/// <summary>
/// Attempts to find an extension method that matches the name and arguments based on scanning the Type's passed in
/// to the findMethodsOnTypes parameter
/// </summary>
/// <param name="thisObject">The instance object to execute the extension method for</param>
/// <param name="args"></param>
/// <param name="name"></param>
/// <param name="findMethodsOnTypes"></param>
/// <returns></returns>
internal static object FindAndExecuteExtensionMethod <T>(T thisObject,
object[] args,
string name,
IEnumerable <Type> findMethodsOnTypes)
{
object result = null;
//find known extension methods that match the first type in the list
MethodInfo toExecute = null;
foreach (var t in findMethodsOnTypes)
{
toExecute = ExtensionMethodFinder.FindExtensionMethod(t, args, name, false);
if (toExecute != null)
{
break;
}
}
if (toExecute != null)
{
var genericArgs = (new[] { (object)thisObject }).Concat(args);
result = toExecute.Invoke(null, genericArgs.ToArray());
}
else
{
throw new MissingMethodException();
}
return(result);
}
/// <summary>
/// Attempts to find an extension method that matches the name and arguments based on scanning the Type's passed in
/// to the findMethodsOnTypes parameter
/// </summary>
/// <param name="runtimeCache"></param>
/// <param name="thisObject">The instance object to execute the extension method for</param>
/// <param name="args"></param>
/// <param name="name"></param>
/// <param name="findMethodsOnTypes"></param>
/// <returns></returns>
internal static object FindAndExecuteExtensionMethod <T>(
IRuntimeCacheProvider runtimeCache,
T thisObject,
object[] args,
string name,
IEnumerable <Type> findMethodsOnTypes)
{
object result = null;
//find known extension methods that match the first type in the list
MethodInfo toExecute = null;
foreach (var t in findMethodsOnTypes)
{
toExecute = ExtensionMethodFinder.FindExtensionMethod(runtimeCache, t, args, name, false);
if (toExecute != null)
{
break;
}
}
if (toExecute != null)
{
var genericArgs = (new[] { (object)thisObject }).Concat(args);
// else we'd get an exception w/ message "Late bound operations cannot
// be performed on types or methods for which ContainsGenericParameters is true."
// because MakeGenericMethod must be used to obtain an actual method that can run
if (toExecute.ContainsGenericParameters)
{
throw new InvalidOperationException("Method contains generic parameters, something's wrong.");
}
result = toExecute.Invoke(null, genericArgs.ToArray());
}
else
{
throw new MissingMethodException(typeof(T).FullName, name);
}
return(result);
}
