experiments/csharp/E057-TypeRoulette/Program.cs

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2024-05-04 21:16:52 +01:00
using System.Reflection;
var random = new Random();
for (var i = 0; i < 10; i++)
{
object instance = NextType(random);
Console.WriteLine(instance.GetType());
Console.WriteLine($" {CallRandomMethod(random, instance)}");
}
return;
static object? CallRandomMethod(Random random, object o)
{
MethodInfo[] methods = o.GetType().GetMethods(BindingFlags.Public | BindingFlags.Instance).Where(m => m.GetParameters().Length == 0).ToArray();
if (methods.Length == 0) return null;
return methods[random.Next(methods.Length)].Invoke(o, null);
}
static object NextType(Random random)
{
Assembly[] assemblies = AppDomain.CurrentDomain.GetAssemblies();
if (assemblies.Length == 0) return new object();
Assembly assembly = assemblies[random.Next(assemblies.Length)];
Type[] types = assembly.GetTypes().Where(t => !t.ContainsGenericParameters && t.GetConstructors(BindingFlags.Public | BindingFlags.Instance).Count(c => c.GetParameters().Length == 0) == 1).ToArray();
if (types.Length == 0) return new object();
Type type = types[random.Next(types.Length)];
return Activator.CreateInstance(type)!;
}