My Personal Commander Variant

// This file is part of the Lobster.FolderBrowser library
// Copyright: Andreas Raczek
// This file is published under the The Code Project Open License (CPOL) 
// See the file "CPOL.html" for the full license governing this code.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ComponentModel.Composition.Hosting;
using System.ComponentModel.Composition;
using Lobster.Components;

namespace Lobster.FolderBrowser
{
    internal class PathModelSelector
    {
        private EntityFrameworkComposer<IPathModelCreator> efc; 

        public PathModelSelector()
        {
            efc = new EntityFrameworkComposer<IPathModelCreator>(this.GetType().Assembly);
        }

        public IPathModelCreator SelectCreatorForNav(string offsetPath, string path, ICollection<IPathModelConfiguration> confs)
        {
            foreach (var c in efc.Prototypes)
            {
                IPathModelCreator pmc = (IPathModelCreator) c.Clone();
                if (pmc.CanNavigate(offsetPath, path))
                {
                    pmc.Configuration = FindConfiguration(confs, pmc.GetType());
                    return pmc;
                }
            }
            return null;
        }

        public IPathModelCreator SelectCreatorForNavUp(string offsetPath, ICollection<IPathModelConfiguration> confs)
        {
            foreach (var c in efc.Prototypes)
            {
                IPathModelCreator pmc = (IPathModelCreator)c.Clone();
                if (pmc.CanNavigateUp(offsetPath))
                {
                    pmc.Configuration = FindConfiguration(confs, pmc.GetType());
                    return pmc;
                }
            }
            return null;
        }

        private IPathModelConfiguration FindConfiguration(ICollection<IPathModelConfiguration> confs, Type targetType)
        {
            if (null == confs) return null;

            foreach (var c in confs)
            {
                if (c.CreatorType == targetType) return c;
            }

            return null;
        }
    }
}