Re: [rules-users] ClassCastException when comparing date type with literal
Let me rephrase my question:
As date is an attribute of message, why don't you use:
$msg : Message( date > "...")
Constraining an attribute of Message in the Order pattern seems a weird
thing to do.
Zeke-3 wrote
It seems not work.
When I try
*$msg : Message($date : date)
Order ( $date > "Mar-01-2012" )*
I meet error "Unable to create Field Extractor for '$date' of
'[ClassObjectType class=org.drools.examples.HelloWorldExample$Second]' in
rule 'default' : [Rule name=default, agendaGroup=MAIN, salience=0,
no-loop=false]"
When I try
*$msg : Message($date : date)
eval ( $date > "Mar-01-2012" )*
If the dialect is "java", I meet error "Rule Compilation error : [Rule
name=default, agendaGroup=MAIN, salience=0, no-loop=false]
org/drools/examples/test/Rule_default_0.java (8:354) : The operator >
is undefined for the argument type(s) Date, String"
If the dialect is "mvel", I meet the same ClassCastException.
On 29 March 2012 22:28, FrankVhh <frank.vanhoenshoven@> wrote:
> This may sound a bit rude, but... why would you want to do such a thing?
>
> If there is a constraint on the message, then why not put that constraint
> in
> the message structure?
>
> Btw, I think it would work by using eval($date < "...") but see no use
> for
> it either.
>
>
> Joe Zendle wrote
> >
> > did you try:
> >
> > *$msg : Message($date : date)
> > Order ( $date > "Mar-01-2012" )*
> >
> >
> >
> > 2012/3/29 Zeke <xanadu860122@>
> >
> >> Hi, guys:
> >> I meet a strange issue and need your help again... I am using Drools
> >> 4.0.7.
> >> When my rule condition is as *Message( date > "Mar-01-2012"
)*,
> >> everything is OK. But if I change it to be as below:
> >> *$msg : Message()
> >> Order ( $msg.date > "Mar-01-2012" )*
> >> I will meet "java.lang.String cannot be cast to java.util.Date"
> >> ClassCastException. "Order" is another fact. I attach the
exception
> call
> >> stack. Please check it. It looks like a bug to me. Do we fix it in
> later
> >> release? If so, can you tell me which release contains the fix?
> Thanks!
> >>
> >> _______________________________________________
> >> rules-users mailing list
> >> rules-users@.jboss
> >> https://lists.jboss.org/mailman/listinfo/rules-users
> >>
> >>
> >
> > _______________________________________________
> > rules-users mailing list
> > rules-users@.jboss
> > https://lists.jboss.org/mailman/listinfo/rules-users
> >
>
>
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