Querying/Operation on MonetaryAmount

MonetaryOperator and MonetaryQuery are functional interfaces. They provide abstraction for querying and operating on monetary values like conversions and retrieving the fractional parts (cents).

@FunctionalInterface
public interface MonetaryOperator{
  MonetaryAmount apply(MonetaryAmount amount);
}


@FunctionalInterface
public interface MonetaryQuery<R>{
  R queryFrom(MonetaryAmount amount);
}