[rules-users] Querying for a particular object from working memory

[Anstis, Michael (M.)]

Hi,
 
Yep, this can be done with the following:-
 
rule "largest X"
    when
        X ( $v : value )
        not X (value > $v)
    then
        // $v is the maximum
end
 
rule "lowest X"
    when
        X ( $v : value )
        not X (value < $v)
    then
        // $v is the minimum
 
There are more examples on the wiki.
 
Cheers,
 
Mike


  _____  

From: rules-users-bounces at lists.jboss.org
[mailto:rules-users-bounces at lists.jboss.org] On Behalf Of Jai Vasanth
Sent: 01 February 2008 15:14
To: Rules Users List
Subject: [rules-users] Querying for a particular object from working memory


Hi,

  Is there a way to query for an object of type X among a pool of objects of
type X in working memory that have the maximum/minimum value  of a
particular attribute  a1 ?

For example

if I have a class C

Class C {

int a1;
int a2;

}

As part of my rules evaluataion I have N instances of C inserted into
working memory  c1,c2.....cn.  Now I would like to query for the object that
the max value of attribute a1

Is this possible?

Thanks
Jai 


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