Documentation for gololang.JSON

A set of useful APIs for dealing with JSON documents from Golo.

The implementation is backed by json-simple. While json-simple only supports encoding from lists and maps, this API brings support for sets, arrays, Golo tuples, dynamic objects and structs.



JSON augmentations for structs.


Conveniently adds a toJSON() method, which is equivalent to calling JSON.stringify():

struct Person = { name, age, email }
# (...)

Person("Mr Bean", "", 64): toJSON()

updateFromJSON(this, str)

Populates the elements of a struct based on the values found in a JSON string.

let str = JSON.stringify(map[
  ["name", "Foo"],
  ["email", ""],
  ["age", 99],
  ["gender", "N/A"]
let foo = Person(): updateFromJSON(str)

Note that missing entries from the JSON data yield null values in the struct.



Provides a mixin for dynamic objects that includes a toJSON() method:

object: mixin(JSON.dynamicObjectMixin()): toJSON()

which is equivalent to:



Parses a JSON string and gives an object representation as a list or map collection:

let data = JSON.parse(text)
println(data: get("name"))


Takes any know object, and gives a JSON string representation:

let data = map[
  ["name", "Somebody"],
  ["age", 69],
  ["friends", list[
    "Mr Bean", "John B", "Larry"
let asText = JSON.stringify(data)

obj may be a list, an array, a set, a map, a tuple, a dynamic object or a struct. If obj is from another type then its string representation is given according to obj: toString() or "null" if obj is null.


Returns a new dynamic object from a JSON string where each first-level entry is mapped into the dynamic object:

let obj = JSON.toDynamicObject(JSON.stringify(map[
  ["a", "1"], ["b", "2"]

println(obj: a())
println(obj: b())