[rules-users] RE: rules-users Digest, Vol 8, Issue 1
Mark Proctor
mproctor at codehaus.org
Mon Jul 2 07:50:52 EDT 2007
eval cannot be indexed and a join must happen before it can be
evaluated, so its a little slower - but there are cases where you can't
avoid using it.
Mark
Rajesh_Kumar wrote:
> hi Mark,
>
> Could you please provide us the reasons , why you have written
> "eval is evil" in rule writing guidelines.I want to use it in my rules.
>
> Regards
> Rajesh Choudhary.
>
>
>
> -----Original Message-----
> From: rules-users-bounces at lists.jboss.org
> [mailto:rules-users-bounces at lists.jboss.org] On Behalf Of
> rules-users-request at lists.jboss.org
> Sent: Sunday, July 01, 2007 9:30 PM
> To: rules-users at lists.jboss.org
> Subject: rules-users Digest, Vol 8, Issue 1
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> Today's Topics:
>
> 1. Re: Unexpected token "." in primary - Rule Compilation
> Error
> (McShiv)
> 2. Help with MR3 (s erel)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sat, 30 Jun 2007 15:05:19 -0700 (PDT)
> From: McShiv <rajesh_sachin10 at yahoo.co.in>
> Subject: Re: [rules-users] Unexpected token "." in primary - Rule
> Compilation Error
> To: rules-users at lists.jboss.org
> Message-ID: <11377473.post at talk.nabble.com>
> Content-Type: text/plain; charset=us-ascii
>
>
> Hi Michael,
>
> What is vanilla DRL? Can you briefly explain about it?
>
> Thanks,
> McShiv
>
> Michael Neale wrote:
>
>> hmm.. there is a problem with the action of the 2nd rule, so,
>>
> converting
>
>> it
>> to vanilla DRL:
>>
>> rule "SpeCodeSpeValProdPlan12"
>> salience 50
>>
>> when
>> ...
>> then
>> if(common.getProd() == "{prodCode1}" || common.getPlan() ==
>> "{planCode1}"){System.out.println("Error");}
>> end
>>
>> That doesn't look quite right - you are doing == on strings - .equals
>> would
>> be better). I would try that rule on its own, without a DSL - to see
>>
> what
>
>> is
>> causing it. Also - why are you doing the if on the RHS? I would get
>>
> rid of
>
>> that if at all possible to save confusion later.
>>
>> On 6/30/07, McShiv <rajesh_sachin10 at yahoo.co.in> wrote:
>>
>>> DRL Syntax
>>> package com.policy;
>>> expander SpeCodeSpeValProdPlan.dsl;
>>> #list any import classes here.
>>> import com.viking.common.transferbeans.CommonInformation;
>>> import com.sentry.common.entitybeans.EntityBean;
>>> import com.sentry.common.entitybeans.Selected;
>>> import java.util.ArrayList;
>>> import java.util.List;
>>> #declare any global variables here
>>>
>>> rule "SpeCodeSpeValProdPlan11"
>>> salience 100
>>>
>>> when
>>> The EntityBean Contains Selected List
>>> then
>>> Assert All The Selected
>>> end
>>>
>>> rule "SpeCodeSpeValProdPlan12"
>>> salience 50
>>>
>>> when
>>> The Question Code Is "License" And The Selected Value is "Y"
>>> then
>>> Remove The Product "09" And Plan "CD"
>>> end
>>>
>>> DSL Syntax:
>>>
>>> [when] The EntityBean Contains Selected List = entity : EntityBean();
>>> eval(entity.getSelected() != null);
>>> [then] Assert All The Selected = Object[] quoSelList =
>>>
> entity.getSelected
>
>>> ();
>>> for(int i = 0; i < quoSelList.length; i++){ Selected queSel =
>>> (Selected)quoSelList[i]; assert(queSel); System.out.println(queSel);
>>>
> }
>
>>> [when] The Question Code Is "{speCode1}" And The Selected Value is
>>> "{speValue1}" = common : CommonInformation();
>>>
> Selected(stateSpecificCode
>
>>> ==
>>> "{speCode1}", stateSpecificValue == "{speValue1}");
>>> [then] Remove The Product "{prodCode1}" And Plan "{planCode1}" =
>>> if(common.getProd() == "{prodCode1}" || common.getPlan() ==
>>> "{planCode1}"){System.out.println("Error");}
>>>
>>>
>>> The Selected Class is an Object Array inside EntityBean Class.
>>> CommonInformation is a seperate class. CommonInformation & EntityBean
>>> will
>>> be available in Working Memory(asserted earlier in java class).
>>>
>>> I need to remove the Selected Classes in the Object array and assert
>>>
> into
>
>>> the working memory. Thats what I am doing in the First Rule.
>>>
>>> In the Second rule I check for some condition and print the error
>>> according
>>> to the condition.
>>> Thanks,
>>> McShiv
>>>
>>> Fernando Meyer Camargo wrote:
>>>
>>>> howdy,
>>>>
>>>> is your package name right? please paste your rule code.
>>>>
>>>> Fernando Meyer
>>>> fmcamargo at gmail.com
>>>> GPG: 5A6D 3374 B055 A513 9A02 A03B 3DB3 7485 D804 DDFB
>>>>
>>>>
>>>> On Jun 29, 2007, at 10:16 PM, McShiv wrote:
>>>>
>>>>
>>>>> com.package.FatalSystemException
>>>>> at org.drools.rule.Package.checkValidity(Unknown Source)
>>>>> at org.drools.reteoo.RuleBaseImpl.addPackage(Unknown Source)
>>>>> at
>>>>> com.sentry.underwriting.ruleexecutor.DroolsExecutor.executeRules
>>>>> (DroolsExecutor.java)
>>>>> at
>>>>>
>>>>>
> com.sentry.underwriting.ruleexecutor.RulesExecutionProcessor.callRules
>
>>>>> Executor(RulesExecutionProcessor.java:82)
>>>>> at
>>>>>
>>>>>
> com.sentry.underwriting.ruleexecutor.RulesExecutionProcessor.rulesExec
>
>>>>> utionprocess(RulesExecutionProcessor.java:65)
>>>>> at
>>>>> com.sentry.underwriting.ruleprocessor.RulesProcessor.processRules
>>>>> (RulesProcessor.java)
>>>>> at
>>>>> com.sentry.underwriting.test.UnderwritingDemo.main
>>>>> (UnderwritingDemo.java:21)
>>>>> Caused by: org.drools.rule.InvalidRulePackage: Rule Compilation
>>>>> error File
>>>>> com/policy/Rule_SpeCodeSpeValProdPlan12_0.java, Line 12, Column
>>>>>
> 176:
>
>>>>> Unexpected token "." in primary
>>>>>
>>>>> ... 7 more
>>>>>
>>>>>
>>>>> I am using Drools 3.0.6 version.
>>>>>
>>>>> I got the above message when the drl files are added to the
>>>>> RuleBase class.
>>>>>
>>>>> I debugged the code. The error was thrown when
>>>>> ruleBase.addPackage(packageBuilder.getPackage()); line was called
>>>>> in the
>>>>> DroolsExecutor class.
>>>>>
>>>>> Can anyone please suggest me any sollution for this problem.
>>>>>
>>>>> Thanks in addvance.
>>>>>
>>>>> Thanks,
>>>>> McShiv.
>>>>> --
>>>>> View this message in context: http://www.nabble.com/Unexpected-
>>>>> token-%22.%22-in-primary---Rule-Compilation-Error-
>>>>> tf4002948.html#a11369488
>>>>> Sent from the drools - user mailing list archive at Nabble.com.
>>>>>
>>>>> _______________________________________________
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>>>>> rules-users at lists.jboss.org
>>>>> https://lists.jboss.org/mailman/listinfo/rules-users
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>>> --
>>> View this message in context:
>>>
>>>
> http://www.nabble.com/Unexpected-token-%22.%22-in-primary---Rule-Compila
> tion-Error-tf4002948.html#a11369670
>
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>>>
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