[rules-users] Test for Empty String?

[Wolfgang Laun]

Well, in the end it's all Java, so why should there be a better method? ;-)

I find that writing the constructors of fact objects so that they avoid
null values by setting fields to appropriate "Null" objects improves
things somewhat. In your case perhaps

CitatioDTO(){
   charge = Charge.NO_CHARGE;
   ...
}

and class Charge contains

   public static final NO_CHARGE = Charge( "",... );

-W

2009/11/5 Jason Davidson <jljdavidson at gmail.com>

> Hello,
>
> Is there an easy way to test if a String value is empty?  I've been doing
> this (Drools 4.0.7):
>     when CitationDTO
>         (
>             charge != null   &&
>             charge.drivingIncidentLegalSpeedRate != null   &&
>             charge.drivingIncidentLegalSpeedRate != ""
>         )
>     then ......
>
> It seems like there has to be a better method.
>
> Thanks,
> Jason
>
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