[rules-users] Drools 5.0 concat string in matches of regular expression

[Edson Tirelli]

   The error message you reported means that MVEL could not properly parse
this expression:

".*@" + blacklistItemValue + ".*"

   What is obviously strange, but that is what the error message says.

   Quick try is: download and replace the mvel jar you have (should be mvel
version 2.0.10) by the newest one from here (2.0.15):

http://mvel.codehaus.org/Downloading+MVEL

   I did not tested the new mvel for regressions, but you might get lucky.
Otherwise, please open a jira against Drools adding your test case and we
will make sure it gets fixed and updated.

   Thanks,
        Edson

2010/1/14 Lukas Svoboda <lukasvoboda at googlemail.com>

>
> I'm not sure whether mvel version matters for compilation of drools, anyway
> I'm using mvel2.jar distributed in drools5.0.1-binaries.
>
> I'm more suspicious whether it's related to compiler since it requires
> eclipse jdt (I'm using org.eclipse.jdt.core_3.4.2.v_883_R34x.jar) unlike
> drools 4.0.7 I was using originally.
>
> Do I have to setup somehow KnowledgeBuilder by creating custom
> KnowledgeBuilderConfiguration.
>
> I assume default is java dialect with Eclipse compiler. Is it right?
>
> Lukas
>
>
>
> Edson Tirelli-4 wrote:
> >
> >    What version of MVEL are you using?
> >
> >    Edson
> >
> > 2010/1/13 Lukas Svoboda <lukasvoboda at googlemail.com>
> >
> >>
> >> I'm getting some generic not-anything-saying error message:
> >>     [java] Unable to determine the used declarations.
> >>     [java] unexpected symbol ' ' : [Rule name='BL: Block mail domain']
> >>
> >> When I remove that concatenated matches expression (".*@" +
> >> blacklistItemValue + ".*") it compiles.
> >>
> >> Complete rule looks like:
> >> rule "BL: Block mail domain" ruleflow-group "black-list"
> >> salience 1001
> >>        when
> >>                not RejectionResult();
> >>
> >>                customer : CustomerPartyDRL();
> >>                blackList: BlacklistDRL();
> >>
> >>                onBlackList : ArrayList( size > 0 )
> >>               from collect( BlacklistItemDRL( blacklistItemType matches
> >> "MAIL_DOMAIN" &&
> >> customer.currentContactInformation.partyEmailAddress.email
> >> matches blacklistItemValue )
> >>                             from blackList.getItems())
> >>         then
> >>                auditLogger.addDeclineRule( "BL: Block mail domain " +
> >>
> >>
> >>
> customer.getCurrentContactInformation().getPartyEmailAddress().getEmailLowercase());
> >>
> >>                RejectionResult rejection = new OrderRejectionResult( );
> >>                rejection.setMessage("BL: Block mail domain " +
> >>
> >>
> >>
> customer.getCurrentContactInformation().getPartyEmailAddress().getEmailLowercase());
> >>
> >>                insert( rejection  );
> >>
> >> end
> >>
> >>
> >> And fragment of the code I'm using to compile rule package is:
> >>
> >>                Reader testSource = new
> >>
> >>
> InputStreamReader(RuleCompiler.class.getResourceAsStream("/perthTestRule.drl"));
> >>                Reader sourceFlow = new
> >>
> >>
> InputStreamReader(RuleCompiler.class.getResourceAsStream("/perthScoreCustomerFlow.rf"));
> >>
> >>                // add the package to a rulebase (deploy the rule
> >> package).
> >>                KnowledgeBase kbase =
> >> KnowledgeBaseFactory.newKnowledgeBase();
> >>                KnowledgeBuilder kbuilder =
> >> KnowledgeBuilderFactory.newKnowledgeBuilder();
> >>
> >>
> >> kbuilder.add(ResourceFactory.newReaderResource(testSource),
> >> ResourceType.DRL);
> >>
> >> kbuilder.add(ResourceFactory.newReaderResource(sourceFlow),
> >> ResourceType.DRF);
> >>
> >>                System.out.println(kbuilder.getErrors().toString());
> >>
> >>                Collection<KnowledgePackage> pkgs =
> >> kbuilder.getKnowledgePackages();
> >>
> >>                try {
> >>                        kbase.addKnowledgePackages(pkgs);
> >>
> >>                        StatefulKnowledgeSession ksession =
> >> kbase.newStatefulKnowledgeSession();
> >>
> >>                        System.out.println("Knowladge session
> >> initialized...");
> >>                } catch (Exception e) {
> >>                        e.printStackTrace();
> >>                 }
> >>
> >>
> >> Edson Tirelli-4 wrote:
> >> >
> >> >    It should work... what error do you see?
> >> >
> >> >    Edson
> >> >
> >> > 2010/1/13 Lukas Svoboda <lukasvoboda at googlemail.com>
> >> >
> >> >>
> >> >> How can I get drools 5.0.1 compiled if I have regular expression
> >> matches
> >> >> part
> >> >> concat from static text + dynamic string?
> >> >>
> >> >> See example:
> >> >>                onBlackList : ArrayList( size > 0 )
> >> >>               from collect( BlacklistItemDRL( blacklistItemType
> >> matches
> >> >> "MAIL_DOMAIN" &&
> >> >> customer.currentContactInformation.partyEmailAddress.email
> >> >> matches (".*@" + blacklistItemValue + ".*") )
> >> >>                             from blackList.getItems())
> >> >>
> >> >>
> >> >> Problem is when I'm trying to do email matches (".*@" +
> >> >> blacklistItemValue
> >> >> +
> >> >> ".*"), which worked in drools 4.0.7 but can't be compiled now in
> 5.0.1
> >> >>
> >> >> Is there any way how to use in matches part of reg exp dynamic
> >> property
> >> >> value plus static string?
> >> >>
> >> >> Thanks,
> >> >> Lukas
> >> >> --
> >> >> View this message in context:
> >> >>
> >>
> http://n3.nabble.com/Drools-5-0-concat-string-in-matches-of-regular-expression-tp119197p119197.html
> >> >> Sent from the Drools - User mailing list archive at Nabble.com.
> >> >> _______________________________________________
> >> >> rules-users mailing list
> >> >> rules-users at lists.jboss.org
> >> >> https://lists.jboss.org/mailman/listinfo/rules-users
> >> >>
> >> >
> >> >
> >> >
> >> > --
> >> >  Edson Tirelli
> >> >  JBoss Drools Core Development
> >> >  JBoss by Red Hat @ www.jboss.com
> >> >
> >> > _______________________________________________
> >> > rules-users mailing list
> >> > rules-users at lists.jboss.org
> >> > https://lists.jboss.org/mailman/listinfo/rules-users
> >> >
> >> >
> >>
> >> --
> >> View this message in context:
> >>
> http://n3.nabble.com/Drools-5-0-concat-string-in-matches-of-regular-expression-tp119197p119353.html
> >> Sent from the Drools - User mailing list archive at Nabble.com.
> >> _______________________________________________
> >> rules-users mailing list
> >> rules-users at lists.jboss.org
> >> https://lists.jboss.org/mailman/listinfo/rules-users
> >>
> >
> >
> >
> > --
> >  Edson Tirelli
> >  JBoss Drools Core Development
> >  JBoss by Red Hat @ www.jboss.com
> >
> > _______________________________________________
> > rules-users mailing list
> > rules-users at lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/rules-users
> >
> >
>
> --
> View this message in context:
> http://n3.nabble.com/Drools-5-0-concat-string-in-matches-of-regular-expression-tp119197p120451.html
> Sent from the Drools - User mailing list archive at Nabble.com.
> _______________________________________________
> rules-users mailing list
> rules-users at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>



-- 
 Edson Tirelli
 JBoss Drools Core Development
 JBoss by Red Hat @ www.jboss.com
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