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@lists.jboss.org [mailto:rules-users-bounces@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