A partial mapping of one of my indices (in ES6.2) is as follows

```
"sdata": {
"type": "object",
"dynamic": true,
"properties": {
"xyz": {
"dynamic": true,
"properties": {}
},
"students": {
"dynamic": true,
"properties": {
"name_age": {
"dynamic": "true",
"type": "object",
"properties": {
}
},
"school_id": {
"type": "integer"
}
}
}
}
}
```

and one sample doc of that index is as follows:

```
{
"sdata": {
"xyz": {
"abc": 0,
"def": 0,
"klm": null
},
"students": {
"roll_age": {
1021: 27,
99271: 12,
5119: 21,
},
"school_id": 12
}
}
}
```

I have a painless script in which my goal is to do a custom scoring calculation based on supplied student's roll number (that is a random number). For example, if

student roll is 99271, then it should return score 12

I tried to write a script in the following two ways - option1 and option2 below. None of them worked.

```
"script": {
"params": {
"student_roll": 99271
},
"source": """
// option - 1
if (doc['sdata.students.roll_age'].containsKey(params.student_roll)) {
// how to return the value?
}
// option - 2
int ilen = doc['sdata.students.roll_age'].length;
for (int i = 0; i < ilen; i++) {
if(doc['sdata.students.roll_age'][i] == params.student_roll) {
return doc['sdata.students.roll_age'][i];
}
}
"""
}
```

Any idea how to get it through painless script?