Thanks for your answer Thomas. It showed that this construct works fine
either way with 5.3.0.CR1, but it's other rule that causes the error:
rule "restriction number paramId: 1, id: 0"
when
$param : EmParamValue(id == 1, enabled == true)
$def : EmParamDefinition(this == $param.paramDefinitionId)
$cust : EmCustomParamDefinition(this == $param.customParamDef)
$constr: EmNumberConstraint(this == $cust.constraints)
$restr: EmNumberRestriction(this == $constr.restrictions[0], min <=
$param.requiredValue, max >= $param.requiredValue)
then
EmRulesUtils.logRuleExecution(kcontext);
result.addValidParam($param);
end
and 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']
It compiles successfully when I remove
this == $constr.restrictions[0]
part from last line of LHS.Again, it worked well in 5.1.1.
On 10/05/2011 12:14 PM, Swindells, Thomas wrote:
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-boun...@lists.jboss.org [mailto:rules-users-
boun...@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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