JSON Mapper

What is it?

Small mapper for JSONs. It allows you to convert one object to another with minimal effort. It's similar to Ember-json-mapper, but without any dependencies.

Installing

bower i json-mapper

Demo

Usage examples

Basic

var map = { a: 'a', c: 'b' };
var source = { a: 1, b: 2 };
var mapped = jsonMapper.map(source, map); // { a: 1, c: 2 }

Nested objects

var map = { a: 'a', d: 'b.c' };
var source = { a: 1, b: { c: 2 } };
var mapped = jsonMapper.map(source, map); // { a: 1, d: 2 }

Nested keys

var map = { a: 'a', 'd.e': 'b' };
var source = { a: 1, b: 2 };
var mapped = jsonMapper.map(source, map); // { a: 1, d: { e: 2 } }

Nested objects and nested keys

var map = { a: 'a', 'd.e': 'b.c' };
var source = { a: 1, b: { c: 2 } };
var mapped = jsonMapper.map(source, map); // { a: 1, d: { e: 2 } }

Objects as keys

var map = { a: 'a', c: { key: 'b' } };
var source = { a: 1, b: 2 };
var mapped = jsonMapper.map(source, map); // { a: 1, c: 2 }

With default value

var map = { a: 'a', c: { key: 'b', default: 3 } };
var source = { a: 1, b: 2 };
var mapped = jsonMapper.map(source, map); // { a: 1, c: 2 }

Set value without mapping from source

var map = { a: 'a', c: { default: 3 } };
var source = { a: 1, b: 2 };
var mapped = jsonMapper.map(source, map); // { a: 1, c: 3 }

Custom getter

var map = { a: 'a', 'b': { custom: function (source) {
  return source.b.c + 1;
} } };
var source = { a: 1, b: { c: 2 } };
var mapped = jsonMapper.map(source, map); // { a: 1, b: 3 }

Array-properties mapping

var map = { a: 'a', d: { key: 'b', map: { c: 'c' } } };
var source = { a: 1, b: [
  {c: 1, d: 1},
  {c: 2, d: 2}
] };
var mapped = jsonMapper.map(source, map); // { a: 1, d: [ {c: 1}, {c: 2} ] }

var map = { a: 'a', d: { key: 'b', map: { c: 'c', f: { default: 2 } } } };
var source = { a: 1, b: [
  {c: 1, d: 1},
  {c: 2, d: 2}
] };
var mapped = jsonMapper.map(source, map); // { a: 1, d: [ {c: 1, f: 2}, {c: 2, f: 2} ] }

Multi-nesting

var map = { a: 'a', d: { key: 'b', map: { c: 'c', v: { key: 'd', map: { e1: 'e', f1: 'f' } } } } };
var source = { a: 1, b: [
  {c: 1, d: [
    { e: 3, f: 4 }
  ] },
  {c: 2, d: [
    { e: 5, f: 6 }
  ] }
] };
var mapped = jsonMapper.map(source, map); // { a: 1, d: [ {c: 1, v: [ { e1: 3, f1: 4 } ] }, {c: 2, v: [ { e1: 5, f1: 6 } ] } ] }

Custom getter for nested objects

var map = { a: 'a', d: { key: 'b', map: { c: 'c', v: { key: 'd', map: { e1: 'e', f1: { custom: function(source) {
  return source.f + 1;
} } } } } } };
var source = { a: 1, b: [
  {c: 1, d: [
    { e: 3, f: 4 }
  ] },
  {c: 2, d: [
    { e: 5, f: 6 }
  ] }
] };
var mapped = jsonMapper.map(source, map); // { a: 1, d: [ {c: 1, v: [ { e1: 3, f1: 5 } ] }, {c: 2, v: [ { e1: 5, f1: 7 } ] } ] }

Json-mapper

Map one object to another

JSON Mapper

What is it?

Installing

Demo

Usage examples