[rules-users] RE: rules-users Digest, Vol 11, Issue 35

Fri Oct 5 14:27:49 EDT 2007

If you think this is a bug open a jira with a self contained test 
showing the problem

Mark
prateek.katiyar at wipro.com wrote:
>
> ------------------------------------------------------------------------
>
> Subject:
> RE: rules-users Digest, Vol 11, Issue 35
> From:
> <prateek.katiyar at wipro.com>
> Date:
> Fri, 5 Oct 2007 09:52:26 +0530
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>
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> rules-users Digest, Vol 11, Issue 35
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> AcgGnOVGQFiEYv1pQ0q0oQgo6ESFtQAaBcdz
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>
> Hi Mark
> Thank for your reply.
>  
> When i tried with the rule file(.drl format) then also i faced the same problem.
> Actually the problem is that when the function returns "true", the program works fine.
> But when the function returns "false",it gives the exception :
> java.lang.NullPointerException
>
> at org.drools.common.DefaultAgenda.getNextFocus(Unknown Source)
>
> at org.drools.common.DefaultAgenda.fireNextItem(Unknown Source)
>
> at org.drools.common.AbstractWorkingMemory.fireAllRules(Unknown Source)
>
> at org.drools.common.AbstractWorkingMemory.fireAllRules(Unknown Source)
>
> at com.wipro.loan.validation.bean.Final.main(Final.java:41)
>
> I also tried with a additional rule of "MAIN" agenda-group but still it is giving the same problem.
> My additional rule was :
> rule "impossible"
>
> agenda-group "MAIN"
>
> when
>
> eval(false)
>
> then
>
> System.out.println("The impossible rule has fired");
>
> end 
>
> I am sending my program in the attachment.
> Now please give me the proper advice.
> Have a great day.
>  
> With Regards
> Prateek Katiyar
>
> ________________________________
>
> From: rules-users-bounces at lists.jboss.org on behalf of rules-users-request at lists.jboss.org
> Sent: Thu 10/4/2007 9:01 PM
> To: rules-users at lists.jboss.org
> Subject: rules-users Digest, Vol 11, Issue 35
>
>
>
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> Today's Topics:
>
>    1. Re: Migration 3 to 4 (replace "->") (Edson Tirelli)
>    2. Re: BRMS - how to use variables on Action part? (Shahad Ahmed)
>    3. Re: BRMS Guided Editor w/ variable binding (Shahad Ahmed)
>    4. Re: Fucntion call in rule (Mark Proctor)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 4 Oct 2007 12:10:10 -0300
> From: "Edson Tirelli" <tirelli at post.com>
> Subject: Re: [rules-users] Migration 3 to 4 (replace "->")
> To: "Rules Users List" <rules-users at lists.jboss.org>
> Message-ID:
>         <e6dd5ba30710040810l37cee366y4b91c074b386e4f8 at mail.gmail.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
>      Markus,
>
>      We do support "->" in Drools 4.0 for backward compatibility, but we do
> advise you to not use anymore, since we will drop support to it sometime in
> the future. The alternative is simply to use an in-line eval:
>
> BlaBlub( number : id, eval( BlaClass.staticFunction( number ) ) )
>
>    Also, we now have auto-vivification of attributes, so you don't need to
> bind "id" anymore, if you will only use it inside the eval:
>
> BlaBlub( eval( BlaClass.staticFunction( id ) ) )
>
>    I don't know if it was a typo in your e-mail, but you are missing a ")"
> in the end of the line of your mapping:
>
> [when]ist BlaBlub=BlaBlub(number : id -> ( BlaClass.staticFunction(number ))
> )
>     Hope it helps.
>
>       Edson
>
>
> 2007/10/4, Markus Helbig <mhelbig81 at googlemail.com>:
>   
>>    In Drools 3 i used the following code (in a DSL file):
>>
>>    [when]ist BlaBlub=BlaBlub(number : id -> ( BlaClass.staticFunction(
>>    number ))
>>
>>    where id can be resolved be method getId in class BlaBlub and
>>    staticFunction ist a public static function in a helper class.
>>
>>    Drools 4 doesn't allow me this construct, how should this be
>>    migrated?
>>
>>    Any help is much appreciated
>>
>>    Cheers
>>
>>    Markus
>>
>>
>> _______________________________________________
>> rules-users mailing list
>> rules-users at lists.jboss.org
>> https://lists.jboss.org/mailman/listinfo/rules-users
>>
>>
>>     
>
>
> --
>   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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> ------------------------------
>
> Message: 2
> Date: Thu, 4 Oct 2007 16:17:36 +0100
> From: "Shahad Ahmed" <shahad.ahmed2 at gmail.com>
> Subject: Re: [rules-users] BRMS - how to use variables on Action part?
> To: "Rules Users List" <rules-users at lists.jboss.org>
> Message-ID:
>         <1d2fdded0710040817r14f9ee41o2e045bda56a84647 at mail.gmail.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hi Felipe,
>
> When you define your LHS in the BRMS, there is an option to assign a
> variable to the expression. In the When part, there should be a little green
> triangle beside Person. Click on this to get a dialog called "Modify
> constraints for Person". At the bottom of this dialog is an option to set a
> variable name to bind to Person. Type p, or whatever you want into the text
> box and then click the Set button beside the text box. You should now have a
> LHS constraint of the form p:Person(...). Now create a Then action by
> clicking the + at the RHS of the Then part. A dialog will appear called "Add
> a new action". The first two option allows you to pick the variable p you
> just created - you probably want the second option of "modify a fact" as you
> want to call update(p) after modifying p. You should now see something like
> Set [p] in the Then part. Click on the Green triangle above Set [p] and you
> will get a dialog called "Add a field" with a list of the fields in the
> Person class. Choose the one you want to set (approvedMount?). What this
> does is actually call the method called setApprovedMount (Press View Source
> button to see). The Set action should now have a text box where you can
> enter the parameter $income * 1.2.
>
> I've had a look at the source code for this functionality and it only allows
> Setter methods to be called - unfortunately you cannot call any other
> methods on Person.
>
> Regards
> Shahad
>
>
>
> On 10/3/07, Felipe Piccolini <felipe.piccolini at bluesoft.cl> wrote:
>   
>>  Ok, so to fit on the "not ignored emails" from the list Mark posted, I
>> changed the title. However I following in the list
>> anyways beacuse Im resending this email in less than 3 days.
>>
>>
>> Note: Im not desperate, nor this is for today. This just came out today
>> yesterday and well... its important to me, but I
>> think I can get a work around for now.
>>
>>
>> So here is the real on-topic question.
>> -----------------
>> Anyone knows how to use variables (from fields) setted on LHS, to modify a
>> field on the RHS using the GUI editor
>> from BRMS?
>>
>>
>> What I need is to write this rule on BRMS.
>>
>>
>> rule "Set approvedMount for a women"
>> no-loop true
>> when
>> $p: Person($sex: sex == "F", $income: incomeMount)
>> then
>> $p.setApprovedMount($income * 1.2);
>> update($p);
>> end
>>
>>
>> I know I can use formulas, but I only know how to set those on LHS, I dont
>> know how to put a formula on RHS (setter of the field to modify).
>>
>>
>> Thanks.
>>
>>
>> *Felipe Piccolini M.*
>> felipe.piccolini at bluesoft.cl
>>
>>
>>
>>
>>
>>
>>
>>
>> _______________________________________________
>> rules-users mailing list
>> rules-users at lists.jboss.org
>> https://lists.jboss.org/mailman/listinfo/rules-users
>>
>>
>>     
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> ------------------------------
>
> Message: 3
> Date: Thu, 4 Oct 2007 16:29:56 +0100
> From: "Shahad Ahmed" <shahad.ahmed2 at gmail.com>
> Subject: Re: [rules-users] BRMS Guided Editor w/ variable binding
> To: "Rules Users List" <rules-users at lists.jboss.org>
> Message-ID:
>         <1d2fdded0710040829t5b2c4e54n3efe8d37faab12f9 at mail.gmail.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Mat,
>
> The option of binding and setting variables is already available in 4.0.1 GA
> release of the BRMS. I've just replied to a similar post. Suppose you've
> already defined some "when" constraint on an object of type Person and you
> want to set the attribute name in the Then part:
>
>  When you define your When in the BRMS, there is an option to assign a
> variable to the expression. In the When part, there should be a little green
> triangle beside Person. Click on this to get a dialog called "Modify
> constraints for Person". At the bottom of this dialog is an option to set a
> variable name to bind to Person. Type p, or whatever you want into the text
> box and then click the Set button beside the text box. You should now have a
> When constraint of the form p:Person(...). Now create a Then action by
> clicking the + at the RHS of the Then part. A dialog will appear called "Add
> a new action". The first two options allows you to pick the variable p you
> just created - choose the second option if you want to update p into the
> Working memory after modifying it. You should now see something like Set [p]
> in the Then part. Click on the Green triangle above Set [p] and you will get
> a dialog called "Add a field" with a list of the fields in the Person class.
> Choose the one you want to set (e.g. name). What this does is actually call
> the method called setName (Press View Source button to see). The Set action
> should now have a text box where you can enter the name parameter
>
> Regards
> Shahad
>
>
>
> On 10/3/07, Drouin.Mathieu <Mathieu.Drouin at cic.gc.ca> wrote:
>   
>> Ok, I've read the rules, seems like I was infringing on #11. I might be
>> violating #3 by sending this one though :)
>>
>> https://hudson.jboss.org/hudson/job/drools/lastSuccessfulBuild/artifact/
>> trunk/target/docs/shared/images/Chapter-Examples/BRMS_Guided.png
>>
>> Is the guided editor with variable binding (shown above) going to be
>> available in v.4.0.2? If not, is it possible to achieve a similar result
>> without the help of DSL?
>>
>> Thanks,
>>
>> Mat
>>
>>
>>
>>
>>
>>
>>
>> _______________________________________________
>> rules-users mailing list
>> rules-users at lists.jboss.org
>> https://lists.jboss.org/mailman/listinfo/rules-users
>>
>>     
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> ------------------------------
>
> Message: 4
> Date: Thu, 04 Oct 2007 16:30:40 +0100
> From: Mark Proctor <mproctor at codehaus.org>
> Subject: Re: [rules-users] Fucntion call in rule
> To: Rules Users List <rules-users at lists.jboss.org>
> Message-ID: <47050720.90803 at codehaus.org>
> Content-Type: text/plain; charset="iso-8859-1"
>
> As always with XML. First do it in DRL, when that works us the XMLDumper
> to get the working XML out. This should provide you everything you know.
>
> Mark
> prateek.katiyar at wipro.com wrote:
>   
>> Hi
>> I wrote a function in my rule file *"boolean test(String name)" *and
>> when i use this function in the <lhs></lhs>
>> part of one of my rule it's giving me the following error:
>>
>>
>> org.drools.rule.InvalidRulePackage: Rule Compilation error The method
>> test(String) is undefined for the type Rule_validateFullName_0
>>
>> at org.drools.rule.Package.checkValidity(Unknown Source)
>>
>> at org.drools.common.AbstractRuleBase.addPackage(Unknown Source)
>>
>> at com.wipro.loan.validation.bean.Final.readRule(_Final.java:75_)
>>
>> at com.wipro.loan.validation.bean.Final.main(_Final.java:28_)
>>
>> now i want to know that how can i pass the return value of a method of
>> a bean class as a argument of  *"boolean test(String name)"*  method.
>>
>> I am sending the source files in the attachment.
>>
>> Please help me.
>>
>> /*With Regards*/
>> /*Prateek*//**/
>>
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>>     
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