Re: [OT]: I don't see how this works?

[Simon Kelly]

Thanks Dave.

----- Original Message -----
From: "Durham David Cntr 805CSS/SCBE" <[EMAIL PROTECTED]>
To: "Struts Users Mailing List" <[EMAIL PROTECTED]>
Sent: Friday, January 17, 2003 4:12 PM
Subject: RE: [OT]: I don't see how this works?


That will sort whatever is inside of lActions base on the anonymous
comparator object.  Check here for details on the Comparator interface,
http://java.sun.com/j2se/1.4/docs/api/java/util/Comparator.html





> -----Original Message-----
> From: Simon Kelly [mailto:[EMAIL PROTECTED]]
> Sent: Friday, January 17, 2003 4:22 AM
> To: Struts Users Mailing List
> Subject: [OT]: I don't see how this works?
>
>
> I'm just scanning thru the struts source, looking for
> ModuleConfig stuff and
> ran over this bit of code.
>
> I've never seen anything written like it and wondered what
> it's doing and
> how the hell does it work?
>
> Cheers
>
> Simon
>
> <CODE>
> Collections.sort(lActions, new Comparator() {
> public int compare(Object o1, Object o2) {
> ValidatorAction va1 = (ValidatorAction) o1;
> ValidatorAction va2 = (ValidatorAction) o2;
> if ((va1.getDepends() == null || va1.getDepends().length() == 0)
> && (va2.getDepends() == null || va2.getDepends().length() == 0)) {
> return 0;
> } else if (
> (va1.getDepends() != null && va1.getDepends().length() > 0)
> && (va2.getDepends() == null || va2.getDepends().length() == 0)) {
> return 1;
> } else if (
> (va1.getDepends() == null || va1.getDepends().length() == 0)
> && (va2.getDepends() != null && va2.getDepends().length() > 0)) {
> return -1;
> } else {
> return va1.getDependencies().size() - va2.getDependencies().size();
> }
> }
> });
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