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From "Gerhard Petracek (JIRA)" <...@myfaces.apache.org>
Subject [jira] [Commented] (EXTCDI-175) introduce @ViewParam annotation for page beans
Date Sun, 11 Sep 2011 14:59:08 GMT

    [ https://issues.apache.org/jira/browse/EXTCDI-175?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13102285#comment-13102285
] 

Gerhard Petracek commented on EXTCDI-175:
-----------------------------------------

since it's annotation based, we have to provide the following approaches
#1 @RequestParam for view-controllers - manual injection before  @InitView -> for errors
we might need e.g. an additional context which provides more details than FacesContext#isValidationFailed
later we can think about:
#2 @Inject has to be used if it should be used outside of a view-controller -> lazy injection
outside of the corresponding lifecycle-phase -> might be too complex

> introduce @ViewParam annotation for page beans
> ----------------------------------------------
>
>                 Key: EXTCDI-175
>                 URL: https://issues.apache.org/jira/browse/EXTCDI-175
>             Project: MyFaces CODI
>          Issue Type: New Feature
>            Reporter: Mark Struberg
>
> When using the ViewConfig in CODI we not only get type safe navigation but also know
the 'connection' between views and their backing beans. We already support annotations like
@PreRenderView and likes for such beans. 
> We should also support the direct annotation of view parameters directly in the backing
beans.
> instead of declaring the view parameters in the xhtml:
> <f:metadata>
>   <f:viewParam id="versionParam" name="version" value="#{backingbean.versionString}"
required="false"/>
>   <f:viewParam id="searchString" name="s" value="#{backingbean.searchString}" required="false"/>
> </f:metadata>
> we can maybe use an annotation directly in the backing bean:
> @Named
> @RequestScoped
> public class Backingbean {
>   @ViewParam(required=false, name="version")
>   private String versionString;
>   @ViewParam(required=false, name="s")
>   private String searchString;
>   @PreRenderView
>   private void dosomeinit() {
>   ...
>   }
> }

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