[rules-users] Please help - losing hair

[Richard Hoberman]

I'm using Drools 4 (M2), which is supposed to support nested accessors*

This works: when Claim( submissionInfo == null), but not this: when
Claim( submissionInfo.date == null)

Rule file, SubmissionInfo.java and exception are below.

What am I missing?

Richard




* See
http://article.gmane.org/gmane.comp.java.drools.user/8079/match=nested+properties,
which states "Support to nested accessors, property navigation and
simplified collection, arrays and maps syntax"

Rule File

---------------------------------------------------------------------------------------
package mvanamibia.claim;

import java.lang.Object;
import java.lang.String;
import java.lang.Double;
import java.util.Date;
import java.util.List;
import java.util.ArrayList;
import com.sadalbari.mvanamibia.beans.Claim;
import com.sadalbari.mvanamibia.beans.Mandate;
import com.sadalbari.mvanamibia.beans.SubmissionInfo;
import com.sadalbari.mvanamibia.inspector.ClaimEvaluation;

global ClaimEvaluation evaluation;

rule "hasDateReceived"

    when
        Claim( submissionInfo.date == null )
    then
        evaluation.getFailures().add("missing: date received");
end

-----------------------------------------------------------------------------------

Exception
-----------------------------------------------------------------------------------
org.drools.rule.InvalidRulePackage: [19,23]: unknown:19:23 mismatched
token: [@137,471:471='.',<69>,19:23]; expecting type RIGHT_PAREN
    at org.drools.rule.Package.checkValidity(Package.java:368)
    at
org.drools.common.AbstractRuleBase.addPackage(AbstractRuleBase.java:250)
    at
com.sadalbari.mvanamibia.model.UnregisteredClaimValidationTest.setupWorkingMemory(UnregisteredClaimValidationTest.java:33)
    at
com.sadalbari.mvanamibia.model.UnregisteredClaimValidationTest.testMandateClaim(UnregisteredClaimValidationTest.java:56)
... Removed 22 stack frames
FAILED: testEmptyClaim
org.drools.rule.InvalidRulePackage: [19,23]: unknown:19:23 mismatched
token: [@137,471:471='.',<69>,19:23]; expecting type RIGHT_PAREN
    at org.drools.rule.Package.checkValidity(Package.java:368)
    at
org.drools.common.AbstractRuleBase.addPackage(AbstractRuleBase.java:250)
    at
com.sadalbari.mvanamibia.model.UnregisteredClaimValidationTest.setupWorkingMemory(UnregisteredClaimValidationTest.java:33)
    at
com.sadalbari.mvanamibia.model.UnregisteredClaimValidationTest.testEmptyClaim(UnregisteredClaimValidationTest.java:42)
... Removed 22 stack frames


------------------------------------------------------
SubmissionInfo (relevant bits)

public class SubmissionInfo implements Serializable {

    private Date date;

    public Date getDate() {
        return date;
    }

    public void setDate(Date date) {
        this.date = date;
    }