Re: [rules-users] Comparing names
Assuming that your facts are structured as the indentation suggests, I would
solve this using a technique you could call "virtual field". So, if a fact
object has fields
String title
List<PropGroup> pgList
and a PropGroup has fields
String name
List<String> pList
I would not try to get at the embedded data from the objects contained
within List<PropGroup>. Rather, I'd add a couple of getters to your Fact
class, each of which would return a Set<String> computed from the contained
List<PropGroup>. Then the rule simply becomes
rule "check-same"
when
$p1 : Fact( $t1 : title, $g1 : groupNames, $p1 : propNames )
$p2 : Fact( this != $p1, $t2 : title, ( groupNames != $g1 ||
propNames != $p1 ) )
then
System.out.println( "mismatch " + $t1 + " and " + $t2 );
end
Notice that this won't find the odd-man-out; it will fire twice for each
unequal pair.
-W
2009/5/14 Ian Spence <ianspence(a)gmail.com>
Hello all,
I am new to Drools…
I have a scenario
Each fact object will have the structure:
Title
Proprietor Group
Proprietor Name
E.g.
2100-100
J2 ½ share
SMITH, JOHN
JONES, FRED
T ½ share
BROWN, CHARLIE
2100-101
J2 ½ share
BROWN, CHARLIE
JONES, FRED
T ½ share
SMITH, JOHN
2100-102
T ½ share
BROWN, CHARLIE
J2 ½ share
JONES, FRED
SMITH, JOHN
The group names and the proprietor names must be the same across each
Title. The scenario above is a valid case. A failed case would result for
Title 2100-100 if we add an extra Proprietor name e.g. WHITE, MARY.
I anticipate having one rule to cater for this. I am hedging towards the
‘collect’ operator but cannot get a clear picture on how to implement it.
--
Regards,
Ian Spence
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