/**
* Retract a fact object from this <code>RuleBase</code> and the specified <code>WorkingMemory
* </code>.
*
* @param handle The handle of the fact to retract.
* @param workingMemory The working memory session.
*/
public void retractObject(
final InternalFactHandle handle,
final PropagationContext context,
final ObjectTypeConf objectTypeConf,
final InternalWorkingMemory workingMemory) {
if (log.isTraceEnabled()) {
log.trace("Delete {}", handle.toString());
}
ObjectTypeNode[] cachedNodes = objectTypeConf.getObjectTypeNodes();
if (cachedNodes == null) {
// it is possible that there are no ObjectTypeNodes for an object being retracted
return;
}
for (int i = 0; i < cachedNodes.length; i++) {
cachedNodes[i].retractObject(handle, context, workingMemory);
}
}
public void assertObject(
final InternalFactHandle handle,
final PropagationContext context,
final ObjectTypeConf objectTypeConf,
final InternalWorkingMemory workingMemory) {
if (log.isTraceEnabled()) {
log.trace("Insert {}", handle.toString());
}
// checks if shadow is enabled
if (objectTypeConf.isShadowEnabled()) {
// the user has implemented the ShadowProxy interface, let their implementation
// know it is safe to update the information the engine can see.
((ShadowProxy) handle.getObject()).updateProxy();
}
ObjectTypeNode[] cachedNodes = objectTypeConf.getObjectTypeNodes();
for (int i = 0, length = cachedNodes.length; i < length; i++) {
cachedNodes[i].assertObject(handle, context, workingMemory);
}
}
public void modifyObject(
final InternalFactHandle handle,
final PropagationContext context,
final ObjectTypeConf objectTypeConf,
final InternalWorkingMemory wm) {
if (log.isTraceEnabled()) {
log.trace("Update {}", handle.toString());
}
// checks if shadow is enabled
if (objectTypeConf.isShadowEnabled()) {
// the user has implemented the ShadowProxy interface, let their implementation
// know it is safe to update the information the engine can see.
((ShadowProxy) handle.getObject()).updateProxy();
}
ObjectTypeNode[] cachedNodes = objectTypeConf.getObjectTypeNodes();
// make a reference to the previous tuples, then null then on the handle
ModifyPreviousTuples modifyPreviousTuples =
new ModifyPreviousTuples(
handle.getFirstLeftTuple(), handle.getFirstRightTuple(), unlinkingEnabled);
handle.clearLeftTuples();
handle.clearRightTuples();
for (int i = 0, length = cachedNodes.length; i < length; i++) {
cachedNodes[i].modifyObject(handle, modifyPreviousTuples, context, wm);
// remove any right tuples that matches the current OTN before continue the modify on the next
// OTN cache entry
if (i < cachedNodes.length - 1) {
RightTuple rightTuple = modifyPreviousTuples.peekRightTuple();
while (rightTuple != null
&& ((BetaNode) rightTuple.getRightTupleSink()).getObjectTypeNode() == cachedNodes[i]) {
modifyPreviousTuples.removeRightTuple();
if (unlinkingEnabled) {
BetaMemory bm = BetaNode.getBetaMemory((BetaNode) rightTuple.getRightTupleSink(), wm);
BetaNode.doDeleteRightTuple(rightTuple, wm, bm);
} else {
((BetaNode) rightTuple.getRightTupleSink()).retractRightTuple(rightTuple, context, wm);
}
rightTuple = modifyPreviousTuples.peekRightTuple();
}
LeftTuple leftTuple;
ObjectTypeNode otn;
while (true) {
leftTuple = modifyPreviousTuples.peekLeftTuple();
otn = null;
if (leftTuple != null) {
LeftTupleSink leftTupleSink = leftTuple.getLeftTupleSink();
if (leftTupleSink instanceof LeftTupleSource) {
otn = ((LeftTupleSource) leftTupleSink).getLeftTupleSource().getObjectTypeNode();
} else if (leftTupleSink instanceof RuleTerminalNode) {
otn = ((RuleTerminalNode) leftTupleSink).getObjectTypeNode();
}
}
if (otn == null || otn == cachedNodes[i + 1]) break;
modifyPreviousTuples.removeLeftTuple();
if (unlinkingEnabled) {
LeftInputAdapterNode liaNode =
(LeftInputAdapterNode) leftTuple.getLeftTupleSink().getLeftTupleSource();
LiaNodeMemory lm = (LiaNodeMemory) wm.getNodeMemory(liaNode);
LeftInputAdapterNode.doDeleteObject(
leftTuple, context, lm.getSegmentMemory(), wm, liaNode, true, lm);
} else {
leftTuple.getLeftTupleSink().retractLeftTuple(leftTuple, context, wm);
}
}
}
}
modifyPreviousTuples.retractTuples(context, wm);
}