[OpenAjaxIDE] [OpenAjaxGadgets] Widget constructors - property bag *not* passed

Jon Ferraiolo jferrai at us.ibm.com
Thu Aug 14 10:53:10 PDT 2008

Hi Howard,
So we can hammer through this issue, are you available for the IDE phone
call next Tuesday (1pm PT) or a Gadgets phone call next Wednesday (also 1pm

Stew is out this week, but I assume he will be available next week.


             "Howard Weingram"                                             
             <weingram at tibco.c                                             
             om>                                                        To 
                                       Jon Ferraiolo/Menlo Park/IBM at IBMUS, 
             08/13/2008 05:06          <ide at openajax.org>,                 
             PM                        <gadgets at openajax.org>              
                                       RE: [OpenAjaxGadgets] Widget        
                                       constructors - property bag *not*   

I am not sure about this, Jon.

The property bag being passed in could include properties
(such as local security callbacks) that are not intended for
external advertisement.

Could we please leave this in here for now? Thanks.


 From: gadgets-bounces at openajax.org [mailto:gadgets-bounces at openajax.org]
 On Behalf Of Jon Ferraiolo
 Sent: Wednesday, August 13, 2008 1:07 PM
 To: ide at openajax.org; gadgets at openajax.org
 Subject: [OpenAjaxGadgets] Widget constructors - property bag *not*

 As we worked on the reference implementation, we discovered that there was
 no need to pass a property bag to the widget constructor, as we have
 talked about in the past. The widget can simply call
 widgetwrapper.getPropertyValue() for any property values that it needs,
 and can make the call to getPropertyValue() at the time when the widget
 needs the information. Another approach to getting property values is to
 take advantage of the @@foo@@ macro substitution feature by including
 something like <javascript>var backgroundcolor='@@bgcolor@@';</javascript>

 In our reference implementation, we maintain copies of property values on
 both sides (i.e., one copy in the mashup editor and one copy in the widget
 itself), so when a widget calls getPropertyValue(), there is negligible
 performance impact. It seems likely that other implementations would use a
 similar approach.

 Does anyone see any problems with removing the preliminary section in the
 spec (i.e., still has red-colored comments) that talks about passing the
 property bag to the widget constructor? To me, this is a vestigial section
 that no longer makes sense. Here is the section of the spec that I propose
 to remove:


 If no one objects by the end of the week, I'll remove this section.


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