jellyfin/Emby.Server.Implementations/Data/TypeMapper.cs
2019-01-13 20:54:44 +01:00

55 lines
1.6 KiB
C#

using System;
using System.Collections.Concurrent;
using System.Linq;
using MediaBrowser.Model.Reflection;
namespace Emby.Server.Implementations.Data
{
/// <summary>
/// Class TypeMapper
/// </summary>
public class TypeMapper
{
private readonly IAssemblyInfo _assemblyInfo;
/// <summary>
/// This holds all the types in the running assemblies so that we can de-serialize properly when we don't have strong types
/// </summary>
private readonly ConcurrentDictionary<string, Type> _typeMap = new ConcurrentDictionary<string, Type>();
public TypeMapper(IAssemblyInfo assemblyInfo)
{
_assemblyInfo = assemblyInfo;
}
/// <summary>
/// Gets the type.
/// </summary>
/// <param name="typeName">Name of the type.</param>
/// <returns>Type.</returns>
/// <exception cref="System.ArgumentNullException"></exception>
public Type GetType(string typeName)
{
if (string.IsNullOrEmpty(typeName))
{
throw new ArgumentNullException(nameof(typeName));
}
return _typeMap.GetOrAdd(typeName, LookupType);
}
/// <summary>
/// Lookups the type.
/// </summary>
/// <param name="typeName">Name of the type.</param>
/// <returns>Type.</returns>
private Type LookupType(string typeName)
{
return _assemblyInfo
.GetCurrentAssemblies()
.Select(a => a.GetType(typeName))
.FirstOrDefault(t => t != null);
}
}
}