Re: [Springframework-developer] ParameterNameMethodNameResolver

[Colin S. <col...@ex...>]

Ok, I'm going to add some variation of the methods from 
HttpFlowExecutionmanager to WebUtils, and will use them in 
ParameterMethodNameResolver. When you're ready to add back the 
capability in the flow system, just look there.

Keith Donald wrote:

>Just haven't added it back yet
>
>-----Original Message-----
>From: Colin Sampaleanu [mailto:col...@ex...] 
>Sent: Saturday, March 19, 2005 2:29 PM
>To: Erwin Vervaet; 'Keith Donald'
>Subject: Re: [Springframework-developer] ParameterNameMethodNameResolver
>
>What happened to the parameter handling code from 
>HttpFlowExecutionManager? I can't find it any longer after the last 
>refactoring... HttpServletRequestEvent only has a simple getParameter 
>method...
>
>
>Erwin Vervaet wrote:
>
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>
>>Colin,
>>
>>Good idea, but I think it would be better to integrate both systems in 
>>the ParameterMethodNameResolver:
>>1) first try the action=methodname syntax
>>2) if nothing found, try action:methodName=foobar syntax
>>
>>Combining the two in 1 MethodNameResolver gives you to opportunity to 
>>mix and match the 2 techniques in the view. By having 2 resolvers 
>>you're forced to use one technique or the other.
>>
>>In the web flow system we originally also had these 2 systems in 
>>seperate "ParameterExtractors", but we abandoned this in favour of a 
>>more powerfull approach that supports both systems (and actually a 
>>third: image buttons).
>>Check the following method in the sanbox source tree:
>>
>>
>>    
>>
>org.springframework.web.flow.support.HttpFlowExecutionManager.searchForReque
>stParameter(HttpServletRequest 
>  
>
>>request, String logicalName, String delimiter)
>>
>>Maybe it would be good to use that. We could move the method into the 
>>main source tree and put it on the WebUtils class.
>>
>>What do you think?
>>
>>Erwin Vervaet
>>----- Original Message ----- From: "Colin Sampaleanu" <col...@ex...>
>>To: <spr...@li...>
>>Sent: Thursday, March 10, 2005 4:55 AM
>>Subject: [Springframework-developer] ParameterNameMethodNameResolver
>>
>>
>>    
>>
>>>I've added a new resolver for the MultiActionController, 
>>>ParameterNameMethodNameResolver. Unlike ParameterMethodNameResolver, 
>>>which looks for a parameter like
>>>  action=methodname
>>>where action stays constant, and the value is the method name, 
>>>ParameterNameMethodNameResolver uses the very existene of a parameter 
>>>name as an indication to map to a specific method. So feeding it the 
>>>String mapping array
>>>  "hello:goodbye", "validate", "colin:nina"
>>>for example would map to the 'goodbye' method if there was a param 
>>>'hello', to the 'validate' method if there was a parameter named 
>>>'validate', and to 'nina' if there is a parameter named 'colin'. The 
>>>request parameter value is simply ignored, and the first match wins.
>>>
>>>This is useful when you have a bunch of submit buttons on a page, and 
>>>need to be able to tell them apart. The value attribute of a submit 
>>>button is also the display text, which is often localized, so it's 
>>>not a great mechanism to have the same button name and use the value 
>>>to tell the buttons apart. However, the name itself can be set 
>>>different for each button, and then this resolver can map based on that.
>>>
>>>Colin
>>>      
>>>
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