Re: generator type value substitution

[Ugo Cei]

Il giorno 28/apr/04, alle 20:44, Leszek Gawron ha scritto:

Missed the original e-mail, why not just push the problem down a 
level:

	<map:generate type="superGenerator" src="{1}"/>

SuperGenerator can then figure out what to do by looking at the
source...
I have already thought of that but the problemis that here the 
"source" is the
generator name. Do you know how should I lookup a generator, setup it 
properly
(to support map:parameter for example) and than invoke it? with 
everything
done not to break sitemap reloading (new generators may come in place, 
old may
be deleted), caching and other stuff I cannot really comprehend :)
Wrap and delegate:

<map:generate src="superGenerator" src="uri">
  <map:parameter name="class" value="GeneratorX"/>
</map:generate>
public class SuperGenerator implements Generator {

  Generator specialGenerator;

  public void setup(SourceResolver resolver, Map objectModel, String 
srcURI, Parameters par) {
    specialGenerator = (Generator) 
Class.forName(par.getParameter("class")).newInstance();
    specialGenerator.setup(resolver, objectModel, srcURI, par);
  }

  public void generate() {
    specialGenerator.generate();
  }
}
You could also make all your generators Avalon components and retrieve 
them via a ServiceManager, if you wish, instead of using Class.forName.

Hope you get the idea.

	Ugo