public void execute(InternalWorkingMemory workingMemory) {
leftTuple.setLeftTupleSink(this.node);
if (leftTuple.getFirstChild() == null) {
this.node.assertLeftTuple(leftTuple, context, workingMemory);
} else {
if (retract) {
this.node
.getSinkPropagator()
.propagateRetractLeftTuple(leftTuple, context, workingMemory);
} else {
this.node
.getSinkPropagator()
.propagateModifyChildLeftTuple(leftTuple, context, workingMemory, true);
}
}
if (leftTuple.getLeftParent() == null) {
// It's not an open query, as we aren't recording parent chains, so we need to clear out
// right memory
Object node = workingMemory.getNodeMemory(this.node);
RightTupleMemory rightMemory = null;
if (node instanceof BetaMemory) {
rightMemory = ((BetaMemory) node).getRightTupleMemory();
} else if (node instanceof AccumulateMemory) {
rightMemory = ((AccumulateMemory) node).betaMemory.getRightTupleMemory();
}
final TupleStartEqualsConstraint constraint = TupleStartEqualsConstraint.getInstance();
TupleStartEqualsConstraintContextEntry contextEntry =
new TupleStartEqualsConstraintContextEntry();
contextEntry.updateFromTuple(workingMemory, leftTuple);
FastIterator rightIt = rightMemory.fastIterator();
RightTuple temp = null;
for (RightTuple rightTuple =
rightMemory.getFirst(
leftTuple, (InternalFactHandle) context.getFactHandle(), rightIt);
rightTuple != null; ) {
temp = (RightTuple) rightIt.next(rightTuple);
if (constraint.isAllowedCachedLeft(contextEntry, rightTuple.getFactHandle())) {
rightMemory.remove(rightTuple);
}
rightTuple = temp;
}
}
}
