This also seems like a good place to use a DynamicProxy. Since most all of the Java Collections package is interfaced base, this seems like it might be an elegant solution.
--Kevin -----Original Message----- From: David Graham [mailto:dgraham1980@;hotmail.com] Sent: Wednesday, October 30, 2002 3:44 PM To: [EMAIL PROTECTED] Subject: Re: [OT] Getting a Collection's size in JSTL That's pretty much what I did except you can only set the internal collection in the constructor. It's an elegant solution that should probably (in some form) be included in a larger library. David >From: Kris Schneider <[EMAIL PROTECTED]> >Reply-To: "Struts Users Mailing List" <[EMAIL PROTECTED]> >To: Struts Users Mailing List <[EMAIL PROTECTED]> >Subject: Re: [OT] Getting a Collection's size in JSTL >Date: Wed, 30 Oct 2002 15:30:13 -0500 > >It should also be relatively painless to use a composition/delegation >approach. > >public class CollectionBean { > > private Collection c; > > public int getSize() { > return this.c.size(); > } > > public void setCollection(Collection c) { > this.c = c; > } > > public Collection getCollection() { > return this.c; > } >} > ><jsp:useBean id="collBean" class="com.foo.CollectionBean"/> ><c:set target="${collBean}" > property="collection" > value="${requestScope.theCollection}"/> ><c:out value="${collBean.size}"/> > >Or something along those lines. Of course, you could completely set up the >collection bean prior to hitting the JSP as well. > >Quoting David Graham <[EMAIL PROTECTED]>: > > > I actually thought of a better idea which is getting into commons > > collections territory but I'll post a quick description here. I made a > > JstlCollectionWrapper class that wraps any Collection object and >implements > > > > the Collection interface. I added a getSize() method to this class. >The > > business layer classes can return standard Java collections like >ArrayList > > and you can wrap them in this class when using them in JSTL. > > > > A similar approach could be taken with the Map interface. I wish they >would > > > > just add getSize to the standard classes :-(. > > > > David > >-- >Kris Schneider <mailto:kris@;dotech.com> >D.O.Tech <http://www.dotech.com/> > >-- >To unsubscribe, e-mail: ><mailto:struts-user-unsubscribe@;jakarta.apache.org> >For additional commands, e-mail: ><mailto:struts-user-help@;jakarta.apache.org> _________________________________________________________________ Protect your PC - get McAfee.com VirusScan Online http://clinic.mcafee.com/clinic/ibuy/campaign.asp?cid=3963 -- To unsubscribe, e-mail: <mailto:struts-user-unsubscribe@;jakarta.apache.org> For additional commands, e-mail: <mailto:struts-user-help@;jakarta.apache.org> -- To unsubscribe, e-mail: <mailto:struts-user-unsubscribe@;jakarta.apache.org> For additional commands, e-mail: <mailto:struts-user-help@;jakarta.apache.org>
