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From "Frank Meijer" <mei...@nortelnetworks.com>
Subject RE: [Digester] Newbie question
Date Mon, 28 Apr 2003 17:59:46 GMT
Thanks.

> -----Original Message-----
> From: Craig R. McClanahan [mailto:craigmcc@apache.org] 
> Sent: Monday, April 28, 2003 12:18 PM
> To: Jakarta Commons Users List
> Subject: Re: [Digester] Newbie question
> 
> 
> 
> 
> On Mon, 28 Apr 2003, Frank Meijer wrote:
> 
> > Date: Mon, 28 Apr 2003 11:20:39 -0400
> > From: Frank Meijer <meijer@nortelnetworks.com>
> > Reply-To: Jakarta Commons Users List 
> <commons-user@jakarta.apache.org>
> > To: Jakarta Commons Users List <commons-user@jakarta.apache.org>
> > Subject: [Digester] Newbie question
> >
> > How is Digester different from JAXB?  What would cause me to choose 
> > one over the other?
> >
> 
> Digester preceeded JAXB by a couple of years, and is somewhat
> narrower+different in scope.
> 
> * Digester focuses only on reading XML (and a common use case is
>   creating corresponding beans, but that's not the only one),
>   while JAXB offers bidirectional support (java->XML as well).
> 
> * Digester does not presuppose that you're going to process the
>   entire XML document -- you define matching rules to pull out
>   what you are interested in, and ignore the rest.  JAXB wants a
>   bean hierarchy to match the entire document.
> 
> * Digester can be used to pull data out of any well-formed
>   XML document, at the cost of having to create your own bean
>   classes; JAXB has limits but will auto-generate bean classes
>   for your.
> 
> * Digester leverages the underlying BeanUtils capabilities to
>   set bean properties via reflection.  As a result, for example,
>   it supports open-ended sets of attributes that can all be set
>   into the corresponding bean properties with SetPropertiesRule.
> 
> Digester was originally created for processing configuration 
> files like server.xml in Tomcat, and struts-config.xml in 
> Struts.  It's features and functionality are biased towards 
> what you need for that use case.  (Note that a companion 
> Commons package, betwixt, does some of the Java->XML stuff 
> you might want).
> 
> JAXB was originally created as a data binding solution that 
> can map between XML and Java objects in a general way, and 
> (most especially) in a bidirectional way.
> 
> Which one to use depends, of course, on your app requirements.
> 
> > Thanks,
> > ...Frank
> >
> 
> Craig
> 
> 
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