com.rubecula.darwin.core
Class Fecundity_Default

java.lang.Object
  com.rubecula.darwin.core.Fecundity_Abstract
      com.rubecula.darwin.core.Fecundity_Default

All Implemented Interfaces:

Fecundity

public final class Fecundity_Default
extends Fecundity_Abstract

Default implementation of Fecundity. Fecundity is defined according to population saturation. See the saturation thresholds: $DefaultSaturationThresholds.

Version:

$Revision: 1.2 $

Author:

Robin Hillyard

Field Summary

static double[]

$DefaultSaturationThresholds If less than 30% saturated, then fecundity = 4; else if less than 75% saturated, then fecundity = 3; else if less than 100% saturated, then fecundity = 2; else if less than 200% saturated, then fecundity = 1; else fecundity = 0;

Fields inherited from class com.rubecula.darwin.core.Fecundity_Abstract

log

Constructor Summary

Fecundity_Default()
Constructor using default saturation thresholds, viz.

Fecundity_Default(double[] saturationThresholds)
Constructor using default saturation thresholds, viz.

Method Summary

int	getFecundity(double saturation) Get the fecundity for a population whose saturation is given by saturation.

Methods inherited from class java.lang.Object

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

Field Detail

$DefaultSaturationThresholds

public static final double[] $DefaultSaturationThresholds

If less than 30% saturated, then fecundity = 4; else if less than 75% saturated, then fecundity = 3; else if less than 100% saturated, then fecundity = 2; else if less than 200% saturated, then fecundity = 1; else fecundity = 0;

Constructor Detail

Fecundity_Default

public Fecundity_Default()

Constructor using default saturation thresholds, viz. $DefaultSaturationThresholds.

Fecundity_Default

public Fecundity_Default(double[] saturationThresholds)

Constructor using default saturation thresholds, viz. $DefaultSaturationThresholds.

Parameters:

saturationThresholds - This is the array of saturation thresholds for calculating fecundity. The number of possible non-zero fecundity values which may result is equal to the number of thresholds in the array. The thresholds must be ordered from highest saturation to lowest saturation. A saturation value which is higher than the 0th element will result in a zero fecundity.

Method Detail

getFecundity

public int getFecundity(double saturation)

Get the fecundity for a population whose saturation is given by saturation. The fecundity is determined by a lookup table of thresholds which may be set via _SaturationThresholds and which defaults to $DefaultSaturationThresholds.

Parameters:

saturation - the fraction of the sustainable population which the population currently numbers. A population at the sustainable limit has a saturation of 1.

Returns:

a number greater than 0

See Also:

Fecundity.getFecundity(double)