nrc.fuzzy.jess
Class FuzzyRete

java.lang.Object
  |
  +--jess.Rete
        |
        +--nrc.fuzzy.jess.FuzzyRete

All Implemented Interfaces:

java.util.EventListener, jess.JessListener, java.io.Serializable

public class FuzzyRete

extends jess.Rete

implements java.io.Serializable

The reasoning engine, extended to support fuzzy reasoning. Executes the built Rete network, and coordinates many other activities.

See Also:

Serialized Form

Field Summary

Fields inherited from class jess.Rete

ACTIVATE, EVERY_TIME, INSTALL

Constructor Summary

FuzzyRete()

FuzzyRete(java.applet.Applet a)

Method Summary

protected void	aboutToFire(jess.Activation a) Records the current activation during a rule firing.
int	doPreAssertionProcessing(jess.Fact f) Special preprocessing when asserting a fact with fuzzy values in it.
protected jess.Activation	getCurrentActivation() Get the current rule activation.
nrc.fuzzy.FuzzyRule	getCurrentActivationFuzzyRule() Get the current FuzzyRule in the activation.
nrc.fuzzy.jess.GlobalContributionOperator	getFuzzyGlobalContributionOperator() Gets the current GlobalContributionOperator object that implements the execute method to do global contribution.
java.util.Vector	getFuzzyMatchesInActivation(jess.Activation a) Finds any Fuzzy matches (antecedent/input pairs) that were made on the LHS of the rule.
protected void	justFired(jess.Activation a) Clears the current activation when a rule finishes firing.
boolean	setFuzzyGlobalContributionOperator(nrc.fuzzy.jess.GlobalContributionOperator op) Sets the type of global contribution to do.

Methods inherited from class jess.Rete

addDeffacts, addDefglobal, addDefmodule, addDefmodule, addDefrule, addDeftemplate, addInputRouter, addJessListener, addOutputRouter, addUserfunction, addUserpackage, assert, assert, assertFact, assertFact, assertString, assertString, bload, bsave, clear, clearFocusStack, clearStorage, defclass, definstance, definstance, eventHappened, executeCommand, executeCommand, fetch, findClass, findDeffacts, findDefglobal, findDefrule, findDeftemplate, findFactByFact, findFactByID, findUserfunction, getActivationSemaphore, getApplet, getAppObjectClass, getCurrentModule, getErrStream, getEvalSalience, getEventMask, getFactory, getFocus, getGlobalContext, getInputMode, getInputRouter, getOutputRouter, getOutStream, getResetGlobals, getStrategy, getSupportedFacts, getSupportingTokens, getThisActivation, getThisRuleName, halt, importClass, importPackage, javaClassForDefclass, listActivations, listActivations, listDefclasses, listDeffacts, listDefglobals, listDefinstances, listDefrules, listDeftemplates, listFacts, listFocusStack, listFunctions, listJessListeners, listModules, modify, modify, popFocus, ppFacts, ppFacts, removeInputRouter, removeJessListener, removeOutputRouter, reset, resolveName, retract, retractString, run, run, runQuery, runUntilHalt, setApplet, setAppObject, setCurrentModule, setEvalSalience, setEventMask, setFactory, setFocus, setPendingFact, setResetGlobals, setStrategy, store, store, toString, undefinstance, unDefrule, unwatch, unwatchAll, updateObject, verifyModule, waitForActivations, watch, watchAll

Methods inherited from class java.lang.Object

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

Constructor Detail

FuzzyRete

public FuzzyRete()

FuzzyRete

public FuzzyRete(java.applet.Applet a)

Parameters:

a -

Method Detail

getFuzzyMatchesInActivation

public java.util.Vector getFuzzyMatchesInActivation(jess.Activation a)

Finds any Fuzzy matches (antecedent/input pairs) that were made on the LHS of the rule. When a fuzzy match was made (fuzzy-match function) the pairs were stored in the appropriate token (in the special extensionData slot) which ultimately was linked in the m_token slot of the activation.

Parameters:

a - The rule activation to be searched for Fuzzy matches.

Returns:

A Vector with the fuzzy match pairs or null if no match pairs

doPreAssertionProcessing

public int doPreAssertionProcessing(jess.Fact f)
                             throws jess.JessException

Special preprocessing when asserting a fact with fuzzy values in it. Some special additions for dealing with fuzzy facts and fuzzy inferencing. In particular the FuzzyValues in the asserted fact will be modified if there are fuzzy matches on the LHS of the rule and if there exists an equivalent fact with fuzzy values already, that fact and the new one are combined (fuzzy global contribution).

Overrides:

doPreAssertionProcessing in class jess.Rete

Parameters:

f - the fact being asserted

Returns:

int

Throws:

jess.JessException

getCurrentActivation

protected jess.Activation getCurrentActivation()

Get the current rule activation.

getCurrentActivationFuzzyRule

public nrc.fuzzy.FuzzyRule getCurrentActivationFuzzyRule()

Get the current FuzzyRule in the activation.

aboutToFire

protected void aboutToFire(jess.Activation a)

Records the current activation during a rule firing.

Overrides:

aboutToFire in class jess.Rete

justFired

protected void justFired(jess.Activation a)

Clears the current activation when a rule finishes firing.

Overrides:

justFired in class jess.Rete

setFuzzyGlobalContributionOperator

public boolean setFuzzyGlobalContributionOperator(nrc.fuzzy.jess.GlobalContributionOperator op)

Sets the type of global contribution to do. Wil normally be one of:
a UnionGlobalContributionOperator - do a fuzzy union of FuzzyValues
a SumGlobalContributionOperator - do a fuzzy Sum of FuzzyValues
null - do no global contribution (replace with new FuzzyValues)

Parameters:

op - the GlobalContributionOperator that provides the required execute method to combine the new and existing fuzzy values when global contribution is being done.

Returns:

true if successful else false (actually can't fail)

getFuzzyGlobalContributionOperator

public nrc.fuzzy.jess.GlobalContributionOperator getFuzzyGlobalContributionOperator()

Gets the current GlobalContributionOperator object that implements the execute method to do global contribution. Will normally be one of:
a UnionGlobalContributionOperator - do a fuzzy union of FuzzyValues
a SumGlobalContributionOperator - do a fuzzy Sum of FuzzyValues
null - do no global contribution (replace with new FuzzyValues)

Returns:

an GlobalContributionOperator object or null.