My problem is that I am running it using Guvnor and in Guvnor it is not able to
recognize the class when I write the import statement.
I tried creating drl using File-> New-> drl
I also tried to import the rt jar file(through "new file" option in drools 5.1
) but the package does not get built and gives import error. It seems it is not
able to recognize the jar.
Is there any way by which I can use the java api or start importing the api
jars into package(I don't want to use it as fact. Hence I am not using "upload
pojo model jar" option).
Best Regards,
Kripa
From: rules-users-boun...@lists.jboss.org
[mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Wolfgang Laun
Sent: Monday, October 04, 2010 11:45 AM
To: Rules Users List
Subject: Re: [rules-users] performing math function in drools
// appl.transport.Transport.java:
public class Transport {
public static double tax( double a, int n ){
return Math.pow( a, (double)n );
}
}
// transport.drl --------------------------------------------------
import function appl.transport.Transport.tax;
import function java.lang.Math.pow;
dialect "java"
function double sqr( double a ){
return Math.pow( a, 2.0 );
}
rule "demo"
when
Cargo( name == "Crate", , limit < ( tax( 20.0, 2 ) ) )
then
System.out.println( "tax=" + tax( 20.0, 2 ) );
System.out.println( "pow=" + pow( 20.0, 2.0 ) );
System.out.println( "sqr=" + sqr( 20.0 ) );
end
-W
2010/10/4 Kripa Nathwani
<kripa.nathw...@lntinfotech.com<mailto:kripa.nathw...@lntinfotech.com>>
But for using Math.pow() I have to import java.lang in that function.
Even after importing java.lang, it is not recognizing the function add giving
me error as :
Prohibited package name:java.class
If you can just forward me the link for that document you mentioned below, I
can get some useful insight into it.
Best Regards,
Kripa
From:
rules-users-boun...@lists.jboss.org<mailto:rules-users-boun...@lists.jboss.org>
[mailto:rules-users-boun...@lists.jboss.org<mailto:rules-users-boun...@lists.jboss.org>]
On Behalf Of Leandro Romero
Sent: Monday, October 04, 2010 10:22 AM
To: Rules Users List
Subject: Re: [rules-users] performing math function in drools
If you want to make a function call in LHS you have to use Eval, it allows you
to execute any Java code. In this especific case, you can call Math.pow()
inside of it.
Before using it, I strongly recommend you to read the documentation about it.
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