Package org.moeaframework.core.constraint

Class ThresholdConstraint

java.lang.Object

org.moeaframework.core.constraint.AbstractConstraint

org.moeaframework.core.constraint.ThresholdConstraint

All Implemented Interfaces:

Serializable, Comparable<Constraint>, Constraint, Copyable<Constraint>, Defined, Named

Direct Known Subclasses:

Equal, GreaterThan, GreaterThanOrEqual, LessThan, LessThanOrEqual, NotEqual

public abstract class ThresholdConstraint
extends AbstractConstraint

Abstract class for constraints of the form <value> <op> <threshold>. To handle numerical precision when comparing floating-point values, a small epsilon difference is permitted, which by default is Settings.EPS.

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface org.moeaframework.core.Defined

Defined.ConstructorComparator

Field Summary

Fields

Modifier and Type	Field	Description
protected final double	epsilon	The epsilon or numerical precision of this constraint.
protected final double	threshold	The threshold value for this constraint.

Fields inherited from class org.moeaframework.core.constraint.AbstractConstraint

name, value

Constructor Summary

Constructors

Constructor	Description
ThresholdConstraint(double threhsold)	Constructs a new threshold constraint.
ThresholdConstraint(double threshold, double epsilon)	Constructs a new threshold constraint.
ThresholdConstraint(String name, double threhsold)	Constructs a new threshold constraint.
ThresholdConstraint(String name, double threshold, double epsilon)	Constructs a new threshold constraint.
ThresholdConstraint(ThresholdConstraint copy)	Constructs a copy of a threshold constraint.

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object obj)
String	getDefinition()	Returns the string representation, or definition, of this object.
double	getEpsilon()	Returns the epsilon value used for numeric precision.
double	getThreshold()	Returns the threshold value.
int	hashCode()
String	toString()

Methods inherited from class org.moeaframework.core.constraint.AbstractConstraint

getName, getValue, setValue

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.moeaframework.core.constraint.Constraint

compareTo, getMagnitudeOfViolation, isViolation, withValue

Methods inherited from interface org.moeaframework.core.Copyable

copy

Field Details

threshold

protected final double threshold

The threshold value for this constraint.

epsilon

protected final double epsilon

The epsilon or numerical precision of this constraint.

Constructor Details

ThresholdConstraint

public ThresholdConstraint(double threhsold)

Constructs a new threshold constraint.

Parameters:

threhsold - the threshold value

ThresholdConstraint

public ThresholdConstraint(double threshold,
 double epsilon)

Constructs a new threshold constraint.

Parameters:

threshold - the threshold value

epsilon - the epsilon value

ThresholdConstraint

public ThresholdConstraint(String name,
 double threhsold)

Constructs a new threshold constraint.

Parameters:

name - the name

threhsold - the threshold value

ThresholdConstraint

public ThresholdConstraint(String name,
 double threshold,
 double epsilon)

Constructs a new threshold constraint.

Parameters:

name - the name

threshold - the threshold value

epsilon - the epsilon value

ThresholdConstraint

public ThresholdConstraint(ThresholdConstraint copy)

Constructs a copy of a threshold constraint.

Parameters:

copy - the copy

Method Details

getThreshold

public double getThreshold()

Returns the threshold value.

Returns:

the threshold value

getEpsilon

public double getEpsilon()

Returns the epsilon value used for numeric precision.

Returns:

the epsilon value

getDefinition

public String getDefinition()

Description copied from interface: Defined

Returns the string representation, or definition, of this object.

Returns:

the definition

toString

public String toString()

Overrides:

toString in class AbstractConstraint

hashCode

public int hashCode()

Overrides:

hashCode in class AbstractConstraint

equals

public boolean equals(Object obj)

Overrides:

equals in class AbstractConstraint