[jboss-jira] [JBoss JIRA] (DROOLS-315) Support overloading of accumulate functions: Add int (or long) based sum's, int based avarage's, etc

[Geoffrey De Smet (JIRA)]

     [ https://issues.jboss.org/browse/DROOLS-315?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Geoffrey De Smet updated DROOLS-315:
------------------------------------
    Priority: Critical  (was: Minor)


> Support overloading of accumulate functions: Add int (or long) based sum's, int based avarage's, etc 
> -----------------------------------------------------------------------------------------------------
>
>                 Key: DROOLS-315
>                 URL: https://issues.jboss.org/browse/DROOLS-315
>             Project: Drools
>          Issue Type: Feature Request
>            Reporter: Geoffrey De Smet
>            Assignee: Edson Tirelli
>            Priority: Critical
>         Attachments: JBRULES-1075.patch
>
>
> TTP nl10 solver has about a 3% performance increase when switching from sumDouble to sumLong (and possibly a bit more when switching to sumInteger)
> There are 2 ways I see to implement this:
> 1) Force the user to explicitly declare he wants to use an integer based sum and add a sumInteger.
> This is not so user-friendly. This is what I 've done in the patch.
> 2) Support overloading of accumulate functions based on the function arguments.
> AFAIK drl is strongly typed (at least with the java dialect), so it should be theoretically possible for the drl parser to see
>  sum($myInteger)
> and bind it to SumIntegerAccumulateFunction,
> while binding
>  sum($myInteger.doubleValue())
> to SumDoubleAccumulateFunction.
> And added advantage is that the drl compiler will also mark some bugs as compiler errors. For example
>   sum($myString)



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