[rules-users] Adding constraints to facts in DSL

[Andy Mei]

Ok, i took the liberty and created a ticket for this.

http://jira.jboss.com/jira/browse/JBRULES-1186


On 9/12/07, Edson Tirelli <tirelli at post.com> wrote:
>
>
>    All,
>
>    This is a limitation of the current DSL engine implementation. The
> problem is not really the "or", but the "-" implementation. The LHS and RHS
> of a DSL rule are processed line by line, so, to allow the behavior you are
> requesting, we will need to implement some look ahead mechanism with smart
> interpolation that does not exist today.
>    I'm not sure if someone already opened a ticket for that, but in case
> not, may I ask you please to open? We will look into supporting that in the
> future.
>
>    []s
>    Edson
>
>
> 2007/9/12, Andy Mei <andy.d.mei at gmail.com>:
> >
> > I am having the same problem as Stephane does.
> >
> > It's pretty bad if I need to hard code the 'or' constraint within a
> > single DSL constraint.  I guess I could split a complex OR constraint to
> > multiple rules with the same consequences, it just an ugly hack.  Also, how
> > does this work if we need a Or constraint within another group constraint?
> >
> > I just don't understand why the following doesn't work.
> >
> > [condition][]There is a Cheese with=Cheese()
> > [condition][]- age is less than {low} =age < {low}
> > [condition][]Or=or
> > [condition][]- age is more than {high}=age > {high}
> >
> > On 9/11/07, stephane.remillieux at agysoft.fr <
> > stephane.remillieux at agysoft.fr> wrote:
> >
> > >  Hi Vincent,
> > >
> > > Thanks for your answer but I would really like to use my synthax.
> > >
> > > I need to write "or" between 2 constraints and not in a single complex
> > > constraint.
> > >
> > > If someone else could help me ...
> > >
> > > DELBART Vincent <delbart.v at mipih.fr> a écrit :
> > >
> > >
> > > > Hello Stephane,
> > > >
> > > > I think it's difficult to do that. Could you try this :
> > > > There is a Cheese with
> > > >        - age is less than 42 or age is more than 60
> > > >        - type is 'stilton'
> > > > with in your DSL
> > > > [condition][]There is a Cheese with=Cheese()
> > > > [condition][]- age is less than {low} or age is more than {high}=age
> > >
> > > > < {low} || age > {high}
> > > > [condition][]- type is '{type}'=type == "{type}"
> > > >
> > > > I don't see other solution...
> > > >
> > > > vdelbart
> > > >
> > > >
> > > >
> > > > ________________________________
> > > >
> > > > De : rules-users-bounces at lists.jboss.org
> > > > [mailto:rules-users-bounces at lists.jboss.org] De la part de
> > > > stephane.remillieux at agysoft.fr
> > > > Envoyé : mardi 11 septembre 2007 10:16
> > > > À : rules-users at lists.jboss.org
> > > > Objet : [rules-users] Adding constraints to facts in DSL
> > > >
> > > >
> > > >
> > > > Hello,
> > > >
> > > > I'm using JBossDrools in my company and I have some problems with
> > > DSL.
> > > >
> > > > Actually, I would like to write something like this :
> > > >
> > > > There is a Cheese with
> > > >        ( - age is less
> > > > than 42
> > > >                 or
> > > >         -  age is more than 60 )
> > > >        - type is
> > > > 'stilton'
> > > >
> > > > Unfortunately, It's the drools parser which manage "-" char.
> > > >
> > > > Also this previous synthax don't work in the LHS.
> > > >
> > > > Anyone could help me to do an equivalent condition in my DSL ? If
> > > > possible with "-" sugar char.
> > > >
> > > > Stephane.
> > > >
> > > > PS : Sorry, for my very bad english.
> > > >
> > > >
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> > > >
> > > >
> > >
> > >
> > >
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> > >
> >
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> >
>
>
> --
>   Edson Tirelli
>   Software Engineer - JBoss Rules Core Developer
>   Office: +55 11 3529-6000
>   Mobile: +55 11 9287-5646
>   JBoss, a division of Red Hat @ www.jboss.com
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