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From Gilles Gaillard <>
Subject Re: [digester] 20903 - CallFactoryMethodRule
Date Thu, 03 Feb 2005 16:11:12 GMT
Sorry for the bad formatting, corrected inline.

> Hi Simon,
> There are some cases where you know the objects being present on the
> Digester's stack. In this case, you would like to be able to access 
> them directly so that you can call their methods and pass them 
> parameters that are present in the xml attributes.
> With further refinement, you would also like to pass to them parameters
> that are objects that are already present on the stack. Then once, the 
> call return, you would like to push (or not) the result on the stack.
> This is what the CallFactoryMethodRule does.
> It is a digester rule that enables to define the caller of the method,
> the name of the method and its parameters. The the result of the call
> can be pushed on the stack.
> The following is an excerpt of a xml digester usage of the rule: 

  <pattern value="employee">
      paramnames="firstName,lastName" pushit="true"/>
      <set-next-rule methodname="setModel"/>
    <pattern value="address">
      <set-next-rule methodname="addAddress"/>

> There is a more detailled presentation of this in the header of class
> CallFactoryMethodRule.
> Regards,
> Gilles
>> Hi Gilles,
>> Sorry it took so long to get around to having a look at this bugzilla 
>> entry.
>> A lot of work has clearly gone into the attached code. However I 
>> don't really
>> understand what the purpose of it is...and send a summary of what 
>> this code
>> achieves, so that we can all discuss this patch? ..
>> I am concerned about the significant complexity of the code (as will 
>> other
>> digester maintainers), and so would like to understand what benefits 
>> users would
>> gain by having this CallFactoryMethodRule available....
>> Thanks for your offer of this code, and hope to see your email soon.
>> Regards,
>> Simon

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