[rules-users] 'or' with predicate/return val/inline eval with property issue?

Edson Tirelli tirelli at post.com
Wed Nov 21 07:48:54 EST 2007


    Ronald,

    In my tests, it works if you use a simple constraint. The problem only
happens with constraints that use semantic code.
    I tracked down the problem and it is in the LogicTransformer that is
used when an "or" CE is present.

    []s
    Edson

2007/11/21, Ronald R. DiFrango <ron.difrango at gmail.com>:
>
> One question do you get different reslts if you do the folowing for the
> first rule:
>
> Message(  message == "somethingDifferent" ) # this should never match
>
> All I did was eliminate the eval and the explicit call to equals
>
> On Nov 21, 2007 4:05 AM, Michal Bali <michalbali at yahoo.ie> wrote:
>
> > Hi,
> >
> > I have following rule that should never fire, but it does :)
> >
> > package com.sample
> > import com.sample.DroolsTest.* ;
> > rule "ruleThatShouldNeverFire"
> >        when
> >                Message(  eval("somethingDifferent".equals(message)) ) #
> > this should never match
> >                SomeBeanA( ) or SomeBeanB( )
> >        then
> >                System.out.println( drools.getRule().getName() + " fired
> > and shouldn't" );
> > end
> >
> > stateful ruleSession with following insertions:
> >            Message message = new Message();
> >            message.setMessage(  "Hello World" );
> >            workingMemory.insert( message );
> >            workingMemory.insert( new SomeBeanA() );
> >            workingMemory.insert( new SomeBeanB() );
> >
> > It behaves the same way if we use predicates or retun values:
> >            #Message(  msg : message -> ("somethingDifferent".equals
> > (msg)) ) # this should never match
> >            #Message(  message == ("somethingDifferent".equals (message))
> > ) # this should never match
> >
> > It looks like the AlphaNode is missing from the Rete network.
> >
> > Tested with Drools 4.0.3. Java build 1.5.0_11-b03.
> >
> > Any ideas if this is a bug or am I doing something wrong?
> >
> > Thanks.
> > Regards,
> > Michal
> >
> > Send instant messages to your online friends
> > http://uk.messenger.yahoo.com
> >
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> >
> >
>
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-- 
  Edson Tirelli
  JBoss Drools Core Development
  Office: +55 11 3529-6000
  Mobile: +55 11 9287-5646
  JBoss, a division of Red Hat @ www.jboss.com
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