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 file</description>
<logs>
    <level>verbose</level>
    <dir>/var/log</dir>
</logs>
<host>antlr.org</host> ...