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Message-ID: <004a01c18365$c0a8d470$1f00a8c0@stepston4undxv>
From: "Mika Goeckel" <mika.goeckel@gmx.de>
To: <commons-dev@jakarta.apache.org>
Subject: Self configuring Objects or is it possible to change the rule set
 during the parse phase?
Date: Thu, 13 Dec 2001 00:35:58 +0100
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Hi!

Is it possible to add rules to the ruleset of a digester after the parse =
has been started?=20
The reason for that is, that it would enable us to put the knowledge =
about child objects within something like a configure() method of a just =
created object.

For example if someone creates a complicated valve with subobjects in =
tomcat, the knowledge that a valve needs to be created is for example in =
org.apache.catalina.startup.ContextRuleset.=20
Now if someone needs a Valve with subobjects configured via digester =
he/she has to change the ContextRuleset class.

If it would be possible to call a configure method on the specific =
implementation of a class, it could itself add the rules for childs.

A class could implement a ProvideRules interface defined in the digester =
package to let the digester know that it wants to provide additional =
rules.

Comments please?

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