/**
* @inheritDoc When a new tuple is asserted into an AccumulateNode, do this:
* <p>1. Select all matching objects from right memory 2. Execute the initialization code
* using the tuple + matching objects 3. Execute the accumulation code for each combination of
* tuple+object 4. Execute the return code 5. Create a new CalculatedObjectHandle for the
* resulting object and add it to the tuple 6. Propagate the tuple
* <p>The initialization, accumulation and return codes, in JBRules, are assembled into a
* generated method code and called once for the whole match, as you can see below:
* <p>Object result = this.accumulator.accumulate( ... );
*/
public void assertLeftTuple(
final LeftTuple leftTuple,
final PropagationContext context,
final InternalWorkingMemory workingMemory) {
final AccumulateMemory memory = (AccumulateMemory) workingMemory.getNodeMemory(this);
AccumulateContext accresult = new AccumulateContext();
boolean useLeftMemory = true;
if (!this.tupleMemoryEnabled) {
// This is a hack, to not add closed DroolsQuery objects
Object object = ((InternalFactHandle) leftTuple.get(0)).getObject();
if (!(object instanceof DroolsQuery) || !((DroolsQuery) object).isOpen()) {
useLeftMemory = false;
}
}
if (useLeftMemory) {
memory.betaMemory.getLeftTupleMemory().add(leftTuple);
leftTuple.setObject(accresult);
}
accresult.context = this.accumulate.createContext();
this.accumulate.init(memory.workingMemoryContext, accresult.context, leftTuple, workingMemory);
this.constraints.updateFromTuple(memory.betaMemory.getContext(), workingMemory, leftTuple);
RightTupleMemory rightMemory = memory.betaMemory.getRightTupleMemory();
FastIterator rightIt = getRightIterator(rightMemory);
for (RightTuple rightTuple = getFirstRightTuple(leftTuple, rightMemory, context, rightIt);
rightTuple != null;
rightTuple = (RightTuple) rightIt.next(rightTuple)) {
InternalFactHandle handle = rightTuple.getFactHandle();
if (this.constraints.isAllowedCachedLeft(memory.betaMemory.getContext(), handle)) {
// add a match
addMatch(
leftTuple, rightTuple, null, null, workingMemory, memory, accresult, useLeftMemory);
}
}
this.constraints.resetTuple(memory.betaMemory.getContext());
if (accresult.getAction() == null) {
evaluateResultConstraints(
ActivitySource.LEFT, leftTuple, context, workingMemory, memory, accresult, useLeftMemory);
} // else evaluation is already scheduled, so do nothing
}
