Synnefo » Pithos MS Client

#region

/* -----------------------------------------------------------------------

 * <copyright file="IoC.cs" company="GRNet">

 * 

 * Copyright 2011-2012 GRNET S.A. All rights reserved.

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#endregion

namespace Pithos.ShellExtensions

{

    using System;

    using System.ComponentModel.Composition;

    using System.ComponentModel.Composition.Hosting;

    using System.Diagnostics;

    using System.Reflection;

    /// <summary>

    /// The IoC class initializes MEF DI and acts as a service locator.

    /// A singleton instance of IoC is provided by Instance

    /// </summary>

    public class IoC

    {

        private static readonly log4net.ILog Log = log4net.LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);

        /// <summary>

        /// The MEF Container

        /// </summary>

        public CompositionContainer Container;

        /// <summary>

        /// Layily initialized singleton instance of IoC

        /// </summary>

        static readonly Lazy<IoC> Instance=new Lazy<IoC>();

        /// <summary>

        /// Gets the singleton instance of IoC

        /// </summary>

        public static IoC Current

        {

            get { return Instance.Value; }

        }

        /// <summary>

        /// Initializes a new instance of the IoC from types exported from the executing assembly

        /// </summary>

        public IoC()

        {

            var catalog = new AggregateCatalog();

            catalog.Catalogs.Add(new AssemblyCatalog(Assembly.GetExecutingAssembly()));            

            Container=new CompositionContainer(catalog);

        }

        /// <summary>

        /// Initializes all imported properties of the target object

        /// </summary>

        /// <typeparam name="T">Type of the target object</typeparam>

        /// <param name="target">The target object</param>

        /// <returns>The object with all imported properties initialized</returns>

        public T Compose<T>(T target)

        {

            try

            {

                Container.ComposeParts(target);

                return target;

            }

            catch (Exception exc)

            {

                Log.ErrorFormat("Composition Error: {0}",exc);

                throw;

            }

        }

    }

}