CODEWITHSUNDEEP
javagenerics
Aaron
Aaron

Reputation: 881

How do I declare the generic type of an instance dynamically in java

I am mocking an interface that doesn't use generics, but does take a Class type as an argument.

public Object query(Class c, Filter f)
{....}

Is there a way in my implementation to use c as the argument for a generic?

eg.

return new ArrayList<c>();

Obviously I could do a switch if I had a know set of values for c, but that is a very ugly hack that I don't want to do.

Thanks.

Upvotes: 5

Views: 1208

Answers (1)

Yishai
Yishai

Reputation: 91871

You need a helper method:

 private <T> List<T> createList(Class<T> klass) {
          return new ArrayList<T>();
 }

Upvotes: 5

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