org.spectrumauctions.sats.core.util.math

Class ContinuousPiecewiseLinearFunction

java.lang.Object

org.spectrumauctions.sats.core.util.math.ContinuousPiecewiseLinearFunction

All Implemented Interfaces:

Function

public final class ContinuousPiecewiseLinearFunction
extends Object
implements Function

Author:

Michael Weiss

Constructor Summary

Constructors

Constructor and Description
ContinuousPiecewiseLinearFunction(Map<BigDecimal,BigDecimal> cornerPoints) Constructs a new PieceWiseLinear function with a restricted domain interval

Method Summary

Modifier and Type	Method and Description
LinearFunction	functionAt(BigDecimal x)
List<AbstractMap.SimpleImmutableEntry<BigDecimal,BigDecimal>>	getCornerPoints() Provides a list with all corner point (X, Y) pairs, sorted with increasing X.
BigDecimal	getY(BigDecimal x)

Methods inherited from class java.lang.Object

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

Constructor Detail

ContinuousPiecewiseLinearFunction

public ContinuousPiecewiseLinearFunction(Map<BigDecimal,BigDecimal> cornerPoints)

Constructs a new PieceWiseLinear function with a restricted domain interval

Parameters:

cornerPoints - A map with key = x-values and value = y-values. The map has to include all corner points of the function, including lower and upper end of domain.

Method Detail

getCornerPoints

public List<AbstractMap.SimpleImmutableEntry<BigDecimal,BigDecimal>> getCornerPoints()

Provides a list with all corner point (X, Y) pairs, sorted with increasing X. The return type is a list (instead of a sorted map) to allow easy indexing.

Returns:

a list of the corner points

getY

public BigDecimal getY(BigDecimal x)

Specified by:

getY in interface Function

functionAt

public LinearFunction functionAt(BigDecimal x)
                          throws NotDifferentiableException

Throws:

NotDifferentiableException