<br> Yap, that or, in case you want to do it automatically for ALL your rules, you could use:<br><br>KnowledgeBaseConfiguration conf = ...<br>conf.setOption( RemoveIdentitiesOption.YES );<br><br> Javadocs:<br><br><a href="http://downloads.jboss.com/drools/docs/5.0.1.26597.FINAL/apidocs/org/drools/KnowledgeBaseConfiguration.html">http://downloads.jboss.com/drools/docs/5.0.1.26597.FINAL/apidocs/org/drools/KnowledgeBaseConfiguration.html</a><br>
<a href="http://downloads.jboss.com/drools/docs/5.0.1.26597.FINAL/apidocs/org/drools/conf/RemoveIdentitiesOption.html">http://downloads.jboss.com/drools/docs/5.0.1.26597.FINAL/apidocs/org/drools/conf/RemoveIdentitiesOption.html</a><br>
<br> Edson<br><br><div class="gmail_quote">2009/11/6 Mark Proctor <span dir="ltr"><<a href="mailto:mproctor@codehaus.org">mproctor@codehaus.org</a>></span><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div class="im">D Brock wrote:<br>
> I have defined the following rule to detect when duplicate objects (in this<br>
> example, Widgets) exist. This always produces two matches, and therefore<br>
> two messages. I understand why this occurs, but I would like for only one<br>
> message to be reported. I cannot retract one of the widgets after a match<br>
> b/c all are needed for additional rules matching. Is the a conventional way<br>
> for accomplishing the elimination of the reciprocal match?<br>
><br>
> rule "Do not allow duplicate widgets"<br>
> when<br>
> $w : Widget( $name : name )<br>
> Widget( this != $w, name == $name )<br>
> then<br>
> System.out.println( "Duplicate widgets found with name = " + $name );<br>
> end<br>
><br>
</div>We are looking into a new conditional element that can achieve this. The<br>
idea is when you use this CE, it ensures only a single permutation will<br>
be propagated. In the meantime you can probably try something like:<br>
<br>
$w : Widget( $name : name )<br>
Widget( this != $w, hashCode < $w.hashCode, name == $name )<br>
<div><div></div><div class="h5"><br>
<br>
<br>
<br>
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</div></div></blockquote></div><br><br clear="all"><br>-- <br> Edson Tirelli<br> JBoss Drools Core Development<br> JBoss by Red Hat @ <a href="http://www.jboss.com">www.jboss.com</a><br>