liteinjector

A lightweight IoC container inspired by Martin Fowler's article on Inversion of Control Containers and the Dependency Injection pattern. http://martinfowler.com/articles/injection.html

###Get it here https://raw.githubusercontent.com/kat3samsin/liteinjector/master/liteinjector.js

#Getting Started

###Setup

Create an abstract class.

function AbstractDataSource() {
}

AbstractDataSource.prototype.getData = function() {
};

Create different concrete implementations.

function SqlDataSource() {}
SqlDataSource.prototype = Object.create(AbstractDataSource.prototype);
SqlDataSource.prototype.getData = function() { 
    return 'SqlDataSource'; 
}

function AnotherDataSource() {}
AnotherDataSource.prototype = Object.create(AbstractDataSource.prototype);
AnotherDataSource.prototype.getData = function() { 
    return 'AnotherDataSource'; 
}

Create a controller.

function DataSourceController(ds) {
    this.ds = ds;
}

DataSourceController.prototype.getData = function() {
    return this.ds.getData();
};

###Putting it all together

Add a dependency. Use controller argument as the first parameter. (key)

liteinjector.addDependency('ds', new SqlDataSource());

Get object with the injected dependency.

var ds = liteinjector.get(DataSourceController);
ds.getData(); //SqlDataSource

Add a new dependency.

liteinjector.addDependency('ds', new AnotherDataSource());
var ds = liteinjector.get(DataSourceController);
ds.getData(); //AnotherDataSource

Get full sample source here: https://raw.githubusercontent.com/kat3samsin/liteinjector/master/sample.js