(deal);