[jboss-jira] [JBoss JIRA] (JBRULES-3392) strict mode evaluation taking interface instead of class

[Joerg Woehrle (JIRA)]

     [ https://issues.jboss.org/browse/JBRULES-3392?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Joerg Woehrle updated JBRULES-3392:
-----------------------------------

    Attachment: DroolsTest.zip


Mario, I think I also stumbled upon this. Attached a test case where you can see that mvel somehow does not respect the covariant return type. Even though DoubleHolder.getValue is returning Double it complains about the BaseClass' CommonBase.getValue() returning an Object. The test might not be the most sophisticated one but it shows how this problem came up in our environment...
                
> strict mode evaluation taking interface instead of class
> --------------------------------------------------------
>
>                 Key: JBRULES-3392
>                 URL: https://issues.jboss.org/browse/JBRULES-3392
>             Project: Drools
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>          Components: drools-compiler (expert)
>    Affects Versions: 5.3.1.Final
>         Environment: java 1.6.0_29 on windows 7
>            Reporter: Lubos Pechac
>            Assignee: Mario Fusco
>             Fix For: 5.3.2.Final, 5.4.0.CR1
>
>         Attachments: DroolsTest.zip
>
>
> I am getting a compilation error with my drl, that worked in 5.0.1:
> Unable to Analyse Expression las.id == $las.id:
> [Error: unable to resolve method using strict-mode: piag.entityinterface.ILink.id()]
> [Near : {... las.id == $las.id ....}]
>                  ^
> [Line: 42, Column: 30] : [Rule name='rule1']
> here's the rule:
> rule "rule1"
> when
>   $las : Link(name == "GA1")
>   $pi : PayItem(las.id == $las.id, amount > 0, comparisonType == "ECHT")
> then ...
> interface ILink is empty:
> public interface ILink { }
> class Link extends ILink adds a few attributes including id, name, amount, comparisonType...
> interface IPayItem has this getter:
> public ILink getLas();
> class PayItem overrides this getter:
> @Override
> public Link getLas() {
>   return this.las;
> }
> It seems like drools is incorrectly treating $pi as IPayItem. IPayItem.getLas() returns ILink which does not have method id(), as the message says. But PayItem.getLas() returns Link which does have attribute id.
> I didn't specify anywhere that $pi is IPayItem so why does it do this?

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