Switching from C# to Java

Re:Switching from C# to Java by thejake on Tuesday April 13, 2010 @08:05AM (#1261679)

The case that I've bumped up against several times is when trying to get the class of the generic object. Something like:

  T obj;
  obj = getObjFromSomewhere();
  log(T.class);

This type of operation is most useful if writing framework type of some sort. I've come across it when trying to write a generic JPA base DAO type of class.

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Re:Switching from C# to Java by rit on Tuesday April 13, 2010 @11:56AM (#1262371)

Scala has Manifests to emulate reified types for just this reason.

http://www.scala-blogs.org/2008/10/manifests-reified-types.h...

It's improved a bit in 2.8 - in porting some code I discovered a nice little hack that lets you declare your variance like this:

[A <: SomeBaseClass <: Manifest]

Which tells the compiler in an oh so gentle manner to reify for you.

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