<div dir="ltr">My last comparison there may be problematic as well...too focused on the accumulate to see the obvious. I think that approach might still require an eval to check the size constraint on the list and we don't really want that. <div>
<br></div><div>What you could do instead, however, is insert the hashset into the working memory in that rule's consequence and have a 2nd rule that's just HashSet ( size > 1 ) and its consequence does your actions and retracts the hashset back out of memory.</div>
<div><br></div><div>- J</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Tue, Jul 22, 2014 at 9:39 AM, Jeremy Ary <span dir="ltr"><<a href="mailto:jeremy.ary@gmail.com" target="_blank">jeremy.ary@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">err, typo there, add() and remove() should be using $myId instead of $id</div><div class="HOEnZb"><div class="h5">
<div class="gmail_extra"><br><br><div class="gmail_quote">On Tue, Jul 22, 2014 at 9:38 AM, Jeremy Ary <span dir="ltr"><<a href="mailto:jeremy.ary@gmail.com" target="_blank">jeremy.ary@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><pre style="color:rgb(51,51,51);font-size:15px;line-height:20.790000915527344px">I wonder if something like this might do it?</pre>
<pre><font color="#333333"><span style="font-size:15px;line-height:20.790000915527344px">when
$set : HashSet ( ) from accumulate ( ObjectA ( $myId : objectC.myId ),
init ( HashSet uniqueIds = new HashSet<String>(); ),
action ( uniqueIds.add($id); ),
reverse ( uniqueIds.remove($id); ),
result ( uniqueIds ) )
HashSet ( this == $set, size > 1 )
then
// consequence
end<span><font color="#888888"><br></font></span></span></font></pre><span><font color="#888888"><pre><font color="#333333"><span style="font-size:15px;line-height:20.790000915527344px"><br>
</span></font></pre><pre><font color="#333333"><span style="font-size:15px;line-height:20.790000915527344px">- Jeremy</span></font></pre>
</font></span></div><div><div><div class="gmail_extra"><br><br><div class="gmail_quote">On Tue, Jul 22, 2014 at 8:42 AM, richardhands <span dir="ltr"><<a href="mailto:richard.hands@uk.sopragroup.com" target="_blank">richard.hands@uk.sopragroup.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi,<br>
<br>
I’m trying to wrap my head around how to use a combination of accumulate<br>
from and collect from to get a count of how many unique items there are of a<br>
nested child property and run the RHS of a rule if it’s > 1<br>
<br>
So I have<br>
<br>
Many of Object A<br>
<br>
Each one contains<br>
An object B<br>
An object C<br>
<br>
Object C contains a nested child property<br>
<br>
So<br>
<br>
A<br>
+-+-B<br>
|<br>
+-C – property myId<br>
<br>
(many of these in the working memory)<br>
<br>
The rule I’m working with right now is<br>
<br>
rule "B must only be at 1 myId per day"<br>
when<br>
$b : B()<br>
$c : C()<br>
$aList : ArrayList (size > 1)<br>
from collect(<br>
A(b == $b, c.getDate() == $c.getDate()) )<br>
eval ( RulesUtils.countIdsForC ($aList) > 1 )<br>
then<br>
//fire some rules here<br>
end<br>
<br>
and the RulesUtils method is<br>
<br>
public static int countIdsForC (List aList)<br>
{<br>
Set<Integer> myIds = new HashSet<Integer>();<br>
for (A a : aList)<br>
{<br>
myIds.add(a.getC().getMyId());<br>
}<br>
return myIds.size();<br>
}<br>
<br>
<br>
Now I’m well aware that this is sub-optimal, and indeed is firing lots of<br>
extra times and is really (Really) slow. I can vizualise that this should<br>
easily be possible with some combination of compound accumulate and collect<br>
statements, but for the life of me I can’t work out the correct arrangement<br>
(This is actually for use in an optaplanner ruleset so it will potentially<br>
be working on lots of data, over many iterations).<br>
<br>
Any suggestions on how to do this the way I know it needs to be, greatfully<br>
appreciated <br>
<br>
<br>
<br>
<br>
--<br>
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