[jboss-jira] [JBoss JIRA] (DROOLS-1741) Using a function in nested objects

[Mario Fusco (Jira)]

     [ https://issues.redhat.com/browse/DROOLS-1741?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mario Fusco resolved DROOLS-1741.
---------------------------------
    Resolution: Won't Fix


If Drools would allow a syntax like 

{code}
ObjectA( objectB. ( (someFunction(someVariable)) == 0 ) )
{code}

it would be not only highly confusing but even ambiguous. It is much simpler and clearer to use a more Java-like syntax here like in

{code}
ObjectA( someFunction(objectB.someVariable) == 0 ) )
{code}


> Using a function in nested objects
> ----------------------------------
>
>                 Key: DROOLS-1741
>                 URL: https://issues.redhat.com/browse/DROOLS-1741
>             Project: Drools
>          Issue Type: Bug
>          Components: core engine
>    Affects Versions: 6.5.0.Final
>         Environment: Drools 6.5.0.Final
> JDK 1.8
>            Reporter: R D
>            Assignee: Mario Fusco
>            Priority: Minor
>         Attachments: Compilation_error.PNG, Compilation_error.PNG
>
>
> I am working with a project with nested objects.
> I have a rule in which I need to make use of a function. If I use this function on a variable in a nested object it does not work (I get a compilation error):
> Using the nested object accessor approach (compilation error "Unable to Analyse Expression"):
>         ObjectA( objectB. ( (someFunction(someVariable)) == 0 ) )
> EDIT: The same compilation error occurs as well when just using a more complex operation on variables in nested objects as well (updated project on GitHub):
>         ObjectA( objectB. ( (someVariable == 0 || someVariable == 1 ) || (someVariable > -1 || someVariable < 2 )) )



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