Taylor,
I have implemented a solution like this and I highly recommend it. I actually have taken it one step further and bound the routes (and the implementation) dynamically: there is very little Java code, mostly just XML-based configuration. In the cases where configuration does not make sense, then I have subclasses that provide an implementation as your message implies. I can tell you that you will want to pass in the request to the callback: you don't always need it, but sometimes you need some contextual information (see previous post about wanting the original route URI, for example). Cliff Binstock Coyote Reporting _____ From: Taylor Cowan [mailto:[email protected]] Sent: Tuesday, January 13, 2009 7:12 AM To: [email protected] Subject: media type adaptor I'm new to restlets and would like some feedback from the community on some experimentation. Instead of if/else'ing through the list of variant types and calling the appropriate logic, I'd like reslets to do that for me. The example "MediaType" below is similar to the restlet version, except that each enumeration overrides a call back, for example, the text/html type calls back to handleTextHTML(). TEXT_HTML("text/html", "HTML document") { @Override public Representation callBack(VariantHandler arg0) { return arg0.handleTextHTML(); } }, The application developer then extends a resource from BaseResource, and implements the methods they'd like to handle. (like the AWT MouseEvent adaptors of old) The examples are not complete, I only implmented 4 media types. The BaseResource gets the media type, converts to the appropriate extended MediaType, and the invokes the callback. @Override public Representation represent(Variant variant) throws ResourceException { String mediaType = variant.getMediaType().getName(); return MediaType.value(mediaType).callBack(this); } So to handle HTML, the developer just does this: @Override public Representation handleTextHTML() { // here's where we respond to HTML clients. } http://restlets.s3.amazonaws.com/VariantHandler.java http://restlets.s3.amazonaws.com/BaseResource.java http://restlets.s3.amazonaws.com/MediaType.java ------------------------------------------------------ http://restlet.tigris.org/ds/viewMessage.do?dsForumId=4447&dsMessageId=1022252
