Re: FreeMarker 2.4 Preview 1 (unstable) is out

Daniel Dekany wrote:
> This is a preview release of the a yet unfinished FreeMarker 2.4, so
> it's for advanced users and experts who would like to give feedback.
> Don't use it in production environment!
> 
> Download: http://prdownloads.sourceforge.net/freemarker/freemarker-2.4pre1.tar.gz
> 
> What's new: http://freemarker.org/docs-24pre1/versions_2_4_pre1.html
> 
> All feedback is welcome!
> 

Well - quite an impressive new features set!

A few comments:

- [A general comment on version] Given the amount and scope of new 
features - not least the introduction of null and the JDK 1.5 
requirements - and the backward incompatibility perhaps a version 3.x
would be appropriate as a signal to the user.  Most people would expect 
a change from 2.3 to 2.4 to introduce new features that are backward 
compatible or perhaps just introduce some deprecation, but not be wholly 
backward incompatible.

- [Migration issue] As I use quite frequently Map key iteration (eg via 
Map.keySet()) I've hit upon this change:
"Warning, backward incompatible change! The default of simpleMapWrapper 
property of BeansWrapper is true now. This means that the methods and 
fields of Map-s will not be exposed by default, only the pure key-set 
will define the subvariables of the templates. Note that the default 
object wrapper of FreeMarker always had simpleMapWrapper set to true, so 
if you have used only the default object wrapper, then there is no 
change for you."

What is the rationale behind this?  And is the proposed solution - 
setting the object wrapper to simpleMapWrapper - compatible with the 
2.3.x beanWrapper?  If not, it would be real show-stopper!  Hence trying 
to understand the need for the change. To be specific, would this 
behaviour be configured via the "object_wrapper" param in the freemarker 
servlet by setting it "simple_map" or "map"?

Thanks and cheers!



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