创建一个泛型类型的实例，它接受一个次要泛型类型的参数

Question

I have an abstract class called Factory

The factory has a method createModel()

public abstract class Factory<T, U>{

    public T CreateModel(IDictionary<String, Object> parametersDictionary)
        {
            T toReturn;

            if (ValidateDictionary(parametersDictionary) != true)
                 return null;
            else
            {
                 toReturn = new T(U);
            }


            return toReturn;
        }}

In the else statement, I want to create a Car instance taking a CarPart object which I would get from another method call. This logic would be applied on other Factory subtypes so I want to inherit this method. The issue is I can't create the Car generic instance with another Generic parameter.

I looked around and found that I could use the Activator class.

(T)Activator.CreateInstance(typeof( Car), args);

This however seems to work only when you have a certain type that you want to give to the constructor.

I also tried to do:

public abstract class Factory where T: new()

But that didn't let me parse any argument to the constructor.

How can I implement this abstract class?

Edit1: changed the naming for clarification

Edit2: For clarification, U is a structure that contains aproximatelly 20 parameters necessary for creating T. So in order to create a new T, I need to pass it a U object that encapsulates all 20 parameters necessary.

Answer 1

After Abion47 pointed out that Activator.CreateInstance shouldn't have any issues doing what I need it to do I looked a bit more into the issue and made it work.

For anyone that might come across this:

public abstract class Sentinel<T,U> where T: new() where U: new() 
{
    public T CreateModel(IDictionary<String, Object> parametersDictionary)
    {
        T toReturn ;

        if (ValidateDictionary(parametersDictionary) != true)
            return default(T);
        else
        {
            U parameters = ParseDictionaryToParameters(parametersDictionary);
            toReturn = (T)Activator.CreateInstance(typeof(T), new object[] {parameters});
        }

        //If we got this far then everything should be fine.
        return toReturn;
    }

    public abstract U ParseDictionaryToParameters(IDictionary<String, Object> parametersDictionary);

    public abstract Boolean ValidateDictionary(IDictionary<String, Object> parametersDictionary);
}