json library

A range of utility modules and functions to work with json or js objects.

currently includes

• json pointer implementation pointer.get and pointer.set, which creates objects on its path and pointer.delete, to remove a property or item

• json query a json pointer supporting glob-pattern #/usr/**/*/passphrase, filters #/input/*?valid:true and simple regular expressions #/input/{name-.*}/id

• json relation, a relationship definition and utilities to setup and deconstruct relationships between objects

For an up-to-date documentation refer to corresponding unit tests in */test/unit/

Contents

• Installation
• Usage
• Why
  • JsonPointer
  • JsonQuery
  • Json
  • JsonRelation

Installation

bower

bower install json-library

will install bower_components/json-library, where by default /dist/JsonLibrary.min.js will be loaded. This includes the complete json-library package, which is exposed to window.JsonLibrary, if not otherwise required. Additional versions included are

• /dist/JsonLibrary.pointer.min.js exposing window.JsonPointer only
• /dist/JsonLibrary.query.min.js exposing window.JsonQuery only
• /dist/JsonLibrary.base.min.js exposing window.JsonLibrary, excluding all relation utilities

npm

npm install json-library

you can also directly require separate modules with require("json-libary/pointer") and require("json-libary/query")

Usage

For a full API see lib README for an overview and its nested packages for details.

pointer

var pointer = require("json-library").pointer;
// get value of data at json pointer
var value = pointer.get({"a":{"b"}:[{"id":"target"}]}, "#/a/b/0/id"); // target
// add properties by pointer on data
var object = pointer.set({}, "#/a/b/[0]/id", "target"); // {"a":{"b"}:[{"id":"target"}]}
// delete properties or items
var object = pointer.delete({"a":{"b"}:[{"id":"target"}]}, "#/a/b/0"); // {"a":{"b"}:[]}
// join arguments to a valid json pointer
var pointerToTarget = pointer.join("#/a", "#/b", "/0/", "target"); // #/a/b/0/target

For further details check pointer README

query

var query = require("json-library").query;
// call on each match of the query's matches
query.run(data,
	"#/pointer/{regex.*}/**/*?property:hasValue||property:otherValue",
	function (value, key, parentObject, jsonPointer) {
	});
// return all json pointers of query matches
var matches = query.run(data,
	"#/pointer/{^regex.*}/**/*?property:hasValue||property:otherValue",
	query.get.POINTER
);

For further details and query.get and query.delete check query README.

relationship

A json relationship defines 1:1, 1:n or n:n relationships between models (json values). This utility will work non-destructibly on objects or may export transformed relation data. This is very useful for building different relationships based on a single flat hierarchy (normalized data). Furthermore, relationships are useful for transforming data. Some Details can be found in relation README