com.aelitis.azureus.core.util.average
Class AverageFactory

java.lang.Object
  com.aelitis.azureus.core.util.average.AverageFactory

public abstract class AverageFactory
extends java.lang.Object

Generates different types of averages.

Nested Class Summary

static interface	AverageFactory.LazyMovingImmediateAverageAdapter<T>
static class	AverageFactory.LazyMovingImmediateAverageState

Constructor Summary

AverageFactory()

Method Summary

static ExponentialMovingAverage	ExponentialMovingAverage(float weight) Create an exponential moving average, with the given smoothing weight.
static ExponentialMovingAverage	ExponentialMovingAverage(int periods) Create an exponential moving average, smoothing over the given number of periods, using a default smoothing weight value of 2/(1 + periods).
static <T> long	LazyMovingImmediateAverage(int periods, int interval_secs, AverageFactory.LazyMovingImmediateAverageAdapter<T> adapter, T instance)
static <T> long	LazySmoothMovingImmediateAverage(AverageFactory.LazyMovingImmediateAverageAdapter<T> adapter, T instance) Creates an auto-updating immediate moving average that will auto-deactivate average maintenance when values are not being extracted from it, auto-reactivate when required etc.
static MovingAverage	MovingAverage(int periods) Create a moving average, that moves over the given number of periods.
static MovingImmediateAverage	MovingImmediateAverage(int periods) Create a moving average, that moves over the given number of periods and gives immediate results (i.e.
static RunningAverage	RunningAverage() Create a simple running average.

Methods inherited from class java.lang.Object

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

Constructor Detail

AverageFactory

public AverageFactory()

Method Detail

RunningAverage

public static RunningAverage RunningAverage()

Create a simple running average.

MovingAverage

public static MovingAverage MovingAverage(int periods)

Create a moving average, that moves over the given number of periods.

MovingImmediateAverage

public static MovingImmediateAverage MovingImmediateAverage(int periods)

Create a moving average, that moves over the given number of periods and gives immediate results (i.e. after the first update of X the average will be X

ExponentialMovingAverage

public static ExponentialMovingAverage ExponentialMovingAverage(int periods)

Create an exponential moving average, smoothing over the given number of periods, using a default smoothing weight value of 2/(1 + periods).

ExponentialMovingAverage

public static ExponentialMovingAverage ExponentialMovingAverage(float weight)

Create an exponential moving average, with the given smoothing weight. Larger weigths (closer to 1.0) will give more influence to recent data and smaller weights (closer to 0.00) will provide smoother averaging (give more influence to older data).

LazySmoothMovingImmediateAverage

public static <T> long LazySmoothMovingImmediateAverage(AverageFactory.LazyMovingImmediateAverageAdapter<T> adapter,
                                                        T instance)

Creates an auto-updating immediate moving average that will auto-deactivate average maintenance when values are not being extracted from it, auto-reactivate when required etc.

Parameters:

periods -

adapter -

instance -

Returns:

LazyMovingImmediateAverage

public static <T> long LazyMovingImmediateAverage(int periods,
                                                  int interval_secs,
                                                  AverageFactory.LazyMovingImmediateAverageAdapter<T> adapter,
                                                  T instance)