[rules-users] Retrieve values from a Map

[Manav]

Thanks a lot Edson . The below approach worked like a charrm :).  I went with 
the second approach 


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

Regards,
Akash 

 

________________________________
From: Edson Tirelli <tirelli at post.com>
To: Manav <manav7574 at yahoo.com>; Rules Users List <rules-users at lists.jboss.org>
Sent: Wed, August 11, 2010 7:46:40 PM
Subject: Re: [rules-users] Retrieve values from a Map


    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
>
>
>
>
>
>_______________________________________________
>rules-users mailing list
>rules-users at lists.jboss.org
>https://lists.jboss.org/mailman/listinfo/rules-users
>


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



      
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