net.sourceforge.fuzzyservices.beans
Class FuzzySet

java.lang.Object
  net.sourceforge.fuzzyservices.beans.FuzzySet

All Implemented Interfaces:

PropertyChangeListener, Serializable, EventListener

public class FuzzySet
extends Object
implements Serializable, PropertyChangeListener

This class represents a fuzzy setDegreeOfMembership according to JavaBeans conventions.

Version:

1.0

Author:

Uwe Weng

See Also:

FuzzySet, Serialized Form

Field Summary

static String	CONVEX_PROPERTY Bound property name for convex.
static String	HEIGHT_PROPERTY Bound property name for height.
static String	MEMBERSHIP_FUNCTION_PROPERTY Bound property name for membershipFunction.
static String	NORMALIZED_PROPERTY Bound property name for normalized.
static String	VALID_FUZZY_INTERVAL_PROPERTY Bound property name for validFuzzyInterval.
static String	VALID_FUZZY_LR_INTERVAL_PROPERTY Bound property name for validFuzzyLRInterval.
static String	VALID_FUZZY_LR_NUMBER_PROPERTY Bound property name for validFuzzyLRNumber.
static String	VALID_FUZZY_NUMBER_PROPERTY Bound property name for validFuzzyLRNumber.

Constructor Summary

FuzzySet()
Default FuzzySet constructor.

FuzzySet(MembershipFunction newMembershipFunction)
Creates a new FuzzySet.

Method Summary

void	addPropertyChangeListener(PropertyChangeListener listener) Adds a PropertyChangeListener to the listener list.
Object	clone()
void	concentrate() Concentrates this fuzzy setDegreeOfMembership.
void	dilate() Dilates this fuzzy setDegreeOfMembership.
boolean	equals(Object obj)
float	getHeight() Returns the height of this fuzzy set.
int	getId() Returns the technical identifier (e.g. within a database).
MembershipFunction	getMembershipFunction() Returns the membership function.
int	hashCode()
boolean	isConvex() Checks whether the membership function is convex.
boolean	isNormalized() Checks whether the membership function is normalized.
boolean	isValidFuzzyInterval() Checks whether the fuzzy set fulfills the requirements of a fuzzy interval.
boolean	isValidFuzzyLRInterval() Checks whether the fuzzy set fulfills the requirements of a fuzzy LR interval.
boolean	isValidFuzzyLRNumber() Checks whether the fuzzy set fulfills the requirements of a fuzzy LR number.
boolean	isValidFuzzyNumber() Checks whether the fuzzy set fulfills the requirements of a fuzzy number.
void	normalize() Normalizes this fuzzy set.
void	propertyChange(PropertyChangeEvent evt)
void	reciproce() Computes the reciproce fuzzy set.
void	removePropertyChangeListener(PropertyChangeListener listener) Removes a PropertyChangeListener from the listener list.
void	setMembershipFunction(MembershipFunction newMembershipFunction) Sets the membership function.
String	toString()
String	toString(boolean withMembershipFunction) Returns a textual representation of the fuzzy set

Methods inherited from class java.lang.Object

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

Field Detail

MEMBERSHIP_FUNCTION_PROPERTY

public static final String MEMBERSHIP_FUNCTION_PROPERTY

Bound property name for membershipFunction.

See Also:

Constant Field Values

CONVEX_PROPERTY

public static final String CONVEX_PROPERTY

Bound property name for convex.

See Also:

Constant Field Values

HEIGHT_PROPERTY

public static final String HEIGHT_PROPERTY

Bound property name for height.

See Also:

Constant Field Values

NORMALIZED_PROPERTY

public static final String NORMALIZED_PROPERTY

Bound property name for normalized.

See Also:

Constant Field Values

VALID_FUZZY_NUMBER_PROPERTY

public static final String VALID_FUZZY_NUMBER_PROPERTY

Bound property name for validFuzzyLRNumber.

See Also:

Constant Field Values

VALID_FUZZY_LR_NUMBER_PROPERTY

public static final String VALID_FUZZY_LR_NUMBER_PROPERTY

Bound property name for validFuzzyLRNumber.

See Also:

Constant Field Values

VALID_FUZZY_INTERVAL_PROPERTY

public static final String VALID_FUZZY_INTERVAL_PROPERTY

Bound property name for validFuzzyInterval.

See Also:

Constant Field Values

VALID_FUZZY_LR_INTERVAL_PROPERTY

public static final String VALID_FUZZY_LR_INTERVAL_PROPERTY

Bound property name for validFuzzyLRInterval.

See Also:

Constant Field Values

Constructor Detail

FuzzySet

public FuzzySet()

Default FuzzySet constructor.

FuzzySet

public FuzzySet(MembershipFunction newMembershipFunction)

Creates a new FuzzySet.

Parameters:

newMembershipFunction - membership function of the fuzzy set

Method Detail

getId

public int getId()

Returns the technical identifier (e.g. within a database).

Returns:

the ID

getMembershipFunction

public final MembershipFunction getMembershipFunction()

Returns the membership function.

Returns:

the membershipFunction property

See Also:

setMembershipFunction(MembershipFunction)

setMembershipFunction

public final void setMembershipFunction(MembershipFunction newMembershipFunction)

Sets the membership function.

Parameters:

newMembershipFunction - The new value for the property.

See Also:

getMembershipFunction()

concentrate

public final void concentrate()
                       throws PropertyVetoException

Concentrates this fuzzy setDegreeOfMembership.

Throws:

PropertyVetoException - when the attempt to set the property is vetoed by a listener

dilate

public final void dilate()
                  throws PropertyVetoException

Dilates this fuzzy setDegreeOfMembership.

Throws:

PropertyVetoException - when the attempt to set the property is vetoed by a listener

getHeight

public final float getHeight()

Returns the height of this fuzzy set.

Returns:

the current height

isConvex

public final boolean isConvex()

Checks whether the membership function is convex. A membership function is convex if there is only one change of sign from + to -.

Returns:

true if membership function is convex false, otherwise

isNormalized

public final boolean isNormalized()

Checks whether the membership function is normalized. A membership function is normalized if its height is 1.0.

Returns:

true if membership function is normalized false, otherwise

See Also:

getHeight()

isValidFuzzyInterval

public final boolean isValidFuzzyInterval()

Checks whether the fuzzy set fulfills the requirements of a fuzzy interval. The membership function has to be convex and normalized. In addition, the maximum has to lie between a closed interval ([a,b] with a != b).

Returns:

true if the membership function would be a fuzzy interval false, otherwise

See Also:

isNormalized(), isConvex()

isValidFuzzyLRInterval

public final boolean isValidFuzzyLRInterval()

Checks whether the fuzzy set fulfills the requirements of a fuzzy LR interval. In addition to the requirements for a fuzzy interval the membership function must be represented by two reference function L and R.

Returns:

true if the fuzzy set would be a fuzzy LR interval false, otherwise

See Also:

isValidFuzzyInterval()

isValidFuzzyLRNumber

public final boolean isValidFuzzyLRNumber()

Checks whether the fuzzy set fulfills the requirements of a fuzzy LR number. In addition to the requirements for a fuzzy number the membership function must be represented by two reference function L and R.

Returns:

true if the fuzzy set would be a fuzzy LR number false, otherwise

See Also:

isValidFuzzyNumber()

isValidFuzzyNumber

public final boolean isValidFuzzyNumber()

Checks whether the fuzzy set fulfills the requirements of a fuzzy number. The membership function has to be convex and normalized. In addition, the maximum is reached at one point.

Returns:

true if the fuzzy set would be a fuzzy number false, otherwise

See Also:

isNormalized(), isConvex()

normalize

public final void normalize()
                     throws PropertyVetoException

Normalizes this fuzzy set.

Throws:

PropertyVetoException - when the attempt to set the property is vetoed by a listener

reciproce

public final void reciproce()
                     throws PropertyVetoException

Computes the reciproce fuzzy set.

Throws:

PropertyVetoException - when the attempt to set the property is vetoed by a listener

addPropertyChangeListener

public final void addPropertyChangeListener(PropertyChangeListener listener)

Adds a PropertyChangeListener to the listener list. The listener is registered for all properties.

A PropertyChangeEvent will get fired in response to setting a bound property.

Parameters:

listener - the PropertyChangeListener to be added

removePropertyChangeListener

public final void removePropertyChangeListener(PropertyChangeListener listener)

Removes a PropertyChangeListener from the listener list. This removes a PropertyChangeListener that was registered for all properties.

Parameters:

listener - the PropertyChangeListener to be removed

propertyChange

public final void propertyChange(PropertyChangeEvent evt)

Specified by:

propertyChange in interface PropertyChangeListener

clone

public Object clone()

Overrides:

clone in class Object

equals

public final boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object

toString

public String toString(boolean withMembershipFunction)

Returns a textual representation of the fuzzy set

Parameters:

withMembershipFunction - true if all points of membership function are also returned, false otherwise.

Returns:

a string representation of the fuzzy set

See Also:

MembershipFunction.toString()