[rules-users] Rule Templates - comma separated data

[Wolfgang Laun]

The operators "in" and "not in" operate on parenthesized lists of operands.
They can be used with a single template parameter expanding as a list.

   Person( likes in ( "apple", "banana", "chili" ) )

is the same as

  Person( likes == "apple" || == "banana" || == "chili" )

-W



On 21 June 2011 18:34, Witham, Darren <darren.witham at citi.com> wrote:

> I have successfully generated a .drl file from a decision table. The column
> headers in this table made use of the forall(||) construct which happily
> parsed the corresponding comma separated data in the relevant spreadsheet
> cell to nice || separated conditions.
>
> We have since decided to use the template approach so we can store rule
> data in a db. We ideally want to store this data as key/value pairs in a db
> table where the values may contain comma separated data. The intention being
> these values would be processed as per the decision table.
>
> How is this achieved using a template ? I note that a column can be denoted
> as an array column by adding [] i.e.
>
> template header
> column[]
>
>
> However, although this appears create an ArrayColumn parser, and splits the
> comma separated data when running through a debugger, any attempt to access
> it in the template falls over in mvel code trying to call HashMap.column
>
>
> Any examples on how to set this up ?
>
> Thx
>
>
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