On Tue, 14 Jan 2003, Justin Ashworth wrote:
> Date: Tue, 14 Jan 2003 08:50:14 -0500 > From: Justin Ashworth <[EMAIL PROTECTED]> > Reply-To: Jakarta Commons Users List <[EMAIL PROTECTED]> > To: [EMAIL PROTECTED] > Subject: [Digester] Passing arguments to constructors > > Hi, > > I just started using Digester yesterday and it has already saved me a lot of > time. However, there is one thing which I haven't been able to figure out > how to do that is making up for the time I saved. I have a condition under > which a certain object should not be created from the XML. I am reading in > menu contents from an XML file and I want to make the menu dynamic based on > the user's permissions, known only at runtime. I could easily do this if I > could just pass the permissions into the constructor when a new object is > created or, alternatively, when setNext is called. That way I can determine > at runtime whether or not the object should be saved or ignored, based on > whether or not the user has appropriate permissions. Right now what I have > to do is create the entire object then parse through it and prune the > branches that shouldn't exist, which as you could imagine takes a lot of > time. Are there any provisions for doing what I'm trying to do with > Digester? If not, does anybody else think this would be worthwhile enough > that I could implement the feature in Digester? > Check out the ObjectCreationFactory rule. Instead of specifying the class of the object you're trying to create, you specify the class of a Factory object -- which can do anything necessary to create the instance of the actual object (including calling a constructor with parameters, or calling some other object factory, or ...). > Thanks much, > > Justin Craig -- To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>
