static Dictionary <Type, MethodInfo> FindMatchingExtensionMethods <TAttribute>(Func <MethodInfo, bool> filterMethods, Func <MethodInfo, Type> keySelector) where TAttribute : Attribute
{
var factoryMethods = new Dictionary <Type, MethodInfo>();
var assemblies = AppDomain.CurrentDomain.GetAssemblies()
.Where(a => !a.FullName.StartsWith("Microsoft"));
var extensionMethods = TypeSystem.GetExtensionMethods <TAttribute>(assemblies);
Type extendedType = typeof(TExtendedType);
if (extensionMethods.TryGetValue(extendedType, out var allMethodInfos))
{
foreach (var methodInfo in allMethodInfos.Where(filterMethods))
{
var key = keySelector(methodInfo);
if (factoryMethods.TryGetValue(key, out var prevValue))
{
Debug.LogError($"Duplicate extension methods for type {key}, previous value: {prevValue}, new value: {methodInfo}, extended type: {extendedType.FullName}");
}
factoryMethods[key] = methodInfo;
}
}
return(factoryMethods);
}
static MethodInfo GetExtensionMethodOf(Type extendedType, Type targetType, Func <MethodInfo, bool> filterMethods, Func <MethodInfo, Type> keySelector)
{
if (targetType == typeof(ScriptableObject))
{
return(null);
}
if (s_FactoryMethods == null)
{
s_FactoryMethods = new Dictionary <Type, MethodInfo>();
var assemblies = AppDomain.CurrentDomain.GetAssemblies()
.Where(a => !a.FullName.StartsWith("Microsoft"));
var extensionMethods = TypeSystem.GetExtensionMethods(assemblies);
if (extensionMethods.TryGetValue(extendedType, out var allMethodInfos))
{
foreach (var methodInfo in allMethodInfos.Where(filterMethods))
{
var key = keySelector(methodInfo);
if (s_FactoryMethods.TryGetValue(key, out var prevValue))
{
Debug.LogError($"Duplicate extension methods for type {key}, previous value: {prevValue}, new value: {methodInfo}, extended type: {extendedType.FullName}");
}
s_FactoryMethods[key] = methodInfo;
}
}
}
if (s_FactoryMethods.ContainsKey(targetType))
{
return(s_FactoryMethods[targetType]);
}
MethodInfo extension = null;
foreach (var type in GetInterfaces(targetType, false))
{
extension = GetExtensionMethod(type, filterMethods, keySelector);
if (extension != null)
{
break;
}
}
if (extension == null && targetType.BaseType != null)
{
extension = GetExtensionMethod(targetType.BaseType, filterMethods, keySelector);
}
//Did we find a builder for one of our base class?
//If so, add it to the dictionary, this will optimize the next call
//for this type
if (extension != null)
{
s_FactoryMethods[targetType] = extension;
}
// else
// {
// if (extendedType.BaseType != null)
// return GetExtensionMethodOf(extendedType.BaseType, t, filterMethods, keySelector);
// }
return(extension);
}