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Inject into a static factory class?

Michael Wills

21 Mar, 2010 07:26 AM via web

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Just wondering if it is possible to inject into a factory class for use in a static method. Tonight I had a case where I wanted to use a function in my model in a factory but it was only needed in one place at one time so it didn't seem like it warranted pulling it out into a static function itself or redefining it as a static function in the model. So I was hoping I could inject into the factory class. The result was a null reference error so if it is possible I am just probably missing something very simple. The factory extended Actor (using mvcs) in hopes of being able to do that. I'll look into it again later though I was able to work around it. I'm sure I'm just missing something so any pointers would be most welcome.

And wow this framework rocks.

1. 2 Posted by Jonny Reeves on 23 Mar, 2010 11:06 AM

   

   Hi Michael,

   Could you possible paste the Static Factory class in question so we can have a look at it? My initial guess would be "no", however it does beg the question as to why the Factory needs to be static in the first place?

   Jonny.

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2. 3 Posted by Michael Wills on 23 Mar, 2010 06:53 PM

   

   Ah the class itself isn't static, just the method being called. Unfortunately I can't post the code but it's pretty straightforward similar to this

   public class ItemFactory extends Actor
   {
   
       public static function makeItem( xml:XML ):ItemVO
       {
           var vo:ItemVO;
           if( xml != null )
           {
               vo = new ItemVO();
               vo.text = xml.text.toString();
               vo.name = xml.name.toString();
               vo.image1 = xml.image[0]***@src.toString();
               vo.caption1 = xml.image[0].caption.toString();
               vo.thumb = ***@src.toString();
           }
           return vo;
       }
   }
   

   There is a function in the model which can set the color which would require injecting a model instance accessible from that static method.

   Thinking about it now though, that factory class was never instantiated and as such there was never a chance to inject the variable. So if it weren't a static method and the factory was injected as a singleton instead, that would solve the problem. I was just used to thinking of Factory classes exposing static methods which is where the hangup was.

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3. 4 Posted by Jonny Reeves on 24 Mar, 2010 10:25 AM

   

   Yep; I used to be the same and make all my Factories static; it's quite liberating to change this point of view ;)

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4. Stray closed this discussion on 11 Feb, 2011 11:36 PM.

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