1:26 p.m.
I’m new to Drools and having trouble accessing my Domain object which is basically a
container around a map.
class Person {
Map props;
public Map getProps();
…. Extra stuff
}
I want to create a rule that will match when Age is greater than 20 and name is one of
“Fred”, “Barney”, or “Wilma”. These entries are stored in the Map props, so that to get
age, you would call person.getProps().get(“AGE”)
rule "My Rule"
dialect "mvel"
when
$person : Person(
props[“AGE”] > 20,
props[“NAME”] memberOf [“Fred”, “Wilma”, “Barney”]
)
then
System.out.println("found match”+$person);
End
But I am running into a parsing error:
no viable alternative at input ')' in rule "My Rule" in pattern Person.
The second condition seems to be the problem. Can I check for membership inside a List I
create inline in mvel?
1:38 p.m.
New subject: Using memberOf on inline mvel list was Re: Welcome to the "rules-users" mailing list
Apologies for the initial subject. Changing to a more appropriate one.
On Feb 21, 2010, at 2:26 PM, Adam Krieg wrote:
I’m new to Drools and having trouble accessing my Domain object which
is basically a container around a map.
class Person {
Map props;
public Map getProps();
…. Extra stuff
}
I want to create a rule that will match when Age is greater than 20 and name is one of
“Fred”, “Barney”, or “Wilma”. These entries are stored in the Map props, so that to get
age, you would call person.getProps().get(“AGE”)
rule "My Rule"
dialect "mvel"
when
$person : Person(
props[“AGE”] > 20,
props[“NAME”] memberOf [“Fred”, “Wilma”, “Barney”]
)
then
System.out.println("found match”+$person);
End
But I am running into a parsing error:
no viable alternative at input ')' in rule "My Rule" in pattern
Person.
The second condition seems to be the problem. Can I check for membership inside a List I
create inline in mvel?
6:49 p.m.
New subject: Using memberOf on inline mvel list was Re: Welcome to the "rules-users" mailing list
Did you tried:
props[“NAME”] in (“Fred”, “Wilma”, “Barney”)
Or, if you are using the mvel dialect:
props[“NAME”] memberOf ( [“Fred”, “Wilma”, “Barney”] )
Note the () around the mvel inline list, and don't forget to set the
mvel dialect for the rule in the second case.
Edson
2010/2/21 <spamcontrol(a)mac.com>
Apologies for the initial subject. Changing to a more appropriate
one.
On Feb 21, 2010, at 2:26 PM, Adam Krieg wrote:
> I’m new to Drools and having trouble accessing my Domain object which is
basically a container around a map.
>
> class Person {
> Map props;
> public Map getProps();
> …. Extra stuff
> }
>
>
> I want to create a rule that will match when Age is greater than 20 and
name is one of “Fred”, “Barney”, or “Wilma”. These entries are stored in
the Map props, so that to get age, you would call
person.getProps().get(“AGE”)
>
>
>
> rule "My Rule"
> dialect "mvel"
> when
> $person : Person(
> props[“AGE”] > 20,
> props[“NAME”] memberOf [“Fred”,
“Wilma”, “Barney”]
> )
> then
> System.out.println("found match”+$person);
>
> End
>
> But I am running into a parsing error:
> no viable alternative at input ')' in rule "My Rule" in pattern
Person.
>
> The second condition seems to be the problem. Can I check for membership
inside a List I create inline in mvel?
>
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
--
Edson Tirelli
JBoss Drools Core Development
JBoss by Red Hat @ www.jboss.com
3:07 p.m.
You are expecting map values to be elevated somehow from Object to Integer
and String.
By using typed attributes in the Person class you can overcome your problem.
Sent from my HTC (Android)
On Feb 21, 2010 9:28 PM, "Adam Krieg" <spamcontrol(a)mac.com> wrote:
I’m new to Drools and having trouble accessing my Domain object which is
basically a container around a map.
class Person {
Map props;
public Map getProps();
…. Extra stuff
}
I want to create a rule that will match when Age is greater than 20 and name
is one of “Fred”, “Barney”, or “Wilma”. These entries are stored in the
Map props, so that to get age, you would call person.getProps().get(“AGE”)
rule "My Rule"
dialect "mvel"
when
$person : Person(
props[“AGE”] > 20,
props[“NAME”] memberOf [“Fred”, “Wilma”,
“Barney”]
)
then
System.out.println("found match”+$person);
End
But I am running into a parsing error:
no viable alternative at input ')' in rule "My Rule" in pattern Person.
The second condition seems to be the problem. Can I check for membership
inside a List I create inline in mvel?
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
4:14 p.m.
New subject: memberOf mvel list
I'm using a map because this is a legacy class that is quite dynamic and can
contain arbitrary tag/values. Ideally, if I knew all the attributes I would
declare them as fields, but I'm stuck with this map at the moment.
Regardless, using your explanation, why does
when
$person : Person(
props[“AGE”] > 20,
(props[“NAME”] =="Fred" ||
props["NAME"]
== "Barney || props["NAME"] == "Wilma"])
)
work?
Corneil du Plessis-2 wrote:
You are expecting map values to be elevated somehow from Object to Integer
and String.
By using typed attributes in the Person class you can overcome your
problem.
Sent from my HTC (Android)
On Feb 21, 2010 9:28 PM, "Adam Krieg" <spamcontrol(a)mac.com> wrote:
I’m new to Drools and having trouble accessing my Domain object which is
basically a container around a map.
class Person {
Map props;
public Map getProps();
…. Extra stuff
}
I want to create a rule that will match when Age is greater than 20 and
name
is one of “Fred”, “Barney”, or “Wilma”. These entries are stored in the
Map props, so that to get age, you would call person.getProps().get(“AGE”)
rule "My Rule"
dialect "mvel"
when
$person : Person(
props[“AGE”] > 20,
props[“NAME”] memberOf [“Fred”,
“Wilma”,
“Barney”]
)
then
System.out.println("found match”+$person);
End
But I am running into a parsing error:
no viable alternative at input ')' in rule "My Rule" in pattern
Person.
The second condition seems to be the problem. Can I check for membership
inside a List I create inline in mvel?
_______________________________________________
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
--
View this message in context:
http://n3.nabble.com/Welcome-to-the-rules-users-mailing-list-tp325731p325...
Sent from the Drools - User mailing list archive at Nabble.com.
4:36 p.m.
New subject: memberOf mvel list
Hi Adam,
try operator "in" instead of "memberOf". AFAIK, "in" deals
with list
literals (which is what you want) whereas "memberof" can be used to
check whether some value is part of a collection given as variable
reference.
Kind regards
Ansgar
Am 21.02.2010 23:14, schrieb deaddowney:
I'm using a map because this is a legacy class that is quite
dynamic and can
contain arbitrary tag/values. Ideally, if I knew all the attributes I would
declare them as fields, but I'm stuck with this map at the moment.
Regardless, using your explanation, why does
when
$person : Person(
props[“AGE”]> 20,
(props[“NAME”] =="Fred" ||
props["NAME"]
== "Barney || props["NAME"] == "Wilma"])
)
work?
Corneil du Plessis-2 wrote:
> You are expecting map values to be elevated somehow from Object to Integer
> and String.
> By using typed attributes in the Person class you can overcome your
> problem.
>
> Sent from my HTC (Android)
>
> On Feb 21, 2010 9:28 PM, "Adam Krieg"<spamcontrol(a)mac.com> wrote:
>
> I’m new to Drools and having trouble accessing my Domain object which is
> basically a container around a map.
>
> class Person {
> Map props;
> public Map getProps();
> …. Extra stuff
> }
>
>
> I want to create a rule that will match when Age is greater than 20 and
> name
> is one of “Fred”, “Barney”, or “Wilma”. These entries are stored in the
> Map props, so that to get age, you would call person.getProps().get(“AGE”)
>
>
>
> rule "My Rule"
> dialect "mvel"
> when
> $person : Person(
> props[“AGE”]> 20,
> props[“NAME”] memberOf [“Fred”,
> “Wilma”,
> “Barney”]
> )
> then
> System.out.println("found match”+$person);
>
> End
>
> But I am running into a parsing error:
> no viable alternative at input ')' in rule "My Rule" in pattern
Person.
>
> The second condition seems to be the problem. Can I check for membership
> inside a List I create inline in mvel?
>
>
> _______________________________________________
> 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
>
>
>
11:32 a.m.
New subject: memberOf mvel list
Am I being blind or are "in" and "not in" not actually documented in
the drools expert user guide? In particular the fact that the syntax for the list is to
put it in round brackets (1,2,3) and not the square brackets [1,2,3] which you would
expect from the mvel documentation.
Also why can't memberOf work off an inline mvel list anyway?
Thomas
-----Original Message-----
From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-
bounces(a)lists.jboss.org] On Behalf Of Ansgar Konermann
Sent: 21 February 2010 22:37
To: Rules Users List
Subject: Re: [rules-users] memberOf mvel list
Hi Adam,
try operator "in" instead of "memberOf". AFAIK, "in" deals
with list
literals (which is what you want) whereas "memberof" can be used to
check whether some value is part of a collection given as variable
reference.
Kind regards
Ansgar
Am 21.02.2010 23:14, schrieb deaddowney:
> I'm using a map because this is a legacy class that is quite dynamic and can
> contain arbitrary tag/values. Ideally, if I knew all the attributes I would
> declare them as fields, but I'm stuck with this map at the moment.
> Regardless, using your explanation, why does
>
> when
> $person : Person(
> props[“AGE”]> 20,
> (props[“NAME”] =="Fred" ||
props["NAME"]
> == "Barney || props["NAME"] == "Wilma"])
> )
>
> work?
>
>
> Corneil du Plessis-2 wrote:
>
>> You are expecting map values to be elevated somehow from Object to Integer
>> and String.
>> By using typed attributes in the Person class you can overcome your
>> problem.
>>
>> Sent from my HTC (Android)
>>
>> On Feb 21, 2010 9:28 PM, "Adam Krieg"<spamcontrol(a)mac.com>
wrote:
>>
>> I’m new to Drools and having trouble accessing my Domain object which is
>> basically a container around a map.
>>
>> class Person {
>> Map props;
>> public Map getProps();
>> …. Extra stuff
>> }
>>
>>
>> I want to create a rule that will match when Age is greater than 20 and
>> name
>> is one of “Fred”, “Barney”, or “Wilma”. These entries are stored in the
>> Map props, so that to get age, you would call person.getProps().get(“AGE”)
>>
>>
>>
>> rule "My Rule"
>> dialect "mvel"
>> when
>> $person : Person(
>> props[“AGE”]> 20,
>> props[“NAME”] memberOf [“Fred”,
>> “Wilma”,
>> “Barney”]
>> )
>> then
>> System.out.println("found match”+$person);
>>
>> End
>>
>> But I am running into a parsing error:
>> no viable alternative at input ')' in rule "My Rule" in
pattern Person.
>>
>> The second condition seems to be the problem. Can I check for membership
>> inside a List I create inline in mvel?
>>
>>
>> _______________________________________________
>> 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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1:33 a.m.
New subject: memberOf mvel list
The original problem seems to be due to not using a *variable* on the
right hand side
of "memberOf", as defined in Drools Expert, subsection 4.8.2.1.1.3.1.,
Operators.
-W
On Sun, Feb 21, 2010 at 11:14 PM, deaddowney <spamcontrol(a)mac.com> wrote:
I'm using a map because this is a legacy class that is quite dynamic and can
contain arbitrary tag/values. Ideally, if I knew all the attributes I would
declare them as fields, but I'm stuck with this map at the moment.
Regardless, using your explanation, why does
when
$person : Person(
props[“AGE”] > 20,
(props[“NAME”] =="Fred" ||
props["NAME"]
== "Barney || props["NAME"] == "Wilma"])
)
work?
Corneil du Plessis-2 wrote:
>
> You are expecting map values to be elevated somehow from Object to Integer
> and String.
> By using typed attributes in the Person class you can overcome your
> problem.
>
> Sent from my HTC (Android)
>
> On Feb 21, 2010 9:28 PM, "Adam Krieg" <spamcontrol(a)mac.com> wrote:
>
> I’m new to Drools and having trouble accessing my Domain object which is
> basically a container around a map.
>
> class Person {
> Map props;
> public Map getProps();
> …. Extra stuff
> }
>
>
> I want to create a rule that will match when Age is greater than 20 and
> name
> is one of “Fred”, “Barney”, or “Wilma”. These entries are stored in the
> Map props, so that to get age, you would call person.getProps().get(“AGE”)
>
>
>
> rule "My Rule"
> dialect "mvel"
> when
> $person : Person(
> props[“AGE”] > 20,
> props[“NAME”] memberOf [“Fred”,
> “Wilma”,
> “Barney”]
> )
> then
> System.out.println("found match”+$person);
>
> End
>
> But I am running into a parsing error:
> no viable alternative at input ')' in rule "My Rule" in pattern
Person.
>
> The second condition seems to be the problem. Can I check for membership
> inside a List I create inline in mvel?
>
>
> _______________________________________________
> 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
>
>
--
View this message in context:
http://n3.nabble.com/Welcome-to-the-rules-users-mailing-list-tp325731p325...
Sent from the Drools - User mailing list archive at Nabble.com.
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5387
days inactive
5392
days old
7 comments
8 participants
participants (8)
-
Adam Krieg -
Ansgar Konermann -
Corneil du Plessis -
deaddowney
-
Edson Tirelli -
spamcontrol＠mac.com
-
Swindells, Thomas -
Wolfgang Laun