fr.cnes.sirius.patrius.time.interpolation

Enum TimeStampedInterpolableEphemeris.SearchMethod

java.lang.Object

java.lang.Enum<TimeStampedInterpolableEphemeris.SearchMethod>

fr.cnes.sirius.patrius.time.interpolation.TimeStampedInterpolableEphemeris.SearchMethod

All Implemented Interfaces:

Serializable, Comparable<TimeStampedInterpolableEphemeris.SearchMethod>

Enclosing class:

TimeStampedInterpolableEphemeris<IN extends TimeStamped,OUT>

public static enum TimeStampedInterpolableEphemeris.SearchMethod
extends Enum<TimeStampedInterpolableEphemeris.SearchMethod>

Enumerate to specify the search method used to find the correct samples interval given a certain date.

Enum Constant Summary

Enum Constants

Enum Constant and Description
DICHOTOMY This method only relies on indexes.
PROPORTIONAL This method tries to find the best guess for the next middle point by computing the position of the searched date as if the samples were evenly distributed.

Method Summary

Modifier and Type	Method and Description
abstract int	midPoint(int indexInf, int indexSup, AbsoluteDate dateInf, AbsoluteDate dateSup, AbsoluteDate date) Computes the middle point index in the range [indexInf ; indexSup].
static TimeStampedInterpolableEphemeris.SearchMethod	valueOf(String name) Returns the enum constant of this type with the specified name.
static TimeStampedInterpolableEphemeris.SearchMethod[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

DICHOTOMY

public static final TimeStampedInterpolableEphemeris.SearchMethod DICHOTOMY

This method only relies on indexes.
It simply cuts the remaining interval in half at each step. The complexity is O(log(n)).

PROPORTIONAL

public static final TimeStampedInterpolableEphemeris.SearchMethod PROPORTIONAL

This method tries to find the best guess for the next middle point by computing the position of the searched date as if the samples were evenly distributed.
If the samples are evenly distributed, the complexity is O(log(log(n))).
If it is not the case, the complexity is can be higher, up to O(n) if the samples are exponentially distributed for example.

Method Detail

values

public static TimeStampedInterpolableEphemeris.SearchMethod[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (TimeStampedInterpolableEphemeris.SearchMethod c : TimeStampedInterpolableEphemeris.SearchMethod.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static TimeStampedInterpolableEphemeris.SearchMethod valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null

midPoint

public abstract int midPoint(int indexInf,
                             int indexSup,
                             AbsoluteDate dateInf,
                             AbsoluteDate dateSup,
                             AbsoluteDate date)

Computes the middle point index in the range [indexInf ; indexSup].

Parameters:

indexInf - Inferior index

indexSup - Superior index

dateInf - Inferior date

dateSup - Superior date

date - The date to look for

Returns:

the middle point index