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

org.drools.reteoo
Class Rete

java.lang.Object
  org.drools.common.BaseNode
      org.drools.reteoo.ObjectSource
          org.drools.reteoo.Rete

All Implemented Interfaces:

Serializable, NetworkNode, NodeMemory, ObjectSink

public class Rete
extends ObjectSource
implements Serializable, ObjectSink, NodeMemory

The Rete-OO network. The Rete class is the root Object. All objects are asserted into the Rete node where it propagates to all matching ObjectTypeNodes. The first time an instance of a Class type is asserted it does a full iteration of all ObjectTyppeNodes looking for matches, any matches are then cached in a HashMap which is used for future assertions. While Rete extends ObjectSource nad implements ObjectSink it nulls the methods attach(), remove() and updateNewNode() as this is the root node they are no applicable

Author:

Mark Proctor, Bob McWhirter

See Also:

ObjectTypeNode, Serialized Form

Field Summary

 

Fields inherited from class org.drools.reteoo.ObjectSource
objectSource, sink

 

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

 

Constructor Summary
Rete()

 

Method Summary
protected  void	addObjectSink(ObjectSink objectSink)           Adds the TupleSink so that it may receive Tuples propagated from this TupleSource.
void	assertObject(InternalFactHandle handle, PropagationContext context, InternalWorkingMemory workingMemory)           This is the entry point into the network for all asserted Facts.
void	attach()           Attaches the node into the network.
void	attach(InternalWorkingMemory[] workingMemories)
Object	createMemory(RuleBaseConfiguration config)
boolean	equals(Object object)
ObjectHashMap	getObjectTypeNodes()
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.
protected  void	removeObjectSink(ObjectSink objectSink)           Removes the ObjectSink
void	retractObject(InternalFactHandle handle, PropagationContext context, InternalWorkingMemory workingMemory)           Retract a fact object from this RuleBase and the specified WorkingMemory.
void	updateSink(ObjectSink sink, PropagationContext context, InternalWorkingMemory workingMemory)

 

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

 

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

 

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

 

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

 

Constructor Detail

Rete

public Rete()

assertObject

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

This is the entry point into the network for all asserted Facts. Iterates a cache of matching ObjectTypdeNodes asserting the Fact. If the cache does not exist it first iteraes and builds the cache.

Specified by:

assertObject in interface ObjectSink

Parameters:

handle - The FactHandle of the fact to assert

context - The PropagationContext of the WorkingMemory action

workingMemory - The working memory session.

retractObject

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

Retract a fact object from this RuleBase and the specified WorkingMemory.

Specified by:

retractObject in interface ObjectSink

Parameters:

handle - The handle of the fact to retract.

workingMemory - The working memory session.

context - The PropagationContext of the WorkingMemory action.

protected void addObjectSink(ObjectSink objectSink)

protected void removeObjectSink(ObjectSink objectSink)

public void attach()

public void attach(InternalWorkingMemory[] workingMemories)

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

public ObjectHashMap getObjectTypeNodes()

public Object createMemory(RuleBaseConfiguration config)

public int hashCode()

public boolean equals(Object object)

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