Re: [newbie] managed-property in face-config.xml

[Simon Kitching <si...@rhe.co.nz>]

Hi Ken,

ken carlino wrote:
> Can you help me understanding what is the difference between putting
> '#{param.userName}' vs putting '#{userManager}' as the value of a
> managed property?
>
> What is the meaning of the 'param' in the expression?
>
>  <managed-property>
>          <property-name>userName</property-name>
>          <value>#{param.userName}</value>
>        </managed-property>
>        <managed-property>
>            <property-name>userManager</property-name>
>            <value>#{userManager}</value>
>        </managed-property>
JSF provides a number of objects that are available for use by default; 
these are called "implicit objects".
   http://java.sun.com/j2ee/1.4/docs/tutorial/doc/JSFPage10.html

 As you can see from the "implicit objects" table at the above url, 
#{param} accesses the request parameters in the http request. The 
expression #{param.userName} is therefore the http request GET or POST 
parameter with name=userName.

There is no implicit "#{userManager}" object; this is presumably 
referring to some managed-bean with that same name.


Regards,

Simon