[ http://issues.apache.org/struts/browse/WW-1347?page=comments#action_37853
]
Ted Husted commented on WW-1347:
--------------------------------
> In what way do you see adding an "extends" attribute helping an application
> that can't be done with packages?
Say, I'm trying to do away with the ! notation,and I have an action stanza like
this:
<action name="Logon" class="mailreader2.Logon">
<result name="input">/pages/Logon.jsp</result>
<result name="cancel" type="redirect-action">Welcome</result>
<result type="redirect-action">MainMenu</result>
<result name="expired" type="chain">ChangePassword</result>
<exception-mapping
exception="org.apache.struts.apps.mailreader.dao.ExpiredPasswordException"
result="expired"/>
<interceptor-ref name="guest"/>
</action>
With wildcards, I can change the first line to read:
<action name="Logon!*" class="mailreader2.Logon" method={1}>
and the old aliases will work just fine. Except for the default execute method.
To invoke the execute method, we need to use a URI like "Logon!execute", or
repeat the stanza.
With extends we could keep the original element as is and just add
<action name="Logon!*" extends="Logon" method={1} />
If we didn't like wildcards for some reason, with extends we could specify
exactly with methods to expose.
<action name="Logon!delete" extends="Logon" method="delete" />
<action name="Logon!copy" extends="Logon" method="copy" />
We could also override some of the alias action mappigs, if needed.
<action name="Logon!delete" extends="Logon" method="delete" >
<result name="cancel" type="redirect-action">Welcome</result>
</action>
I think one reason people dislike declarative configurations is because we
don't try hard enough to ensure that we can "say it once" in XML.
-Ted.
> SAF1 Features to Implement
> --------------------------
>
> Key: WW-1347
> URL: http://issues.apache.org/struts/browse/WW-1347
> Project: Struts 2
> Issue Type: Task
> Components: Documentation
> Reporter: Ted Husted
> Assigned To: Don Brown
> Fix For: 2.0.0
>
>
>
> * Wildcard Action Mappings - Complete
> * DynaForm as Model Object
> * Extends for action mappings
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