[ http://issues.apache.org/jira/browse/IBATIS-50?page=comments#action_12414919 ]
Nils Winkler commented on IBATIS-50: ------------------------------------ Jeff, I like your idea, sounds like a plan. Don't know if there's any need for passing on the statement id to the factory. I don't think I would need it. On the other hand, it might be helpful for debugging or logging purposes. One more question: Are there any side effects on lazy loading? Or is this handled at some other place? > Ability to override the default bean creation mechanism > ------------------------------------------------------- > > Key: IBATIS-50 > URL: http://issues.apache.org/jira/browse/IBATIS-50 > Project: iBatis for Java > Type: Wish > Components: SQL Maps > Versions: 2.0.9 > Reporter: Philippe Laflamme > Assignee: Jeff Butler > > Currently, iBatis is responsible for creating instances of classes used in > result maps. It relies on the assumption that objects can be obtained using > the Class.newInstance() method (or something equivalent). > The assumption forces users of the framework to create classes with a no-arg > default constructor. IMHO, this also has the effect of favoring > implementation inheritance (extends) over interface inheritance. > Although this is not a problem in most cases, the ability to plug in an > external instance factory would provide more flexibility and favor good > programming practices. Amongst other things, it would provide developers the > ability write code in terms of interface. > A simple solution is to provide an extension point where resultMap class > instances are obtained from. > The simplest form would be: > public interface InstanceFactory { > Object createInstance(Class resultMapClass); > } > The default implementation would do something along the lines of: > [...] > return resultMapClass.newInstance(); > [...] > Developers could configure iBatis to either use the default implementation or > their own custom implementation. The setting could be part of the > sqlMapConfig file or even per resultMap. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://issues.apache.org/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira
