jeops.rete
Class FinalReteNode

java.lang.Object
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  +--jeops.rete.ReteNode
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        +--jeops.rete.FinalReteNode

public class FinalReteNode

extends ReteNode

A final node in the Rete network. There will be one final node for each rule in the rule base; when objects arrive at a final node, they are stored in a conflict set element and inserted into the conflict set of the knowledge base.

Version:

1.0 14 Jul 2000

Author:

Carlos Figueira Filho (csff@cin.ufpe.br)

Field Summary

private java.lang.Object[]	ARRAY Object array, defined as an attribute for efficiency purposes only.
private AbstractKnowledgeBase	knowledgeBase The knowledge base that will receive the elements to pass them to the conflict set.
private int	ruleIndex The index of the rule correspondent to this node.

Fields inherited from class jeops.rete.ReteNode

numberInputs, numberOutputs, successors

Constructor Summary

FinalReteNode(int numberInputs, AbstractKnowledgeBase knowledgeBase, int ruleIndex)
Creates a new discriminant rete node.

Method Summary

void	flush() Remove all objects that may be stored in this node.
void	newObject(java.lang.Object obj, int input) Informs this node that an object has arrived.
void	remove(java.lang.Object obj) Remove the following objects that may be stored in this node.
java.lang.String	toString() Returns a string representation of this object.

Methods inherited from class jeops.rete.ReteNode

addSuccessor, addSuccessor, addSuccessor, getNumberInputs, getNumberOutputs, getSuccessors, propagate

Methods inherited from class java.lang.Object

, clone, equals, finalize, getClass, hashCode, notify, notifyAll, registerNatives, wait, wait, wait

Field Detail

knowledgeBase

private AbstractKnowledgeBase knowledgeBase

The knowledge base that will receive the elements to pass them to the conflict set. As the conflict set can be changed when the program is being executed, it is easier to concentrate the insertion of elements in the conflict set at one single point (the knowledge base), and have all final nodes to refer that point.

ruleIndex

private int ruleIndex

The index of the rule correspondent to this node.

ARRAY

private final java.lang.Object[] ARRAY

Object array, defined as an attribute for efficiency purposes only.

Constructor Detail

FinalReteNode

public FinalReteNode(int numberInputs,
                     AbstractKnowledgeBase knowledgeBase,
                     int ruleIndex)

Creates a new discriminant rete node.

Parameters:

numberInputs - the number of inputs of this node.

knowledgeBase - the knowledge base to where the elements will be sent.

ruleIndex - the index of the rule that will be stored in the conflict set by the propagation of objects arriving at this final node.

Method Detail

flush

public void flush()

Remove all objects that may be stored in this node. As no information is stored in this node, and it has no successors, this method has been overriden for performance reasons.

newObject

public void newObject(java.lang.Object obj,
                      int input)

Informs this node that an object has arrived.

Overrides:

newObject in class ReteNode

Parameters:

obj - the object that arrived at this node.

input - the input number of this node that is to receive the object. This node has only one input, so this parameter is not considered in objects of this class.

remove

public void remove(java.lang.Object obj)

Remove the following objects that may be stored in this node. As no information is stored in this node, and it has no successors, this method has been overriden for performance reasons.

toString

public java.lang.String toString()

Returns a string representation of this object. Useful for debugging.

Overrides:

toString in class java.lang.Object

Returns:

a string representation of this object.