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| | | DAO - question about | DAO - question about 2005-05-12 - By ashraf galal
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<html><div style='background-color:'><P>When the storage is not subject to
change (I think this is your case) from one implementation to another,
then you can implement it using the factory method why? to produce a number of
DAOs need by your application. </P>
<P>If your underlying storage is subject to change from one implementation to
another( I think this is not your case), you can implement it using the
Abstract factory pattern.</P>
<P>The Abstract Factory pattern can build on the use of factory method
implementation.</P>
<P>This is why they saidd that in the J2EE design pattern you mentioned. <
/P>
<P>I think you need to use Factory method or Abstract factory method.</P>
<P> </P>
<P> </P>
<P> </P>
<P><BR> </P><BR><BR><BR>
<DIV>Ashraf Galal <BR>(416)804-8359</DIV><BR><BR><BR>>From: Maya menon <
;maya_java@(protected)><BR>>Reply-To: An interest list for Sun Java Center
J2EE Pattern Catalog <J2EEPATTERNS-INTEREST@(protected)><BR>>To:
J2EEPATTERNS-INTEREST@(protected)<BR>>Subject: DAO - question about<BR>>
;Date: Thu, 12 May 2005 09:15:31 -0700<BR>><BR>>Hi,<BR>><BR>>I am
thinking about using DAO for our project for doing database calls and
transactions. While we implement this pattern , shall I need to use factory
pattern ?<BR>>I was reading in Core J2Ee patterns :<BR>><BR>>The DAO
pattern can be made highly flexible by adopting the Abstract Factory [GoF] and
the Factory Method [GoF] patterns.<BR>><BR>>Is this a true statement ?<BR
>>My datasource is Oracle and I will be having couple of DAO classes specific
to actions.<BR>><BR>>Please
advice,<BR>><BR>><BR>><BR>>-- ---- ---- ---- ---- ---- -----<BR>>
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