From: Felipe Gaúcho <fgaucho_at_gmail.com>
Date: Wed, 2 Apr 2008 18:09:25 +0200

actually, in my case the operations are like that:

class A {
        processPdfAttachment(PdfAttachment obj) { ... }
        processFlashAttachment(FlashAttachment obj) { ... }
        processGifAttachment(GifAttachment obj) { ... }
        processHtmlAttachment(HtmlAttachment obj) { ... }
 }

all these "attachments types" are subclasses of the AbstractAttachment.....

the idea was:

class A {
        processAttachment(Attachment<T> obj) { ... }
  }