org.drools.reteoo
Class BetaNode

java.lang.Object
  org.drools.common.BaseNode
      org.drools.reteoo.LeftTupleSource
          org.drools.reteoo.BetaNode

All Implemented Interfaces:

Externalizable, Serializable, NetworkNode, NodeMemory, LeftTupleSink, LeftTupleSinkNode, ObjectSink, ObjectSinkNode, RightTupleSink, Sink

Direct Known Subclasses:

AccumulateNode, ElseNode, ExistsNode, JoinNode, NotNode

public abstract class BetaNode
extends LeftTupleSource
implements LeftTupleSinkNode, ObjectSinkNode, RightTupleSink, NodeMemory

BetaNode provides the base abstract class for JoinNode and NotNode. It implements both TupleSink and ObjectSink and as such can receive Tuples and FactHandles. BetaNode uses BetaMemory to store the propagated instances.

See Also:

LeftTupleSource, LeftTupleSink, BetaMemory, Serialized Form

Field Summary

protected BehaviorManager	behavior
protected boolean	concurrentRightTupleMemory
protected BetaConstraints	constraints
protected LeftTupleSource	leftInput The left input TupleSource.
protected boolean	lrUnlinkingEnabled
protected boolean	objectMemory
protected ObjectSource	rightInput The right input TupleSource.
protected boolean	tupleMemoryEnabled

Fields inherited from class org.drools.reteoo.LeftTupleSource

sink

Fields inherited from class org.drools.common.BaseNode

associations, id, partitionId, partitionsEnabled

Constructor Summary

BetaNode()

Method Summary

void	attach() Attaches the node into the network.
void	attach(InternalWorkingMemory[] workingMemories)
Object	createMemory(RuleBaseConfiguration config) Creates a BetaMemory for the BetaNode's memory.
RightTuple	createRightTuple(InternalFactHandle handle, RightTupleSink sink)
protected void	doRemove(RuleRemovalContext context, ReteooBuilder builder, BaseNode node, InternalWorkingMemory[] workingMemories) Removes the node from teh network.
void	dumpMemory(InternalWorkingMemory workingMemory)
boolean	equals(Object object)
Behavior[]	getBehaviors()
BetaNodeFieldConstraint[]	getConstraints()
static LeftTuple	getFirstLeftTuple(LeftTupleMemory memory, FastIterator it)
LeftTuple	getFirstLeftTuple(RightTuple rightTuple, LeftTupleMemory memory, PropagationContext context, FastIterator it)
RightTuple	getFirstRightTuple(LeftTuple leftTuple, RightTupleMemory memory, PropagationContext context, FastIterator it)
static RightTuple	getFirstRightTuple(RightTupleMemory memory, FastIterator it)
FastIterator	getLeftIterator(LeftTupleMemory memory)
LeftTupleSource	getLeftTupleSource()
LeftTupleSinkNode	getNextLeftTupleSinkNode() Returns the next node
ObjectSinkNode	getNextObjectSinkNode() Returns the next node
ObjectTypeNode	getObjectTypeNode()
LeftTupleSinkNode	getPreviousLeftTupleSinkNode() Returns the previous node
ObjectSinkNode	getPreviousObjectSinkNode() Returns the previous node
BetaConstraints	getRawConstraints()
FastIterator	getRightIterator(RightTupleMemory memory)
List<String>	getRules()
int	hashCode() The hashCode return is simply the unique id of the node.
boolean	isConcurrentRightTupleMemory()
boolean	isLeftTupleMemoryEnabled()
boolean	isObjectMemoryEnabled()
protected boolean	leftUnlinked(PropagationContext context, InternalWorkingMemory workingMemory, BetaMemory memory)
void	modifyLeftTuple(InternalFactHandle factHandle, ModifyPreviousTuples modifyPreviousTuples, PropagationContext context, InternalWorkingMemory workingMemory)
void	modifyObject(InternalFactHandle factHandle, ModifyPreviousTuples modifyPreviousTuples, PropagationContext context, InternalWorkingMemory workingMemory)
void	networkUpdated() A method that is called for all nodes whose network below them changed, after the change is complete, providing them with an oportunity for state update
void	readExternal(ObjectInput in)
protected boolean	rightUnlinked(PropagationContext context, InternalWorkingMemory workingMemory, BetaMemory memory)
void	setConcurrentRightTupleMemory(boolean concurrentRightTupleMemory)
void	setLeftTupleMemoryEnabled(boolean tupleMemoryEnabled)
void	setNextLeftTupleSinkNode(LeftTupleSinkNode next) Sets the next node
void	setNextObjectSinkNode(ObjectSinkNode next) Sets the next node
void	setObjectMemoryEnabled(boolean objectMemory)
void	setPreviousLeftTupleSinkNode(LeftTupleSinkNode previous) Sets the previous node
void	setPreviousObjectSinkNode(ObjectSinkNode previous) Sets the previous node
void	setUnificationJoin()
String	toString()
void	writeExternal(ObjectOutput out)

Methods inherited from class org.drools.reteoo.LeftTupleSource

addTupleSink, getSinkPropagator, isInUse, removeTupleSink, updateSink

Methods inherited from class org.drools.common.BaseNode

addAssociation, getAssociations, getId, getPartitionId, remove, removeAssociation, setPartitionId

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.drools.reteoo.LeftTupleSink

assertLeftTuple, createLeftTuple, createLeftTuple, createLeftTuple, createLeftTuple, getType, modifyLeftTuple, retractLeftTuple

Methods inherited from interface org.drools.reteoo.ObjectSink

assertObject

Methods inherited from interface org.drools.common.NetworkNode

getId, getPartitionId

Methods inherited from interface org.drools.reteoo.RightTupleSink

getType, modifyRightTuple, retractRightTuple

Methods inherited from interface org.drools.common.NodeMemory

getId

Field Detail

leftInput

protected LeftTupleSource leftInput

The left input TupleSource.

rightInput

protected ObjectSource rightInput

The right input TupleSource.

constraints

protected BetaConstraints constraints

behavior

protected BehaviorManager behavior

objectMemory

protected boolean objectMemory

tupleMemoryEnabled

protected boolean tupleMemoryEnabled

concurrentRightTupleMemory

protected boolean concurrentRightTupleMemory

lrUnlinkingEnabled

protected boolean lrUnlinkingEnabled

See Also:

LRUnlinkingOption

Constructor Detail

BetaNode

public BetaNode()

Method Detail

readExternal

public void readExternal(ObjectInput in)
                  throws IOException,
                         ClassNotFoundException

Specified by:

readExternal in interface Externalizable

Overrides:

readExternal in class LeftTupleSource

Throws:

IOException

ClassNotFoundException

writeExternal

public void writeExternal(ObjectOutput out)
                   throws IOException

Specified by:

writeExternal in interface Externalizable

Overrides:

writeExternal in class LeftTupleSource

Throws:

IOException

setUnificationJoin

public void setUnificationJoin()

getRightIterator

public FastIterator getRightIterator(RightTupleMemory memory)

getLeftIterator

public FastIterator getLeftIterator(LeftTupleMemory memory)

getFirstRightTuple

public RightTuple getFirstRightTuple(LeftTuple leftTuple,
                                     RightTupleMemory memory,
                                     PropagationContext context,
                                     FastIterator it)

getFirstLeftTuple

public LeftTuple getFirstLeftTuple(RightTuple rightTuple,
                                   LeftTupleMemory memory,
                                   PropagationContext context,
                                   FastIterator it)

getFirstRightTuple

public static RightTuple getFirstRightTuple(RightTupleMemory memory,
                                            FastIterator it)

getFirstLeftTuple

public static LeftTuple getFirstLeftTuple(LeftTupleMemory memory,
                                          FastIterator it)

getConstraints

public BetaNodeFieldConstraint[] getConstraints()

getRawConstraints

public BetaConstraints getRawConstraints()

getBehaviors

public Behavior[] getBehaviors()

attach

public void attach()

Description copied from class: BaseNode

Attaches the node into the network. Usually to the parent ObjectSource or TupleSource

Specified by:

attach in class BaseNode

networkUpdated

public void networkUpdated()

Description copied from class: BaseNode

A method that is called for all nodes whose network below them changed, after the change is complete, providing them with an oportunity for state update

Specified by:

networkUpdated in class BaseNode

getRules

public List<String> getRules()

getObjectTypeNode

public ObjectTypeNode getObjectTypeNode()

attach

public void attach(InternalWorkingMemory[] workingMemories)

Specified by:

attach in class BaseNode

doRemove

protected void doRemove(RuleRemovalContext context,
                        ReteooBuilder builder,
                        BaseNode node,
                        InternalWorkingMemory[] workingMemories)

Description copied from class: BaseNode

Removes the node from teh network. Usually from the parent ObjectSource or TupleSource

Specified by:

doRemove in class BaseNode

modifyObject

public void modifyObject(InternalFactHandle factHandle,
                         ModifyPreviousTuples modifyPreviousTuples,
                         PropagationContext context,
                         InternalWorkingMemory workingMemory)

Specified by:

modifyObject in interface ObjectSink

modifyLeftTuple

public void modifyLeftTuple(InternalFactHandle factHandle,
                            ModifyPreviousTuples modifyPreviousTuples,
                            PropagationContext context,
                            InternalWorkingMemory workingMemory)

Specified by:

modifyLeftTuple in interface LeftTupleSink

isObjectMemoryEnabled

public boolean isObjectMemoryEnabled()

setObjectMemoryEnabled

public void setObjectMemoryEnabled(boolean objectMemory)

isLeftTupleMemoryEnabled

public boolean isLeftTupleMemoryEnabled()

Specified by:

isLeftTupleMemoryEnabled in interface LeftTupleSink

setLeftTupleMemoryEnabled

public void setLeftTupleMemoryEnabled(boolean tupleMemoryEnabled)

Specified by:

setLeftTupleMemoryEnabled in interface LeftTupleSink

isConcurrentRightTupleMemory

public boolean isConcurrentRightTupleMemory()

setConcurrentRightTupleMemory

public void setConcurrentRightTupleMemory(boolean concurrentRightTupleMemory)

toString

public String toString()

Overrides:

toString in class BaseNode

dumpMemory

public void dumpMemory(InternalWorkingMemory workingMemory)

getLeftTupleSource

public LeftTupleSource getLeftTupleSource()

Specified by:

getLeftTupleSource in interface LeftTupleSink

hashCode

public int hashCode()

Description copied from class: BaseNode

The hashCode return is simply the unique id of the node. It is expected that base classes will also implement equals(Object object).

Overrides:

hashCode in class BaseNode

equals

public boolean equals(Object object)

Overrides:

equals in class Object

createMemory

public Object createMemory(RuleBaseConfiguration config)

Creates a BetaMemory for the BetaNode's memory.

Specified by:

createMemory in interface NodeMemory

getNextLeftTupleSinkNode

public LeftTupleSinkNode getNextLeftTupleSinkNode()

Returns the next node

Specified by:

getNextLeftTupleSinkNode in interface LeftTupleSinkNode

Returns:

The next TupleSinkNode

setNextLeftTupleSinkNode

public void setNextLeftTupleSinkNode(LeftTupleSinkNode next)

Sets the next node

Specified by:

setNextLeftTupleSinkNode in interface LeftTupleSinkNode

Parameters:

next - The next TupleSinkNode

getPreviousLeftTupleSinkNode

public LeftTupleSinkNode getPreviousLeftTupleSinkNode()

Returns the previous node

Specified by:

getPreviousLeftTupleSinkNode in interface LeftTupleSinkNode

Returns:

The previous TupleSinkNode

setPreviousLeftTupleSinkNode

public void setPreviousLeftTupleSinkNode(LeftTupleSinkNode previous)

Sets the previous node

Specified by:

setPreviousLeftTupleSinkNode in interface LeftTupleSinkNode

Parameters:

previous - The previous TupleSinkNode

getNextObjectSinkNode

public ObjectSinkNode getNextObjectSinkNode()

Returns the next node

Specified by:

getNextObjectSinkNode in interface ObjectSinkNode

Returns:

The next ObjectSinkNode

setNextObjectSinkNode

public void setNextObjectSinkNode(ObjectSinkNode next)

Sets the next node

Specified by:

setNextObjectSinkNode in interface ObjectSinkNode

Parameters:

next - The next ObjectSinkNode

getPreviousObjectSinkNode

public ObjectSinkNode getPreviousObjectSinkNode()

Returns the previous node

Specified by:

getPreviousObjectSinkNode in interface ObjectSinkNode

Returns:

The previous ObjectSinkNode

setPreviousObjectSinkNode

public void setPreviousObjectSinkNode(ObjectSinkNode previous)

Sets the previous node

Specified by:

setPreviousObjectSinkNode in interface ObjectSinkNode

Parameters:

previous - The previous ObjectSinkNode

createRightTuple

public RightTuple createRightTuple(InternalFactHandle handle,
                                   RightTupleSink sink)

leftUnlinked

protected boolean leftUnlinked(PropagationContext context,
                               InternalWorkingMemory workingMemory,
                               BetaMemory memory)

rightUnlinked

protected boolean rightUnlinked(PropagationContext context,
                                InternalWorkingMemory workingMemory,
                                BetaMemory memory)