public static void writeLeftTuples(
MarshallerWriteContext context, InternalFactHandle[] factHandles) throws IOException {
ObjectOutputStream stream = context.stream;
InternalWorkingMemory wm = context.wm;
// Write out LeftTuples
// context.out.println( "LeftTuples Start" );
for (InternalFactHandle handle : factHandles) {
// InternalFactHandle handle = (InternalFactHandle) it.next();
for (LeftTuple leftTuple = handle.getFirstLeftTuple();
leftTuple != null;
leftTuple = (LeftTuple) leftTuple.getLeftParentNext()) {
stream.writeShort(PersisterEnums.LEFT_TUPLE);
int sinkId = leftTuple.getLeftTupleSink().getId();
stream.writeInt(sinkId);
stream.writeInt(handle.getId());
// context.out.println( "LeftTuple sinkId:" + leftTuple.getLeftTupleSink().getId() + "
// handleId:" + handle.getId() );
writeLeftTuple(leftTuple, context, true);
}
}
stream.writeShort(PersisterEnums.END);
// context.out.println( "LeftTuples End" );
}
private void addMatch(
final LeftTuple leftTuple,
final RightTuple rightTuple,
final LeftTuple currentLeftChild,
final LeftTuple currentRightChild,
final InternalWorkingMemory workingMemory,
final AccumulateMemory memory,
final AccumulateContext accresult,
final boolean useLeftMemory) {
LeftTuple tuple = leftTuple;
InternalFactHandle handle = rightTuple.getFactHandle();
if (this.unwrapRightObject) {
// if there is a subnetwork, handle must be unwrapped
tuple = (LeftTuple) handle.getObject();
// handle = tuple.getLastHandle();
}
this.accumulate.accumulate(
memory.workingMemoryContext, accresult.context, tuple, handle, workingMemory);
// in sequential mode, we don't need to keep record of matched tuples
if (useLeftMemory) {
// linking left and right by creating a new left tuple
createLeftTuple(leftTuple, rightTuple, currentLeftChild, currentRightChild, this, true);
}
}
/**
* 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 (context.getType() == PropagationContext.MODIFICATION
&& this.skipOnModify
&& context.getDormantActivations() == 0) {
return;
}
if (this.objectMemoryEnabled) {
final ObjectHashSet memory = (ObjectHashSet) workingMemory.getNodeMemory(this);
memory.remove(factHandle);
}
for (RightTuple rightTuple = factHandle.getRightTuple();
rightTuple != null;
rightTuple = (RightTuple) rightTuple.getHandleNext()) {
rightTuple.getRightTupleSink().retractRightTuple(rightTuple, context, workingMemory);
}
factHandle.setRightTuple(null);
for (LeftTuple leftTuple = factHandle.getLeftTuple();
leftTuple != null;
leftTuple = (LeftTuple) leftTuple.getLeftParentNext()) {
leftTuple.getLeftTupleSink().retractLeftTuple(leftTuple, context, workingMemory);
}
factHandle.setLeftTuple(null);
}
/**
* OTN needs to override remove to avoid releasing the node ID, since OTN are never removed from
* the rulebase in the current implementation
*/
protected void doRemove(
final RuleRemovalContext context,
final ReteooBuilder builder,
final BaseNode node,
final InternalWorkingMemory[] workingMemories) {
if (context.getCleanupAdapter() != null) {
for (InternalWorkingMemory workingMemory : workingMemories) {
CleanupAdapter adapter = context.getCleanupAdapter();
final ObjectHashSet memory = (ObjectHashSet) workingMemory.getNodeMemory(this);
Iterator it = memory.iterator();
for (ObjectEntry entry = (ObjectEntry) it.next();
entry != null;
entry = (ObjectEntry) it.next()) {
InternalFactHandle handle = (InternalFactHandle) entry.getValue();
for (LeftTuple leftTuple = handle.getFirstLeftTuple();
leftTuple != null;
leftTuple = leftTuple.getLeftParentNext()) {
adapter.cleanUp(leftTuple, workingMemory);
}
}
}
context.setCleanupAdapter(null);
}
if (!node.isInUse()) {
removeObjectSink((ObjectSink) node);
}
}
/**
*
*
* <pre>
*
*
* ( Cheese (type "cheddar") )
*
*
* </pre>
*
* This is currently the same as using a ReturnValueConstraint just that it doesn't need any
* requiredDeclarations
*
* @throws IntrospectionException
*/
public void testLiteralConstraint() throws IntrospectionException {
final ReteooRuleBase ruleBase = (ReteooRuleBase) RuleBaseFactory.newRuleBase();
final InternalWorkingMemory workingMemory =
(InternalWorkingMemory) ruleBase.newStatefulSession();
final ClassFieldExtractor extractor =
cache.getExtractor(Cheese.class, "type", getClass().getClassLoader());
final FieldValue field = FieldFactory.getFieldValue("cheddar");
final Evaluator evaluator = ValueType.STRING_TYPE.getEvaluator(Operator.EQUAL);
final LiteralConstraint constraint = new LiteralConstraint(extractor, evaluator, field);
final ContextEntry context = constraint.createContextEntry();
final Cheese cheddar = new Cheese("cheddar", 5);
final InternalFactHandle cheddarHandle = (InternalFactHandle) workingMemory.insert(cheddar);
// check constraint
assertTrue(constraint.isAllowed(cheddarHandle.getObject(), workingMemory, context));
final Cheese stilton = new Cheese("stilton", 5);
final InternalFactHandle stiltonHandle = (InternalFactHandle) workingMemory.insert(stilton);
// check constraint
assertFalse(constraint.isAllowed(stiltonHandle.getObject(), workingMemory, context));
}
public static Map<String, Object> valuesAsMap(
Object object,
InternalWorkingMemory workingMemory,
LeftTuple leftTuple,
Declaration[] declarations) {
if (declarations.length == 0) {
return null;
}
Map<String, Object> map = new HashMap<String, Object>();
for (Declaration declaration : declarations) {
if (leftTuple == null) {
map.put(
declaration.getBindingName(),
declaration.getExtractor().getValue(workingMemory, object));
} else {
InternalFactHandle fact = leftTuple.get(declaration);
map.put(
declaration.getBindingName(),
declaration
.getExtractor()
.getValue(workingMemory, fact != null ? fact.getObject() : object));
}
}
return map;
}
/**
* When L&R Unlinking is enabled, updateSink() is used to populate a node's memory, but it has to
* take into account if it's propagating.
*/
private void updateLRUnlinking(
final ObjectSink sink,
final PropagationContext context,
final InternalWorkingMemory workingMemory) {
final ObjectHashSet memory = (ObjectHashSet) workingMemory.getNodeMemory(this);
Iterator it = memory.iterator();
InternalFactHandle ctxHandle = (InternalFactHandle) context.getFactHandle();
if (!context.isPropagating(this)
|| (context.isPropagating(this) && context.shouldPropagateAll())) {
for (ObjectEntry entry = (ObjectEntry) it.next();
entry != null;
entry = (ObjectEntry) it.next()) {
// Assert everything
sink.assertObject((InternalFactHandle) entry.getValue(), context, workingMemory);
}
} else {
for (ObjectEntry entry = (ObjectEntry) it.next();
entry != null;
entry = (ObjectEntry) it.next()) {
InternalFactHandle handle = (InternalFactHandle) entry.getValue();
// Exclude the current fact propagation
if (handle.getId() != ctxHandle.getId()) {
sink.assertObject(handle, context, workingMemory);
}
}
}
}
private static ProtobufMessages.NodeMemory writeRIANodeMemory(
final int nodeId, final Memory memory) {
// for RIA nodes, we need to store the ID of the created handles
RIAMemory mem = (RIAMemory) memory;
if (!mem.memory.isEmpty()) {
ProtobufMessages.NodeMemory.RIANodeMemory.Builder _ria =
ProtobufMessages.NodeMemory.RIANodeMemory.newBuilder();
final org.drools.core.util.Iterator it = mem.memory.iterator();
// iterates over all propagated handles and assert them to the new sink
for (ObjectEntry entry = (ObjectEntry) it.next();
entry != null;
entry = (ObjectEntry) it.next()) {
LeftTuple leftTuple = (LeftTuple) entry.getKey();
InternalFactHandle handle = (InternalFactHandle) entry.getValue();
FactHandle _handle =
ProtobufMessages.FactHandle.newBuilder()
.setId(handle.getId())
.setRecency(handle.getRecency())
.build();
_ria.addContext(
ProtobufMessages.NodeMemory.RIANodeMemory.RIAContext.newBuilder()
.setTuple(PersisterHelper.createTuple(leftTuple))
.setResultHandle(_handle)
.build());
}
return ProtobufMessages.NodeMemory.newBuilder()
.setNodeId(nodeId)
.setNodeType(ProtobufMessages.NodeMemory.NodeType.RIA)
.setRia(_ria.build())
.build();
}
return null;
}
/**
* Removes a match between left and right tuple
*
* @param rightTuple
* @param match
* @param result
*/
private void removeMatch(
final RightTuple rightTuple,
final LeftTuple match,
final InternalWorkingMemory workingMemory,
final AccumulateMemory memory,
final AccumulateContext accctx,
final boolean reaccumulate) {
// save the matching tuple
LeftTuple leftTuple = match.getLeftParent();
if (match != null) {
// removing link between left and right
match.unlinkFromLeftParent();
match.unlinkFromRightParent();
}
// if there is a subnetwork, we need to unwrap the object from inside the tuple
InternalFactHandle handle = rightTuple.getFactHandle();
LeftTuple tuple = leftTuple;
if (this.unwrapRightObject) {
tuple = (LeftTuple) handle.getObject();
// handle = tuple.getLastHandle();
}
if (this.accumulate.supportsReverse()) {
// just reverse this single match
this.accumulate.reverse(
memory.workingMemoryContext, accctx.context, tuple, handle, workingMemory);
} else {
// otherwise need to recalculate all matches for the given leftTuple
if (reaccumulate) {
reaccumulateForLeftTuple(leftTuple, workingMemory, memory, accctx);
}
}
}
public static void readTruthMaintenanceSystem(MarshallerReaderContext context)
throws IOException {
ObjectInputStream stream = context.stream;
TruthMaintenanceSystem tms = context.wm.getTruthMaintenanceSystem();
while (stream.readShort() == PersisterEnums.EQUALITY_KEY) {
int status = stream.readInt();
int factHandleId = stream.readInt();
InternalFactHandle handle = (InternalFactHandle) context.handles.get(factHandleId);
// ObjectTypeConf state is not marshalled, so it needs to be re-determined
ObjectTypeConf typeConf =
context
.wm
.getObjectTypeConfigurationRegistry()
.getObjectTypeConf(context.wm.getEntryPoint(), handle.getObject());
if (!typeConf.isTMSEnabled()) {
typeConf.enableTMS();
}
EqualityKey key = new EqualityKey(handle, status);
handle.setEqualityKey(key);
while (stream.readShort() == PersisterEnums.FACT_HANDLE) {
factHandleId = stream.readInt();
handle = (InternalFactHandle) context.handles.get(factHandleId);
key.addFactHandle(handle);
handle.setEqualityKey(key);
}
tms.put(key);
}
}
/**
* @param wm
* @param cheeseHandles
* @param index
*/
private InternalFactHandle updateHandle(final StatefulSession wm, final FactHandle handle) {
for (Iterator it = wm.iterateFactHandles(); it.hasNext(); ) {
InternalFactHandle newHandle = (InternalFactHandle) it.next();
if (((InternalFactHandle) handle).getId() == newHandle.getId()) {
return newHandle;
}
}
return null;
}
private static void writeFactHandle(
MarshallerWriteContext context,
ObjectOutputStream stream,
ObjectMarshallingStrategyStore objectMarshallingStrategyStore,
int type,
InternalFactHandle handle)
throws IOException {
stream.writeInt(type);
stream.writeInt(handle.getId());
stream.writeLong(handle.getRecency());
if (type == 2) {
// is event
EventFactHandle efh = (EventFactHandle) handle;
stream.writeLong(efh.getStartTimestamp());
stream.writeLong(efh.getDuration());
stream.writeBoolean(efh.isExpired());
stream.writeLong(efh.getActivationsCount());
}
// context.out.println( "Object : int:" + handle.getId() + " long:" + handle.getRecency() );
// context.out.println( handle.getObject() );
Object object = handle.getObject();
// Old versions wrote -1 and tested >= 0 to see if there was a strategy available
// Now, we write -2 to indicate that we write the strategy class name to the stream
stream.writeInt(-2);
if (object != null) {
ObjectMarshallingStrategy strategy = objectMarshallingStrategyStore.getStrategyObject(object);
String strategyClassName = strategy.getClass().getName();
stream.writeUTF(strategyClassName);
strategy.write(stream, object);
} else {
stream.writeUTF("");
}
if (handle.getEntryPoint() instanceof InternalWorkingMemoryEntryPoint) {
String entryPoint =
((InternalWorkingMemoryEntryPoint) handle.getEntryPoint())
.getEntryPoint()
.getEntryPointId();
if (entryPoint != null && !entryPoint.equals("")) {
stream.writeBoolean(true);
stream.writeUTF(entryPoint);
} else {
stream.writeBoolean(false);
}
} else {
stream.writeBoolean(false);
}
}
public static ReteooStatefulSession readSession(
MarshallerReaderContext context,
int id,
ExecutorService executor,
Environment environment,
SessionConfiguration config)
throws IOException, ClassNotFoundException {
boolean multithread = context.readBoolean();
long time = context.readLong();
FactHandleFactory handleFactory =
context.ruleBase.newFactHandleFactory(context.readInt(), context.readLong());
long propagationCounter = context.readLong();
InternalFactHandle initialFactHandle =
new DefaultFactHandle(
context.readInt(), // id
InitialFactImpl.getInstance(),
context.readLong(),
null);
context.handles.put(initialFactHandle.getId(), initialFactHandle);
DefaultAgenda agenda =
context
.ruleBase
.getConfiguration()
.getComponentFactory()
.getAgendaFactory()
.createAgenda(context.ruleBase, false);
readAgenda(context, agenda);
ReteooStatefulSession session =
new ReteooStatefulSession(
id,
context.ruleBase,
executor,
handleFactory,
initialFactHandle,
propagationCounter,
config,
agenda,
environment);
new StatefulKnowledgeSessionImpl(session);
initialFactHandle.setEntryPoint(
session.getEntryPoints().get(EntryPoint.DEFAULT.getEntryPointId()));
return readSession(session, agenda, time, multithread, context);
}
public void modifyLeftTuple(
LeftTuple leftTuple, PropagationContext context, InternalWorkingMemory workingMemory) {
final ObjectHashMap memory = (ObjectHashMap) workingMemory.getNodeMemory(this);
// add it to a memory mapping
InternalFactHandle handle = (InternalFactHandle) memory.get(leftTuple);
// propagate it
for (RightTuple rightTuple = handle.getFirstRightTuple();
rightTuple != null;
rightTuple = (RightTuple) rightTuple.getHandleNext()) {
rightTuple.getRightTupleSink().modifyRightTuple(rightTuple, context, workingMemory);
}
}
public void rowUpdated(
final Rule rule,
final LeftTuple resultLeftTuple,
final PropagationContext context,
final InternalWorkingMemory workingMemory) {
RightTuple rightTuple = (RightTuple) resultLeftTuple.getObject();
if (rightTuple.getMemory() != null) {
// Already sheduled as an insert
return;
}
rightTuple.setLeftTuple(null);
resultLeftTuple.setObject(null);
// We need to recopy everything back again, as we don't know what has or hasn't changed
QueryTerminalNode node = (QueryTerminalNode) resultLeftTuple.getLeftTupleSink();
Declaration[] decls = node.getDeclarations();
InternalFactHandle rootHandle = resultLeftTuple.get(0);
DroolsQuery query = (DroolsQuery) rootHandle.getObject();
Object[] objects = new Object[query.getElements().length];
Declaration decl;
for (int i = 0, length = this.variables.length; i < length; i++) {
decl = decls[this.variables[i]];
objects[this.variables[i]] =
decl.getValue(workingMemory, resultLeftTuple.get(decl).getObject());
}
QueryElementFactHandle handle = (QueryElementFactHandle) rightTuple.getFactHandle();
handle.setRecency(workingMemory.getFactHandleFactory().getAtomicRecency().incrementAndGet());
handle.setObject(objects);
if (query.isOpen()) {
rightTuple.setLeftTuple(resultLeftTuple);
resultLeftTuple.setObject(rightTuple);
}
// Don't need to recreate child links, as they will already be there form the first "add"
RightTupleList rightTuples = query.getResultUpdateRightTupleList();
if (rightTuples == null) {
rightTuples = new RightTupleList();
query.setResultUpdateRightTupleList(rightTuples);
QueryResultUpdateAction updateAction =
new QueryResultUpdateAction(context, this.factHandle, leftTuple, this.node);
context.getQueue2().addFirst(updateAction);
}
rightTuples.add(rightTuple);
}
public static void writeFactHandles(MarshallerWriteContext context, ObjectStore objectStore)
throws IOException {
ObjectOutputStream stream = context.stream;
InternalWorkingMemory wm = context.wm;
ObjectMarshallingStrategyStore objectMarshallingStrategyStore =
context.objectMarshallingStrategyStore;
List<InternalFactHandle> matchFactHandles = null;
if (((InternalAgenda) wm.getAgenda()).isDeclarativeAgenda()) {
ActivationIterator it = ActivationIterator.iterator(wm);
matchFactHandles = new ArrayList<InternalFactHandle>(100);
for (Activation item = (Activation) it.next(); item != null; item = (Activation) it.next()) {
matchFactHandles.add(item.getFactHandle());
}
}
stream.writeInt(
objectStore.size() + ((matchFactHandles == null) ? 0 : matchFactHandles.size()));
// Write out FactHandles
for (InternalFactHandle handle : orderFacts(objectStore)) {
// stream.writeShort( PersisterEnums.FACT_HANDLE );
// InternalFactHandle handle = (InternalFactHandle) it.next();
writeFactHandle(context, stream, objectMarshallingStrategyStore, handle);
writeRightTuples(handle, context);
}
if (matchFactHandles != null) {
for (InternalFactHandle handle : orderFacts(matchFactHandles)) {
Object object = handle.getObject();
handle.setObject(
null); // we must set it to null as we don't want to write out the Activation
writeFactHandle(context, stream, objectMarshallingStrategyStore, handle);
handle.setObject(object); // restore object
writeRightTuples(handle, context);
}
}
// writeLeftTuples( context );
writeLeftTuples(context, orderFacts(objectStore));
if (matchFactHandles != null) {
stream.writeBoolean(true);
writeLeftTuples(context, orderFacts(matchFactHandles));
} else {
stream.writeBoolean(false);
}
}
/**
* Propagate the <code>FactHandleimpl</code> through the <code>Rete</code> network. All <code>
* FactHandleImpl</code> should be remembered in the node memory, so that later runtime rule
* attachmnents can have the matched facts propagated to them.
*
* @param factHandle The fact handle.
* @param object The object to assert.
* @param workingMemory The working memory session.
*/
public void assertObject(
final InternalFactHandle factHandle,
final PropagationContext context,
final InternalWorkingMemory workingMemory) {
if (objectMemoryEnabled && !(queryNode && !((DroolsQuery) factHandle.getObject()).isOpen())) {
final ObjectHashSet memory = (ObjectHashSet) workingMemory.getNodeMemory(this);
memory.add(factHandle, false);
}
if (compiledNetwork != null) {
compiledNetwork.assertObject(factHandle, context, workingMemory);
} else {
context.setCurrentPropagatingOTN(this);
this.sink.propagateAssertObject(factHandle, context, workingMemory);
}
if (this.objectType.isEvent()
&& this.expirationOffset >= 0
&& this.expirationOffset != Long.MAX_VALUE) {
// schedule expiration
WorkingMemoryReteExpireAction expire = new WorkingMemoryReteExpireAction(factHandle, this);
TimerService clock = workingMemory.getTimerService();
long nextTimestamp =
Math.max(
clock.getCurrentTime() + this.expirationOffset,
((EventFactHandle) factHandle).getStartTimestamp() + this.expirationOffset);
JobContext jobctx = new ExpireJobContext(expire, workingMemory);
JobHandle handle =
clock.scheduleJob(job, jobctx, new PointInTimeTrigger(nextTimestamp, null, null));
jobctx.setJobHandle(handle);
}
}
public static void readRightTuple(MarshallerReaderContext context, InternalFactHandle factHandle)
throws IOException {
ObjectInputStream stream = context.stream;
int sinkId = stream.readInt();
RightTupleSink sink = (sinkId >= 0) ? (RightTupleSink) context.sinks.get(sinkId) : null;
RightTuple rightTuple = new RightTuple(factHandle, sink);
context.rightTuples.put(new RightTupleKey(factHandle.getId(), sink), rightTuple);
if (sink != null) {
BetaMemory memory = null;
switch (sink.getType()) {
case NodeTypeEnums.AccumulateNode:
{
memory = ((AccumulateMemory) context.wm.getNodeMemory((BetaNode) sink)).betaMemory;
break;
}
default:
{
memory = (BetaMemory) context.wm.getNodeMemory((BetaNode) sink);
break;
}
}
memory.getRightTupleMemory().add(rightTuple);
memory.linkLeft();
}
}
public LeftTuple(
final LeftTuple leftTuple,
final RightTuple rightTuple,
LeftTupleSink sink,
boolean leftTupleMemoryEnabled) {
this.handle = rightTuple.getFactHandle();
this.index = leftTuple.index + 1;
this.parent = leftTuple;
this.recency = leftTuple.recency + this.handle.getRecency();
this.hashCode = leftTuple.hashCode ^ (handle.hashCode() * 31);
if (leftTupleMemoryEnabled) {
this.rightParent = rightTuple;
this.rightParentNext = this.rightParent.getBetaChildren();
if (this.rightParentNext != null) {
this.rightParentNext.rightParentPrevious = this;
}
this.rightParent.setBetaChildren(this);
this.leftParent = leftTuple;
this.leftParentNext = leftTuple.children;
if (this.leftParentNext != null) {
this.leftParentNext.leftParentPrevious = this;
}
this.leftParent.children = this;
}
this.sink = sink;
}
private static ProtobufMessages.NodeMemory writeQueryElementNodeMemory(
final int nodeId, final Memory memory, final InternalWorkingMemory wm) {
LeftTupleIterator it = LeftTupleIterator.iterator(wm, ((QueryElementNodeMemory) memory).node);
ProtobufMessages.NodeMemory.QueryElementNodeMemory.Builder _query =
ProtobufMessages.NodeMemory.QueryElementNodeMemory.newBuilder();
for (LeftTuple leftTuple = (LeftTuple) it.next();
leftTuple != null;
leftTuple = (LeftTuple) it.next()) {
InternalFactHandle handle = (InternalFactHandle) leftTuple.getObject();
FactHandle _handle =
ProtobufMessages.FactHandle.newBuilder()
.setId(handle.getId())
.setRecency(handle.getRecency())
.build();
ProtobufMessages.NodeMemory.QueryElementNodeMemory.QueryContext.Builder _context =
ProtobufMessages.NodeMemory.QueryElementNodeMemory.QueryContext.newBuilder()
.setTuple(PersisterHelper.createTuple(leftTuple))
.setHandle(_handle);
LeftTuple childLeftTuple = leftTuple.getFirstChild();
while (childLeftTuple != null) {
RightTuple rightParent = childLeftTuple.getRightParent();
_context.addResult(
ProtobufMessages.FactHandle.newBuilder()
.setId(rightParent.getFactHandle().getId())
.setRecency(rightParent.getFactHandle().getRecency())
.build());
while (childLeftTuple != null && childLeftTuple.getRightParent() == rightParent) {
// skip to the next child that has a different right parent
childLeftTuple = childLeftTuple.getLeftParentNext();
}
}
_query.addContext(_context.build());
}
return _query.getContextCount() > 0
? ProtobufMessages.NodeMemory.newBuilder()
.setNodeId(nodeId)
.setNodeType(ProtobufMessages.NodeMemory.NodeType.QUERY_ELEMENT)
.setQueryElement(_query.build())
.build()
: null;
}
public static void writeInitialFactHandleLeftTuples(MarshallerWriteContext context)
throws IOException {
ObjectOutputStream stream = context.stream;
// context.out.println( "InitialFact LeftTuples Start" );
InternalFactHandle handle = context.wm.getInitialFactHandle();
for (LeftTuple leftTuple = handle.getFirstLeftTuple();
leftTuple != null;
leftTuple = (LeftTuple) leftTuple.getLeftParentNext()) {
stream.writeShort(PersisterEnums.LEFT_TUPLE);
stream.writeInt(leftTuple.getLeftTupleSink().getId());
// context.out.println( "LeftTuple sinkId:" + leftTuple.getLeftTupleSink().getId() );
writeLeftTuple(leftTuple, context, true);
}
stream.writeShort(PersisterEnums.END);
// context.out.println( "InitialFact LeftTuples End" );
}
// ------------------------------------------------------------
// Constructors
// ------------------------------------------------------------
public LeftTuple(
final InternalFactHandle factHandle, LeftTupleSink sink, boolean leftTupleMemoryEnabled) {
this.handle = factHandle;
this.recency = factHandle.getRecency();
this.hashCode = handle.hashCode();
if (leftTupleMemoryEnabled) {
LeftTuple currentFirst = handle.getLeftTuple();
if (currentFirst != null) {
currentFirst.leftParentPrevious = this;
this.leftParentNext = currentFirst;
}
handle.setLeftTuple(this);
}
this.sink = sink;
}
public boolean evaluateCachedLeft(
InternalWorkingMemory workingMemory,
VariableContextEntry context,
InternalFactHandle right) {
Object target = ((VariableRestriction.ObjectVariableContextEntry) context).left;
Object source = right.getObject();
return compare(source, target, workingMemory);
}
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);
}
}
private static ProtobufMessages.FactHandle.HandleType getHandleType(InternalFactHandle handle) {
if (handle instanceof EventFactHandle) {
return ProtobufMessages.FactHandle.HandleType.EVENT;
} else if (handle instanceof QueryElementFactHandle) {
return ProtobufMessages.FactHandle.HandleType.QUERY;
} else if (handle.getObject() instanceof InitialFact) {
return ProtobufMessages.FactHandle.HandleType.INITIAL_FACT;
}
return ProtobufMessages.FactHandle.HandleType.FACT;
}
public boolean evaluateCachedRight(
InternalWorkingMemory workingMemory,
VariableContextEntry context,
InternalFactHandle left) {
Object target = left.getObject();
Object source = context.getObject();
return compare(source, target, workingMemory);
}
private void reaccumulateForLeftTuple(
final LeftTuple leftTuple,
final InternalWorkingMemory workingMemory,
final AccumulateMemory memory,
final AccumulateContext accctx) {
this.accumulate.init(memory.workingMemoryContext, accctx.context, leftTuple, workingMemory);
for (LeftTuple childMatch = getFirstMatch(leftTuple, accctx, false);
childMatch != null;
childMatch = childMatch.getLeftParentNext()) {
InternalFactHandle childHandle = childMatch.getRightParent().getFactHandle();
LeftTuple tuple = leftTuple;
if (this.unwrapRightObject) {
tuple = (LeftTuple) childHandle.getObject();
childHandle = tuple.getLastHandle();
}
this.accumulate.accumulate(
memory.workingMemoryContext, accctx.context, tuple, childHandle, workingMemory);
}
}
public void accumulate(
Object workingMemoryContext,
Object context,
Tuple leftTuple,
InternalFactHandle handle,
Declaration[] declarations,
Declaration[] innerDeclarations,
WorkingMemory workingMemory)
throws Exception {
this.matchingObjects.add(handle.getObject());
}
public boolean evaluate(
InternalWorkingMemory workingMemory,
final InternalReadAccessor extractor1,
final InternalFactHandle handle1,
final InternalReadAccessor extractor2,
final InternalFactHandle handle2) {
if (extractor1.isNullValue(workingMemory, handle1.getObject())
|| extractor2.isNullValue(workingMemory, handle2.getObject())) {
return false;
}
long distStart =
((EventFactHandle) handle1).getStartTimestamp()
- ((EventFactHandle) handle2).getStartTimestamp();
long distEnd =
Math.abs(
((EventFactHandle) handle2).getEndTimestamp()
- ((EventFactHandle) handle1).getEndTimestamp());
return this.getOperator().isNegated() ^ (distStart > 0 && distEnd <= this.endDev);
}
/**
*
*
* <pre>
*
*
* type == "cheddar" && price > 10
*
*
* </pre>
*
* Test the use of the composite AND constraint. Composite AND constraints are only used when
* nested inside other field constraints, as the top level AND is implicit
*
* @throws IntrospectionException
*/
public void testCompositeAndConstraint() {
final ReteooRuleBase ruleBase = (ReteooRuleBase) RuleBaseFactory.newRuleBase();
final InternalWorkingMemory workingMemory =
(InternalWorkingMemory) ruleBase.newStatefulSession();
final ClassFieldExtractor extractor =
cache.getExtractor(Cheese.class, "type", getClass().getClassLoader());
final FieldValue field = FieldFactory.getFieldValue("cheddar");
final Evaluator evaluator = ValueType.STRING_TYPE.getEvaluator(Operator.EQUAL);
final LiteralConstraint constraint1 = new LiteralConstraint(extractor, evaluator, field);
final ClassFieldExtractor priceExtractor =
cache.getExtractor(Cheese.class, "price", getClass().getClassLoader());
final FieldValue priceField = FieldFactory.getFieldValue(10);
final Evaluator priceEvaluator = ValueType.INTEGER_TYPE.getEvaluator(Operator.GREATER);
final LiteralConstraint constraint2 =
new LiteralConstraint(priceExtractor, priceEvaluator, priceField);
final Cheese cheddar = new Cheese("cheddar", 15);
final AndConstraint constraint = new AndConstraint();
constraint.addAlphaConstraint(constraint1);
constraint.addAlphaConstraint(constraint2);
final ContextEntry context = constraint.createContextEntry();
final InternalFactHandle cheddarHandle = (InternalFactHandle) workingMemory.insert(cheddar);
// check constraint
assertTrue(constraint.isAllowed(cheddarHandle.getObject(), workingMemory, context));
cheddar.setPrice(5);
((ShadowProxy) cheddarHandle.getObject()).updateProxy();
assertFalse(constraint.isAllowed(cheddarHandle.getObject(), workingMemory, context));
cheddar.setType("stilton");
((ShadowProxy) cheddarHandle.getObject()).updateProxy();
assertFalse(constraint.isAllowed(cheddarHandle.getObject(), workingMemory, context));
cheddar.setPrice(15);
((ShadowProxy) cheddarHandle.getObject()).updateProxy();
assertFalse(constraint.isAllowed(cheddarHandle.getObject(), workingMemory, context));
}
