I have a requiremenet where I need to parse a user input comma separated string, and generate a graphql query out of it.
INPUT:

queryPath
fieldA.fieldB, fieldA.fieldC, fieldA.fieldD.fieldE, fieldA.fieldD.fieldF, fieldA.fieldD.fieldG

OUTPUT:

query{
    queryPath{
        fieldA{
            fieldB
            fieldC
            fieldD{
                fieldE
                fieldF
                fieldG
            }
        }
    }
}

I'm using Java to do this, thanks in advance.
EDIT: So far I've gotten the following output but unsure how to reach the expected output.

[[fieldA, fieldB],
[fieldA, fieldC],
[fieldA, fieldD, fieldE],
[fieldA, fieldD, fieldF],
[fieldA, fieldD, fieldG]]

Code:

Arrays.stream(stringInput.split(","))
    .map(s -> Arrays.stream(s.split("\\."))
        .map(String::trim)
        .collect(Collectors.toList()))
    .collect(Collectors.toList());

This title and content for this question was made by "Ahmad Shaikh" at this link: https://stackoverflow.com/questions/77569390/convert-a-comma-separated-string-of-fields-to-a-graphql-query-syntax. Contributions on stackoverflow.com are made under this license.