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Re: [patterns-discussion] Data Access pattern

From: Philipp Bachmann <bachlipp AT gmail.com>
To: Jevon Wright <j.m.wright AT massey.ac.nz>
Cc: patterns-discussion AT cs.uiuc.edu
Subject: Re: [patterns-discussion] Data Access pattern
Date: Tue, 23 Nov 2010 17:51:19 +0100
List-archive: <http://lists.cs.uiuc.edu/pipermail/patterns-discussion>
List-id: General talk about software patterns <patterns-discussion.cs.uiuc.edu>

Hello Jevon,

> The Iterator must also be closable, so that it can clean up
> references, close database connections etc. Jena has a similar
> interface ClosableIterator.

I am not sure I really got what you mean here. But anyway: I ran into
situations where I decided to go for Visitors (GoF) instead of
Iterators precisely because once DataStructure (or, in your case,
DataSource< T >) issued an Iterator, it does not have much control
over it, whereas the "access()" method accepting a Visitor can control
traversal.

Cheers,
Philipp

[patterns-discussion] Data Access pattern, Jevon Wright, 11/22/2010
- Re: [patterns-discussion] Data Access pattern, Ralph Johnson, 11/22/2010
- Re: [patterns-discussion] Data Access pattern, Philipp Bachmann, 11/23/2010