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<div class="Section1">
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D">Generally the advice when using drools is that if you are wanting to use an array (or other type of collection) then you should probably be normalising your
data and putting the values of the collection into the working memory as their own object (pretend that drools is a relational database and follow the same rules as you would defining database tables and rows). Sometimes you can’t do this because of constraints
on the environment you are work within but in your case you I think you have two options:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D">Each room conceptually has its own sprinkler therefore each Sprinkler object contains a single room field.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D">If a Sprinkler has the concept of operating over multiple rooms then have a Sprinkler object containing its ID and status, then have multiple SprinklerHeadLocation
objects containing a reference to the Sprinkler and a single room each.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormalCxSpMiddle" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto">
<span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New"">Rule “ if fire in room start sprinkler if room has sprinkler”</span><span lang="EN-US" style="font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormalCxSpMiddle" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto">
<span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New"">No-loop true</span><span lang="EN-US" style="font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormalCxSpMiddle" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;text-autospace:none">
<b><span lang="EN-US" style="font-size:10.0pt;
font-family:"Courier New";color:#960000">when</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black">
</span><span lang="EN-US" style="font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormalCxSpMiddle" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;text-autospace:none">
<span lang="EN-US" style="font-size:10.0pt;font-family:
"Courier New""> </span><span lang="EN-US" style="font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormalCxSpMiddle" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;text-autospace:none">
<span lang="EN-US" style="font-size:10.0pt;font-family:
"Courier New";color:black"> Fire($room : room)<o:p></o:p></span></p>
<p class="MsoNormalCxSpMiddle" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;text-autospace:none">
<span lang="EN-US" style="font-size:10.0pt;font-family:
"Courier New";color:black"> SprinklerHeadLocation(room == $room, $sprinklerId : sprinklerId)</span><span lang="EN-US" style="font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormalCxSpMiddle" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;text-autospace:none">
<span lang="EN-US" style="font-size:10.0pt;font-family:
"Courier New";color:black"> $sprinkler : Sprinkler(sprinklerId == $sprinklerId, status == false)??</span><span lang="EN-US" style="font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormalCxSpMiddle" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;text-autospace:none">
<span lang="EN-US" style="font-size:10.0pt;font-family:
"Courier New";color:black">
</span><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#960000">then</span></b><span lang="EN-US" style="font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormalCxSpMiddle" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;text-autospace:none">
<span lang="EN-US" style="font-size:10.0pt;font-family:
"Courier New";color:black">
</span><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";
color:#960000">modify</span></b><span lang="EN-US" style="font-size:10.0pt;
font-family:"Courier New";color:black">($sprinkler){</span><span lang="EN-US" style="font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormalCxSpMiddle" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;text-autospace:none">
<span lang="EN-US" style="font-size:10.0pt;font-family:
"Courier New";color:black"> setStatus(</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";
color:green">true</span><span lang="EN-US" style="font-size:10.0pt;font-family:
"Courier New";color:black">)</span><span lang="EN-US" style="font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormalCxSpMiddle" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto">
<span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";
color:black"> };</span><span lang="EN-US" style="font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormalCxSpMiddle" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto">
<span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";
color:black">End</span><span lang="EN-US" style="font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D">Thomas<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D"><o:p> </o:p></span></p>
<div style="border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm 4.0pt">
<div>
<div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:
"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;
font-family:"Tahoma","sans-serif""> rules-users-bounces@lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org]
<b>On Behalf Of </b>Esteban Aliverti<br>
<b>Sent:</b> 09 June 2010 20:28<br>
<b>To:</b> Rules Users List<br>
<b>Subject:</b> Re: [rules-users] depicting array in rules<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span class="apple-style-span"><span style="font-family:"Arial","sans-serif"">One way could be:</span></span><span class="apple-style-span"><span style="font-size:
10.0pt;font-family:"Arial","sans-serif""><o:p></o:p></span></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Courier New";
color:#960000">when</span></b><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New""> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";
color:black"> Fire($room : room)</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";
color:black"> $sprinkler : Sprinkler(room contains $room)</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";
color:black"> Room (this == $room, someField == "SomeValue")</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";
color:black"> </span><b><span style="font-size:10.0pt;font-family:"Courier New";color:#960000">then</span></b><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";
color:black"> </span><b><span style="font-size:10.0pt;font-family:"Courier New";color:#960000">modify</span></b><span style="font-size:10.0pt;font-family:"Courier New";color:black">($sprinkler){</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";
color:black"> setStatus(</span><span style="font-size:10.0pt;font-family:"Courier New";
color:green">true</span><span style="font-size:10.0pt;font-family:"Courier New";
color:black">)</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";
color:black"> };</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";
color:black">End</span><o:p></o:p></p>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">If you dont have the Room as a Fact Type, then:<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Courier New";
color:#960000">when</span></b><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New""> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";
color:black"> Fire($room : room)</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";
color:black"> $sprinkler : Sprinkler(room contains $room)</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";
color:black"> Room (someField == "SomeValue")from $room</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";
color:black"> </span><b><span style="font-size:10.0pt;font-family:"Courier New";color:#960000">then</span></b><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";
color:black"> </span><b><span style="font-size:10.0pt;font-family:"Courier New";color:#960000">modify</span></b><span style="font-size:10.0pt;font-family:"Courier New";color:black">($sprinkler){</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";
color:black"> setStatus(</span><span style="font-size:10.0pt;font-family:"Courier New";
color:green">true</span><span style="font-size:10.0pt;font-family:"Courier New";
color:black">)</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";
color:black"> };</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";
color:black">End</span><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span class="apple-style-span"><span style="font-family:"Arial","sans-serif"">I'm not 100% sure about this, but at least you can start from here</span></span><span style="font-family:"Arial","sans-serif""><br>
<br>
<span class="apple-style-span">Best</span></span><o:p></o:p></p>
<div>
<p class="MsoNormal">2010/6/9 Fnu Mahalakshmi <<a href="mailto:FMahalakshmi@nyx.com">FMahalakshmi@nyx.com</a>><o:p></o:p></p>
<div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">Hi,</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif""> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">Is there any way I can represent an array of values in my rules??</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">I want to do this:</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">Fire{</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">Room,</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">Status}</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">Sprinkler{</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">Object [] Room = new Room[]{new Room(),new room()}</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">Status</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">}</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">Room{</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">Name,</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">Number}</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif""> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">Rule “ if fire in room start sprinkler if room has sprinkler”</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">No-loop true</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
text-autospace:none">
<b><span lang="EN-US" style="font-size:10.0pt;font-family:
"Courier New";color:#960000">when</span></b><span lang="EN-US" style="font-size:
10.0pt;font-family:"Courier New";color:black">
</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
text-autospace:none">
<span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New""> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
text-autospace:none">
<span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";
color:black"> Fire($room : room)</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
text-autospace:none">
<span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";
color:black"> $sprinkler : Sprinkler( room == $room) # how can I search through the array of room values here???????</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
text-autospace:none">
<span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";
color:black">
</span><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#960000">then</span></b><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
text-autospace:none">
<span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";
color:black">
</span><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";
color:#960000">modify</span></b><span lang="EN-US" style="font-size:10.0pt;
font-family:"Courier New";color:black">($sprinkler){</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
text-autospace:none">
<span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";
color:black"> setStatus(</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";
color:green">true</span><span lang="EN-US" style="font-size:10.0pt;font-family:
"Courier New";color:black">)</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black"> };</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black">End</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black">Any Idea if that is possible to implement in rules???</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">I could do it with adding different instances of sprinkler and rooms. But I want to minimize the amount
of repetition in data stored and loaded into the working memory.</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif""> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">Any idea??</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">Thank you,</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">M</span><span lang="EN-US"><o:p></o:p></span></p>
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