[rules-users] Removing Special Characters

[Swindells, Thomas]

It will work but it isn't at all declarative but instead very procedural - it is effectively the same as retrieving all the rows from the database and then filtering them yourself.
You've also failed to inform drools that you have updated the CustomerInfo object.
Assuming customerName is a string in terms of java code it is also extremely inefficient and verbose (and badly broken as data isn't defined).
String has the replace and replaceAll methods to replace characters far more efficiently than the approach below.

I'd probably have something like

Rule "Wild char validation"
When
        c: CustomerInfo(name : customerName matches ".*([\*#].*") //any string containing a * or a #
then
        modify(c) {
                setCustomerName(name.replaceAll("[\*#]", "")); //replace any * or # with ""
        }
end

if you don't like regex you could also do

Rule "Wild char validation"
When
        c: CustomerInfo(eval(customerName.contains("*") || customerName.contains("#"))) //any string containing a * or a #
then
        String name = c.getCustomerName();
        name = name.replace("#","");
        name = name.replace("*","");
        modify(c) {
                setCustomerName(name);
        }
end

other similar variations are available - depending on your throughput you may want to experiment with whether there are many differences in terms of performance.

Thomas

> -----Original Message-----
> From: rules-users-bounces at lists.jboss.org [mailto:rules-users-
> bounces at lists.jboss.org] On Behalf Of Lalitha
> Sent: 03 January 2012 12:02
> To: rules-users at lists.jboss.org
> Subject: [rules-users] Removing Special Characters
>
> Hi all,
>
>   I am working on drools. I would like to remove Special characters which are
> existed in the data i.e. replacing special characters with null.
> Following is the code:
>
> rule "Wild Character validation"
>   when
>     c : CustomerInfo(customerName != "");
>
>   then
>
>    int l = c.length();
>    int ch = 0;
>    int i = 0;
>    for (i = 0; i < l; i++) {
>       if (data.charAt(i) != "*"|| data.charAt(i) != "#"){
>          continue;
>         }
>         ch++;
>         data.setCharAt(i, "");
>       }
>    c.setCustomerName(data);
> end
>
> Is there any wrong in this code? If so please help me out. Waiting for your
> suggestion .
>
> Thanks and Regards,
> Lalitha.
>
> --
> View this message in context: http://drools.46999.n3.nabble.com/Removing-
> Special-Characters-tp3628821p3628821.html
> Sent from the Drools: User forum mailing list archive at Nabble.com.
> _______________________________________________
> rules-users mailing list
> rules-users at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users


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