public class FooFactory {

    public static FooFactory instance = new FooFactory();
    private java.util.HashMap<Class, Foo> list;

    private FooFactory() {
        list = new java.util.HashMap<Class, Foo>();
    }

    public static FooFactory getInstance() {
        return instance;
    }

    public Foo getFoo(java.lang.Class cls) {

        if (!list.containsKey(cls)) {
            list.put(cls, new Foo<cls>());
        }

        return list.get(cls);
    }
}

class Foo<T> {
}