Something like this?<br><br><span style="font-family: courier new,monospace;">when</span><br style="font-family: courier new,monospace;"><span style="font-family: courier new,monospace;"> $t : Town( )</span><br style="font-family: courier new,monospace;">
<span style="font-family: courier new,monospace;"> $s : SuperMarket( town == $t, $lid : locationId )</span><br style="font-family: courier new,monospace;"><span style="font-family: courier new,monospace;"> $ls : HashSet( size == 3) from ( Location( locationId = $lid ) )</span><br style="font-family: courier new,monospace;">
<br>I suspect Location would have to override equals and hashCode correctly.<br><br>Once you have some DRL that works I'd suggest moving to Guvnor.<br><br><div class="gmail_quote">On 12 November 2011 23:15, LCode <span dir="ltr"><<a href="mailto:j_whittlesea@hotmail.com">j_whittlesea@hotmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">I am trying to write a rule via the guided rule editor and I am really<br>
struggling.<br>
<br>
The following is a simplified explanation of my scenario:<br>
<br>
I have a model where there are lots of 'Town' objects, each town has any<br>
number of 'Supermarket' objects and each supermarket has a list of integers<br>
'locationID'.<br>
<br>
Something like this....<br>
<br>
<Town><br>
<Supermarket name = 'asda'><br>
<LocationID>15</LocationID><br>
<LocationID>18</LocationID><br>
</Supermarket><br>
<Supermarket name = 'tesco'><br>
<LocationID>13</LocationID><br>
</Supermarket><br>
<Supermarket name = 'lidl'><br>
<LocationID>13</LocationID><br>
<LocationID>15</LocationID><br>
<LocationID>18</LocationID><br>
</Supermarket><br>
</Town><br>
<br>
(apologies to the Sainsburys shoppers!!)<br>
<br>
I need to write a rule that fires when there are precisely 3 unique location<br>
ID's in the whole town.<br>
<br>
So in the example above the complete list of locationIDs would be 13, 13,<br>
15, 15, 18, 18<br>
With the following unique numbers 13, 15, 18<br>
therefore the rule would fire as there are 3 unique numbers.<br>
<br>
I hope that makes some sense.<br>
<br>
I understand that I should collect the locationIDs into a java.util.Set in<br>
order to count unique entries and I can collect together all supermarkets<br>
into an arraylist. However I cannot for the life of me seem to collect<br>
LocationID across all supermarkets.<br>
<br>
Thank you so much in anticipation, I realise this was rather long-winded!<br>
<span class="HOEnZb"><font color="#888888"><br>
--<br>
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