[rules-users] rules-users Digest, Vol 40, Issue 41
Nilima R
nilima.r at tcs.com
Thu Mar 11 01:19:15 EST 2010
The documentation available for Guvnor does not contain any examples .Is
there any other documentation available so that we can understand how to
create functions,dsl and other features available in Guvnor.
Nilima
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Date:
03/11/2010 01:19 AM
Subject:
rules-users Digest, Vol 40, Issue 41
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Today's Topics:
1. A general question about this mailing list (Nathan Bell)
2. Re: A general question about this mailing list (Geoffrey De Smet)
3. Re: Problems count and sumarizing data in facts (Yamil Bracho)
----------------------------------------------------------------------
Message: 1
Date: Wed, 10 Mar 2010 11:31:00 -0600
From: "Nathan Bell" <Nathan.Bell at pharmacyonesource.com>
Subject: [rules-users] A general question about this mailing list
To: <rules-users at lists.jboss.org>
Message-ID: <608FA11CE83EC54C98A8E4715C0EED571966DF at rphpost.rph.int>
Content-Type: text/plain; charset="us-ascii"
I'm fairly new to this list, but I have already seen a great deal of
helpful information being shared. The problem is that a collection of
emails makes a poor knowledge base. Has there ever been an attempt to
set up a forum/wiki/knowledgebase for the Drools community? I would be
willing to help with setting that up if it is something the community
wants. I'm guessing that this has been talked about before, so I want to
check-in with the community and ask why it does not exist already. Is
there some barrier that I am not aware of that would make a different
format undesirable?
Thank You,
Nathan Bell
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Message: 2
Date: Wed, 10 Mar 2010 19:25:39 +0100
From: Geoffrey De Smet <ge0ffrey.spam at gmail.com>
Subject: Re: [rules-users] A general question about this mailing list
To: rules-users at lists.jboss.org
Message-ID: <hn8o73$b59$1 at dough.gmane.org>
Content-Type: text/plain; charset=windows-1252; format=flowed
I personally don't believe much in a wiki (there is a drools wiki btw),
because it gets stale fast.
I believe much more in the reference manual, which is checked in in
Subversion.
In the Drools Planner manual I 've already added "meta" information,
such as where jira is and how to build from source etc etc.
https://hudson.jboss.org/hudson/job/drools/lastSuccessfulBuild/artifact/trunk/target/docs/drools-planner/html_single/index.html
With kind regards,
Geoffrey De Smet
Nathan Bell schreef:
> I?m fairly new to this list, but I have already seen a great deal of
> helpful information being shared. The problem is that a collection of
> emails makes a poor knowledge base. Has there ever been an attempt to
> set up a forum/wiki/knowledgebase for the Drools community? I would be
> willing to help with setting that up if it is something the community
> wants. I?m guessing that this has been talked about before, so I want to
> check-in with the community and ask why it does not exist already. Is
> there some barrier that I am not aware of that would make a different
> format undesirable?
>
>
>
> Thank You,
>
>
>
> Nathan Bell
>
>
>
>
> ------------------------------------------------------------------------
>
> _______________________________________________
> rules-users mailing list
> rules-users at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
------------------------------
Message: 3
Date: Wed, 10 Mar 2010 19:38:09 +0000
From: Yamil Bracho <yamilbracho at hotmail.com>
Subject: Re: [rules-users] Problems count and sumarizing data in facts
To: Drools UserList <rules-users at lists.jboss.org>
Message-ID: <SNT130-w419F987761CE0A1C882981AA330 at phx.gbl>
Content-Type: text/plain; charset="windows-1252"
Thanks Thomas.
I rewrote the rule as:
rule "Sumatoria de lineas detalle vs Header" salience 10 when Number(
$total : doubleValue) from accumulate( Map(this["_TYPE_"] ==
"D", $monto : eval(Double.parseDouble(this.get("MONTO")))),
sum($monto)) $map : Map(this["_TYPE_"] == "H",
this["MT_TOTAL"] != $total) then System.out.println("TOTAL=" +
$total); listBitacora.add(new BitacoraDTO($map.get("_NUMLINE_"),
"Error en el Detalle: El n?mero del lineas de detalle (" + $total +
") no empareja con lo del
encabezado (" + $map.get("NU_REGISTROS") + ")")); end
but I am getting errors in the parseDouble:
[828,29]: [ERR 101] Line 828:29 no viable alternative at input 'Double' in
rule "Sumatoria de lineas detalle vs Header" in pattern Map[828,67]: [ERR
102] Line 828:67 mismatched input ')' expecting 'then' in rule "Sumatoria
de lineas detalle vs Header"
Any hint...
From: TSwindells at nds.com
To: rules-users at lists.jboss.org
Date: Wed, 10 Mar 2010 15:13:49 +0000
Subject: Re: [rules-users] Problems count and sumarizing data in facts
To convert from string to double you have to full back to java:
Something along the lines of
$monto : eval(Double.parseDouble(this.get(?MONTO?)))
However even with doing this your rules are unlikely to work consistently
as you expect. Using equality tests on doubles is fundamentally unsafe as
doubles
aren?t represented exactly and may not exactly match the value you think
you have. Force instance 0.1+0.1+0.1+0.1+0.1+0.1+0.1+0.1+0.1+0.1 != 1.0
(dependent on floating point chipset etc). If you are dealing with
currency then it is far simpler and safer
to just operate with integers and divide by 100 when you want to display
the value. The other alternative is to use BigDecimal which will store an
exact representation but will probably require more work with getting your
accumulate function correct. Your
last option is to use Math.abs(left-right) < 0.1 to see if they are
approximately equal. More details can be found here
http://firstclassthoughts.co.uk/java/traps/java_double_traps.html
Thomas
From: rules-users-bounces at lists.jboss.org [
mailto:rules-users-bounces at lists.jboss.org]
On Behalf Of Yamil Bracho
Sent: 10 March 2010 14:27
To: Drools UserList
Subject: Re: [rules-users] Problems count and sumarizing data in facts
I solved the counting of detail lines this way:
rule "Contador de lineas detalle vs Header"
salience 10
when
Number($count : intValue) from accumulate(
$mp : Map(this["_TYPE_"] == "D"), count($mp))
$map : Map(this["_TYPE_"] == "H",
this["NU_REGISTROS"] != $count)
then
System.out.println("NumRecs=" + $count);
listBitacora.add(new BitacoraDTO($map.get("_NUMLINE_"),
"El n?mero del lineas de detalle
(" + $count +
") no empareja con lo del
encabezado (" + $map.get("NU_REGISTROS") + ")"));
end
However, I still got problem with summarize the amounts. I wrote
rule "Sumatoria de lineas detalle vs Header"
salience 10
when
Number( $total : doubleValue) from accumulate(
Map(this["_TYPE_"] == "D",
$monto : ((Number) this["MONTO"]),
sum($monto)))
$map : Map(this["_TYPE_"] == "H",
this["MT_TOTAL"] != $total)
then
System.out.println("TOTAL=" + $total);
listBitacora.add(new BitacoraDTO($map.get("_NUMLINE_"),
"Error en el Detalle: El n?mero
del lineas de detalle (" + $total +
") no empareja con lo del
encabezado (" + $map.get("NU_REGISTROS") + ")"));
end
And i am getting mismatched input" so my question is how to convert a
string to double in this line "$monto : ((Number) this["MONTO"])," ?
TIA
Yamil
From: yamilbracho at hotmail.com
To: rules-users at lists.jboss.org
Date: Tue, 9 Mar 2010 17:41:43 +0000
Subject: [rules-users] Problems count and sumarizing data in facts
Hi, I have two kind of facts in a map.
There is a field called _TYPE_ (H)eader, D)etail)
In the Header line I have two String fields, one for the number of details
lines ("NU_REGISTROS") and another for the sum of the detail line
("MT_TOTAL")
In the detail lines I only have a String field called "MONTO"
I would like to build two rules. One to check the count of detail lines
versus the field in the header line so I wrote :
rule "Contador de lineas detalle vs Header"
salience 10
when
$numRecs : Number()
from accumulate(Map(this["_TYPE_"] == "D", $d :
this["_NUMLINE_"]), count($d))
$map : Map(this["_TYPE_"] == "H",
this["NU_REGISTROS"] != $numRecs)
then
System.out.println("NumRecs=" + $numRecs);
listBitacora.add(new BitacoraDTO($map.get("_NUMLINE_"),
"Error en el Detalle: El n?mero
del lineas de detalle (" + $total +
") no empareja con lo del
encabezado (" + $map.get("NU_REGISTROS") + ")"));
end
However I always got "NumRecs=1" when i print out the value of $numRecs
but I am absolute sure there is two details lines...
Second when i try to sumarize the total field in the details line i got
(MONTO in the detail line is a string):
rule "Sumatoria de lineas detalle vs Header"
salience 10
when
$total : Number()
from accumulate(Map(this["_TYPE_"] == "D",
$monto : this["MONTO"]),
sum(eval(Double.valueOf((String) $monto
))))
$map : Map(this["_TYPE_"] == "H",
this["MT_TOTAL"] != $total)
then
System.out.println("TOTAL=" + $total);
listBitacora.add(new BitacoraDTO($map.get("_NUMLINE_"),
"Error en el Detalle: El n?mero
del lineas de detalle (" + $total +
") no empareja con lo del
encabezado (" + $map.get("NU_REGISTROS") + ")"));
end
but I got
Rule Compilation error : [Rule name='Sumatoria de lineas detalle vs
Header']
rule/Rule_Sumatoria_de_lineas_detalle_vs_Header_0.java (9:1313) :
The method eval(Double) is undefined for the type
Rule_Sumatoria_de_lineas_detalle_vs_Header_0
Any help in those tow problems
TIA
Yamil
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