How do I bind this bean property?

[seb petterson]

In page1.jsp I need to have <h:outputText value="handler.messageForKey" />

And page1.jsp is loaded via a javascript. So before page1 is loaded handler.key needs to be set so that the correct message is returned above. In the javascript I have access to key value, but I dont know where or how to bind it to handler.key, the key value is just a text in the html.

One way I was thinking was to pass the value as a request parameter to page1.jsp, but I still dont know how to use this to bind it to handler.key before the getMessageForKey is called.


Any ideas?
[ August 26, 2005: Message edited by: seb petterson ]

[Kevin Galligan]

I think you need more code example and detail. I don't really know what you mean by "loaded via a javascript".

I think this might work (or something close to it)...

<managed-property>
<property-name>messageForKey</property-name>
<value>
            #{facesContext.externalContext.request.parameter.messageKey}
        </value>
</managed-property>

However, I defer to the experts on this list.

[Kevin Galligan]

Man. Always a greenhorn. Never a ranch hand. Anway...

I think my explanation was a little light. This...

<managed-property>
<property-name>messageForKey</property-name>
<value>
            #{facesContext.externalContext.request.parameter.messageKey}
        </value>
</managed-property>

would go inside your faces config for handler bean. However, my example was off. Let me try again...

URL: /page1.jsp?messageKey=ozzy

<managed-bean>
<managed-bean-name>handler</managed-bean-name>
<managed-bean-class>
com.yourthing.HandlerBean
</managed-bean-class>
<managed-bean-scope>request</managed-bean-scope>
<managed-property>
<property-name>key</property-name>
<value>
            #{facesContext.externalContext.request.parameterMap.messageKey}
                </value>
</managed-property>
</managed-bean>

Make sure the scope stays as request. If its session or above, it'll only set the key the first time.

Again, comments from the experts?

[Kevin Galligan]

Oh yeah, if you want the bean to be in session scope, you could write the 'getKey' function to do the following...

return ((ServletRequest)FacesContext.getCurrentInstance().getExternalContext().getRequest()).getParameter("messageKey);

[seb petterson]

Thanks, cant quite get it to work though.

I think the code sample you gave of the managed-property element should be #{facesContext.externalContext.requestMap... but then what? Ive tried["messageKey"], and .messageKey, but it doesnt work. The value of the managedBean property is just set to null.

Help?

[seb petterson]

Ok got it. In order to pick up the value from request parameter, the managed property declaration should be #{param.key} in the value element.