net.sourceforge.fuzzyservices.beans
Class FuzzyNumber

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

All Implemented Interfaces:

PropertyChangeListener, VetoableChangeListener, Serializable, EventListener

public class FuzzyNumber
extends Object
implements Serializable, PropertyChangeListener, VetoableChangeListener

This class represents a fuzzy number according to JavaBeans conventions.

Version:

1.0

Author:

Uwe Weng

See Also:

FuzzyNumber, Serialized Form

Field Summary

static String	MEMBERSHIP_FUNCTION_PROPERTY Bound property name for membershipFunction.
static String	NEGATIVE_PROPERTY Bound property name for negative.
static String	POSITIVE_PROPERTY Bound property name for positive.
static String	VALID_FUZZY_LR_NUMBER_PROPERTY Bound property name for validFuzzyLRNumber.

Constructor Summary

FuzzyNumber()
Default FuzzyNumber constructor.

Method Summary

void	addPropertyChangeListener(PropertyChangeListener listener) Adds a PropertyChangeListener to the listener list.
Object	clone()
boolean	equals(Object obj)
int	getId() Returns the technical identifier (e.g. within a database).
MembershipFunction	getMembershipFunction() Returns the membership function.
int	hashCode()
void	invert() Inverts this fuzzy number.
boolean	isNegative() Checks whether the fuzzy number is negative.
boolean	isPositive() Checks whether the fuzzy number is positive.
boolean	isValidFuzzyLRNumber() Checks whether the fuzzy number fulfills the requirements of a fuzzy LR number.
void	negate() Negates this fuzzy number.
void	propertyChange(PropertyChangeEvent evt)
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 number
void	vetoableChange(PropertyChangeEvent evt)

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

NEGATIVE_PROPERTY

public static final String NEGATIVE_PROPERTY

Bound property name for negative.

See Also:

Constant Field Values

POSITIVE_PROPERTY

public static final String POSITIVE_PROPERTY

Bound property name for positive.

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

Constructor Detail

FuzzyNumber

public FuzzyNumber()

Default FuzzyNumber constructor. This constructor creates a valid default fuzzy number with the coordinates (0.0, 0.0), (1.0, 1.0) and (2.0, 0.0).

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()

invert

public final void invert()
                  throws PropertyVetoException

Inverts this fuzzy number.

Throws:

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

isNegative

public final boolean isNegative()

Checks whether the fuzzy number is negative. A fuzzy number is negative if degree of membership is only greater than zero when x is lower than zero.

Returns:

true if fuzzy number is negative, false otherwise

isPositive

public final boolean isPositive()

Checks whether the fuzzy number is positive. A fuzzy number is positive if degree of membership is only greater than zero when x is also greater than zero.

Returns:

true if fuzzy number is positive, false otherwise

isValidFuzzyLRNumber

public final boolean isValidFuzzyLRNumber()

Checks whether the fuzzy number 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

negate

public final void negate()
                  throws PropertyVetoException

Negates this fuzzy number.

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

vetoableChange

public final void vetoableChange(PropertyChangeEvent evt)
                          throws PropertyVetoException

Specified by:

vetoableChange in interface VetoableChangeListener

Throws:

PropertyVetoException

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 number

Parameters:

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

Returns:

a string representation of the fuzzy number

See Also:

MembershipFunction.toString()