Question

Let’s say I have:

public class Components<T> extends TupleList<Class<T>, String> {

    private static final long serialVersionUID = 1L;

    public void add(Class<T> classe, String name) {
        this.add(new Tuple<Class<T>, String>(classe, name));
    }
}

I’d like to be able to do the following:

Components<IFilter> engines=new Components<IFilter>(){{
   add(FilterEngineIdentity.class, "Identity");
}};

where FilterEngineIdentity implements IFilter. How would I achieve this without binding my class Components to more specific class definitions?

Answer 1

Edit: It works! See my test added on the bottom.

Would the following work?

Class<? extends T>

Whole class:

public class Components<T> extends TupleList<Class<?extends T>, String> {

    private static final long serialVersionUID = 1L;

    public void add(Class<? extends T> classe, String name) {
        this.add(new Tuple<Class<? extends T>, String>(classe, name));
    }
}

The test (compiles without problems on my machine, Java 1.7 but I didn’t use the <> so it should work fine with other versions):

public interface Interface {}

public class Test<T>
{
public void add(Class<? extends T> x)
{

}

public static void x()
{
    Test<Interface> t = new Test<Interface>();
    t.add(Implementation.class);
}

public static class Implementation implements Interface{}
}