Craig,
While we are on the subject of Digester let me ask you a question about
it...
I have been using Digester for the past few months & I am loving it. But
one of my friends is saying that I should consider switching to JDOM. What
are your thoughts?
My feeling is that JDOM must be more like DOM - which means I have to take
care of parsing on my own. Since Digester does that for me behind the scene,
why should I worry about JDOM? Is Digester going to use JDOM in the back?
Or does it already?
Thanks.
>-- Original Message --
>Reply-To: "Struts Users Mailing List" <[EMAIL PROTECTED]>
>Date: Tue, 30 Apr 2002 08:24:18 -0700 (PDT)
>From: "Craig R. McClanahan" <[EMAIL PROTECTED]>
>To: Struts Users Mailing List <[EMAIL PROTECTED]>,
> <[EMAIL PROTECTED]>
>Subject: Re: Help required on Digester class
>
>
>
>
>On Tue, 30 Apr 2002, Vijay Arokayaraj wrote:
>
>> Date: Tue, 30 Apr 2002 05:18:39 -0700
>> From: Vijay Arokayaraj <[EMAIL PROTECTED]>
>> Reply-To: Struts Users Mailing List <[EMAIL PROTECTED]>,
>> [EMAIL PROTECTED]
>> To: [EMAIL PROTECTED]
>> Subject: Help required on Digester class
>>
>> Hi all,
>> I am new to struts. My question is do we have to use the Digester class
>to actually read any of the XML files? If so how do I actually map an XML
>file into a class object (class here represents a model) when the XML file
>has got multiple elements in them and is not attribuite oriented . For
example
>>
>> <?xml version="1.0"?>
>> <user>
>> <name>vijay</name>
>> <mail>[EMAIL PROTECTED]</mail>
>> </user>
>>
>
>One way to do this would be to define a Digester rule for each nested
>property name:
>
> digester.addObjectCreate("user", "com.mycompany.MyUserClass");
> digester.addCallMethod("user/name", "setName", 0);
> digester.addCallMethod("user/mail", "setMail", 0);
>
>The third argument of zero is a special case that says to use the body
of
>the matching element as the single argument.
>
>> Following the strut example I would structure the XML as
>> <?xml version="1.0"?>
>> <user name="vijay" mail="[EMAIL PROTECTED]"/>
>>
>> Since I may have 2 mail accounts and I may represent it in my XML as
>> <mail>[EMAIL PROTECTED]</mail>
>> <mail>[EMAIL PROTECTED]</mail>
>>
>
>While the rules above will still work (your setMail() method will get
>called once per mail address), in cases like this I normally design my
>bean to have an "addMail" method instead so that it's obvious what is
>going on. Then, just change the third rule above to:
>
> digester.addCallMethod("user/mail", "addMail", 0);
>
>and you are all set.
>
>> Is there something that I am missing in the digester class.
>>
>> If I write my own implementation that maps a XML elemets into java
>> classs's am I deviating from the Struts Frame work.
>>
>
>You might also want to look at the "betwixt" package in the project
>sandbox at Jakarta Commons <http://jakarta.apache.org/commons>. It has
>logic that is designed to map from XML structures to JavaBeans (using
>Digester rules) and back again.
>
>> Many thanx in advance,
>>
>> Vijay
>>
>
>Craig
>
>
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Ajay Chitre
Diligent Team, Inc.
(Where Diligent People Work as a Team)
http://www.DiligentTeam.com
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