jellyfin/Emby.Server.Implementations/Data/TypeMapper.cs

47 lines
1.4 KiB
C#

using System;
using System.Collections.Concurrent;
using System.Linq;
namespace Emby.Server.Implementations.Data
{
/// <summary>
/// Class TypeMapper.
/// </summary>
public class TypeMapper
{
/// <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?>();
/// <summary>
/// Gets the type.
/// </summary>
/// <param name="typeName">Name of the type.</param>
/// <returns>Type.</returns>
/// <exception cref="ArgumentNullException"><c>typeName</c> is null.</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 AppDomain.CurrentDomain.GetAssemblies()
.Select(a => a.GetType(typeName))
.FirstOrDefault(t => t != null);
}
}
}