[jboss-jira] [JBoss JIRA] (DROOLS-1397) Drools condition cannot retrieve object from Map with Enum key

[Patrick Mingard (JIRA)]

     [ https://issues.jboss.org/browse/DROOLS-1397?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Patrick Mingard updated DROOLS-1397:
------------------------------------
    Steps to Reproduce: 
A fact :

{code:java}
    public class Convention {
      private Map<ECommissionType, List<Commission>> commissions = new HashMap<>();
    }
{code}

An enumeration :

{code:java}
    public enum ECommissionType {
      ACQ,RIS,POF,[...]
    }
{code}

And a rule condition assuming $convention is properly initialized in a former condition and is an instance of the Convention class shown) :

{code:java}
     $comm : Commission() from $convention.getCommissions().get(ECommissionType.$1)
{code}

Compilation using kie-maven-plugin is raising an error : 

{code:java}
Unable to Analyse Expression $convention.getCommissions().get(ECommissionType.RIS)):
sun.reflect.generics.reflectiveObjects.ParameterizedTypeImpl cannot be cast to java.lang.Class : [Rule name='B_CommissionLigne_98']
{code}

  was:
A fact :

{code:java}
    public class Convention {
      private Map<ECommissionType, List<Commission>> commissions = new HashMap<>();
    }
{code}

An enumeration :

{code:java}
    public enum ECommissionType {
      ACQ,RIS,POF,[...]
    }
{code}

And a rule condition assuming $convention is properly initialized in a former condition and is an instance of the Convention class shown) :

{code:java}
     $comm : Commission() from $convention.getCommissions().get(ECommissionType.$1)
{code}

Compilation using kie-maven-plugin is raising an error : 

{code:java}
Unable to Analyse Expression $convention.getCommissions().get(ECommissionType.RIS)):
sun.reflect.generics.reflectiveObjects.ParameterizedTypeImpl cannot be cast to java.lang.Class : [Rule name='B_CommissionLigne_98']
{code}

(I'm sorry I'm completely unable to format correctly the code extracts on this site... more readable on stackoverflow)



> Drools condition cannot retrieve object from Map with Enum key
> --------------------------------------------------------------
>
>                 Key: DROOLS-1397
>                 URL: https://issues.jboss.org/browse/DROOLS-1397
>             Project: Drools
>          Issue Type: Bug
>          Components: core engine, decision tables
>    Affects Versions: 6.5.0.Final
>         Environment: JDK 1.7, JUnit test, exact drools version is 6.5.0.Final-redhat-2
>            Reporter: Patrick Mingard
>            Assignee: Mario Fusco
>            Priority: Minor
>             Fix For: 7.0.0.CR1
>
>
> I'm migrating an application that used drools 5.3 on the newer drools 6.5 version. 
> I'm using a decision table, And one of my condition is accessing a Map which has an enum class as a key. It is not compiling unless I do a strange ArrayList cast.
> Please refer to [this stackoverflow topic|http://stackoverflow.com/questions/41461468/drools-condition-cannot-retrieve-object-from-map-with-enum-key] for details.



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