dimanche 29 octobre 2017

Kotlin - Is here a smart way to throw NotImplementedError for all the methods of a class?

I need to implement an interface (ResultSet) having hundreds of methods. For now, I'm going to implement only a subset of these methods, throwing a NotImplementedError for the others.

In Java I found two solutions:

  1. Create an abstract class AbstractResultSet implementing ResultSet, declaring all methods to throw NotImplementedError. No hacks, but a lot of boilerplate code.
  2. Use Proxy.newProxyInstance to implement all methods together in the InvocationHandler. Less code but also less immediate to use for other coders.

Is there a third option in Kotlin?

In my case, I need to implement a a ResultSet over an IBM dataset (with packed decimals, binary fields, zoned numbers, rows with variable length, etc.) to import it in a SQLServer via SQLServerBulkCopy. I don't know which ResultSet methods are called by this class, so, for now, I'm going to implement only the "most used" methods, logging the calls to unimplemented method.





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