Chris,
Thanks for reporting this.
I fixed a bug in 4.0.0 (released in 4.0.1) that causes you to see the correct value for "TestEval1" in 4.0.1 and later versions. Although, at that time I missed the memberOf scenario. I know why it happens (shadow fact related), but now I need to figure out a way to fix it.
May I ask you to open a ticket for that?
Thanks,
Edson
2007/9/18, Chris West <crayzfishr@gmail.com>:
All,
I'm having a problem using memberOf combined with a collect statement. My test includes 3 rules each written to output the same results (I think), but I get different results (depending on which version of Drools I use).
The rules are:
rule "TestMemberOf"
salience 10
when
$messages: ArrayList() from collect (Message(status == 100))
$wrappers: ArrayList() from collect (Wrapper(message memberOf $messages))
then
System.out.println("TestMemberOf: " + $wrappers.size());
end
rule "TestEval1"
salience 9
when
$messages: ArrayList() from collect (Message(status == 100))
$wrappers: ArrayList() from collect (Wrapper($message: message, eval($messages.contains($message))))
then
System.out.println("TestEval1: " + $wrappers.size());
end
rule "TestEval2"
salience 8
when
$wrappers: ArrayList() from collect (Wrapper($message: message, eval($message.getStatus() == 100)))
then
System.out.println("TestEval2: " + $wrappers.size());
end
The output is (by version):
4.0.0
TestMemberOf: 0
TestEval1: 0
TestEval2: 2
4.0.1
TestMemberOf: 0
TestEval1: 2
TestEval2: 2
4.0.2.SNAPSHOT (taken 9/18/07)
TestMemberOf: 0
TestEval1: 2
TestEval2: 2
The correct output should be:
TestMemberOf: 2
TestEval1: 2
TestEval2: 2
Am I using memberOf correctly? Is there some issue using an eval to test conditions on a list created by a collect?
Any help would be appreciated.
Attached is the full example.
Thanks,
-Chris West
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Edson Tirelli
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