[rules-users] check if a

[Wolfgang Laun]

As you have posted before, you can use the evaluator by referring to the
field in a previously bound fact.

$object : MyObject ( activated == false,
                             $name : name,
                             $firstValue : firstValue,
                             $valueList : valueList )

        // getting the event representing the Value object
        $firstValueEvent: Value( this == $firstValue )

        $newValue: Value ( name == $name
                                        &&  this != $firstValueEvent
                                        &&  this after[0ms,1h]
$firstValueEvent
                                        &&  $object.parameterValueList not
contains this
                                        &&  $object.valueList not contains
this   ### ###
                                        && eval(valueExceededLimit(this)) )

I've tried to invert the order. Check carefully, I may have missed a trick
;-)

$newValue: Value ( $name : name, eval(valueExceededLimit(this)) )

$object : MyObject ( activated == false,
                     name == $name,
                     $firstValue: firstValue != $newValue,
                     parameterValueList not contains $newValue,
                     valueList not contains $newValue,

$firstValueEvent: Value( this == $firstValue && != $newValue,
                         this before[0ms,1h] $newValue )

-W




2010/11/1 Tina Vießmann <tviessmann at stud.hs-bremen.de>

>  I understand why the order needs to be inverted. But that results in the
> inversion of the whole condition. I'm not sure how to revert the condition.
> The complete condition without 'not contains' and inversion is:
>
>         $object : MyObject ( activated == false,
>                              $name : name,
>                              $firstValue : firstValue,
>                              $valueList : valueList )
>
>         // getting the event representing the Value object
>         $firstValueEvent: Value( this == $firstValue )
>
>         $newValue: Value ( name == $name
>                                         &&  this != $firstValueEvent
>                                         &&  this after[0ms,1h]
> $firstValueEvent
>                                         &&  $object.parameterValueList not
> contains $newValue
>                                         &&  eval(
> !($valueList.contains($newValue))
>                                                          &&
> valueExceededLimit($newValue)) )
>
>
>
>
>
>
> To use not contains, you'll have to invert the order of the patterns:
>    $ value : Value ( // other restrictions )
>    $object : MyObject ( $valueList : valueList not contains $value )
> This will use the evaluator which should be more efficient than eval()
> -W
>
>
> 2010/11/1 Mauricio Salatino <salaboy at gmail.com>
>
>> can you try with
>> $valueList not contains $value
>> but internally I suppose that it will work in the same way that the eval.
>>
>>
>>  On Mon, Nov 1, 2010 at 11:55 AM, Tina Vießmann <
>> tviessmann at stud.hs-bremen.de> wrote:
>>
>>> Is it possible to write the following conditions without using eval?
>>>
>>>
>>>         $object : MyObject ( $valueList : valueList )  // of type List
>>>         $ value : Value ( // other restrictions
>>> && eval( !($valueList.contains($value)) ) )
>>>
>>>
>>> Thank you :)
>>> Tina
>>> _______________________________________________
>>> rules-users mailing list
>>> rules-users at lists.jboss.org
>>> https://lists.jboss.org/mailman/listinfo/rules-users
>>>
>>
>>
>>
>>  --
>>  - CTO @ http://www.plugtree.com
>>  - MyJourney @ http://salaboy.wordpress.com
>>  - Co-Founder @ http://www.jbug.com.ar
>>
>>  - Salatino "Salaboy" Mauricio -
>>
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>>
>>
>
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