[jboss-svn-commits] JBL Code SVN: r32329 - labs/jbossrules/trunk/drools-planner/drools-planner-examples/src/main/resources/org/drools/planner/examples/nurserostering/solver.

[jboss-svn-commits at lists.jboss.org]

Author: ge0ffrey
Date: 2010-03-31 14:04:51 -0400 (Wed, 31 Mar 2010)
New Revision: 32329

Modified:
   labs/jbossrules/trunk/drools-planner/drools-planner-examples/src/main/resources/org/drools/planner/examples/nurserostering/solver/nurseRosteringScoreRules.drl
Log:
nurse rostering: oneShiftPerDay

Modified: labs/jbossrules/trunk/drools-planner/drools-planner-examples/src/main/resources/org/drools/planner/examples/nurserostering/solver/nurseRosteringScoreRules.drl
===================================================================
--- labs/jbossrules/trunk/drools-planner/drools-planner-examples/src/main/resources/org/drools/planner/examples/nurserostering/solver/nurseRosteringScoreRules.drl	2010-03-31 16:47:34 UTC (rev 32328)
+++ labs/jbossrules/trunk/drools-planner/drools-planner-examples/src/main/resources/org/drools/planner/examples/nurserostering/solver/nurseRosteringScoreRules.drl	2010-03-31 18:04:51 UTC (rev 32329)
@@ -35,15 +35,27 @@
     when
         $shift : Shift(requiredEmployeeSize > 0, $requiredEmployeeSize : requiredEmployeeSize);
 
-        $totalEmployeeSize : Number(intValue < $requiredEmployeeSize) from accumulate(
+        $totalEmployeeSize : Number(intValue != $requiredEmployeeSize) from accumulate(
             $assignment : EmployeeAssignment(shift == $shift),
             count($assignment)
         );
     then
-        insertLogical(new IntConstraintOccurrence("requiredEmployeeSizePerShift",
-                ConstraintType.NEGATIVE_HARD, $requiredEmployeeSize - $totalEmployeeSize.intValue(), $shift));
+        insertLogical(new IntConstraintOccurrence("requiredEmployeeSizePerShift", ConstraintType.NEGATIVE_HARD,
+                Math.abs($requiredEmployeeSize - $totalEmployeeSize.intValue()),
+                $shift));
 end
 
+// a nurse can only work one shift per day, i.e. no two shift can be assigned to the same nurse on a day.
+rule "oneShiftPerDay"
+    when
+        $leftEmployeeAssignment : EmployeeAssignment($leftId : id, $employee : employee, $shiftDate : shiftDate);
+        $rightEmployeeAssignment : EmployeeAssignment(employee == $employee, shiftDate == $shiftDate, id > $leftId);
+    then
+        insertLogical(new IntConstraintOccurrence("oneShiftPerDay", ConstraintType.NEGATIVE_HARD,
+                1,
+                $leftEmployeeAssignment, $rightEmployeeAssignment));
+end
+
 // ############################################################################
 // Soft constraints
 // ############################################################################