[rules-users] Retract in a function

[Ronald R. DiFrango]

Michael,

Those detail lines are in working memory for sure.  In fact the query it
self only works on working memory objects.

As far as I know you can not place the results of a queryResult in the LHS.

Ron

On 10/3/07, Anstis, Michael (M.) <manstis1 at ford.com> wrote:
>
>  Can you not get a reference to a DetailLine in the LHS?
>
> If you have not inserted DetailLine objects into working memory how can
> you expect to retract them?
>
> If you have inserted DetailLine's into working memory what does query
> "Open RTV Lines" return, can it be joined into the LHS? (or split into two
> rules)?
>
>  ------------------------------
> *From:* rules-users-bounces at lists.jboss.org [mailto:
> rules-users-bounces at lists.jboss.org] *On Behalf Of *Ronald R. DiFrango
> *Sent:* 03 October 2007 14:01
> *To:* Rules Users List
> *Subject:* [rules-users] Retract in a function
>
> All,
>
> I have the following function that I call from all of my rules.  When I
> execute this function, I need to retract that object from working memory.
> The problem is that when I insert the comment line below I get a compiler
> error saying that I can only issue a retract on fact handles.
>
> Here is an example of my rule plus the function:
>
> rule "QTY Percentage tolerance - Approval"
>     salience -25
>     no-loop  true
>     when
>         rtvHeader : RtvHeader( totalAmount : totalAmount, status not in (
> StatusConstants.MATCHED, StatusConstants.APPROVAL) )
>         repaymentCode : RepaymentCode( code == "QTY", matchApprv == "Y",
> tolDollar ==0, tolPercent != 0, tolPercent : tolPercent )
>         qtyOutput : QTYOutput( sumRTVQty : sumRTVQty , sumCmAndRnr :
> sumCmAndRnr )
>         eval( qtyPercentage(qtyOutput, totalAmount, tolPercent) )
>     then
>         System.out.println("QTY Percentage tolerance - No Approval");
>         rtvHeader.setStatus(StatusConstants.APPROVAL );
>         openRTVLines(drools.getWorkingMemory(), drools.getWorkingMemory().getQueryResults(
> "Open RTV Lines" ), StatusConstants.MATCHED_WITHIN_TOLERANCE);
> end
>
> function void openRTVLines(WorkingMemory workingMemory, QueryResults
> results, String status)
> {
>     System.out.println( "We have " + results.size() + " Open RTV Lines" );
>     for ( Iterator it = results.iterator(); it.hasNext(); ) {
>         QueryResult result = ( QueryResult ) it.next ();
>         DetailLine line = ( DetailLine ) result.get( "line" );
>         line.setStatus(status);
>
>         // I need to add this in
>         // workingMemory.retract(line);
>     }
> }
>
> Thanks in advance,
>
> Ron
>
>
>
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