[Newbies] Design with Visitor
ducasse at iam.unibe.ch
Sun May 28 10:12:23 UTC 2006
Pay attention mathieu.
Design patterns can be evil too.
You do not really need a Visitor for your application.
Your performance classes are your domain and your seaside components
your UI pointing to
the domain objects.
Why do you need a PerfomanceCollection class?
Why do you want to keep in your dictionary the class of its objects?
See you monday :)
On 25 mai 06, at 16:22, math wrote:
>> Subject: Design with Visitor
>> From: "Mathieu SUEN" <mathk.sue at gmail.com>
>> Date: Wed, 24 May 2006 23:14:58 +0200
>> To: beginners-bounces at lists.squeakfoundation.org
>> Hi squeakers,
>> I have to build a lite code for home work.
>> The objective is to gave to user a possibility to store his sport
>> So I have design a Class Performance(with PerformanceCollection)
>> and I
>> wanted to let things like TimeLaps, Date, Distance, and so on.
>> for a later implementation (if we wanted to add others).
>> So I provide a Measure abstract class.
>> Hence I add a dictionary in my Performance with the class for key and
>> the instance for value:
>> for example:
>> Performance>>addMeasure: aMeasure
>> dictionaryOfMesure at: aMeasure class put: aMeasure
>> Now I have to bring them in a Seaside UI so I guess that Visitor
>> ( ;-) ) can help me but my complex structure mess my brain.
>> So I ask you if you think that can be possible(and how) or other
>> can be more suitable for this problem.
>> Thank you for your attention (:
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>> Beginners at lists.squeakfoundation.org
> Thinking forward I see that 2 Performance instance couldn't be compare
> so befor asking how to print them I will think about a other
> I think I will use Builder or Factory Method pattern.
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