2:43 p.m.
Hi all,
I am always confused about what we can do in the "then" part of the rule.
In particular, I have problem duplicate a list. For example:
when:
$b: Book( "james" memberOf authors )
then:
Test fact = new Test();
fact.getList().addAll( $b.authors );
insert(fact);
end
The error message reads like this:
BuildError: Unable to build expression for 'consequence': [Error:
Failed to compile: 2 compilation error(s):
- (1,7) unqualified type in strict mode for: $b
- (1,12) unqualified type in strict mode for: authors]
What is the right way to do this?
Thanks.
-Simon
2:14 a.m.
On 1 June 2011 21:43, Simon Chen <simonchennj(a)gmail.com> wrote:
Hi all,
I am always confused about what we can do in the "then" part of the rule.
In particular, I have problem duplicate a list. For example:
when:
$b: Book( "james" memberOf authors )
then:
Test fact = new Test();
fact.getList().addAll( $b.authors );
insert(fact);
end
The error message reads like this:
BuildError: Unable to build expression for 'consequence': [Error:
Failed to compile: 2 compilation error(s):
- (1,7) unqualified type in strict mode for: $b
- (1,12) unqualified type in strict mode for: authors]
What is the right way to do this?
Granted - the error message is a puzzle in itself, but basically, the RHS
must be written according to Java rules. Hence, if $b is an object of type
Book, $b.authors depends on the (Java!) visibility of member authors. If it
isn't public, you must use the getter.
-W
Thanks.
-Simon
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
9:24 a.m.
2011/6/2 Wolfgang Laun <wolfgang.laun(a)gmail.com>:
On 1 June 2011 21:43, Simon Chen <simonchennj(a)gmail.com>
wrote:
>
> Hi all,
>
> I am always confused about what we can do in the "then" part of the rule.
>
> In particular, I have problem duplicate a list. For example:
>
> when:
> $b: Book( "james" memberOf authors )
> then:
> Test fact = new Test();
> fact.getList().addAll( $b.authors );
> insert(fact);
> end
>
> The error message reads like this:
>
> BuildError: Unable to build expression for 'consequence': [Error:
> Failed to compile: 2 compilation error(s):
> - (1,7) unqualified type in strict mode for: $b
> - (1,12) unqualified type in strict mode for: authors]
>
> What is the right way to do this?
Granted - the error message is a puzzle in itself, but basically, the RHS
must be written according to Java rules. Hence, if $b is an object of type
Book, $b.authors depends on the (Java!) visibility of member authors. If it
isn't public, you must use the getter.
I always have the variables "protected" and use public getters. For
other variables, $b.xxx just works, as long as getXxx() exists. But
for $b.authors, even if I have getAuthors() there, it still doesn't
work. That's why I'm suspecting something wrong with the list - the
only difference is that authors is an EList object...
Still don't know why...
-Simon
-W
>
> Thanks.
> -Simon
> _______________________________________________
> rules-users mailing list
> rules-users(a)lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
_______________________________________________
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9:57 a.m.
On 02/06/2011 15:24, Simon Chen wrote:
2011/6/2 Wolfgang Laun<wolfgang.laun(a)gmail.com>:
> On 1 June 2011 21:43, Simon Chen<simonchennj(a)gmail.com> wrote:
>> Hi all,
>>
>> I am always confused about what we can do in the "then" part of the
rule.
>>
>> In particular, I have problem duplicate a list. For example:
>>
>> when:
>> $b: Book( "james" memberOf authors )
>> then:
>> Test fact = new Test();
>> fact.getList().addAll( $b.authors );
>> insert(fact);
>> end
>>
>> The error message reads like this:
>>
>> BuildError: Unable to build expression for 'consequence': [Error:
>> Failed to compile: 2 compilation error(s):
>> - (1,7) unqualified type in strict mode for: $b
>> - (1,12) unqualified type in strict mode for: authors]
>>
>> What is the right way to do this?
> Granted - the error message is a puzzle in itself, but basically, the RHS
> must be written according to Java rules. Hence, if $b is an object of type
> Book, $b.authors depends on the (Java!) visibility of member authors. If it
> isn't public, you must use the getter.
I always have the variables "protected" and use public getters. For
other variables, $b.xxx just works, as long as getXxx() exists. But
for $b.authors, even if I have getAuthors() there, it still doesn't
work. That's why I'm suspecting something wrong with the list - the
only difference is that authors is an EList object...
Have you tried this with 5.2 CR1, lots of MVEL fixes.
Mark
Still don't know why...
-Simon
> -W
>
>> Thanks.
>> -Simon
>> _______________________________________________
>> rules-users mailing list
>> rules-users(a)lists.jboss.org
>> https://lists.jboss.org/mailman/listinfo/rules-users
>
> _______________________________________________
> rules-users mailing list
> rules-users(a)lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
>
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
9:52 a.m.
On 02/06/2011 08:14, Wolfgang Laun wrote:
On 1 June 2011 21:43, Simon Chen <simonchennj(a)gmail.com
<mailto:simonchennj@gmail.com>> wrote:
Hi all,
I am always confused about what we can do in the "then" part of
the rule.
In particular, I have problem duplicate a list. For example:
when:
$b: Book( "james" memberOf authors )
then:
Test fact = new Test();
fact.getList().addAll( $b.authors );
insert(fact);
end
The error message reads like this:
BuildError: Unable to build expression for 'consequence': [Error:
Failed to compile: 2 compilation error(s):
- (1,7) unqualified type in strict mode for: $b
- (1,12) unqualified type in strict mode for: authors]
What is the right way to do this?
Granted - the error message is a puzzle in itself, but basically, the
RHS must be written according to Java rules. Hence, if $b is an object
of type Book, $b.authors depends on the (Java!) visibility of member
authors. If it isn't public, you must use the getter.
I believe he's using
"mvel" judging by the error.
mark
-W
Thanks.
-Simon
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org <mailto:rules-users@lists.jboss.org>
https://lists.jboss.org/mailman/listinfo/rules-users
_______________________________________________
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https://lists.jboss.org/mailman/listinfo/rules-users
9:59 a.m.
If you cast $b on the RHS it will probably work. We've had to do this in
the past for rules like this.
....
then:
Test fact = new Test();
Book rhsBook = (Book)$b;
fact.getList().addAll( rhsBook.authors );
insert(fact);
end
From: rules-users-bounces(a)lists.jboss.org
[mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Mark Proctor
Sent: Thursday, June 02, 2011 8:52 AM
To: rules-users(a)lists.jboss.org
Subject: Re: [rules-users] list operations in "then" part
On 02/06/2011 08:14, Wolfgang Laun wrote:
On 1 June 2011 21:43, Simon Chen <simonchennj(a)gmail.com> wrote:
Hi all,
I am always confused about what we can do in the "then" part of
the rule.
In particular, I have problem duplicate a list. For example:
when:
$b: Book( "james" memberOf authors )
then:
Test fact = new Test();
fact.getList().addAll( $b.authors );
insert(fact);
end
The error message reads like this:
BuildError: Unable to build expression for 'consequence':
[Error:
Failed to compile: 2 compilation error(s):
- (1,7) unqualified type in strict mode for: $b
- (1,12) unqualified type in strict mode for: authors]
What is the right way to do this?
Granted - the error message is a puzzle in itself, but basically, the
RHS must be written according to Java rules. Hence, if $b is an object
of type Book, $b.authors depends on the (Java!) visibility of member
authors. If it isn't public, you must use the getter.
I believe he's using "mvel" judging by the error.
mark
-W
Thanks.
-Simon
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
2:23 p.m.
No, this doesn't work...
Drools-5.2 doesn't help either :-(
2011/6/2 Joe White <Joe.White(a)recondotech.com>:
If you cast $b on the RHS it will probably work. We’ve had to do this
in the
past for rules like this.
….
then:
Test fact = new Test();
Book rhsBook = (Book)$b;
fact.getList().addAll( rhsBook.authors );
insert(fact);
end
From: rules-users-bounces(a)lists.jboss.org
[mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Mark Proctor
Sent: Thursday, June 02, 2011 8:52 AM
To: rules-users(a)lists.jboss.org
Subject: Re: [rules-users] list operations in "then" part
On 02/06/2011 08:14, Wolfgang Laun wrote:
On 1 June 2011 21:43, Simon Chen <simonchennj(a)gmail.com> wrote:
Hi all,
I am always confused about what we can do in the "then" part of the rule.
In particular, I have problem duplicate a list. For example:
when:
$b: Book( "james" memberOf authors )
then:
Test fact = new Test();
fact.getList().addAll( $b.authors );
insert(fact);
end
The error message reads like this:
BuildError: Unable to build expression for 'consequence': [Error:
Failed to compile: 2 compilation error(s):
- (1,7) unqualified type in strict mode for: $b
- (1,12) unqualified type in strict mode for: authors]
What is the right way to do this?
Granted - the error message is a puzzle in itself, but basically, the RHS
must be written according to Java rules. Hence, if $b is an object of type
Book, $b.authors depends on the (Java!) visibility of member authors. If it
isn't public, you must use the getter.
I believe he's using "mvel" judging by the error.
mark
-W
Thanks.
-Simon
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
3:47 p.m.
Can I maybe do a for loop in the "then" part? Is there a documentation
regarding what is possible/impossible in the "then" part?
Thanks.
-Simon
On Fri, Jun 3, 2011 at 3:23 PM, Simon Chen <simonchennj(a)gmail.com> wrote:
No, this doesn't work...
Drools-5.2 doesn't help either :-(
2011/6/2 Joe White <Joe.White(a)recondotech.com>:
> If you cast $b on the RHS it will probably work. We’ve had to do this in the
> past for rules like this.
>
>
>
> ….
>
> then:
> Test fact = new Test();
>
> Book rhsBook = (Book)$b;
> fact.getList().addAll( rhsBook.authors );
> insert(fact);
> end
>
>
>
>
>
> From: rules-users-bounces(a)lists.jboss.org
> [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Mark Proctor
> Sent: Thursday, June 02, 2011 8:52 AM
> To: rules-users(a)lists.jboss.org
> Subject: Re: [rules-users] list operations in "then" part
>
>
>
> On 02/06/2011 08:14, Wolfgang Laun wrote:
>
> On 1 June 2011 21:43, Simon Chen <simonchennj(a)gmail.com> wrote:
>
> Hi all,
>
> I am always confused about what we can do in the "then" part of the rule.
>
> In particular, I have problem duplicate a list. For example:
>
> when:
> $b: Book( "james" memberOf authors )
> then:
> Test fact = new Test();
> fact.getList().addAll( $b.authors );
> insert(fact);
> end
>
> The error message reads like this:
>
> BuildError: Unable to build expression for 'consequence': [Error:
> Failed to compile: 2 compilation error(s):
> - (1,7) unqualified type in strict mode for: $b
> - (1,12) unqualified type in strict mode for: authors]
>
> What is the right way to do this?
>
> Granted - the error message is a puzzle in itself, but basically, the RHS
> must be written according to Java rules. Hence, if $b is an object of type
> Book, $b.authors depends on the (Java!) visibility of member authors. If it
> isn't public, you must use the getter.
>
> I believe he's using "mvel" judging by the error.
>
> mark
>
>
> -W
>
>
> Thanks.
> -Simon
> _______________________________________________
> rules-users mailing list
> rules-users(a)lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
>
>
>
>
> _______________________________________________
>
> rules-users mailing list
>
> rules-users(a)lists.jboss.org
>
> https://lists.jboss.org/mailman/listinfo/rules-users
>
>
>
> _______________________________________________
> rules-users mailing list
> rules-users(a)lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
>
1:55 a.m.
I cannot reproduce this error.
Do NOT rely on the automatic substitution of getters for simple field
accesses on a rule's right hand side, at least not for 5.2.0 CR.
Moreover, I cannot compile the constraint
"jones" memberOf authors
This should be written as
authors contains "jones".
For further analysis full workable code reproducing the issue would be
required.
-W
On 3 June 2011 22:47, Simon Chen <simonchennj(a)gmail.com> wrote:
Can I maybe do a for loop in the "then" part? Is there a
documentation
regarding what is possible/impossible in the "then" part?
Thanks.
-Simon
On Fri, Jun 3, 2011 at 3:23 PM, Simon Chen <simonchennj(a)gmail.com> wrote:
> No, this doesn't work...
>
> Drools-5.2 doesn't help either :-(
>
> 2011/6/2 Joe White <Joe.White(a)recondotech.com>:
>> If you cast $b on the RHS it will probably work. We’ve had to do this in
the
>> past for rules like this.
>>
>>
>>
>> ….
>>
>> then:
>> Test fact = new Test();
>>
>> Book rhsBook = (Book)$b;
>> fact.getList().addAll( rhsBook.authors );
>> insert(fact);
>> end
>>
>>
>>
>>
>>
>> From: rules-users-bounces(a)lists.jboss.org
>> [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Mark Proctor
>> Sent: Thursday, June 02, 2011 8:52 AM
>> To: rules-users(a)lists.jboss.org
>> Subject: Re: [rules-users] list operations in "then" part
>>
>>
>>
>> On 02/06/2011 08:14, Wolfgang Laun wrote:
>>
>> On 1 June 2011 21:43, Simon Chen <simonchennj(a)gmail.com> wrote:
>>
>> Hi all,
>>
>> I am always confused about what we can do in the "then" part of the
rule.
>>
>> In particular, I have problem duplicate a list. For example:
>>
>> when:
>> $b: Book( "james" memberOf authors )
>> then:
>> Test fact = new Test();
>> fact.getList().addAll( $b.authors );
>> insert(fact);
>> end
>>
>> The error message reads like this:
>>
>> BuildError: Unable to build expression for 'consequence': [Error:
>> Failed to compile: 2 compilation error(s):
>> - (1,7) unqualified type in strict mode for: $b
>> - (1,12) unqualified type in strict mode for: authors]
>>
>> What is the right way to do this?
>>
>> Granted - the error message is a puzzle in itself, but basically, the
RHS
>> must be written according to Java rules. Hence, if $b is an object of
type
>> Book, $b.authors depends on the (Java!) visibility of member authors. If
it
>> isn't public, you must use the getter.
>>
>> I believe he's using "mvel" judging by the error.
>>
>> mark
>>
>>
>> -W
>>
>>
>> Thanks.
>> -Simon
>> _______________________________________________
>> rules-users mailing list
>> rules-users(a)lists.jboss.org
>> https://lists.jboss.org/mailman/listinfo/rules-users
>>
>>
>>
>>
>>
>> _______________________________________________
>>
>> rules-users mailing list
>>
>> rules-users(a)lists.jboss.org
>>
>> https://lists.jboss.org/mailman/listinfo/rules-users
>>
>>
>>
>> _______________________________________________
>> rules-users mailing list
>> rules-users(a)lists.jboss.org
>> https://lists.jboss.org/mailman/listinfo/rules-users
>>
>>
>
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
2:31 p.m.
"not memberOf" somehow worked for me...
My actual line of code was: router not memberOf $route.hops
I got around the addAll() issue by passing the list into the
constructor of fact1...
-Simon
2011/6/4 Wolfgang Laun <wolfgang.laun(a)gmail.com>:
I cannot reproduce this error.
Do NOT rely on the automatic substitution of getters for simple field
accesses on a rule's right hand side, at least not for 5.2.0 CR.
Moreover, I cannot compile the constraint
"jones" memberOf authors
This should be written as
authors contains "jones".
For further analysis full workable code reproducing the issue would be
required.
-W
On 3 June 2011 22:47, Simon Chen <simonchennj(a)gmail.com> wrote:
>
> Can I maybe do a for loop in the "then" part? Is there a documentation
> regarding what is possible/impossible in the "then" part?
>
> Thanks.
> -Simon
>
> On Fri, Jun 3, 2011 at 3:23 PM, Simon Chen <simonchennj(a)gmail.com> wrote:
> > No, this doesn't work...
> >
> > Drools-5.2 doesn't help either :-(
> >
> > 2011/6/2 Joe White <Joe.White(a)recondotech.com>:
> >> If you cast $b on the RHS it will probably work. We’ve had to do this
> >> in the
> >> past for rules like this.
> >>
> >>
> >>
> >> ….
> >>
> >> then:
> >> Test fact = new Test();
> >>
> >> Book rhsBook = (Book)$b;
> >> fact.getList().addAll( rhsBook.authors );
> >> insert(fact);
> >> end
> >>
> >>
> >>
> >>
> >>
> >> From: rules-users-bounces(a)lists.jboss.org
> >> [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Mark Proctor
> >> Sent: Thursday, June 02, 2011 8:52 AM
> >> To: rules-users(a)lists.jboss.org
> >> Subject: Re: [rules-users] list operations in "then" part
> >>
> >>
> >>
> >> On 02/06/2011 08:14, Wolfgang Laun wrote:
> >>
> >> On 1 June 2011 21:43, Simon Chen <simonchennj(a)gmail.com> wrote:
> >>
> >> Hi all,
> >>
> >> I am always confused about what we can do in the "then" part of
the
> >> rule.
> >>
> >> In particular, I have problem duplicate a list. For example:
> >>
> >> when:
> >> $b: Book( "james" memberOf authors )
> >> then:
> >> Test fact = new Test();
> >> fact.getList().addAll( $b.authors );
> >> insert(fact);
> >> end
> >>
> >> The error message reads like this:
> >>
> >> BuildError: Unable to build expression for 'consequence': [Error:
> >> Failed to compile: 2 compilation error(s):
> >> - (1,7) unqualified type in strict mode for: $b
> >> - (1,12) unqualified type in strict mode for: authors]
> >>
> >> What is the right way to do this?
> >>
> >> Granted - the error message is a puzzle in itself, but basically, the
> >> RHS
> >> must be written according to Java rules. Hence, if $b is an object of
> >> type
> >> Book, $b.authors depends on the (Java!) visibility of member authors.
> >> If it
> >> isn't public, you must use the getter.
> >>
> >> I believe he's using "mvel" judging by the error.
> >>
> >> mark
> >>
> >>
> >> -W
> >>
> >>
> >> Thanks.
> >> -Simon
> >> _______________________________________________
> >> rules-users mailing list
> >> rules-users(a)lists.jboss.org
> >> https://lists.jboss.org/mailman/listinfo/rules-users
> >>
> >>
> >>
> >>
> >>
> >> _______________________________________________
> >>
> >> rules-users mailing list
> >>
> >> rules-users(a)lists.jboss.org
> >>
> >> https://lists.jboss.org/mailman/listinfo/rules-users
> >>
> >>
> >>
> >> _______________________________________________
> >> rules-users mailing list
> >> rules-users(a)lists.jboss.org
> >> https://lists.jboss.org/mailman/listinfo/rules-users
> >>
> >>
> >
>
> _______________________________________________
> rules-users mailing list
> rules-users(a)lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
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9 comments
4 participants
participants (4)
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Joe White -
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Simon Chen -
Wolfgang Laun