Re: Custom ViewHandlers
The JSF 1.1 spec mentions the delegation in 10.3.5 Delegating Implementation Support (10-52). From what I've seen, Facelets delegates to the JSPViewHandler when it can't find the specified view. So if you can't rely on the order of registered view handlers, you have to rely on the handle-or-delegate behaviour. Seems to work with Facelets, but I don't know how others deal with it. On 3/28/07, Brad Smith [EMAIL PROTECTED] wrote: Jörn - I do not know. Any examples that I have seen (e.g. Facelets with Trinidad or Facelets with Ajax4JSF) show Facelets being registered in web.xml via a custom context configuration. I am having a difficult time finding any specification for JSF configuration file (faces-config.xml by default) that describes the delegation process. Brad On Tue, 2007-03-27 at 17:12 +0200, Jörn Zaefferer wrote: Isn't the delegation supposed to allow registering of more then one view handler?
Re: Custom ViewHandlers
Isn't the delegation supposed to allow registering of more then one view handler? On 3/27/07, Brad Smith [EMAIL PROTECTED] wrote: Thank you Simon. Do you by chance know what to do when also using something like Facelets which also has a custom ViewHandler? I mean as far as how the faces config file would be set up? Thanks, Brad Smith On Tue, 2007-03-27 at 13:00 +1200, Simon Kitching wrote: First write a subclass of ViewHandler that takes another ViewHandler as a parameter to the constructor. This constructor will be called passing the preceding viewhandler instance so you can chain calls to it from your custom class. Second, add the following to your faces config file: application view-handlerexample.MyViewHandler/view-handler /application
Re: Custom ViewHandlers
From: Jörn Zaefferer [EMAIL PROTECTED] Isn't the delegation supposed to allow registering of more then one view handler? Yes, but you can not control the order they are registered. You might have a scenario where your view handler is registered before a greedy view handler that wants the hook you are trying to override. Gary On 3/27/07, Brad Smith [EMAIL PROTECTED] wrote: Thank you Simon. Do you by chance know what to do when also using something like Facelets which also has a custom ViewHandler? I mean as far as how the faces config file would be set up? Thanks, Brad Smith On Tue, 2007-03-27 at 13:00 +1200, Simon Kitching wrote: First write a subclass of ViewHandler that takes another ViewHandler as a parameter to the constructor. This constructor will be called passing the preceding viewhandler instance so you can chain calls to it from your custom class. Second, add the following to your faces config file: application view-handlerexample.MyViewHandler/view-handler /application
Re: Custom ViewHandlers
Jörn - I do not know. Any examples that I have seen (e.g. Facelets with Trinidad or Facelets with Ajax4JSF) show Facelets being registered in web.xml via a custom context configuration. I am having a difficult time finding any specification for JSF configuration file (faces-config.xml by default) that describes the delegation process. Brad On Tue, 2007-03-27 at 17:12 +0200, Jörn Zaefferer wrote: Isn't the delegation supposed to allow registering of more then one view handler?
Re: Custom ViewHandlers
Brad Smith wrote: I was wondering how a custom ViewHandler is managed in MyFaces. A custom view handler seems to be an elegant solution to a problem I am dealing with, yet I will also be using Facelets. Facelets uses a decorator pattern in it's ViewHandler, that is the constructor takes a base ViewHandler as the only argument. I am wondering how to easily chain ViewHandlers so that my custom ViewHandler can decorate the FaceletViewHander (or other ViewHandler such as the default ViewHandler for MyFaces). It's very simple. I did it just a week or so ago; it was an attempt at fixing something that turned out easier in another way so I've deleted that code however here's what I remember: First write a subclass of ViewHandler that takes another ViewHandler as a parameter to the constructor. This constructor will be called passing the preceding viewhandler instance so you can chain calls to it from your custom class. Second, add the following to your faces config file: application view-handlerexample.MyViewHandler/view-handler /application All done. Regards, Simon
Re: Custom ViewHandlers
From: Simon Kitching [EMAIL PROTECTED] Brad Smith wrote: I was wondering how a custom ViewHandler is managed in MyFaces. A custom view handler seems to be an elegant solution to a problem I am dealing with, yet I will also be using Facelets. Facelets uses a decorator pattern in it's ViewHandler, that is the constructor takes a base ViewHandler as the only argument. I am wondering how to easily chain ViewHandlers so that my custom ViewHandler can decorate the FaceletViewHander (or other ViewHandler such as the default ViewHandler for MyFaces). It's very simple. I did it just a week or so ago; it was an attempt at fixing something that turned out easier in another way so I've deleted that code however here's what I remember: First write a subclass of ViewHandler that takes another ViewHandler as a parameter to the constructor. This constructor will be called passing the preceding viewhandler instance so you can chain calls to it from your custom class. Second, add the following to your faces config file: application view-handlerexample.MyViewHandler/view-handler /application All done. Trinidad also has an interesting pluggable view handler. They call it an InternalView handler. The basic idea is that there is a properties file that you register viewIds [1] that are associated with internal views. Next, you provide your custom implementation of the InternalView interface [2]. [1] http://svn.apache.org/viewvc/shale/sandbox/shale-clay-trinidad/src/main/resources/META-INF/org.apache.myfaces.trinidad.render.InternalView.properties?view=log [2] http://svn.apache.org/viewvc/shale/sandbox/shale-clay-trinidad/src/main/java/org/apache/shale/clay/PageHandler.java?view=markup Gary Regards, Simon
Re: Custom ViewHandlers
Thank you Simon. Do you by chance know what to do when also using something like Facelets which also has a custom ViewHandler? I mean as far as how the faces config file would be set up? Thanks, Brad Smith On Tue, 2007-03-27 at 13:00 +1200, Simon Kitching wrote: First write a subclass of ViewHandler that takes another ViewHandler as a parameter to the constructor. This constructor will be called passing the preceding viewhandler instance so you can chain calls to it from your custom class. Second, add the following to your faces config file: application view-handlerexample.MyViewHandler/view-handler /application
