video 1.0 Vimeo http://vimeo.com/ Ekkehard Gentz http://vimeo.com/ekkescorner 1 <object width="1280" height="720"><param name="allowfullscreen" value="true" /><param name="allowscriptaccess" value="always" /><param name="movie" value="http://vimeo.com/moogaloop.swf?clip_id=4558181&server=vimeo.com&show_title=1&show_byline=1&show_portrait=1&color=00ADEF&fullscreen=1" /><embed src="http://vimeo.com/moogaloop.swf?clip_id=4558181&server=vimeo.com&show_title=1&show_byline=1&show_portrait=1&color=00ADEF&fullscreen=1" type="application/x-shockwave-flash" allowfullscreen="true" allowscriptaccess="always" width="1280" height="720"></embed></object> 1280 720 1017 The Generation Gap Pattern (see also John Vlissides) is widely used to separate generated code from modifdied/extended code. But the Generation Gap Pattern isn't always aplicable - from my experiences it fails if you generate code into areas with partly complex inheritance hierarchies like Persistence Layer with Entity, Embeddable, EJB3 etc. Using a modern Generation Framework as oAW (openArchitectureWare) from Eclipse Modeling Tools Project you can implement a Veto Strategy in your workflow components to optimize file handling using Generation Gap Pattern. In this presentation I introduce a VetoRedirectStrategy to find ways without applying the Generation Gap Pattern. I tried to make a presentation partly in ZEN style and with easy-to-understand slides - so have fun. Additional Informations: http://ekkes-corner.org (blog in english) http://ekkes-ecke.org (blog in german) http://ekkes-corner-tv.org (video podcasts) iTunes (search for "ekkes-corner") @ekkescorner (twitter) references: (c) 1996 John Vlissides "Generation Gap Pattern" http://www.research.ibm.com/designpatterns/pubs/gg.html Article Heike Behrens "Generation Gap Pattern" http://www.1160pm.net/2009/04/23/generation-gap-pattern/ http://ts.vimeo.com.s3.amazonaws.com/115/770/11577017_200.jpg 200 150 4558181