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jmt.measurement
Class RankingStrategyFactory

java.lang.Object
  |
  +--jmt.measurement.RankingStrategyFactory

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public final class RankingStrategyFactory

extends java.lang.Object

A static factory providing methods to create diffrent types of ranking strategies and the rank points to describe rank curves.

Provided ranking-strategies:

Linear interpolation	interpolates straight lines between the rank points by ignoring the weight.
Nearest value interpolation	interpolates by using the nearest fix-point's rank value to calculate the rank of the measurement value.
Plateau interpolation	interpolates using bezier line between to neighboured rank-points. The weights may in a range of 0 to 1. A weight of zero (or below) means no 'rounding' and 1 (or higher) means the maximum 'rounding'.

Author:

Martin Kersten

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Constructor Summary

RankingStrategyFactory()

 

Method Summary
static RankingStrategy	createLinearInterpolation(RankingPoint[] points)           Returns a new RankingStrategy instance using linear interpolation for rank calculation.
static RankingStrategy	createNearestValueInterpolation(RankingPoint[] points)           Returns a new RankingStrategy instance using nearest value interpolation for rank calculation.
static RankingStrategy	createPlateauInterpolation(RankingPoint[] points)           Returns a new RankingStrategy instance using plateau interpolation for rank calculation.
static RankingPoint	createPoint(double value, double rank)           Returns a RankingPoint instance representing the given value and rank.
static RankingPoint	createPoint(double value, double rank, double weight)           Returns a RankingPoint instance representing the given value, rank and weight.
static RankingPoint	createPoint(double value, double rank, double leftWeight, double rightWeight)           Returns a RankingPoint instance representing the given value, rank and weights.

 

Methods inherited from class java.lang.Object

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

 

Constructor Detail

RankingStrategyFactory

public RankingStrategyFactory()

Method Detail

createLinearInterpolation

public static RankingStrategy createLinearInterpolation(RankingPoint[] points)

Returns a new RankingStrategy instance using linear interpolation for rank calculation.

Parameters:

points - The ranking points defining the ranking function

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createNearestValueInterpolation

public static RankingStrategy createNearestValueInterpolation(RankingPoint[] points)

Returns a new RankingStrategy instance using nearest value interpolation for rank calculation.

Parameters:

points - The ranking points defining the ranking function

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createPlateauInterpolation

public static RankingStrategy createPlateauInterpolation(RankingPoint[] points)

Returns a new RankingStrategy instance using plateau interpolation for rank calculation.

Parameters:

points - The ranking points defining the ranking function

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createPoint

public static RankingPoint createPoint(double value,
                                       double rank)

Returns a RankingPoint instance representing the given value and rank. The weights will be set to one.

Parameters:

value - The value of the ranking point

rank - The rank of the ranking point

Returns:

A RankingPoint instance representing the given value and rank

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createPoint

public static RankingPoint createPoint(double value,
                                       double rank,
                                       double weight)

Returns a RankingPoint instance representing the given value, rank and weight.

Parameters:

value - The value of the ranking point

rank - The rank of the ranking point

weight - The weight of the ranking point

Returns:

A RankingPoint instance representing the given value, rank and weight.

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createPoint

public static RankingPoint createPoint(double value,
                                       double rank,
                                       double leftWeight,
                                       double rightWeight)

Returns a RankingPoint instance representing the given value, rank and weights.

Parameters:

value - The value of the ranking point

rank - The rank of the ranking point

leftWeight - The left weight of the ranking point

rightWeight - The right weight of the ranking point

Returns:

A RankingPoint instance representing the given value, rank and weight.

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