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@bentayloruk bentayloruk/Program.cs
Last active Dec 28, 2015

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//install-package Autofac.
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using Autofac;
namespace Funcofac
{
class Program
{
/// <summary>
/// Class A does something awesome with some injected functions.
/// </summary>
class A
{
readonly IEnumerable<Func<int, string>> _someFuncsYo;
public A(IEnumerable<Func<int,string>> someFuncsYo)
{
if (someFuncsYo == null) throw new ArgumentNullException("someFuncsYo");
_someFuncsYo = someFuncsYo;
}
public string DoIntStringMadness(int i)
{
//This is not xPlat ;)
return "Funcs out:\n" + String.Join("\n", _someFuncsYo.Select(f => f(i)));
}
}
/// <summary>
/// Class B has some useful instance and static methods.
/// </summary>
class B
{
readonly int _i;
public B(int i)
{
_i = i;
}
public string AwesomeInstanceMethod(int i)
{
return i.ToString(CultureInfo.InvariantCulture) + _i;
}
public static string AwesomeStaticMethod(int i)
{
return i.ToString(CultureInfo.InvariantCulture) + " I'm like totally static.";
}
}
//Let's get down to work!
static void Main(string[] args)
{
//Build my container.
var container = BuildContainer();
//Resolve the composition root.
var a = container.Resolve<A>();
//Did something awesome without interfaces.
var intStringMadness = a.DoIntStringMadness(2013);
//Funcs out:
//2013 I'm like totally static.
//201352
//201342
}
static IContainer BuildContainer()
{
var containerBuilder = new ContainerBuilder();
containerBuilder.Register(c => (Func<int, string>) (i => new B(42).AwesomeInstanceMethod(i)));
containerBuilder.Register(c => (Func<int, string>)(i => new B(52).AwesomeInstanceMethod(i)));
containerBuilder.Register<Func<int, string>>(c => B.AwesomeStaticMethod);
containerBuilder.RegisterType<A>();
return containerBuilder.Build();
}
}
}
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