The Definitive ANTLR 4 Reference, 2nd Edition

Translating JSON to XML

Lots of web services return JSON data, and we might run into a situation where we want to feed some JSON data into existing code that accepts only XML. Let’s use our JSON grammar from ​Parsing JSON​ as a foundation to build a JSON to XML translator. Our goal is to read in JSON text like this:

listeners/t.json

{
    ​"description"​ ​:​ ​"An imaginary server config file"​,
    ​"logs"​ ​:​ {​"level"​​:​​"verbose"​, ​"dir"​​:​​"/var/log"​},
    ​"host"​ ​:​ ​"antlr.org"​,
    ​"admin"​​:​ [​"parrt"​, ​"tombu"​],
    ​"aliases"​​:​ []
}

and emit XML in an equivalent form, like this:

<description>An imaginary server config ...