62 lines
2.3 KiB
C#
62 lines
2.3 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.Configuration;
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using System.Linq;
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using System.Text;
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using Umbraco.Core.Configuration;
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namespace Umbraco.Core.IO
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{
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internal class FileSystemProviderManager
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{
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private readonly FileSystemProvidersSection _config;
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#region Singleton
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private static readonly FileSystemProviderManager Instance = new FileSystemProviderManager();
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public static FileSystemProviderManager Current
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{
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get { return Instance; }
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}
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#endregion
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#region Constructors
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public FileSystemProviderManager()
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{
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_config = (FileSystemProvidersSection)ConfigurationManager.GetSection("FileSystemProviders");
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}
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#endregion
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public IFileSystem GetFileSystemProvider(string alias)
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{
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var providerConfig = _config.Providers[alias];
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if(providerConfig == null)
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throw new ArgumentException(string.Format("No provider found with the alias '{0}'", alias));
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var providerType = Type.GetType(providerConfig.Type);
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if(providerType == null)
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throw new InvalidOperationException(string.Format("Could not find type '{0}'", providerConfig.Type));
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if (providerType.IsAssignableFrom(typeof(IFileSystem)))
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throw new InvalidOperationException(string.Format("The type '{0}' does not implement IFileSystem", providerConfig.Type));
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var paramCount = providerConfig.Parameters != null ? providerConfig.Parameters.Count : 0;
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var constructor = providerType.GetConstructors()
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.SingleOrDefault(x => x.GetParameters().Count() == paramCount
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&& x.GetParameters().All(y => providerConfig.Parameters.AllKeys.Contains(y.Name)));
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if(constructor == null)
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throw new InvalidOperationException(string.Format("Could not find constructor for type '{0}' which accepts {1} parameters", providerConfig.Type, paramCount));
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var parameters = new object[paramCount];
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for(var i = 0; i < paramCount; i++)
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parameters[i] = providerConfig.Parameters[providerConfig.Parameters.AllKeys[i]].Value;
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return (IFileSystem) constructor.Invoke(parameters);
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}
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}
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}
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