Question

Suppose I want to convert a class into another using generics. can I do that?

for eg.

Class BConvertImpl implements Converter
{
  A toA(Class B);
  void update(Class A, Class B);
}

Class CConverterImpl implements Converter
{
  A toA(Class C);
  void update(Class A, Class C);
}

Can I use generics to implement this?

I am pretty new to Generics in Java. can somebody help me with this one?

Thanks

Answer 1

Yes: You need to type your Converter class (and name the method simply to):

/**
 * @param <F> The "from" type
 * @param <T> The "to" type
 */
interface Converter<F, T> {

  T to(F from);

  void update(T to, F from);
}

class BConvertImpl implements Converter<B, A> {

  A to(B from) { /* some impl */ }

  void update(A to, B from) { /* some impl */ }
}

class CConverterImpl implements Converter<C, A> {

  A to(C from) { /* some impl */ }

  void update(A to, C from) { /* some impl */ }
}