Thank you very much Steve its working fine.

I need one clarification in drl file. Here I am checking the two values, the first value is from Numbers calss “one” and another is 2 which is constant

Is there any constraint the right side condition will take only constant value like numeric or final filed in the class etc.

rule "check less"

no-loop true

when

n : Numbers( one < 2)

then

System.out.println( "One Less then Two" );

n.setResult(n.getOne()+n.getTwo());

System.out.println(n.getResult());

end

The situation like as follows I need to check two fields in the class. Sample rule is given below

rule "check less"

no-loop true

when

n : Numbers( one < two)

then

System.out.println( "One Less then Two" );

n.setResult(n.getOne()+n.getTwo());

System.out.println(n.getResult());

end

Here one and two are the two fields in the class Numbers so here I am comparing two fields so I got like this error

org.drools.rule.InvalidRulePackage: Unable to return Declaration for identifier 'two'

at org.drools.rule.Package.checkValidity(Unknown Source)

at org.drools.common.AbstractRuleBase.addPackage(Unknown Source)

at com.sample.AddDroolsTest.readRule(AddDroolsTest.java:66)

at com.sample.AddDroolsTest.main(AddDroolsTest.java:22)

How to resolve it?

Thanks & Regards

Shilpa

-----Original Message-----
From: rules-users-bounces@lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Steven Williams
Sent: Monday, January 29, 2007 10:20 AM
To: Rules Users List
Subject: Re: [rules-users] java.lang.NoSuchMethodError

Sorry Shilpa - I was looking at 3.0.5. What I said still holds true though - make sure the v642 jar is at the top of your runtime classpath.

On 1/29/07, shilpa.raghavendra@wipro.com <shilpa.raghavendra@wipro.com> wrote:

I am using org.drools.ide_3.0.4 as eclipse plug-in it's having org.eclipse.jdt.core_3.2.0.v_642.jar

Still I have to use higher version

Regards

Shilpa

-----Original Message-----
From: rules-users-bounces@lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Steven Williams
Sent: Monday, January 29, 2007 9:15 AM
To: Rules Users List
Subject: Re: [rules-users] java.lang.NoSuchMethodError

Hi Shilpa,

It looks like you do not have org.eclipse.jdt.core_3.2.0.v_671.jar in your classpath. You should find it in the eclipse/plugins directory - just add it to your application's classpath.

cheers
Steve

On 1/29/07, shilpa.raghavendra@wipro.com <shilpa.raghavendra@wipro.com > wrote:

I am new to Drools. I wanted to put the rules in the project so I am learning this.

So I have taken code sample from Maven Repository bur I am getting following error.

To run the Example I Have used eclipse as IDE and the drl file in XML format.

java.lang.NoSuchMethodError: org.eclipse.jdt.internal.compiler.CompilationResult.getProblems()[Lorg/eclipse/jdt/core/compiler/CategorizedProblem;

at org.apache.commons.jci.compilers.EclipseJavaCompiler$2.acceptResult(EclipseJavaCompiler.java:237 )

at org.eclipse.jdt.internal.compiler.Compiler.compile( Compiler.java:454 )

at org.apache.commons.jci.compilers.EclipseJavaCompiler.compile( EclipseJavaCompiler.java:268 )

at org.drools.compiler.PackageBuilder.compileAll(Unknown Source)

at org.drools.compiler.PackageBuilder.addPackage(Unknown Source)

at org.drools.compiler.PackageBuilder.addPackageFromDrl(Unknown Source)

at org.drools.examples.HonestPoliticianExample.main( HonestPoliticianExample.java:20 )