Example #1
0
  public void modifyActivation(
      final InternalFactHandle factHandle,
      final PropagationContext context,
      final InternalWorkingMemory workingMemory) {
    if (activationNode == null) {
      this.activationNode = objectTypeNodes.get(ClassObjectType.Match_ObjectType);
    }

    if (activationNode != null) {
      ModifyPreviousTuples modifyPreviousTuples =
          new ModifyPreviousTuples(
              factHandle.getFirstLeftTuple(), factHandle.getFirstRightTuple(), unlinkingEnabled);
      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) {
    // retrieve handle from memory
    final InternalFactHandle factHandle = (InternalFactHandle) tuple.getObject();

    for (RightTuple rightTuple = factHandle.getFirstRightTuple();
        rightTuple != null;
        rightTuple = rightTuple.getHandleNext()) {
      rightTuple.getRightTupleSink().retractRightTuple(rightTuple, context, workingMemory);
    }
    factHandle.clearRightTuples();

    for (LeftTuple leftTuple = factHandle.getLastLeftTuple();
        leftTuple != null;
        leftTuple = leftTuple.getLeftParentNext()) {
      leftTuple.getLeftTupleSink().retractLeftTuple(leftTuple, context, workingMemory);
    }
    factHandle.clearLeftTuples();
  }
Example #3
0
  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);
  }