how do call a polymorphic function from an agnostic function?
- by sds
I have a method foo
void foo (String x) { ... }
void foo (Integer x) { ... }
and I want to call it from a method which does not care about the argument:
void bar (Iterable i) {
...
for (Object x : i) foo(x); // this is the only time i is used
...
}
the code above complains that that foo(Object) is not defined and when I add
void foo (Object x) { throw new Exception; }
then bar(Iterable<String>) calls that instead of foo(String) and throws the exception.
How do I avoid having two textually identical definitions of bar(Iterable<String>) and bar(Iterable<Integer>)?
I thought I would be able to get away with something like
<T> void bar (Iterable<T> i) {
...
for (T x : i) foo(x); // this is the only time i is used
...
}
but then I get cannot find foo(T) error.
