[jboss-user] [Beginners Corner] - Drools DSL nested expressions

Flavius do-not-reply at jboss.com
Tue Dec 16 06:01:19 EST 2008


I am beginning with Drools, especially with DSL and I'd like to use some expanders like this:

add {area} to "{setOfAreas}"
  | "{street1}" street from crossing with "{street2}" street to "{square}" square
and enable the user write in consequences

add "Michigan" street from crossing with "Golden" street to "London" square to "allowedAreas"

Is that possible? I know this would shift DSL to non-regular languages, probably causing some shift/reduce and reduce/reduce conflicts, but the designer of DSL should be programmer, who is aware of that.

Thank you

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