Why do you need the and in the rule?
Have you tried

rule "enabled paramId: 1, id: 0"
salience 50
when

      def0: EmParamDefinition(paramName == "p2", listIndex == -1)
      EmParamValue(paramDefinitionId == def0, requiredValue == 1)
      $param : EmParamValue(id == 1, enabled == false)
      not ParentDisabled(id == 1)
 then
      $param.setEnabled(true);
      update($param);
 end

Thomas

-----Original Message-----
From: rules-users-bounces@lists.jboss.org [mailto:rules-users-
bounces@lists.jboss.org] On Behalf Of Waclaw Borowiec
Sent: 05 October 2011 10:55
To: rules-users@lists.jboss.org
Subject: [rules-users] Compilation errors with 5.3.0.CR1

Hello

I'm sending the message once again due to problems with code samples
visibility in the previous one.

I've got following rule:

rule "enabled paramId: 1, id: 0"
salience 50
when
     (def0: EmParamDefinition(paramName == "p2", listIndex == -1) and
EmParamValue(paramDefinitionId == def0, requiredValue == 1))
     $param : EmParamValue(id == 1, enabled == false)
     not ParentDisabled(id == 1)
then
     $param.setEnabled(true);
     update($param);
end>

It compiles fine under Drools 5.1.1, but after switching to 5.3.0.CR1 I get
following exception:

[Error: unexpected end of statement]
[Near : {... def ....}]
                 ^
[Line: 1, Column: 4]
     at
org.mvel2.compiler.AbstractParser._captureBlock(AbstractParser.java:1470)
     at
org.mvel2.compiler.AbstractParser.captureCodeBlock(AbstractParser.java:14
46)
     at org.mvel2.compiler.AbstractParser.nextToken(AbstractParser.java:421)
     at
org.mvel2.compiler.ExpressionCompiler._compile(ExpressionCompiler.java:1
28)
     at
org.mvel2.compiler.ExpressionCompiler.compile(ExpressionCompiler.java:62
)
     at org.mvel2.MVEL.analysisCompile(MVEL.java:668)
     at org.mvel2.MVEL.analysisCompile(MVEL.java:672)
     at
org.drools.rule.builder.PatternBuilder.setInputs(PatternBuilder.java:854)
     at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:595)
     at
org.drools.rule.builder.PatternBuilder.processConstraintsAndBinds(PatternB
uilder.java:397)
     at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:309)
     at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:132)
     at
org.drools.rule.builder.GroupElementBuilder.build(GroupElementBuilder.jav
a:65)
     at org.drools.rule.builder.RuleBuilder.build(RuleBuilder.java:80)
     at org.drools.compiler.PackageBuilder.addRule(PackageBuilder.java:2241)
     at
org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:802)
     at
org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java
:388)
     at
org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder
.java:566)
     at
org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.ja
va:35)
     at
com.proximetry.elmgr.services.DependenciesBean$Expander.addDrl(Depen
denciesBean.java:110)


It is

(def0: EmParamDefinition(paramName == "p2", listIndex == -1) and
EmParamValue(paramDefinitionId == def0, requiredValue == 1))


line that causes the problem - the exeption disappears after removing it.
What's interesting, when I add '$' sign to binding variable name, and the line
looks like:

($def0: EmParamDefinition(paramName == "p2", listIndex == -1) and
EmParamValue(paramDefinitionId == $def0, requiredValue == 1))


instead of the exception I get DRL error:

[DialectError message='Unable to wire compiled classes, probably related to
compilation failures:sun.reflect.generics.reflectiveObjects.WildcardTypeImpl
cannot be cast to java.lang.Class']


For completness, this is how I add DRL resources:

public void addDrl(Reader rdr) {
              KnowledgeBuilder kBuilder =
KnowledgeBuilderFactory.newKnowledgeBuilder();

              kBuilder.add( ResourceFactory.newReaderResource(rdr),
ResourceType.DRL);
              if( kBuilder.hasErrors() ){
                  for( KnowledgeBuilderError err: kBuilder.getErrors() ){
                      StackTrace.error(this, err);
                  }
                  throw new IllegalStateException( "DRL errors" );
              }
              knowledgeBase.addKnowledgePackages(
kBuilder.getKnowledgePackages() );
              }


I would be grateful if someone has an idea, why after switching Drools
version such problem exists.
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