[rules-users] Importing multiple functions from helper in MVEL dialect

[Travis_Smith at bnz.co.nz]

Hi folks,

>From the "Should I be loading a JIRA or have I just mucked up?" files:

The following import line makes all of the functions in that class 
available from ctrl-space for rules marked with both Mvel and Java (and 
not specified) dialects

import function bnz.btt.mylend.common.model.utils.DecisionHelper.*;

It compiles fine, and runs fine from any class _not_ marked as dialect 
"mvel"

However when I actually execute any of those functions from a rule marked 
with dialect "mvel" the following occurs:

(In this example I'm calling from the DecisionHelper the static method 
createSystemCreditDecisionReason)
___________________________________

org.drools.runtime.rule.ConsequenceException: rule: CAP 06 Rule

        at 
org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(
DefaultConsequenceExceptionHandler.java:23)
        at org.drools.common.DefaultAgenda.fireActivation(
DefaultAgenda.java:981)
        at org.drools.common.DefaultAgenda.fireNextItem(
DefaultAgenda.java:918)
        at org.drools.common.DefaultAgenda.fireAllRules(
DefaultAgenda.java:1130)
        at org.drools.common.AbstractWorkingMemory.fireAllRules(
AbstractWorkingMemory.java:740)
        at org.drools.common.AbstractWorkingMemory.fireAllRules(
AbstractWorkingMemory.java:706)
        at org.drools.impl.StatefulKnowledgeSessionImpl.fireAllRules(
StatefulKnowledgeSessionImpl.java:200)
        at bnz.btt.mylend.rules.test.MyLendingRulesTest.main(
MyLendingRulesTest.java:83)
Caused by: [Error: unable to access property (null parent): 
createSystemCreditDecisionReason]
[Near : {... Unknown ....}]
             ^
[Line: 1, Column: 0]
        at 
org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.getMethod(
ReflectiveAccessorOptimizer.java:886)
        at 
org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChain(
ReflectiveAccessorOptimizer.java:314)
        at 
org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.optimizeAccessor(
ReflectiveAccessorOptimizer.java:137)
        at org.mvel2.ast.ASTNode.getReducedValueAccelerated(
ASTNode.java:137)
        at org.mvel2.MVELRuntime.execute(MVELRuntime.java:85)
        at org.mvel2.compiler.CompiledExpression.getValue(
CompiledExpression.java:104)
        at org.mvel2.MVEL.executeExpression(MVEL.java:1001)
        at org.drools.base.mvel.MVELConsequence.evaluate(
MVELConsequence.java:87)
        at org.drools.common.DefaultAgenda.fireActivation(
DefaultAgenda.java:972)
        ... 6 more
___________________________________


There is a work-around: If I import each function separately it works just 
fine, eg:
___________________________________

import function 
bnz.btt.mylend.common.model.utils.DecisionHelper.createSystemCreditDecisionReason;
___________________________________

But as far as I can tell the ".*" notation to import all functions from a 
class SHOULD work.


So: Should I JIRA this, or have I just done something wrong?

Thanks!

Travis Smith
Analyst Programmer
Development Centre
BNZ

DDI: +644 4746356 (Or Ext 76356)

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