Yes :)<br><br><div class="gmail_quote">2011/5/9 Abhay B. Chaware <span dir="ltr"><<a href="mailto:Abhay.Chaware@kpitcummins.com">Abhay.Chaware@kpitcummins.com</a>></span><br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
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<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">Mike,</span></font></p>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></p>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">What I meant was, There are say 10 objects of RAM in memory whose type
is DDR. Now my “Product” object has a member variable named “compatibleRAMs”,
and I would like to set an arraylist containing these 10 objects to the “compatibleRAMs”
variable of “Product” object in memory.</span></font></p>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></p>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">I am reading about the “collect” which can be used to create
collections from fact objects in memory. Something like.</span></font></p>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></p>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">When </span></font></p>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> $prod
: Product (type==’laptop’)</span></font></p>
<p class="MsoNormal" style="text-indent: 0.5in;"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">$compatibleRAMs : ArrayList() from collect (RAM (type
== ‘DDR’)) </span></font></p>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">Then</span></font></p>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> $prod.setCompatibleRAMs($compatibleRAMs);</span></font></p>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></p>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">Am I on the right track ?</span></font></p>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></p>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">-abhay</span></font></p>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></p>
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</span></font></div>
<p class="MsoNormal"><b><font face="Tahoma" size="2"><span style="font-size: 10pt; font-family: Tahoma; font-weight: bold;">From:</span></font></b><font face="Tahoma" size="2"><span style="font-size: 10pt; font-family: Tahoma;">
<a href="mailto:rules-users-bounces@lists.jboss.org" target="_blank">rules-users-bounces@lists.jboss.org</a>
[mailto:<a href="mailto:rules-users-bounces@lists.jboss.org" target="_blank">rules-users-bounces@lists.jboss.org</a>] <b><span style="font-weight: bold;">On
Behalf Of </span></b>Michael Anstis<br>
<b><span style="font-weight: bold;">Sent:</span></b> Monday, May 09, 2011 3:52 PM<br>
<b><span style="font-weight: bold;">To:</span></b> Rules Users List<br>
<b><span style="font-weight: bold;">Subject:</span></b> Re: [rules-users] FW:
Basic rules question</span></font></p>
</div><div><div></div><div class="h5">
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></p>
<p class="MsoNormal" style="margin-bottom: 12pt;"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">Abhay,<br>
<br>
Do you need a list?<br>
<br>
You can assign RAM to COMPUTERS with this:-<br>
<br>
</span></font><font face="Courier New"><span style="font-family: "Courier New";">when<br>
$c : Computer( $type : type )<br>
$r : RAM( compatibleWith == $type )<br>
then<br>
$c.addRAM( $r );<br>
end<br>
</span></font><br>
This would add all RAM (in Working Memory) compatible with COMPUTER to computer.<br>
<br>
You could use a list of RAM as a Fact in WM and change your rule to use that:-<br>
<br>
<font face="Courier New"><span style="font-family: "Courier New";">when<br>
$l : MyList( )<br>
$c : Computer( $type : type )<br>
$r : RAM( compatibleWith == $type ) from $l<br>
then<br>
$c.addRAM( $r );<br>
end<br>
</span></font><br>
Or you can define a rule to construct the list too:-<br>
<br>
<font face="Courier New"><span style="font-family: "Courier New";">when<br>
$l : MyList( $t : typeRAM )<br>
RAM( $c : $t )<br>
then<br>
$l.add( $r )<br>
end</span></font><br>
<br>
I assume you'd need to differentiate different lists for different types; so I
have shown use of "MyList" which could subclass ArrayList and have a
"Type of RAM" attribute. Drools doesn't "do" generics.<br>
<br>
With kind regards,<br>
<br>
Mike</p>
<div>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">2011/5/9 Abhay B. Chaware <<a href="mailto:Abhay.Chaware@kpitcummins.com" target="_blank">Abhay.Chaware@kpitcummins.com</a>></span></font></p>
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<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">Wendy, </span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">Thanks for helping me out so far. </span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">I have another question. What if I have all my “RAM”
objects inserted into working memory. How should I write my
rule’s “when” portion to get a collection of all the RAM
objects matching type “DDR” ? In other words, can I get
collection of facts assigned to a variable and use it in the “then”
part ?</span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">Thanks</span></font></p>
<div>
<div>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">Abhay</span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">==================================</span></font></p>
<p class="MsoNormal"><b><font face="Tahoma" size="2"><span style="font-size: 10pt; font-family: Tahoma; font-weight: bold;">From:</span></font></b><font face="Tahoma" size="2"><span style="font-size: 10pt; font-family: Tahoma;"> <a href="mailto:rules-users-bounces@lists.jboss.org" target="_blank">rules-users-bounces@lists.jboss.org</a> [mailto:<a href="mailto:rules-users-bounces@lists.jboss.org" target="_blank">rules-users-bounces@lists.jboss.org</a>]
<b><span style="font-weight: bold;">On Behalf Of </span></b>Wendy Mungovan<br>
<b><span style="font-weight: bold;">Sent:</span></b> Friday, May 06, 2011 5:47 PM<br>
<b><span style="font-weight: bold;">To:</span></b> Rules Users List<br>
<b><span style="font-weight: bold;">Subject:</span></b> Re: [rules-users] Basic
rules question</span></font></p>
<p class="MsoNormal"><font color="black" face="Arial" size="3"><span style="font-size: 12pt; font-family: Arial; color: black;"> </span></font></p>
<p class="MsoNormal"><font color="black" face="Arial" size="3"><span style="font-size: 12pt; font-family: Arial; color: black;"> </span></font></p>
<p class="MsoNormal"><font color="black" face="Arial" size="3"><span style="font-size: 12pt; font-family: Arial; color: black;">Q2:<br>
So the rule would be something like:<br>
<br>
rule "RAM type"<br>
when<br>
$product: Product(type == "laptop");<br>
then<br>
//you are looking for the best way to set valid RAM
types in the then part of the rule?<br>
$product.setRamType("DDR");<br>
//or<br>
$product.setValidRamOptions( getValidRamOptions("DDR"));<br>
end<br>
<br>
where getValidRamOptions would be a custom function included through 'import
function' so you can then load the choices from some where else. Or if
RamOptions were an object in memory you could have a rule like:<br>
<br>
rule "RAM type"<br>
when<br>
$product: Product(type == "laptop");<br>
$ramOptions: RAMOptions(type == "DDR");<br>
<br>
then<br>
$product.setValidRamOptions( $ramOptions.getList());<br>
end<br>
<br>
<br>
<br>
<br>
Wendy</span></font></p>
<p class="MsoNormal"><font color="black" face="Arial" size="3"><span style="font-size: 12pt; font-family: Arial; color: black;"> </span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">==================================</span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<div>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">Regards,</span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 11pt; font-family: Arial; color: navy;"> </span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">Abhay Chaware</span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="1"><span style="font-size: 7.5pt; font-family: Arial; color: navy;">Sr. Designer | KPIT Cummins Infosystems Ltd | Board: +91 020 6652
5000 | Extn: 2989 | <a href="mailto:abhay.chaware@kpitcummins.com" target="_blank">abhay.chaware@kpitcummins.com</a> |<a href="http://www.kpitcummins.com" target="_blank">www.kpitcummins.com</a> </span></font></p>
<p class="MsoNormal"><font color="green" face="Webdings" size="5"><span style="font-size: 18pt; font-family: Webdings; color: green;">P</span></font><font color="black" face="Webdings" size="2"><span style="font-size: 11pt; font-family: Webdings; color: black;"> </span></font><font color="green" face="Tahoma" size="1"><span style="font-size: 7.5pt; font-family: Tahoma; color: green;">Please consider the environment before printing this e-mail</span></font></p>
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<hr size="2" width="100%" align="center">
</span></font></div>
<p class="MsoNormal"><b><font face="Tahoma" size="2"><span style="font-size: 10pt; font-family: Tahoma; font-weight: bold;">From:</span></font></b><font face="Tahoma" size="2"><span style="font-size: 10pt; font-family: Tahoma;"> <a href="mailto:rules-users-bounces@lists.jboss.org" target="_blank">rules-users-bounces@lists.jboss.org</a> [mailto:<a href="mailto:rules-users-bounces@lists.jboss.org" target="_blank">rules-users-bounces@lists.jboss.org</a>]
<b><span style="font-weight: bold;">On Behalf Of </span></b>Wendy Mungovan<br>
<b><span style="font-weight: bold;">Sent:</span></b> Friday, May 06, 2011 5:47 PM<br>
<b><span style="font-weight: bold;">To:</span></b> Rules Users List<br>
<b><span style="font-weight: bold;">Subject:</span></b> Re: [rules-users] Basic
rules question</span></font></p>
</div>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></p>
<div>
<p class="MsoNormal"><font face="Arial" size="3"><span style="font-size: 12pt; font-family: Arial;">Abhay,<br>
Q1: I think that this will depend on how many different products you
have. If there is a small number it is more straight forward to have a
rule for each one (so the 2nd option). This allows all you logic to be in
one place. If there are a large number of products and writing a rule for
each one is intractable you probably would want to look into some
generalizations of the rules. Is that helpful?<br>
<br>
Q2: I'm not quite sure what you are getting at in Q2. Are you
trying to write validation rules or rules that are modifying the facts?</span></font></p>
<div>
<p class="MsoNormal"><font face="Arial" size="3"><span style="font-size: 12pt; font-family: Arial;"> </span></font></p>
</div>
<div>
<p class="MsoNormal" style="margin-bottom: 12pt;"><font face="Arial" size="3"><span style="font-size: 12pt; font-family: Arial;">Wendy</span></font></p>
<div>
<div class="MsoNormal" style="text-align: center;" align="center"><font face="Tahoma" size="2"><span style="font-size: 10pt; font-family: Tahoma;">
<hr size="1" width="100%" align="center">
</span></font></div>
<p class="MsoNormal" style="margin-bottom: 12pt;"><b><font face="Tahoma" size="2"><span style="font-size: 10pt; font-family: Tahoma; font-weight: bold;">From:</span></font></b><font face="Tahoma" size="2"><span style="font-size: 10pt; font-family: Tahoma;"> Abhay B. Chaware <<a href="mailto:Abhay.Chaware@kpitcummins.com" target="_blank">Abhay.Chaware@kpitcummins.com</a>><br>
<b><span style="font-weight: bold;">To:</span></b> "<a href="mailto:rules-users@lists.jboss.org" target="_blank">rules-users@lists.jboss.org</a>"
<<a href="mailto:rules-users@lists.jboss.org" target="_blank">rules-users@lists.jboss.org</a>><br>
<b><span style="font-weight: bold;">Sent:</span></b> Fri, May 6, 2011 4:59:46 AM<br>
<b><span style="font-weight: bold;">Subject:</span></b> [rules-users] Basic rules
question</span></font></p>
<div>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">Hi </span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;"> </span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">I am a
newbie to rule based applications and trying to get the concept of rules. I
have couple of questions about rules to start with, not specifically about
Drools though.</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;"> </span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">Q1 - Should
rules be data/model specific or can/should they be generic or both</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">==========================================================</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">e.g. </span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">If selected
product “TYPE” is “laptop”, then category
“RAM” should have all “DDR” type items compatible (
selecting items matching certain property )</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">OR</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">If selected
product is “IBM T42”, then category “RAM” should have
“512MB DDR” , “1024MB DDR”, “2048MB
DDR” compatible. ( assigning individual items in rules )</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">OR</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">Combination
of both</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;"> </span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;"> </span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">Q2 –
How should be the data modeled in above case</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">==========================================================</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">e.g. </span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">in product
master, each item ( e.g. T40, T42 ) should have a “TYPE” ( e.g.
desktop or laptop ) , all items in category “RAM” should have a
“TYPE” ( e.g. DDR ) and then control the assignment of RAM options
to the PRODUCT through Rule using “DDR” type ?</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">OR</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">in product
master, each item ( e.g. T40, T42 ) should have a “TYPE” ( e.g.
desktop or laptop ) , all items in category “RAM” should have
a “compatibleProduct” column ( e.g. desktop or laptop ) and control
the assignment of RAM to PRODUCT through “dynamic” rules by
selecting all the RAMs by passing the “TYPE” of the product to the
database handler.</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;"> </span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">Am I making
my point clear ?</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;"> </span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">Thanks</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">Abhay</span></font></p>
</div>
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