如何从drl Drools中的累积返回列表? [英] How to return a list from inside of accumulate in drl Drools?
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问题描述
这是我的规则
rule "Multiple bookings via same mobile"
when
(stayDateGroupingIteration : StayDateGroupingDto($stayGroupedBookings : stayGroupedBookings)) and (QueryTypeDto( queryType == "multiple" ))
$travellerCount :Number() from accumulate(BookingSummaryDtoList( $bookingSummaryDtoList : bookingSummaryDtoList) from $stayGroupedBookings,
init( int count=0; List<String> globalList= new ArrayList(); Set<String> duplicateSet=new HashSet();),
action(
for(Object bookingSummary : $bookingSummaryDtoList)
{
if(((BookingSummaryDto)bookingSummary).getTravellerId()!=null)
{
String travellerId=((BookingSummaryDto)bookingSummary).getTravellerId().toString();
Set<String> finalDuplicateSet=MultiBookingFraudServiceImpl.checkDuplicates(travellerId,globalList,duplicateSet);
count=count+1;
}
}
),
result( new Integer(count)))
then
//some action to be taken here
System.out.println($travellerCount);
end
我该如何退货
finalDuplicateSet
finalDuplicateSet
从累加代替计数,我也不想在我的java类中使用任何全局变量或静态变量.可以做到吗?还是需要采取其他方法?
from the accumulate in place of count, I don't want to use any global variables or static variables in my java class also. can this be done or do I need to follow some other approach?
推荐答案
希望此代码帮助您获得所需的内容:
Hope this code Help you in getting what you want :
rule "Multiple bookings via same mobile"
when
(stayDateGroupingIteration : StayDateGroupingDto($stayGroupedBookings : stayGroupedBookings)) and (QueryTypeDto( queryType == "multiple" ))
$duplicateTravellerList :List() from accumulate(BookingSummaryDtoList( $bookingSummaryDtoList : bookingSummaryDtoList) from $stayGroupedBookings,
init( int count=0; List<String> globalList= new ArrayList(); Set<String> duplicateSet=new HashSet(); List<String> finalDuplicateSet=new ArrayList();),
action(
for(Object bookingSummary : $bookingSummaryDtoList)
{
if(((BookingSummaryDto)bookingSummary).getTravellerId()!=null)
{
String travellerId=((BookingSummaryDto)bookingSummary).getTravellerId().toString();
finalDuplicateSet.add(MultiBookingFraudServiceImpl.checkDuplicates(travellerId,globalList,duplicateSet));
count=count+1;
}
}
),
result( new ArrayList(finalDuplicateSet)))
then
//some action to be taken here
System.out.println($duplicateTravellerList);
end
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