[rules-users] Retract in a function

[Ronald R. DiFrango]

I have now tried the following and it did not seem to have the intended
result of removing the detail line from working memory:

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);

        // Now retract those objects from Working Memory
        FactHandle[] handles = result.getFactHandles();
        System.out.println("handles.length : " + handles.length);
        for(int i = 0; i < handles.length; i++)
        {
            System.out.println("Retracting : ");
            workingMemory.retract(handles[i]);
        }
    }
}

Any other thoughts out there?

On 10/3/07, Ronald R. DiFrango <ron.difrango at gmail.com> wrote:
>
> 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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