I'm tempted to say "trust me, it's better". But I think it would be interesting for you to do some reading about it. This is the classic question regarding the Singleton design pattern.
Do a google query for "singleton vs static" and you'll get a lot of hits. Here's a good starting point: http://www.kamalmeet.com/wordpress/2006/06/22/singleton-vs-static-classes/ The main issues are: 1. Better control of creation 2. Easier to subclass These may, or may not, matter to you. Jeff Butler On Mon, Mar 3, 2008 at 2:12 PM, Pieter Baele <[EMAIL PROTECTED]> wrote: > What's the benefit of using this factory as a Singleton? > One of my co-students suggested making all methods static, > so you can use Factory.getXxxDAO() instead off > Factory.getInstance.getXxxDAO(); > but I'm not sure about that.... > > > Pieter Baele > [EMAIL PROTECTED] > > In Microsoft world, you are always one click away from harming yourself™ > - trustnoguy > > On 03 Mar 2008, at 14:55, Jeff Butler wrote: > > > The SVN version is very stable and has a few extra features (it now > > generates countByExample and updateByExample methods) , but the 1.0 > > version should be fine too. I think you could use either. > > > > Jeff Butler > > > > On Mon, Mar 3, 2008 at 2:02 AM, [EMAIL PROTECTED] < > [EMAIL PROTECTED] > > > wrote: > > Jeff, > > > > It helps a lot, I didn't knew abator also can generate a generic DAO. > > Is it recommended to use the svn version? > > > > Thx! > > Pieter > > > > > > > > >----- Oorspronkelijk bericht ----- > > >Van: Jeff Butler [mailto:[EMAIL PROTECTED] > > >Verzonden: maandag, maart 3, 2008 02:12 AM > > >Aan: user-java@ibatis.apache.org > > >Onderwerp: [SPAM] Re: iBATIS for swing application > > > > > >Here's a way to use the generic DAOs built by Abator (I think this > > is the > > >easiest way to do it if you're not using Spring): > > > > > >1. Use Abator to generate generic DAOs with the GENERIC-CI DAO > > generator > > >2. Write an SqlMapConfig.xml file listing all the SqlMap.xml files > > generated > > >by Abator (theres an example in the Abator documentation) > > >3. Write a Singleton factory for DAOs the DAOs: > > > > > >public class DAOFactory { > > > > > > private static DAOFactory instance = new DAOFactory(); > > > public static DAOFactory getInstance() { > > > return instance; > > > } > > > > > > private SqlMapClient sqlMap; > > > private MyDao myDao; > > > > > > private DAOFactory () { > > > String resource = "com/mycompany/SqlMapConfig.xml"; > > > Reader reader = Resources.getResourceAsReader(resource); > > > sqlMap = SqlMapClientBuilder.buildSqlMap(reader); > > > } > > > > > > public MyDao getMyDao() { > > > if (myDao == null) { > > > myDao = new MyDaoImpl(sqlMap); > > > } > > > return myDao; > > > } > > >} > > > > > >You can repeat the MyDao method for every DAO generated by Abator. > > > > > >3. Use this factory anywhere in your Swing app like this: > > > > > >MyDao myDao = DAOFactory.getInstance().getMyDao(); > > >myDao.insert(myObject); > > > > > >etc. > > > > > >Hope that helps - > > > > > >Jeff Butler > > > > > > > > > > > > > > > > > > > > >On Sun, Mar 2, 2008 at 1:09 PM, [EMAIL PROTECTED] < > > >[EMAIL PROTECTED]> wrote: > > > > > >> Hello, > > >> > > >> I am a student (college university) working on a part of a > > fictive project > > >> management software system. > > >> > > >> We received a database dll scheme, so Hibernate was not really an > > option. > > >> It's also a very short project (8 weeks) so iBATIS is definitely > > a better > > >> solution. > > >> (shorter learning curve) > > >> > > >> I've bought iBATIS in action and generated Java Beans and sqlmaps > > with > > >> abator. > > >> > > >> But now I am stuck. I need some sort of Factory/Facade/Controller > > for the > > >> sqlMaps, but how to code these? > > >> It's a desktop app, so isn't the (Spring) DAO overkill??? (I also > > don't > > >> have enough time...) > > >> Is it necessary to use a DAO? Is the iBATIS DAO out-of-date > > because it > > >> isn't under development anymore? > > >> > > >> I don't like the MVC solution we've seen in the Java lessons - > > manually > > >> writing a Connection class, and Mapper classes (Prepared and > > Callable > > >> statements) > > >> ...but I also don't really know how to fill in the gap between > > Swing > > >> (view) and the sqlmaps + beans... > > >> > > >> Any help is greatly appreciated. > > >> > > >> A desperate ;-) student > > >> Greeting, PieterB > > >> > > >> > > >> > > >> > > >> > > > > > > > > > > >
