public void modifyActivation( final InternalFactHandle factHandle, final PropagationContext context, final InternalWorkingMemory workingMemory) { if (activationNode == null) { this.activationNode = objectTypeNodes.get(ClassObjectType.Activation_ObjectType); } if (activationNode != null) { ModifyPreviousTuples modifyPreviousTuples = new ModifyPreviousTuples(factHandle.getFirstLeftTuple(), factHandle.getFirstRightTuple()); factHandle.clearLeftTuples(); factHandle.clearRightTuples(); // There may be no queries defined this.activationNode.modifyObject(factHandle, modifyPreviousTuples, context, workingMemory); modifyPreviousTuples.retractTuples(context, workingMemory); } }
/** Retracts the corresponding tuple by retrieving and retracting the fact created for it */ public void retractLeftTuple( final LeftTuple tuple, final PropagationContext context, final InternalWorkingMemory workingMemory) { final ObjectHashMap memory = (ObjectHashMap) workingMemory.getNodeMemory(this); // retrieve handle from memory final InternalFactHandle factHandle = (InternalFactHandle) memory.remove(tuple); for (RightTuple rightTuple = factHandle.getFirstRightTuple(); rightTuple != null; rightTuple = (RightTuple) rightTuple.getHandleNext()) { rightTuple.getRightTupleSink().retractRightTuple(rightTuple, context, workingMemory); } factHandle.clearRightTuples(); for (LeftTuple leftTuple = factHandle.getLastLeftTuple(); leftTuple != null; leftTuple = (LeftTuple) leftTuple.getLeftParentNext()) { leftTuple.getLeftTupleSink().retractLeftTuple(leftTuple, context, workingMemory); } factHandle.clearLeftTuples(); }
/** * Retract the <code>FactHandleimpl</code> from the <code>Rete</code> network. Also remove the * <code>FactHandleImpl</code> from the node memory. * * @param rightTuple The fact handle. * @param object The object to assert. * @param workingMemory The working memory session. */ public void retractObject( final InternalFactHandle factHandle, final PropagationContext context, final InternalWorkingMemory workingMemory) { if (objectMemoryEnabled && !(queryNode && !((DroolsQuery) factHandle.getObject()).isOpen())) { final ObjectHashSet memory = (ObjectHashSet) workingMemory.getNodeMemory(this); memory.remove(factHandle); } for (RightTuple rightTuple = factHandle.getFirstRightTuple(); rightTuple != null; rightTuple = (RightTuple) rightTuple.getHandleNext()) { rightTuple.getRightTupleSink().retractRightTuple(rightTuple, context, workingMemory); } factHandle.clearRightTuples(); for (LeftTuple leftTuple = factHandle.getFirstLeftTuple(); leftTuple != null; leftTuple = (LeftTuple) leftTuple.getLeftParentNext()) { leftTuple.getLeftTupleSink().retractLeftTuple(leftTuple, context, workingMemory); } factHandle.clearLeftTuples(); }
public void modifyObject( final InternalFactHandle handle, final PropagationContext context, final ObjectTypeConf objectTypeConf, final InternalWorkingMemory workingMemory) { // 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()); handle.clearLeftTuples(); handle.clearRightTuples(); for (int i = 0, length = cachedNodes.length; i < length; i++) { cachedNodes[i].modifyObject(handle, modifyPreviousTuples, context, workingMemory); // 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 && rightTuple.getRightTupleSink() instanceof BetaNode && ((BetaNode) rightTuple.getRightTupleSink()).getObjectTypeNode() == cachedNodes[i]) { modifyPreviousTuples.removeRightTuple(); rightTuple = modifyPreviousTuples.peekRightTuple(); } } } modifyPreviousTuples.retractTuples(context, workingMemory); }