public void doLeftUpdates(
NotNode notNode,
LeftTupleSink sink,
BetaMemory bm,
InternalWorkingMemory wm,
LeftTupleSets srcLeftTuples,
LeftTupleSets trgLeftTuples,
LeftTupleSets stagedLeftTuples) {
LeftTupleMemory ltm = bm.getLeftTupleMemory();
RightTupleMemory rtm = bm.getRightTupleMemory();
ContextEntry[] contextEntry = bm.getContext();
BetaConstraints constraints = notNode.getRawConstraints();
boolean leftUpdateOptimizationAllowed = notNode.isLeftUpdateOptimizationAllowed();
for (LeftTuple leftTuple = srcLeftTuples.getUpdateFirst(); leftTuple != null; ) {
LeftTuple next = leftTuple.getStagedNext();
FastIterator rightIt = notNode.getRightIterator(rtm);
RightTuple firstRightTuple = notNode.getFirstRightTuple(leftTuple, rtm, null, rightIt);
// If in memory, remove it, because we'll need to add it anyway if it's not blocked, to ensure
// iteration order
RightTuple blocker = leftTuple.getBlocker();
if (blocker == null) {
if (leftTuple.getMemory()
!= null) { // memory can be null, if blocker was deleted in same do loop
ltm.remove(leftTuple);
}
} else {
// check if we changed bucket
if (rtm.isIndexed() && !rightIt.isFullIterator()) {
// if newRightTuple is null, we assume there was a bucket change and that bucket is empty
if (firstRightTuple == null || firstRightTuple.getMemory() != blocker.getMemory()) {
blocker.removeBlocked(leftTuple);
blocker = null;
}
}
}
constraints.updateFromTuple(contextEntry, wm, leftTuple);
if (!leftUpdateOptimizationAllowed && blocker != null) {
blocker.removeBlocked(leftTuple);
blocker = null;
}
// if we where not blocked before (or changed buckets), or the previous blocker no longer
// blocks, then find the next blocker
if (blocker == null
|| !constraints.isAllowedCachedLeft(contextEntry, blocker.getFactHandle())) {
if (blocker != null) {
// remove previous blocker if it exists, as we know it doesn't block any more
blocker.removeBlocked(leftTuple);
}
// find first blocker, because it's a modify, we need to start from the beginning again
for (RightTuple newBlocker = firstRightTuple;
newBlocker != null;
newBlocker = (RightTuple) rightIt.next(newBlocker)) {
if (constraints.isAllowedCachedLeft(contextEntry, newBlocker.getFactHandle())) {
leftTuple.setBlocker(newBlocker);
newBlocker.addBlocked(leftTuple);
break;
}
}
LeftTuple childLeftTuple = leftTuple.getFirstChild();
if (leftTuple.getBlocker() != null) {
// blocked
if (childLeftTuple != null) {
// blocked, with previous children, so must have not been previously blocked, so retract
// no need to remove, as we removed at the start
// to be matched against, as it's now blocked
childLeftTuple.setPropagationContext(
leftTuple
.getBlocker()
.getPropagationContext()); // we have the righttuple, so use it for the pctx
RuleNetworkEvaluator.deleteLeftChild(childLeftTuple, trgLeftTuples, stagedLeftTuples);
} // else: it's blocked now and no children so blocked before, thus do nothing
} else if (childLeftTuple == null) {
// not blocked, with no children, must have been previously blocked so assert
ltm.add(leftTuple); // add to memory so other fact handles can attempt to match
trgLeftTuples.addInsert(
sink.createLeftTuple(
leftTuple,
sink,
leftTuple.getPropagationContext(),
true)); // use leftTuple for the pctx here, as the right one is not available
// this won't cause a problem, as the trigger tuple (to the left) will be more recent
// anwyay
} else {
updateChildLeftTuple(childLeftTuple, stagedLeftTuples, trgLeftTuples);
// not blocked, with children, so wasn't previous blocked and still isn't so modify
ltm.add(leftTuple); // add to memory so other fact handles can attempt to match
childLeftTuple.reAddLeft();
}
}
leftTuple.clearStaged();
leftTuple = next;
}
constraints.resetTuple(contextEntry);
}