[Yanel-development] Some questions on bug 4985 (Implement chainof responsibility)

Paloma Gomez paloma.gomez at wyona.com
Wed Nov 22 12:43:17 CET 2006


> Hi Paloma,
>
> We had a discussion about spring and we decided that we want to use it.
> I think we could use spring also for the MapFactoryImpl issue. We could
> specify the implementation class of the MapFactory in the spring xml
> configuration file.
>
> To me it looks like a better solution than the xerces approach.
> Or what do you think?

It's fine by me.
>
> Maybe you can have a look at the spring tutorial at
> http://www.springframework.org/docs/MVC-step-by-step/Spring-MVC-step-by-step.html

OK

> This afternoon I will to try to add basic spring configuration for the
> RepositoryFactory.
>
> josias
>
>
> On Wed, 2006-11-22 at 12:09 +0100, Paloma Gomez wrote:
>> > Paloma Gomez wrote:
>> >
>> >>Dear Michael,
>> >>
>>
>> >>However, this has nothing to do with some of the notes you wrote
>> >> yesterday
>> >>in the IRC, which makes me think that I might not have understood what
>> >> you
>> >>tried to explain. There were references to MANIFEST files
>> >>
>> >
>> > Currently the MapFactoryImpl is hardcoded within MapFactory and should
>> > actually
>> > be retrieved through a MANIFEST or something like this similar to
>> Xerces
>> > is being loaded
>> > dynamically and not hardcoded withi xml-apis
>>
>> I have had a look at the way classes are loaded in Xerces. Xerces
>> provides
>> an implementation of javax.xml.parsers.SAXParserFactory in
>> org.apache.xerces.jaxp.SAXParserFactoryImpl. In order to allow the
>> dynamic
>> loading of the class, javax.xml.parsers.SAXParserFactory#newInstance()
>> invokes
>>
>> [code]
>> return (SAXParserFactory) FactoryFinder.find(
>>                 /* The default property name according to the JAXP spec
>> */
>>                 "javax.xml.parsers.SAXParserFactory",
>>                 /* The fallback implementation class name */
>>                 "org.apache.crimson.jaxp.SAXParserFactoryImpl");
>> [/code]
>>
>> javax.xml.parsers.FactoryFinder.java is a package private class that
>> contains methods to find the appropriate class loader, find the
>> implementation of an abstract class or interface and create an instance
>> of
>> the implementing class. This class is also used by
>> javax.xml.parsers.DocumentBuilderFactory and is duplicated for each JAXP
>> subpackage.
>>
>> I would like to know if I should implement a similar class or I should
>> include the code in MapFactory.java. I guess that it is better to keep
>> things separated, isn't it?
>>
>> Thanks,
>>
>> Paloma
>>
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>>
>
>
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