Re: [Webmacro-devel] setprops directive

[Lane S. <la...@op...>]

Hi Keats,

Let's document the way that it is and work with it for a while. As long 
as I can escape evaluation, then i have a working solution. Solving it 
may induce other side effects we have not thought of. I like the fact 
that you can complete evaluation.

-Lane

Keats Kirsch wrote:

> Lane,
>
> Thanks for finding this.  It's not strictly a "bug", but it is 
> undocumented, and maybe undesirable, behavior.
>
> First of all, the workaround is to escape the $ char, i.e.,
>
> #bean $Time = "java.util.Date"
> #setprops $Duration class="com.opendoors.entity.fundamental.Duration"
> {
> Start = \$Variable.get("Time")
> End = \$Variable.get("Time")
> }
>
> or more simply:
>
> #bean $Time = "java.util.Date"
> #setprops $Duration class="com.opendoors.entity.fundamental.Duration"
> {
> Start = \$Time
> End = \$Time
> }
>
> The reason for this is that the block argument of #setprops is 
> evaluated prior to assigning the properties.  The idea of this is to 
> allow you to intermix directives and property assignments.  E.g.,
>
> #setprops $Obj {
>  Count1: $x
>  #set $x = $x + 1
>  Count2: $x
> }
>
> This works fine with Strings and ints, but for other types you will 
> see the problem that you experienced.  In your case, the dates were 
> expanded into Strings, which then could not be assigned to a Date 
> property.
>
> I'm not sure which trade-off is preferable; unescaped variable syntax 
> or disallowing directives.  I suppose we could add an option, like "as 
> macro" with #setblock, to give the user a choice.  Something like, 
> "#setprops noeval ..."
>
> What do you think?
>
> Keats
>
> Lane Sharman wrote:
>
>> #bean $Time = "java.util.Date"
>> #bean $Duration = "com.opendoors.entity.fundamental.Duration" onNew
>> {
>> #set $Duration.Start = $Variable.get("Time")
>> #set $Duration.End = $Variable.get("Time")
>> #set $Duration.End = $Time
>> }
>>
>>
>> works fine.
>>
>> so there is a bug in the #setprops unless this is a "feature", 
>> converting all RHS evaluations to string.
>>
>> -Lane
>>
>> Lane Sharman wrote:
>>
>>> is the RHS term always evaluated as a String before the assignment? 
>>> What can I do to make an assigment of an object?
>>>
>>> #bean $Time = "java.util.Date"
>>> #setprops $Duration class="com.opendoors.entity.fundamental.Duration"
>>> {
>>> Start = $Variable.get("Time")
>>> End = $Variable.get("Time")
>>> }
>>>
>>>
>>> generates this error:
>>>
>>> 4:40:52 PM    template    ERROR    Error parsing template: 
>>> StringTemplate("unknown";"#set $Duration.Start=Fri Nov 25 16:40:53 
>>> PST 2005")
>>> org.webmacro.engine.ParseException: Parser Exception
>>> org.webmacro.parser.ParseException: Encountered "Fri" at line 1, 
>>> column 22.
>>>
>>>
>>
>
>
>
>
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-- 
Lane Sharman
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