Line data    Source code

       1             : #region Copyright
       2             : // // -----------------------------------------------------------------------
       3             : // // <copyright company="Chinchilla Software Limited">
       4             : // //   Copyright Chinchilla Software Limited. All rights reserved.
       5             : // // </copyright>
       6             : // // -----------------------------------------------------------------------
       7             : #endregion
       8             : 
       9             : using System;
      10             : using System.Collections.Generic;
      11             : using System.Linq;
      12             : using Cqrs.Configuration;
      13             : using Ninject;
      14             : using Ninject.Modules;
      15             : using Ninject.Parameters;
      16             : using Ninject.Syntax;
      17             : 
      18             : namespace Cqrs.Ninject.Configuration
      19             : {
      20             :         /// <summary>
      21             :         /// Provides an ability to resolve instances of objects using Ninject
      22             :         /// </summary>
      23             :         public class NinjectDependencyResolver : DependencyResolver
      24           1 :         {
      25             :                 /// <summary>
      26             :                 /// The inner Ninject <see cref="IKernel"/> used by this instance.
      27             :                 /// </summary>
      28             :                 public IKernel Kernel { get; private set; }
      29             : 
      30             :                 /// <summary>
      31             :                 /// A collection of <see cref="INinjectModule"/> instances to load when we call <see cref="PrepareKernel"/>
      32             :                 /// </summary>
      33             :                 public static IList<INinjectModule> ModulesToLoad = new List<INinjectModule>();
      34             : 
      35             :                 /// <summary>
      36             :                 /// A user supplied <see cref="Func{TResult}"/> that will be called during <see cref="Start"/> to create and populate <see cref="DependencyResolver.Current"/>.
      37             :                 /// </summary>
      38             :                 public static Func<IKernel, NinjectDependencyResolver> DependencyResolverCreator { get; set; }
      39             : 
      40             :                 /// <summary>
      41             :                 /// Instantiates a new instance of <see cref="NinjectDependencyResolver"/>
      42             :                 /// </summary>
      43           1 :                 public NinjectDependencyResolver(IKernel kernel)
      44             :                 {
      45             :                         Kernel = kernel;
      46             :                         BindDependencyResolver();
      47             :                 }
      48             : 
      49             :                 /// <summary>
      50             :                 /// Checks if <see cref="IDependencyResolver"/> has already been registered and if not, registers this instance to it.
      51             :                 /// </summary>
      52           1 :                 protected virtual void BindDependencyResolver()
      53             :                 {
      54             :                         bool isDependencyResolverBound = Kernel.GetBindings(typeof(IDependencyResolver)).Any();
      55             :                         if (!isDependencyResolverBound)
      56             :                         {
      57             :                                 Kernel.Bind<IDependencyResolver>()
      58             :                                         .ToConstant(this)
      59             :                                         .InSingletonScope();
      60             :                         }
      61             :                 }
      62             : 
      63             :                 /// <summary>
      64             :                 /// Starts the <see cref="NinjectDependencyResolver"/>
      65             :                 /// </summary>
      66             :                 /// <remarks>
      67             :                 /// this exists to the static constructor can be triggered.
      68             :                 /// </remarks>
      69           1 :                 public static void Start(IKernel kernel = null, bool prepareProvidedKernel = false)
      70             :                 {
      71             :                         if (kernel == null)
      72             :                         {
      73             :                                 kernel = new StandardKernel();
      74             :                                 prepareProvidedKernel = true;
      75             :                         }
      76             : 
      77             :                         if (DependencyResolverCreator != null)
      78             :                                 Current = DependencyResolverCreator(kernel);
      79             :                         else
      80             :                                 Current = new NinjectDependencyResolver(kernel);
      81             : 
      82             :                         if (prepareProvidedKernel)
      83             :                                 PrepareKernel(kernel);
      84             :                 }
      85             : 
      86             :                 /// <summary>
      87             :                 /// Calls <see cref="IKernel.Load(IEnumerable{INinjectModule})"/> passing in <see cref="ModulesToLoad"/>
      88             :                 /// </summary>
      89             :                 /// <param name="kernel">The <see cref="IKernel"/> the <see cref="ModulesToLoad"/> will be loaded into.</param>
      90           1 :                 public static void PrepareKernel(IKernel kernel)
      91             :                 {
      92             :                         kernel.Load
      93             :                         (
      94             :                                 ModulesToLoad
      95             :                         );
      96             :                 }
      97             : 
      98             :                 /// <summary>
      99             :                 /// Resolves a single instance for the specified <typeparamref name="T"/>.
     100             :                 /// by calling <see cref="IResolutionRoot.Resolve"/>
     101             :                 /// </summary>
     102           1 :                 public override T Resolve<T>()
     103             :                 {
     104             :                         return (T)Resolve(typeof(T));
     105             :                 }
     106             : 
     107             :                 /// <summary>
     108             :                 /// Resolves a single instance for the specified <paramref name="type"/>.
     109             :                 /// by calling <see cref="IResolutionRoot.Resolve"/>
     110             :                 /// </summary>
     111           1 :                 public override object Resolve(Type type)
     112             :                 {
     113             :                         return Kernel.Resolve(Kernel.CreateRequest(type, null, new Parameter[0], true, true)).SingleOrDefault();
     114             :                 }
     115             :         }
     116             : }