[rules-users] Firing the rules in a sequence for all the items in an ArrayList.

[Wolfgang Laun]

The rule you've shown will fire for all 4 elements created from the 4
rows of your table.

Something might have gone wrong while constructing the objects or the list.

To see what you have, add this rule, which should print the IDs of all
DailyPLC objects.

rule show
    when
        plc : DailyPLC();
    then
        System.out.println(" ID " + plc.getId()+ " at row : " +
plc.getRowNumber());
end

-W

On 12/06/2012, Amal Gupta <Amal_Gupta at infosys.com> wrote:
> Hi Wolfgang,
>
> Thanks for your response.
>
> Here is the rule that I had written for the file.
>
> rule "Id != value"
>
>     when
>         plc : DailyPLC(Id!="1794");
>     then
>         System.out.println("Incorrect ID " + plc.getId()+ " at row : " +
> plc.getRowNumber());
> end
>
> Any pointers shall be really very helpful.
>
>
>
> Regards,
>
> Amal
>
>
>
> -----Original Message-----
> From: rules-users-bounces at lists.jboss.org
> [mailto:rules-users-bounces at lists.jboss.org] On Behalf Of Wolfgang Laun
> Sent: Tuesday, June 12, 2012 3:57 PM
> To: Rules Users List
> Subject: Re: [rules-users] Firing the rules in a sequence for all the items
> in an ArrayList.
>
>
>
> Your question can't be answered without the rules. - If your Java code does
> what you say it does, then it should be OK.
>
> -W
>
>
>
>
>
> On 12/06/2012, Amal Gupta
> <Amal_Gupta at infosys.com<mailto:Amal_Gupta at infosys.com>> wrote:
>
>> Hello,
>
>>
>
>> I am new to Java and Drools and have a doubt regarding the sequence of
>
>> rules' execution as stated below :-
>
>>
>
>> Scenario:- I have a scenario wherein I have to apply multiple rules on
>
>> multiple columns coming in a file. To simulate that I created a 2-D
>
>> array as follows
>
>>
>
>> String[][] data =  {
>
>>
>> {"1791","8459625","78458745","20120610","20120610"
>
>> },
>
>>
>> {"1792","8459623","78458745","20120610","20120610"
>
>> },
>
>>
>> {"1793","8459624","78458745","20120610","20120610"
>
>> },
>
>>
>
>> {"17944","8459626","78458745","20120610","20120610"}
>
>>                   };
>
>>
>
>> Here each column of corresponds to a member for the following class
>
>>
>
>> public class DailyPLC {
>
>>
>
>>       private String Id;    // This value will correspond to data[i][0]
>
>>       private String productCode; // This value will correspond to
>
>> data[i][1]
>
>>       private String customerCode; // This value will correspond to
>
>> data[i][2]
>
>>       private String date1; // This value will correspond to data[i][3]
>
>>       private String date2; // This value will correspond to
>
>> data[i][4]
>
>>
>
>>       private int rowNumber; // The row number to keep a track of row
>
>> for which the record exists
>
>>
>
>>       /*Getters and Setters defined for each of them*/ }
>
>>
>
>> I have to perform checks on each of the columns, and the intent is to
>
>> create all the rules that I need for the entire array and save it in a
>
>> single drl file. Also, at the execution time, all the rules should be
>
>> applied - either at once or sequentially - to all the rows of the data.
>
>>
>
>> Approach:-  I tried the following
>
>>
>
>> 1.       Created an ArrayList
>
>>
>
>> ArrayList<DailyPLC> alPLCArrayList = new ArrayList<DailyPLC>();
>
>>
>
>>
>
>>
>
>> 2.       Iterated over the data and stored each row into a field of the
>
>> object of DailyPLC class.
>
>>
>
>> 3.       For every iteration, added the object into the array list.
>
>>
>
>>
>
>>
>
>> alPLCArrayList.add(plcToday);  // The plcToday is the object of the
>
>> DailyPLC class
>
>>
>
>>
>
>>
>
>> 4.       When executing the rules, I am adding all the items of the
>
>> ArrayList one by one and adding into the Knowledge Session.
>
>>
>
>>
>
>>
>
>> for(DailyPLC d : alPLCArrayList)
>
>>
>
>>             {
>
>>
>
>>            ksession.insert(d);
>
>>
>
>>             }
>
>>
>
>>
>
>>
>
>> Problem Faced :- The problem that I faced is that when I do
>
>> FireAllRules, the rule only validates the last record. The intent is
>
>> that it should traverse the list and give a result for all the members of
>> the list.
>
>> Have I missed something here?
>
>>
>
>> Please assist.  Let me know in case you need any more information
>
>>
>
>> Thanks in Advance,
>
>> Amal Gupta
>
>>
>
>>
>
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