ExtensionMethods.Reference.cs

Go to the documentation of this file.

using System;
using AnalyzeRe.Utilities;
 
// ReSharper disable once CheckNamespace (Extension methods work best on the root namespace)
namespace AnalyzeRe
{
    public static partial class ExtensionMethods
    {
        private static readonly Type _referenceGenericBaseType = typeof(Reference<>);
 
        public static IReference<T> ToReference<T>(this T obj, bool stronglyTyped = false) where T : IAPIResource
        {
            if (obj == null)
                throw new ArgumentNullException(nameof(obj),
                    "Attempted to call '.toReference()' on a null resource.");
            if (!stronglyTyped)
                return new Reference<T>(obj);
            // Make sure to get the run-time type of the object we are converting to a reference.
            Type runtimeType = obj.GetType();
            if (runtimeType == typeof(T))
                return new Reference<T>(obj);
            // Slower, but ensures the reference of the most specific type possible.
            // Use a cache to avoid having to make the corresponding generic type each time.
            Type runtime_reference_type = _referenceGenericBaseType.MakeGenericTypeFast(runtimeType);
            return (IReference<T>)Activator.CreateInstance(runtime_reference_type,
                                                           new object[] { obj });
        }
    }
}