Thanks Enda.Yes, I read carefully the docs and understand that eval expected a
boolena expression.I succesfully change the rule to :
rule "Sumatoria de lineas detalle vs Header" salience 10 when Number(
$total : doubleValue) from accumulate( Map(this["_TYPE_"] == "D",
$monto : this["MONTO"]), sum(toDouble($monto)))
$map : Map(this["_TYPE_"] == "H", $totEnc :
this["MT_TOTAL"]) && eval(toDouble($totEnc) != $total)
then System.out.println("Encabezado:" + toDouble($totEnc) + ", Detalle=" +
$total); listBitacora.add(new BitacoraDTO($map.get("_NUMLINE_"),
"Error en el Detalle: El número del lineas de
detalle (" + $total + ") no empareja
con lo del encabezado (" + $map.get("NU_REGISTROS") + ")")); end
Where "toDouble" is a function :
function double toDouble(Object oMonto) { String strMonto =
oMonto.toString(); int len = strMonto.length(); int pos = len - 2;
strMonto = StringUtils.left(strMonto, pos) + "." +
StringUtils.right(strMonto,2);
//return Double.valueOf(strMonto) ; double d =
Double.parseDouble(strMonto);
return d;}
Thanks to Enda and Thomas for help me to solve this...
Date: Thu, 11 Mar 2010 15:02:33 +0000
From: ejdigg...@gmail.com
To: rules-users@lists.jboss.org
Subject: Re: [rules-users] Problems count and sumarizing data in facts
Hi Yamil,
'eval()' expects a primitive boolean value as a result of the expression. You
may need to look into creating a custom accumulate function that can accept a
string and do the conversion in java. Have a look at section 6.5.2.10.1
Accumulate Function in the Drools documentation:
http://downloads.jboss.com/drools/docs/4.0.7.19894.GA/html_single/index.html
Alternatively, you could change the type of your map to something like
Map<String, Double>
Hope it helps,
Enda
2010/3/11 Yamil Bracho <yamilbra...@hotmail.com>
I rewrote as :
rule "Sumatoria de lineas detalle vs Header" salience 10 when Number(
$total : doubleValue) from accumulate(
Map(this["_TYPE_"] == "D", $monto :
this["MONTO"]), sum(eval(toDouble($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 número del
lineas de detalle (" + $total + ") no
empareja con lo del encabezado (" + $map.get("NU_REGISTROS") + ")"));
end Where "toDouble" is :
function Double toDouble(Object oMonto) { String strMonto =
oMonto.toString(); int len = strMonto.length();
int pos = len - 3;
strMonto = StringUtils.left(strMonto, pos) + "." +
StringUtils.right(strMonto,2);
return Double.valueOf(strMonto) ;
}
And I got
Rule Compilation error : [Rule name='Sumatoria de lineas detalle vs Header']
rule/Rule_Sumatoria_de_lineas_detalle_vs_Header_0.java (9:1350) : The
method eval(Double) is undefined for the type
Rule_Sumatoria_de_lineas_detalle_vs_Header_0
Thanks again, Thomas..!
From: tswinde...@nds.com
To: rules-users@lists.jboss.org
Date: Thu, 11 Mar 2010 09:25:31 +0000
Subject: Re: [rules-users] Problems count and sumarizing data in facts
Have you tried assigning the string to $monto and then performing the evel
within the sum?
From: rules-users-boun...@lists.jboss.org
[mailto:rules-users-boun...@lists.jboss.org]
On Behalf Of Yamil Bracho
Sent: 10 March 2010 19:38
To: Drools UserList
Subject: Re: [rules-users] Problems count and sumarizing data in facts
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 número 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: tswinde...@nds.com
To: rules-users@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
$monto : eval(Double.parseDouble(this.get(“MONTO”)))
However even with doing this your rules are unlikely to work consistently as
you expect. Using equality tests on doubles is fundamentally unsafe as doubles
aren’t represented exactly and may not exactly match the value you think you
have. Force instance 0.1+0.1+0.1+0.1+0.1+0.1+0.1+0.1+0.1+0.1 != 1.0 (dependent
on floating point chipset etc). If you are dealing with currency then it is
far simpler and safer
to just operate with integers and divide by 100 when you want to display the
value. The other alternative is to use BigDecimal which will store an exact
representation but will probably require more work with getting your accumulate
function correct. Your
last option is to use Math.abs(left-right) < 0.1 to see if they are
approximately equal. More details can be found here
http://firstclassthoughts.co.uk/java/traps/java_double_traps.html
Thomas
From: rules-users-boun...@lists.jboss.org
[mailto:rules-users-boun...@lists.jboss.org]
On Behalf Of Yamil Bracho
Sent: 10 March 2010 14:27
To: Drools UserList
Subject: Re: [rules-users] Problems count and sumarizing data in facts
I solved the counting of detail lines this way:
rule "Contador de lineas detalle vs Header"
salience 10
when
Number($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 número 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 número 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: yamilbra...@hotmail.com
To: rules-users@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 número 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 número 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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