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From "Simone Tripodi (JIRA)" <>
Subject [jira] Commented: (DIGESTER-135) Digester rules defined through Java5 Annotatations
Date Wed, 21 Oct 2009 15:26:59 GMT


Simone Tripodi commented on DIGESTER-135:

Of course this approach has his known[1] limitations and works for a Digester subset application
cases, btw should/could (IMHO) simplify, even if a little, the RuleSet startup.

Just to let you know: I started developing it because I was getting "bored" of instantiating
manually all Digester rules, checking XML patterns first, then checking bean fields, then
writing the rules... and since I was parsing a customer client web service response that,
in developing time, was changing format frequently, I was looking for something that could
generate for me automatically all Digester rules needed reducing the risk to have "out-of-sync"
the XML response with my business object... does it justify, in this scenario, the presence
of such "tool"?

This also to explain that I didn't choice to just add a new feature to an already well known
component, but rather to share a tool that, at least for me, was helpful and alleviated my
daily work ... 

Can you provide please an example of builder-like API you mentioned? Do you mean (in pseudocode)
something like

Digester digester = new DigesterBuilder()
                                .addObjectCreate("my", MyCustomObject.class)
                                .addRule("my/pattern", new UserCustomRule())

Btw, we could work together on it if you've the pleasere, just let me know!


> Digester rules defined through Java5 Annotatations
> --------------------------------------------------
>                 Key: DIGESTER-135
>                 URL:
>             Project: Commons Digester
>          Issue Type: Improvement
>    Affects Versions: 2.1
>            Reporter: Simone Tripodi
>            Priority: Minor
>             Fix For: 2.1
>         Attachments: DigesterAnnotations.patch
> Taking inspiration by Google-Guice, JAXB and JPA's annotations, the existing package
can be extended adding some facilities to configure the commons-digester using the Java language
metadata annotations.

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