Package org.drools.core.reteoo

Class AlphaNode

java.lang.Object

org.drools.core.common.BaseNode

org.drools.core.reteoo.ObjectSource

org.drools.core.reteoo.AlphaNode

All Implemented Interfaces:

NetworkNode, ObjectSink, ObjectSinkNode, Sink

public class AlphaNode
extends ObjectSource
implements ObjectSinkNode

AlphaNodes are nodes in the Rete network used to apply FieldConstraint<.code>s on asserted fact objects where the FieldConstraints have no dependencies on any other of the facts in the current Rule.

See Also:

AlphaNodeFieldConstraint

Field Summary

Fields

Modifier and Type	Field	Description
protected AlphaNodeFieldConstraint	constraint	The FieldConstraint

Fields inherited from class org.drools.core.reteoo.ObjectSource

alphaNodeHashingThreshold, alphaNodeRangeIndexThreshold, declaredMask, inferredMask, sink, source

Fields inherited from class org.drools.core.common.BaseNode

associations, hashcode, id, memoryId, partitionId, partitionsEnabled

Constructor Summary

Constructors

Constructor	Description
AlphaNode()
AlphaNode(int id, AlphaNodeFieldConstraint constraint, ObjectSource objectSource, BuildContext context)	Construct an AlphaNode with a unique id using the provided FieldConstraint and the given ObjectSource.

Method Summary

Modifier and Type	Method	Description
void	assertObject(InternalFactHandle factHandle, PropagationContext context, ReteEvaluator reteEvaluator)
void	byPassModifyToBetaNode(InternalFactHandle factHandle, ModifyPreviousTuples modifyPreviousTuples, PropagationContext context, ReteEvaluator reteEvaluator)
BitMask	calculateDeclaredMask(ObjectType objectType, java.util.List<java.lang.String> settableProperties)
void	doAttach(BuildContext context)
boolean	equals(java.lang.Object object)
AlphaNodeFieldConstraint	getConstraint()	Retruns the FieldConstraint
BitMask	getDeclaredMask()
BitMask	getInferredMask()
ObjectSinkNode	getNextObjectSinkNode()	Returns the next node
ObjectSinkNode	getPreviousObjectSinkNode()	Returns the previous node
short	getType()
void	modifyObject(InternalFactHandle factHandle, ModifyPreviousTuples modifyPreviousTuples, PropagationContext context, ReteEvaluator reteEvaluator)
void	setNextObjectSinkNode(ObjectSinkNode next)	Sets the next node
void	setPartitionId(BuildContext context, RuleBasePartitionId partitionId)	Sets the partition this node belongs to
void	setPreviousObjectSinkNode(ObjectSinkNode previous)	Sets the previous node
java.lang.String	toString()
void	updateSink(ObjectSink sink, PropagationContext context, InternalWorkingMemory workingMemory)

Methods inherited from class org.drools.core.reteoo.ObjectSource

addObjectSink, doRemove, getObjectSinkPropagator, getObjectTypeNode, getParentObjectSource, getRuleBase, initDeclaredMask, isInUse, networkUpdated, removeObjectSink, resetInferredMask, setObjectSinkPropagator, setParentObjectSource, setPartitionIdWithSinks, setSourcePartitionId, updateMask

Methods inherited from class org.drools.core.common.BaseNode

addAssociatedTerminal, addAssociation, addAssociation, attach, getAssociatedRules, getAssociatedTerminalsSize, getAssociationsSize, getId, getMemoryId, getPartitionId, getSinks, hasAssociatedTerminal, hashCode, initMemoryId, isAssociatedWith, isStreamMode, remove, removeAssociatedTerminal, removeAssociation, setId, setPartitionsEnabled, setStreamMode

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.drools.core.common.NetworkNode

addAssociatedTerminal, getAssociatedRules, getAssociatedTerminalsSize, getId, getPartitionId, getSinks, hasAssociatedTerminal, isAssociatedWith, removeAssociatedTerminal

Methods inherited from interface org.drools.core.reteoo.ObjectSinkNode

setPartitionIdWithSinks

Field Detail

constraint

protected AlphaNodeFieldConstraint constraint

The FieldConstraint

Constructor Detail

AlphaNode

public AlphaNode()

AlphaNode

public AlphaNode(int id,
                 AlphaNodeFieldConstraint constraint,
                 ObjectSource objectSource,
                 BuildContext context)

Construct an AlphaNode with a unique id using the provided FieldConstraint and the given ObjectSource. Set the boolean flag to true if the node is supposed to have local memory, or false otherwise. Memory is optional for AlphaNodes and is only of benefic when adding additional Rules at runtime.

Parameters:

id - Node's ID

constraint - Node's constraints

objectSource - Node's object source

Method Detail

getConstraint

public AlphaNodeFieldConstraint getConstraint()

Retruns the FieldConstraint

Returns:

FieldConstraint

getType

public short getType()

Specified by:

getType in interface NetworkNode

doAttach

public void doAttach(BuildContext context)

Overrides:

doAttach in class BaseNode

setPartitionId

public void setPartitionId(BuildContext context,
                           RuleBasePartitionId partitionId)

Description copied from class: BaseNode

Sets the partition this node belongs to

Overrides:

setPartitionId in class ObjectSource

assertObject

public void assertObject(InternalFactHandle factHandle,
                         PropagationContext context,
                         ReteEvaluator reteEvaluator)

Specified by:

assertObject in interface ObjectSink

modifyObject

public void modifyObject(InternalFactHandle factHandle,
                         ModifyPreviousTuples modifyPreviousTuples,
                         PropagationContext context,
                         ReteEvaluator reteEvaluator)

Specified by:

modifyObject in interface ObjectSink

byPassModifyToBetaNode

public void byPassModifyToBetaNode(InternalFactHandle factHandle,
                                   ModifyPreviousTuples modifyPreviousTuples,
                                   PropagationContext context,
                                   ReteEvaluator reteEvaluator)

Specified by:

byPassModifyToBetaNode in interface ObjectSink

updateSink

public void updateSink(ObjectSink sink,
                       PropagationContext context,
                       InternalWorkingMemory workingMemory)

Specified by:

updateSink in class ObjectSource

toString

public java.lang.String toString()

Overrides:

toString in class BaseNode

equals

public boolean equals(java.lang.Object object)

Overrides:

equals in class java.lang.Object

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

calculateDeclaredMask

public BitMask calculateDeclaredMask(ObjectType objectType,
                                     java.util.List<java.lang.String> settableProperties)

Specified by:

calculateDeclaredMask in class ObjectSource

getDeclaredMask

public BitMask getDeclaredMask()

Overrides:

getDeclaredMask in class ObjectSource

getInferredMask

public BitMask getInferredMask()