[Axualize-users] Re: Strange behavior in boolean logic?

[Russell W. <rus...@ya...>]

Hi Frank,

Ahhh, once again your logic makes sense, the syntax is just not cutrrently
supported.

Here is the offending piece:
                <boolean id="ans">
                  <object idref="validator" method="validateForm">
                    <object idref="fields"/>
                  </object>
                </boolean> 

The primitive (<boolean><int><short><byte><char><long><float><double><string>)
tags can only be used two ways:
1) With the value of the primitive expressed as the text of the element like
this:
  <boolean id="ans">true</boolean>

2) With the value of the primitive expressed as the value of the "val"
attribute like this:
  <boolean id="ans" val="true"/>

In any case this does not limit you from doing what you want to do. The
Symantics are just slightly differemt:
  <void idref="validator" method="validateForm" id="ans">
    <object idref="fields"/>
  </void>

Now the boolean result of the method call is correctly stored in the model as
"ans".

Thanks for pointing out another thing to clarify in the docs.

Also, I may see about implementing a third form for primitives which would take
the primitive wrapper as an argument now that I see that it may be more
intuitive for some people. 

My worry is that "wrapper constructor" form requires a primitive object which
already exists. If it already exists we are not really creating a primitive,
but simply wanted to get at it to store it. In which case I don't see it as
truly useful, it is simply longer syntax, and more work for Axualize. Still, I
am open minded about it. The only real use I could see would be in creating
"copies" of primitive wrapper objects, but that can already be done more
easily.

WR
Russ
--- Frank Burough <fwb...@ch...> wrote:
> Hi--
> 
> When I just <echo> the result to a method call, I see the expected output.
> But 
> when I attempt to assign the result of the method call to a boolean for 
> comparison ton contro logic, the method is not getting called, and the 
> boolean is set to 'false' (which may be the default?) 
> 
> I assume I am doing something wrong here, any help would be greatly 
> appreciated.
> 
> 
> Here is a piece of my XML file:
> 
>                 <echo>
>                   <object idref="validator" method="validateForm">
>                     <object idref="fields"/>
>                   </object>
>                 </echo>
>                 <boolean id="ans">
>                   <object idref="validator" method="validateForm">
>                     <object idref="fields"/>
>                   </object>
>                 </boolean> 
>                 <if expr="ans == true">
>                   <echo>
>                     <string>Validation Succeeded...</string>
>                   </echo>
>                 <else>
>                   <echo>
>                     <string>Validation Failed...</string>
>                   </echo>
>                 </else>
>                 </if>
>  
> That is, I call a method 'validateForm' with an ArrayList of data to
> validate.
> 
> Here is what I see:
> 
> validateForm:We have 1 fields to validate
> validateForm:Inside validateForm...
> validateForm:String value: 'Title'
> validateForm:Required: 'true'
> validateForm:Integer type value is '0'
> validateForm:The form return status is 'true'
> true <-- this line is echoed from my XML file 
> Validation Failed... <-- echoed from my XML file as well
> 
> And here is how I interpret what I see:
> Thus, the validateForm method is called, and all my hastily-added debugging 
> prints out, then the resulting boolean is printed as 'true' as it should be. 
> However, in the lines that follow, where the result of the method call is to 
> be assigned to a boolean no debug lines from validateForm are printed, 
> indicating that it was not called.
> 
> 


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