Hi,
i followed your suggestion, and I came out with this:
private static class MetadataRule extends Rule {
public void begin( String ns, String name,
Attributes att) {
Map ctx = new HashMap();
ctx.put("METADATA_NAME", att.getValue("name"));
getDigester().push( ctx);
}
public void body( String ns, String name,
String text) {
Map ctx = ( Map) getDigester().pop();
String metadataName = (String) ctx.get("METADATA_NAME");
String methodName = StringUtils.capitalize(metadataName);
Object onTop = getDigester().peek();
try {
Method metadataSetter =
onTop.getClass().getMethod("set"+methodName, new
Class[] {String.class});
log.info("Method via reflect: "+ metadataSetter);
metadataSetter.invoke(onTop, text);
} catch(NoSuchMethodException nsme) {
nsme.printStackTrace();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
}
}
which works fine.
thanks,
valerio
On 2/10/06, Simon Kitching <[EMAIL PROTECTED]> wrote:
>
> On Thu, 2006-02-09 at 18:44 +0100, Valerio Schiavoni wrote:
> > Hello,
> > this is the input xml:
> > <website>
> > <pageclass>
> > <page>
> > <metadata name="title">the title</metadata>
> > <metadata name="content">the content</metadata>
> > <metadata name='someUknownName'>...</metadata>
> > </page>
> > </pageclass>
> > </website>
> >
> > in the DigesterReader.java:
> >
> > digester.addObjectCreate("website/pageclass/page",Notizia.class);
> >
> > And here comes comes the problems:
> > --how to call notizia.setTitle("the title"); ?
> > --how to call notizia.setContent("the content"); ?
> > --how to call notizia.setUnknownValue("..."); ?
>
> Unfortunately there is currently no built-in rule in Digester to do
> this. It's listed as a to-do item:
> http://wiki.apache.org/jakarta-commons/Digester/TODO
>
> Implementing this in a way that supports wildcard expressions (ie where
> nested invocation of the rule instance is possible) is tricky which is
> why it hasn't been done yet.
>
> However a simpler implementation of this rule should do in your case,
> and *is* quite easy to write. Just create a custom Rule class, and in
> the begin method save the value of the "name" attribute on the rule
> instance. In the "body" method, use reflection to find the appropriate
> method on the object on the top of the stack and invoke it; the
> SetNextRule or CallMethodRule classes should be good examples.
>
> Don't be concerned about writing a custom Rule class; it's quite
> acceptable and not particularly difficult.
>
> Regards,
>
> Simon
>
>
>
>
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--
To Iterate is Human, to Recurse, Divine
James O. Coplien, Bell Labs
(how good is to be human indeed)
