Introduction to Composite WPF (CAL, Prism): Part 2

using System;
using System.Collections.Generic;
using System.Text;
using System.Reflection;
using System.IO;
using System.Windows;

using JamSoft.CALDemo.Modules.SkinManager.Core;

namespace JamSoft.CALDemo.Modules.SkinManager
{
    /// <summary>
    /// The class for use when loading skins from unreferenced dll libraries
    /// </summary>
	public class DirectAssemblySkin : Skin
	{
        /// <summary>
        /// 
        /// </summary>
        /// <param name="name"></param>
        /// <param name="assemblyPath"></param>
		public DirectAssemblySkin(string name, string description, string assemblyPath) : base (name,description)
		{
			if (string.IsNullOrEmpty(assemblyPath))
			{
				throw new ArgumentException("Invalid assembly path", "assemblyPath");
			}
			this._fullName = AssemblyName.GetAssemblyName(assemblyPath);
		}

        /// <summary>
        /// 
        /// </summary>
        /// <param name="name"></param>
        /// <param name="fullName"></param>
		public DirectAssemblySkin(string name, string description, AssemblyName fullName) : base (name, description)
		{
			if (fullName == null)
			{
				throw new ArgumentException("Invalid assembly name", "fullName");
			}
			this._fullName = fullName;
		}

        /// <summary>
        /// 
        /// </summary>
        /// <param name="name"></param>
        /// <param name="assemblyPath"></param>
        /// <param name="resourceName"></param>
		public DirectAssemblySkin(string name,string description, string assemblyPath, string resourceName) : base(name, description)
		{
			if (string.IsNullOrEmpty(resourceName))
			{
				throw new ArgumentException("Invalid resource name", "assemblyPath");
			}
			this._fullName		= AssemblyName.GetAssemblyName(assemblyPath);
			this._resourceName	= resourceName;
			FixResourceName();
		}		

        /// <summary>
        /// 
        /// </summary>
        /// <param name="name"></param>
        /// <param name="fullName"></param>
        /// <param name="resourceName"></param>
		public DirectAssemblySkin(string name, string description, AssemblyName fullName, string resourceName) : base(name, description)
		{
			if (string.IsNullOrEmpty(resourceName))
			{
				throw new ArgumentException("Invalid resource name", "assemblyPath");
			}
			this._fullName		= fullName;
			this._resourceName	= resourceName;
			FixResourceName();
		}

        /// <summary>
        /// 
        /// </summary>
		protected AssemblyName FullName
		{
			get { return _fullName; }
		}

        /// <summary>
        /// 
        /// </summary>
		protected sealed override void LoadResources()
		{
			ISkinBamlResolver skinResolver = PreLoadResources();
			try
			{
				List<Stream> skinBamlStreams = skinResolver.GetSkinBamlStreams(_fullName, _resourceName);
				foreach (Stream resourceStream in skinBamlStreams)
				{
					ResourceDictionary skinResource = BamlHelper.LoadBaml<ResourceDictionary>(resourceStream);
					if (skinResource != null)
					{
						Resources.Add(skinResource);
					}
				}
			}
			finally
			{
				PostLoadResources();
			}
		}

        /// <summary>
        /// 
        /// </summary>
        /// <returns></returns>
		protected virtual ISkinBamlResolver PreLoadResources() { return new SkinBamlResolver(); }
        /// <summary>
        /// 
        /// </summary>
		protected virtual void PostLoadResources() { }

		private void FixResourceName()
		{
			_resourceName = _resourceName.ToLower().Replace(".xaml", ".baml");
		}

		private readonly AssemblyName _fullName;
		private string _resourceName;		
	}
}