[rules-users] Retrieve values from a Map

[Edson Tirelli]

    Did you tried this?

    Client(  $lang : language["Japanese"] != null )

    This will bind $lang to the value associated with the key "Japanese" on
the "languages" map and at the same time check that the value is not null.
If you want to explicit test if there is a key "Japanese" in the map, then
you can do:

    Client( languages.keySet contains "Japanese",  $lang :
language["Japanese"] )

    Edson

2010/8/11 Manav <manav7574 at yahoo.com>

> I am new to drools and currently using version 5.1 for my testing.
>
> I am facing an issue with retrieving a value from Map if a key is present
>
> In my drl if i do this
>
> $c : Client (language contains "Japanese" , lang : language ->
> (language.get("Japanese").equals("Expert")))
>
> it works ...but if i want to retrieve the value of the key i am not sure
> how to
> go about it . I tried various approaches but none of them worked
>
>
> i would like to do something like
>
> $c : Client (language contains "Japanese", $langValue :
> language.get("Japanese"))
>
>
> Can some one please guide me how to go about it .
>
> Regards,
> Manav
>
>
>
>
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>



-- 
  Edson Tirelli
  JBoss Drools Core Development
  JBoss by Red Hat @ www.jboss.com
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