RE: [rules-users] How to use not operator in drool.
Hi Edson Thanks for your reply. I guess we'll try and code in a work around for now. It would be great to have this feature though! :-) I've created a feature request in Jira. http://jira.jboss.com/jira/browse/JBRULES-1199 Regards, _ Arsalan Zaidi / Capgemini - India (FS SBU) / Mumbai Technical Architect Mobile Phone: +91 - 9892 8970 03 / www.capgemini.com http://www.capgemini.com/ Together: the Collaborative Business Experience _ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Edson Tirelli Sent: 14 September 2007 18:42 To: Rules Users List Subject: Re: [rules-users] How to use not operator in drool. Arsalan, Unfortunately Drools does not have a field constraint negation operator, mostly because when writing rules, it was not needed, since you can always negate the constraint itself. Although, I understand a agree with your use case. My suggestion is for you to open a JIRA feature request and we will include that as soon as possible in the product. Although, meanwhile, the only workaround I can see for your case is to translate the expression you are using directly into a java or mvel expression and write it inside an in-line eval. []s Edson 2007/9/14, Arsalan S. Zaidi [EMAIL PROTECTED]: Hi I'll try to explain the situation that Gaurav finds himself in. We're working on this problem together and so far, we haven't been able to crack it. We're using drools to handle the business rules for an application. The rules however, are not provided to us in a .drl file, rather, we get an XLS sheet from the analysts with rules in a different grammar. We're using ANTLR to read and parse these rules to generate the drools rules programmatically. However, we're running into problems with NOT. The input rules (in the non-drools business language) have a NOT operator which works like '!' in Java. It flips the Boolean around, so to speak. So: NOT((some sub expression which evaluates to TRUE)) == FALSE MVEL doesn't seem to support this. So how do we simulate it? If it were only being used with NOT IN, we could manage, but its use is completely arbitrary. Changes to the input rules or to the input rules grammar have been (ha ha) ruled out. Any help would be appreciated. Regards, _ Arsalan Zaidi / Capgemini - India (FS SBU) / Mumbai Technical Architect Mobile Phone: +91 - 9892 8970 03 / www.capgemini.com http://www.capgemini.com/ Together: the Collaborative Business Experience _ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Anstis, Michael (M.) Sent: 13 September 2007 13:31 To: Rules Users List Subject: RE: [rules-users] How to use not operator in drool. What dialect do your rules use? You could also simplify the logic using DeMorgans Theorem (which might be troublesome to accomplish programmatically) I don't know whether your example is flawed as the brackets don't match, but assuming you mean something like this:- (NOT (G13.1 IN (1,2,3) OR (G250.8 = Y))) You can re-write this as (G13.1NOT IN (1,2,3) AND G250.8 != Y) With kind regards, Mike From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of JOSHI, GAURAV Sent: 13 September 2007 08:20 To: Rules Users List Subject: RE: [rules-users] How to use not operator in drool. Thank's for your sugession of using not in instead of not but my problem is that not can also come without in. Actually I am making a generator of rule file from expression like ((NOT (ENDS WITH (G10.2, ,))) ((NOT (G13.1 IN (1,2,3))) OR (G250.8 = Y))) Where G13.2, G250.8, G10.2 are variables coming from a map inserted in working memory. I am accessing these variables from map. My rules are as follows This rule is working fine. rule Editable_G10.3 when ((Map( this[G10.3] !=8))||(Map( this[G10.2] ==19))) then System.out.println(comming here-); End This is not working rule Mandatory_G10.3 when (not((Map( this[G10.3] !=8))||(Map( this[G10.2] ==19 Then System.out.println(comming here-); End In also tried following approaches: 1) eval(not((Map( this[G10.3] !=8))||(Map( this[G10.2] ==19 2) eval(!((Map
RE: [rules-users] How to use not operator in drool.
Hi I'll try to explain the situation that Gaurav finds himself in. We're working on this problem together and so far, we haven't been able to crack it. We're using drools to handle the business rules for an application. The rules however, are not provided to us in a .drl file, rather, we get an XLS sheet from the analysts with rules in a different grammar. We're using ANTLR to read and parse these rules to generate the drools rules programmatically. However, we're running into problems with NOT. The input rules (in the non-drools business language) have a NOT operator which works like '!' in Java. It flips the Boolean around, so to speak. So: NOT((some sub expression which evaluates to TRUE)) == FALSE MVEL doesn't seem to support this. So how do we simulate it? If it were only being used with NOT IN, we could manage, but its use is completely arbitrary. Changes to the input rules or to the input rules grammar have been (ha ha) ruled out. Any help would be appreciated. Regards, _ Arsalan Zaidi / Capgemini - India (FS SBU) / Mumbai Technical Architect Mobile Phone: +91 - 9892 8970 03 / www.capgemini.com http://www.capgemini.com/ Together: the Collaborative Business Experience _ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Anstis, Michael (M.) Sent: 13 September 2007 13:31 To: Rules Users List Subject: RE: [rules-users] How to use not operator in drool. What dialect do your rules use? You could also simplify the logic using DeMorgans Theorem (which might be troublesome to accomplish programmatically) I don't know whether your example is flawed as the brackets don't match, but assuming you mean something like this:- (NOT (G13.1 IN (1,2,3) OR (G250.8 = Y))) You can re-write this as (G13.1NOT IN (1,2,3) AND G250.8 != Y) With kind regards, Mike From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of JOSHI, GAURAV Sent: 13 September 2007 08:20 To: Rules Users List Subject: RE: [rules-users] How to use not operator in drool. Thank's for your sugession of using not in instead of not but my problem is that not can also come without in. Actually I am making a generator of rule file from expression like ((NOT (ENDS WITH (G10.2, ,))) ((NOT (G13.1 IN (1,2,3))) OR (G250.8 = Y))) Where G13.2, G250.8, G10.2 are variables coming from a map inserted in working memory. I am accessing these variables from map. My rules are as follows This rule is working fine. rule Editable_G10.3 when ((Map( this[G10.3] !=8))||(Map( this[G10.2] ==19))) then System.out.println(comming here-); End This is not working rule Mandatory_G10.3 when (not((Map( this[G10.3] !=8))||(Map( this[G10.2] ==19 Then System.out.println(comming here-); End In also tried following approaches: 1) eval(not((Map( this[G10.3] !=8))||(Map( this[G10.2] ==19 2) eval(!((Map( this[G10.3] !=8))||(Map( this[G10.2] ==19 But in both cases it is giving same error: org.drools.rule.InvalidRulePackage: Rule Compilation error : [Rule name=ValidationRuleExp_G10.3, agendaGroup=MAIN, salience=0, no-loop=false] com/telekurs/nva/mde/fe/ak/validation/Rule_ValidationRuleExp_G10_3_0.jav a (11:495) : Cannot use this in a static context com/telekurs/nva/mde/fe/ak/validation/Rule_ValidationRuleExp_G10_3_0.jav a (11:500) : Type mismatch: cannot convert from String to int I am trying to find out some general concept so that I can change just achieve the functionality of not. Thanks Gaurav From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Edson Tirelli Sent: Wednesday, September 12, 2007 10:20 PM To: Rules Users List Subject: Re: [rules-users] How to use not operator in drool. Remove your eval and use or instead of || for the OR CE. Although, I feel that this is not what you want... what you want is simply: when Map( this['city'] not in ( mumbai, delhi ) ) then //... end []s Edson 2007/9/12, Gaurav2007 [EMAIL PROTECTED]: Hi
RE: [rules-users] Dynamic changes to drl file
Hi. I'm no expert, but I think you have to 'recompile' the drl file using PackageBuilder if you change it on disk and wish to use the new version. --Arsalan -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of pns77 Sent: 23 August 2007 18:48 To: rules-users@lists.jboss.org Subject: [rules-users] Dynamic changes to drl file Have been stuck with this for quite some time now. Would appreciate if anyone could help me out. I was checking if changes could be made to the rule file at runtime and the following is the block of code that i tried RuleBase ruleBase = readRule(); WorkingMemory workingMemory = ruleBase.newStatefulSession(false); // to keep reference // Create a message object workingMemory.insert( message ); workingMemory.fireAllRules(); When i try chaning the drl file at run time the change doesnt get reflected. Is there anything else i need to be doing here? Any additional jar files ? To have this change take effect at runtime - do i need to create a new session for each run or do i need to retain the session - i tried both newStatefulSession(false) and newStatefulSession() - get the same result with both. -- View this message in context: http://www.nabble.com/Dynamic-changes-to-drl-file-tf4317491.html#a122934 61 Sent from the drools - user mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users This message contains information that may be privileged or confidential and is the property of the Capgemini Group. It is intended only for the person to whom it is addressed. If you are not the intended recipient, you are not authorized to read, print, retain, copy, disseminate, distribute, or use this message or any part thereof. If you receive this message in error, please notify the sender immediately and delete all copies of this message. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] could not access property ('=')
Hi.
Jira Bug created. http://jira.jboss.com/jira/browse/JBRULES-1089
BTW, the work around works just fine.
Thanks!
--Arsalan
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Edson Tirelli
Sent: 13 August 2007 22:16
To: Rules Users List
Subject: Re: [rules-users] could not access property ('=')
This looks like an MVEL issue, since your expression is being
converted into an MVEL predicate. May I ask you please to open a JIRA
for that bug?
Meanwhile, a workaround that shall work for you and may give you
improved perf is to split your pattern into 2 patterns using the from
keyword:
when
$dto : DTO( )
W250_4_1( value in (0 ,1 ,6 ,7 ,A ,C ,D ,G
,L ,M ,P ,Q ,S ,V ,Z ) ) from $dto.w250_4_1
then
Thanks, and hope it helps.
Edson
2007/8/13, Arsalan S. Zaidi [EMAIL PROTECTED]:
Hi.
I've currently evaluating Drools 4.0 for a project of ours and I'm
running into some problems.
I have a rule which looks like this:
rule W250.42 Editable
when
DTO(w250_4_1.value in (0 ,1 ,6 ,7 ,A ,C ,D
,G ,L ,M ,P ,Q ,S ,V ,Z ) )
then
System.out.println (0 );
Action action = createAction(W250.42 , false , true );
retList.add(action);
end
both DTO and w250_4_1 are extremely simple beans. w250_4_1 just has 1
property 'value' which is a String and DTO has one property w250_4_1
which is the bean w250_4_1 .
Now when I put 0 into w250_4_1 then everything works fine. The rule is
true and the 'then' portion is executed. However, if I set w250_4_1 to
6 (which is also present in the in (...)) then I get the following
error.
org.drools.RuntimeDroolsException : Exception executing predicate
[EMAIL PROTECTED]
at
org.drools.rule.PredicateConstraint.isAllowed(PredicateConstraint.java:1
97 )
at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:122 )
at
org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(Compo
siteObjectSinkAdapter.java:317 )
at
org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:168 )
at org.drools.reteoo.Rete.assertObject(Rete.java:168 )
at org.drools.reteoo.ReteooRuleBase.assertObject(
ReteooRuleBase.java:190)
at
org.drools.reteoo.ReteooWorkingMemory.doInsert(ReteooWorkingMemory.java:
70 )
at
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.jav
a:848 )
at
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.jav
a:822 )
at
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.jav
a:623 )
at com.sample.DroolsTest.main( DroolsTest.java:34)
Caused by: org.mvel.PropertyAccessException: failed to access property:
== in: class com.sample.DTOShadowProxy
at
org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChai
n(ReflectiveAccessorOptimizer.java:137 )
at
org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.optimizeAccess
or(ReflectiveAccessorOptimizer.java:96 )
at org.mvel.ASTNode.getReducedValueAccelerated(ASTNode.java:194 )
at org.mvel.ast.Or.getReducedValueAccelerated(Or.java:18 )
at org.mvel.MVELRuntime.execute( MVELRuntime.java:87)
at org.mvel.CompiledExpression.getValue(
CompiledExpression.java:98)
at org.mvel.MVEL.executeExpression( MVEL.java:202)
at
org.drools.base.mvel.MVELPredicateExpression.evaluate(MVELPredicateExpre
ssion.java:36 )
at
org.drools.rule.PredicateConstraint.isAllowed(PredicateConstraint.java:1
91 )
... 10 more
Caused by: org.mvel.PropertyAccessException: could not access property
('=')
at
org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.getBeanPropert
y(ReflectiveAccessorOptimizer.java:252 )
at
org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChai
n(ReflectiveAccessorOptimizer.java:106 )
... 18 more
If I keep w250_4_1 as 0, but move 0 in the rule to any other place
place in the in() list (e.g. in (1,0,...), then I get a similar
error.
I get similar errors when trying to use 'not in' in the same
circumstance, except that then the property is ('!')
What seems to be the issue?
Thanks in advance!
Regards,
--Arsalan
This message contains information that may be privileged or confidential
and is the property of the Capgemini Group. It is intended only for the
person to whom it is addressed. If you are not the intended recipient,
you are not authorized to read, print, retain, copy, disseminate,
distribute, or use this message or any part thereof. If you receive this
message in error, please notify the sender immediately and delete all
copies of this message.
___
rules-users mailing list
rules-users@lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
--
Edson Tirelli
Software Engineer - JBoss Rules Core
[rules-users] could not access property ('=')
Hi.
I've currently evaluating Drools 4.0 for a project of ours and I'm
running into some problems.
I have a rule which looks like this:
rule W250.42 Editable
when
DTO(w250_4_1.value in
(0,1,6,7,A,C,D,G,L,M,P,Q,S,V,Z) )
then
System.out.println (0);
Action action = createAction(W250.42, false, true);
retList.add(action);
end
both DTO and w250_4_1 are extremely simple beans. w250_4_1 just has 1
property 'value' which is a String and DTO has one property w250_4_1
which is the bean w250_4_1.
Now when I put 0 into w250_4_1 then everything works fine. The rule is
true and the 'then' portion is executed. However, if I set w250_4_1 to
6 (which is also present in the in (...)) then I get the following
error.
org.drools.RuntimeDroolsException: Exception executing predicate
[EMAIL PROTECTED]
at
org.drools.rule.PredicateConstraint.isAllowed(PredicateConstraint.java:1
97)
at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:122)
at
org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(Compo
siteObjectSinkAdapter.java:317)
at
org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:168)
at org.drools.reteoo.Rete.assertObject(Rete.java:168)
at
org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:190)
at
org.drools.reteoo.ReteooWorkingMemory.doInsert(ReteooWorkingMemory.java:
70)
at
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.jav
a:848)
at
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.jav
a:822)
at
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.jav
a:623)
at com.sample.DroolsTest.main(DroolsTest.java:34)
Caused by: org.mvel.PropertyAccessException: failed to access property:
== in: class com.sample.DTOShadowProxy
at
org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChai
n(ReflectiveAccessorOptimizer.java:137)
at
org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.optimizeAccess
or(ReflectiveAccessorOptimizer.java:96)
at org.mvel.ASTNode.getReducedValueAccelerated(ASTNode.java:194)
at org.mvel.ast.Or.getReducedValueAccelerated(Or.java:18)
at org.mvel.MVELRuntime.execute(MVELRuntime.java:87)
at
org.mvel.CompiledExpression.getValue(CompiledExpression.java:98)
at org.mvel.MVEL.executeExpression(MVEL.java:202)
at
org.drools.base.mvel.MVELPredicateExpression.evaluate(MVELPredicateExpre
ssion.java:36)
at
org.drools.rule.PredicateConstraint.isAllowed(PredicateConstraint.java:1
91)
... 10 more
Caused by: org.mvel.PropertyAccessException: could not access property
('=')
at
org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.getBeanPropert
y(ReflectiveAccessorOptimizer.java:252)
at
org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChai
n(ReflectiveAccessorOptimizer.java:106)
... 18 more
If I keep w250_4_1 as 0, but move 0 in the rule to any other place
place in the in() list (e.g. in (1,0,...), then I get a similar
error.
I get similar errors when trying to use 'not in' in the same
circumstance, except that then the property is ('!')
What seems to be the issue?
Thanks in advance!
Regards,
--Arsalan
This message contains information that may be privileged or confidential and is
the property of the Capgemini Group. It is intended only for the person to whom
it is addressed. If you are not the intended recipient, you are not authorized
to read, print, retain, copy, disseminate, distribute, or use this message or
any part thereof. If you receive this message in error, please notify the
sender immediately and delete all copies of this message.
___
rules-users mailing list
rules-users@lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] variables in rules
Hi Mark. Thanks for the quick reply! :-) About question no. 2, is there anyway to do something like that with Drools? Regards, --Arsalan From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Mark Proctor Sent: 13 August 2007 18:03 To: Rules Users List Subject: Re: [rules-users] variables in rules yes you can use a variable, and no you cannot dynamically generate rules in an eval. Mark Arsalan S. Zaidi wrote: Hi. Two questions: 1. Is it possible to use a variable in a IN(...) ? E.g. when $someVar : SomeObj() (pqr in (abc, $someVar)) then ... 2. Can I use strings in an eval() to dynamically generate rules? E.g. when eval($aaa == 0) then ... Thanks in advance! --Arsalan This message contains information that may be privileged or confidential and is the property of the Capgemini Group. It is intended only for the person to whom it is addressed. If you are not the intended recipient, you are not authorized to read, print, retain, copy, disseminate, distribute, or use this message or any part thereof. If you receive this message in error, please notify the sender immediately and delete all copies of this message. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users This message contains information that may be privileged or confidential and is the property of the Capgemini Group. It is intended only for the person to whom it is addressed. If you are not the intended recipient, you are not authorized to read, print, retain, copy, disseminate, distribute, or use this message or any part thereof. If you receive this message in error, please notify the sender immediately and delete all copies of this message. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
