CrossBrightnessService.shared.cs

using System;

namespace Plugin.BrightnessService
{
	/// <summary>
	/// Cross BrightnessService
	/// </summary>
	public static class CrossBrightnessService
	{
		static Lazy<IBrightnessService> implementation = new Lazy<IBrightnessService>(() => CreateBrightnessService(), System.Threading.LazyThreadSafetyMode.PublicationOnly);

		/// <summary>
		/// Gets if the plugin is supported on the current platform.
		/// </summary>
		public static bool IsSupported => implementation.Value == null ? false : true;

		/// <summary>
		/// Current plugin implementation to use
		/// </summary>
		public static IBrightnessService Current
		{
			get
			{
				IBrightnessService ret = implementation.Value;
				if (ret == null)
				{
					throw NotImplementedInReferenceAssembly();
				}
				return ret;
			}
		}

		static IBrightnessService CreateBrightnessService()
		{
#if NETSTANDARD1_0 || NETSTANDARD2_0
			return null;
#else
#pragma warning disable IDE0022 // Use expression body for methods
            return new BrightnessServiceImplementation();
#pragma warning restore IDE0022 // Use expression body for methods
#endif
		}

		internal static Exception NotImplementedInReferenceAssembly() =>
			new NotImplementedException("This functionality is not implemented in the portable version of this assembly.  You should reference the NuGet package from your main application project in order to reference the platform-specific implementation.");

	}
}