ExistsNode (Drools 4.0.0.11754MR2 API) - JBoss RULES 4.0.0.11754MR2 API 英文版文档

Field Summary
protected  BetaConstraints	constraints
protected  TupleSource	leftInput           The left input TupleSource.
protected  ObjectSource	rightInput           The right input TupleSource.

 

Fields inherited from class org.drools.reteoo.TupleSource
sink

 

Fields inherited from class org.drools.common.BaseNode
hasMemory, id, sharedCount

 

Constructor Summary
ExistsNode(int id, TupleSource leftInput, ObjectSource rightInput)           Constructs a new Exists node with EmptyBetaConstraints.
ExistsNode(int id, TupleSource leftInput, ObjectSource rightInput, BetaConstraints joinNodeBinder)           Construct.

 

Method Summary
void	assertObject(InternalFactHandle handle, PropagationContext context, InternalWorkingMemory workingMemory)           Assert a new FactHandleImpl from the right input.
void	assertTuple(ReteTuple leftTuple, PropagationContext context, InternalWorkingMemory workingMemory)           Assert a new ReteTuple from the left input.
void	attach()           Attaches the node into the network.
void	attach(InternalWorkingMemory[] workingMemories)
Object	createMemory(RuleBaseConfiguration config)           Creates a BetaMemory for the BetaNode's memory.
void	dumpMemory(InternalWorkingMemory workingMemory)
boolean	equals(Object object)
BetaNodeFieldConstraint[]	getConstraints()
ObjectSinkNode	getNextObjectSinkNode()           Returns the next node
TupleSinkNode	getNextTupleSinkNode()           Returns the next node
ObjectTypeNode	getObjectTypeNode()
ObjectSinkNode	getPreviousObjectSinkNode()           Returns the previous node
TupleSinkNode	getPreviousTupleSinkNode()           Returns the previous node
List	getRules()
int	hashCode()           The hashCode return is simply the unique id of the node.
void	remove(BaseNode node, InternalWorkingMemory[] workingMemories)           Removes the node from teh network.
void	retractObject(InternalFactHandle handle, PropagationContext context, InternalWorkingMemory workingMemory)           Retract the FactHandleImpl.
void	retractTuple(ReteTuple leftTuple, PropagationContext context, InternalWorkingMemory workingMemory)           Retract the ReteTuple, any resulting propagated joins are also retracted.
void	setNextObjectSinkNode(ObjectSinkNode next)           Sets the next node
void	setNextTupleSinkNode(TupleSinkNode next)           Sets the next node
void	setPreviousObjectSinkNode(ObjectSinkNode previous)           Sets the previous node
void	setPreviousTupleSinkNode(TupleSinkNode previous)           Sets the previous node
String	toString()
void	updateSink(TupleSink sink, PropagationContext context, InternalWorkingMemory workingMemory)           Updates the given sink propagating all previously propagated tuples to it

 

Methods inherited from class org.drools.reteoo.TupleSource
addTupleSink, getSinkPropagator, removeTupleSink

 

Methods inherited from class org.drools.common.BaseNode
addShare, getId, getSharedCount, hasMemory, isInUse, isShared, removeShare, setHasMemory

 

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

 

Methods inherited from interface org.drools.common.NodeMemory
getId

 

Field Detail

leftInput

protected final TupleSource leftInput

The left input TupleSource.

rightInput

protected final ObjectSource rightInput

The right input TupleSource.

constraints

protected final BetaConstraints constraints

ExistsNode

public ExistsNode(int id,
                  TupleSource leftInput,
                  ObjectSource rightInput)

Constructs a new Exists node with EmptyBetaConstraints.

Parameters:

leftInput - The left input TupleSource.

rightInput - The right input ObjectSource.

ExistsNode

public ExistsNode(int id,
                  TupleSource leftInput,
                  ObjectSource rightInput,
                  BetaConstraints joinNodeBinder)

Construct.

Parameters:

leftInput - The left input TupleSource.

rightInput - The right input ObjectSource.

joinNodeBinder - The constraints to be aplied to the right objects

assertTuple

public void assertTuple(ReteTuple leftTuple,
                        PropagationContext context,
                        InternalWorkingMemory workingMemory)

Assert a new ReteTuple from the left input. It iterates over the right FactHandleImpl's and if any match is found, a copy of the ReteTuple is made and propagated.

Parameters:

tuple - The Tuple being asserted.

context - The PropagationContext

workingMemory - The working memory seesion.

assertObject

public void assertObject(InternalFactHandle handle,
                         PropagationContext context,
                         InternalWorkingMemory workingMemory)

Assert a new FactHandleImpl from the right input. If it matches any left ReteTuple's that had no matches before, propagate tuple as an assertion.

Parameters:

handle - The FactHandleImpl being asserted.

context - The PropagationContext

workingMemory - The working memory seesion.

retractObject

public void retractObject(InternalFactHandle handle,
                          PropagationContext context,
                          InternalWorkingMemory workingMemory)

Retract the FactHandleImpl. If the handle has any ReteTuple matches and those tuples now have no other match, retract tuple

Parameters:

handle - the being retracted

context - The PropagationContext

workingMemory - The working memory seesion.

retractTuple

public void retractTuple(ReteTuple leftTuple,
                         PropagationContext context,
                         InternalWorkingMemory workingMemory)

Retract the ReteTuple, any resulting propagated joins are also retracted.

Parameters:

leftTuple - The tuple being retracted

context - The PropagationContext

workingMemory - The working memory seesion.

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

public String toString()

public BetaNodeFieldConstraint[] getConstraints()

public void attach()

public List getRules()

public ObjectTypeNode getObjectTypeNode()

public void attach(InternalWorkingMemory[] workingMemories)

public void remove(BaseNode node,
                   InternalWorkingMemory[] workingMemories)

public void dumpMemory(InternalWorkingMemory workingMemory)

public int hashCode()

public boolean equals(Object object)

public Object createMemory(RuleBaseConfiguration config)

public TupleSinkNode getNextTupleSinkNode()

public void setNextTupleSinkNode(TupleSinkNode next)

public TupleSinkNode getPreviousTupleSinkNode()

public void setPreviousTupleSinkNode(TupleSinkNode previous)

public ObjectSinkNode getNextObjectSinkNode()

public void setNextObjectSinkNode(ObjectSinkNode next)

public ObjectSinkNode getPreviousObjectSinkNode()

public void setPreviousObjectSinkNode(ObjectSinkNode previous)