Comments on: Any tips for writing mapping code?

By: Chris Johnston

Chris Johnston — Sat, 12 Jan 2008 04:50:29 +0000

@Torbjörn - That would work, except we control no targets and are still using Java 1.4 so annotations are out (at least native Java ones) and the client is a long way away from letting us an annotations library.

@Alexei & @Carfield - Thanks for the recommendations, I will have to check them out.

The biggest problem with this mapping exercise is that we do not control any of the target domain models and one model uses all its own custom base object types (e.g., String, Decimal, Date, etc). Why any company would do this is beyond me.

By: Christian Schenk

Christian Schenk — Fri, 11 Jan 2008 14:36:38 +0000

Thanks Yim, but I haven’t really discussed the libraries in detail, I’ve just looked at their performance.

Anyway, I wrote some test code that might help you to try some things out; you can downlaod the Eclipse project as well.

Cheers,
Christian

By: Carfield Yim

Carfield Yim — Thu, 10 Jan 2008 14:55:21 +0000

Other than dozer, there are few libraries discussed at http://www.christianschenk.org/blog/java-bean-mapper-performance-tests/

By: Torbjörn Gyllebring

Torbjörn Gyllebring — Thu, 10 Jan 2008 12:34:15 +0000

For the target you control, if any, you could probably use annotations to indicate what member to call to get the value I’ve done similar stuff in C# using attributes and it usually turns out quite elegant.

By: Alexei Guevara

Alexei Guevara — Thu, 10 Jan 2008 06:34:44 +0000

There is a Java Bean Mapping framework named Dozer, which has a fairly rich feature set. See the post about it in the TheServerSide. I haven’t used it personally, but it definitely looks very promising.