Package jadex.rules.rulesystem.rete.nodes

Class AlphaNode

java.lang.Object

jadex.rules.rulesystem.rete.nodes.AbstractNode

jadex.rules.rulesystem.rete.nodes.AlphaNode

All Implemented Interfaces:

INode, IObjectConsumerNode, IObjectSourceNode, java.lang.Cloneable

Direct Known Subclasses:

TypeNode

public class AlphaNode
extends AbstractNode
implements IObjectConsumerNode, IObjectSourceNode

An alpha node is a 1-input -> 1-output node which propagates objects matching its constraints.

Field Summary

Fields

Modifier and Type	Field	Description
protected IConstraintEvaluator[]	evaluators	The constraint evaluator.
protected AttributeSet	indirects	The set of indirect attributes.
protected IObjectConsumerNode[]	oconsumers	The object consumers.
protected IObjectSourceNode	osource	The object source.
protected AttributeSet	relevants	The set of relevant attributes.

Fields inherited from class jadex.rules.rulesystem.rete.nodes.AbstractNode

clones, nodeid

Constructor Summary

Constructors

Constructor	Description
AlphaNode(int nodeid, IConstraintEvaluator[] evaluators)	Create a new node.

Method Summary

Modifier and Type	Method	Description
void	addObject(java.lang.Object object, IOAVState state, ReteMemory mem, AbstractAgenda agenda)	Send a new object to this node.
void	addObjectConsumer(IObjectConsumerNode node)	Add an object consumer node.
protected boolean	checkConstraints(java.lang.Object right, IOAVState state)	Check the constraints with respect to the object.
java.lang.Object	createNodeMemory(IOAVState state)	Create the node memory.
protected void	doClone(java.lang.Object theclone)	Do clone makes a deep clone without regarding cycles.
IConstraintEvaluator[]	getConstraintEvaluators()	Get the constraint evaluators.
AttributeSet	getIndirectAttributes()	Get the set of indirect attribute types.
java.util.Collection	getNodeMemory(ReteMemory mem)	Get the memory for this node.
IObjectConsumerNode[]	getObjectConsumers()	Get all object consumer nodes.
IObjectSourceNode	getObjectSource()	Get the object source of this node.
AttributeSet	getRelevantAttributes()	Get the set of relevant attribute types.
boolean	isAffected(OAVAttributeType attr)	Test if the node is affected from a modification.
void	modifyIndirectObject(java.lang.Object id, OAVAttributeType type, java.lang.Object oldvalue, java.lang.Object newvalue, IOAVState state, ReteMemory mem, AbstractAgenda agenda)	Propagate an indirect object change to this node.
void	modifyObject(java.lang.Object object, OAVAttributeType type, java.lang.Object oldvalue, java.lang.Object newvalue, IOAVState state, ReteMemory mem, AbstractAgenda agenda)	Propagate an object change to this node.
protected void	propagateAdditionToObjectConsumers(java.lang.Object object, IOAVState state, ReteMemory mem, AbstractAgenda agenda)	Propagate a new object to all object consumers.
protected void	propagateModificationToObjectConsumers(java.lang.Object object, OAVAttributeType type, java.lang.Object oldvalue, java.lang.Object newvalue, IOAVState state, ReteMemory mem, AbstractAgenda agenda)	Propagate a modified object to all object consumers.
protected void	propagateRemovalToObjectConsumers(java.lang.Object object, IOAVState state, ReteMemory mem, AbstractAgenda agenda)	Propagate a removed object to all object consumers.
void	removeObject(java.lang.Object object, IOAVState state, ReteMemory mem, AbstractAgenda agenda)	Send a removed object to this node.
void	removeObjectConsumer(IObjectConsumerNode node)	Remove an object consumer.
void	setObjectSource(IObjectSourceNode node)	Set the object source of this node.
java.lang.String	toString()	Get the string representation.

Methods inherited from class jadex.rules.rulesystem.rete.nodes.AbstractNode

checkNodeConsistency, clone, equals, getNodeId, hashCode, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface jadex.rules.rulesystem.rete.nodes.INode

checkNodeConsistency, clone, getNodeId

Field Detail

osource

protected IObjectSourceNode osource

The object source.

oconsumers

protected IObjectConsumerNode[] oconsumers

The object consumers.

evaluators

protected IConstraintEvaluator[] evaluators

The constraint evaluator.

relevants

protected volatile AttributeSet relevants

The set of relevant attributes.

indirects

protected volatile AttributeSet indirects

The set of indirect attributes.

Constructor Detail

AlphaNode

public AlphaNode(int nodeid,
                 IConstraintEvaluator[] evaluators)

Create a new node.

Parameters:

evaluators - The evaluators.

Method Detail

addObject

public void addObject(java.lang.Object object,
                      IOAVState state,
                      ReteMemory mem,
                      AbstractAgenda agenda)

Send a new object to this node.

Specified by:

addObject in interface IObjectConsumerNode

Parameters:

object - The object.

removeObject

public void removeObject(java.lang.Object object,
                         IOAVState state,
                         ReteMemory mem,
                         AbstractAgenda agenda)

Send a removed object to this node.

Specified by:

removeObject in interface IObjectConsumerNode

Parameters:

object - The object.

modifyObject

public void modifyObject(java.lang.Object object,
                         OAVAttributeType type,
                         java.lang.Object oldvalue,
                         java.lang.Object newvalue,
                         IOAVState state,
                         ReteMemory mem,
                         AbstractAgenda agenda)

Propagate an object change to this node.

Specified by:

modifyObject in interface IObjectConsumerNode

Parameters:

object - The new object.

modifyIndirectObject

public void modifyIndirectObject(java.lang.Object id,
                                 OAVAttributeType type,
                                 java.lang.Object oldvalue,
                                 java.lang.Object newvalue,
                                 IOAVState state,
                                 ReteMemory mem,
                                 AbstractAgenda agenda)

Propagate an indirect object change to this node.

Specified by:

modifyIndirectObject in interface INode

Parameters:

id - The changed object.

setObjectSource

public void setObjectSource(IObjectSourceNode node)

Set the object source of this node.

Specified by:

setObjectSource in interface IObjectConsumerNode

Parameters:

node - The object source node.

getObjectSource

public IObjectSourceNode getObjectSource()

Get the object source of this node.

Specified by:

getObjectSource in interface IObjectConsumerNode

Returns:

The object source node.

addObjectConsumer

public void addObjectConsumer(IObjectConsumerNode node)

Add an object consumer node.

Specified by:

addObjectConsumer in interface IObjectSourceNode

Parameters:

node - A new consumer node.

removeObjectConsumer

public void removeObjectConsumer(IObjectConsumerNode node)

Remove an object consumer.

Specified by:

removeObjectConsumer in interface IObjectSourceNode

Parameters:

node - The consumer node.

getNodeMemory

public java.util.Collection getNodeMemory(ReteMemory mem)

Get the memory for this node.

Specified by:

getNodeMemory in interface INode

Specified by:

getNodeMemory in interface IObjectSourceNode

Returns:

The memory.

getObjectConsumers

public IObjectConsumerNode[] getObjectConsumers()

Get all object consumer nodes.

Specified by:

getObjectConsumers in interface IObjectSourceNode

Returns:

All object consumer nodes.

createNodeMemory

public java.lang.Object createNodeMemory(IOAVState state)

Create the node memory.

Specified by:

createNodeMemory in interface INode

Parameters:

state - The state.

Returns:

The node memory.

propagateAdditionToObjectConsumers

protected void propagateAdditionToObjectConsumers(java.lang.Object object,
                                                  IOAVState state,
                                                  ReteMemory mem,
                                                  AbstractAgenda agenda)

Propagate a new object to all object consumers.

Parameters:

object - The new object.

propagateRemovalToObjectConsumers

protected void propagateRemovalToObjectConsumers(java.lang.Object object,
                                                 IOAVState state,
                                                 ReteMemory mem,
                                                 AbstractAgenda agenda)

Propagate a removed object to all object consumers.

Parameters:

object - The new object.

propagateModificationToObjectConsumers

protected void propagateModificationToObjectConsumers(java.lang.Object object,
                                                      OAVAttributeType type,
                                                      java.lang.Object oldvalue,
                                                      java.lang.Object newvalue,
                                                      IOAVState state,
                                                      ReteMemory mem,
                                                      AbstractAgenda agenda)

Propagate a modified object to all object consumers.

Parameters:

object - The new object.

checkConstraints

protected boolean checkConstraints(java.lang.Object right,
                                   IOAVState state)

Check the constraints with respect to the object.

Returns:

True, if object fits constraints.

isAffected

public boolean isAffected(OAVAttributeType attr)

Test if the node is affected from a modification.

Parameters:

type - The attribute type.

Returns:

True, if possibly affected.

getRelevantAttributes

public AttributeSet getRelevantAttributes()

Get the set of relevant attribute types.

Specified by:

getRelevantAttributes in interface INode

getIndirectAttributes

public AttributeSet getIndirectAttributes()

Get the set of indirect attribute types. I.e. attributes of objects, which are not part of an object conditions (e.g. for chained extractors)

Specified by:

getIndirectAttributes in interface INode

Returns:

The relevant attribute types.

toString

public java.lang.String toString()

Get the string representation.

Overrides:

toString in class AbstractNode

Returns:

The string representation.

getConstraintEvaluators

public IConstraintEvaluator[] getConstraintEvaluators()

Get the constraint evaluators.

doClone

protected void doClone(java.lang.Object theclone)

Do clone makes a deep clone without regarding cycles. Method is overridden by subclasses to actually incorporate their attributes.

Specified by:

doClone in class AbstractNode

Parameters:

theclone - The clone.