umontreal.iro.lecuyer.hups

Class CycleBasedPointSet.CycleBasedPointSetIterator

java.lang.Object

umontreal.iro.lecuyer.hups.CycleBasedPointSet.CycleBasedPointSetIterator

All Implemented Interfaces:

PointSetIterator, RandomStream

Direct Known Subclasses:

CycleBasedPointSetBase2.CycleBasedPointSetBase2Iterator

Enclosing class:

CycleBasedPointSet

public class CycleBasedPointSet.CycleBasedPointSetIterator
extends java.lang.Object

Constructor Summary

Constructors

Constructor and Description
CycleBasedPointSet.CycleBasedPointSetIterator()

Method Summary

Methods

Modifier and Type	Method and Description
java.lang.String	formatState()
boolean	hasNextCoordinate() Returns true if the current point has another coordinate.
double	nextCoordinate() Returns the current coordinate ui, j and advances to the next one.
void	nextCoordinates(double[] p, int dim) Returns the next d coordinates of the current point in p and advances the current coordinate index by d.
double	nextDouble() Returns a (pseudo)random number from the uniform distribution over the interval (0, 1), using this stream, after advancing its state by one step.
int	nextPoint(double[] p, int dim) Returns the first d coordinates of the current point in p, advances to the next point, and returns the index of the new current point.
void	resetCurCoordIndex() Equivalent to setCurCoordIndex (0).
void	resetCurCycle(int index)
void	resetCurPointIndex() Equivalent to setCurPointIndex (0).
int	resetToNextPoint() Increases the current point index by 1 and returns its new value.
void	setCurCoordIndex(int i) Sets the current coordinate index to j, so that the next calls to nextCoordinate or nextCoordinates will return the values ui, j, ui, j+1,..., where i is the index of the current point.
void	setCurPointIndex(int i) Resets the current point index to i and the current coordinate index to zero.

Methods inherited from class java.lang.Object

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

Methods inherited from interface umontreal.iro.lecuyer.rng.RandomStream

toString

Constructor Detail

CycleBasedPointSet.CycleBasedPointSetIterator

public CycleBasedPointSet.CycleBasedPointSetIterator()

Method Detail

resetCurCycle

public void resetCurCycle(int index)

setCurCoordIndex

public void setCurCoordIndex(int i)

Description copied from interface: PointSetIterator

Sets the current coordinate index to j, so that the next calls to nextCoordinate or nextCoordinates will return the values u_{i, j}, u_{i, j+1},..., where i is the index of the current point.

Specified by:

setCurCoordIndex in interface PointSetIterator

Parameters:

i - index of the new current coordinate

resetCurCoordIndex

public void resetCurCoordIndex()

Description copied from interface: PointSetIterator

Equivalent to setCurCoordIndex (0).

Specified by:

resetCurCoordIndex in interface PointSetIterator

hasNextCoordinate

public boolean hasNextCoordinate()

Description copied from interface: PointSetIterator

Returns true if the current point has another coordinate. This can be useful for testing if coordinates are still available.

Specified by:

hasNextCoordinate in interface PointSetIterator

Returns:

true if the current point has another coordinate

nextDouble

public double nextDouble()

Description copied from interface: RandomStream

Returns a (pseudo)random number from the uniform distribution over the interval (0, 1), using this stream, after advancing its state by one step. The generators programmed in SSJ never return the values 0 or 1.

Specified by:

nextDouble in interface RandomStream

Returns:

the next generated uniform

nextCoordinate

public double nextCoordinate()

Description copied from interface: PointSetIterator

Returns the current coordinate u_{i, j} and advances to the next one. If no current coordinate is available (either because the current point index has reached the number of points or because the current coordinate index has reached the number of dimensions), it throws a NoSuchElementException.

Specified by:

nextCoordinate in interface PointSetIterator

Returns:

value of the current coordinate

nextCoordinates

public void nextCoordinates(double[] p,
                   int dim)

Description copied from interface: PointSetIterator

Returns the next d coordinates of the current point in p and advances the current coordinate index by d. If the remaining number of coordinates is too small, a NoSuchElementException is thrown, as in nextCoordinate.

Specified by:

nextCoordinates in interface PointSetIterator

Parameters:

p - array to be filled with the coordinates, starting at index 0

dim - number of coordinates to get

setCurPointIndex

public void setCurPointIndex(int i)

Description copied from interface: PointSetIterator

Resets the current point index to i and the current coordinate index to zero. If i is larger or equal to the number of points, an exception will not be raised here, but only later if we ask for a new coordinate or point.

Specified by:

setCurPointIndex in interface PointSetIterator

Parameters:

i - new index of the current point

resetCurPointIndex

public void resetCurPointIndex()

Description copied from interface: PointSetIterator

Equivalent to setCurPointIndex (0).

Specified by:

resetCurPointIndex in interface PointSetIterator

resetToNextPoint

public int resetToNextPoint()

Description copied from interface: PointSetIterator

Increases the current point index by 1 and returns its new value. If there is no more point, an exception will be raised only if we ask for a new coordinate or point later on.

Specified by:

resetToNextPoint in interface PointSetIterator

Returns:

index of the new current point

nextPoint

public int nextPoint(double[] p,
            int dim)

Description copied from interface: PointSetIterator

Returns the first d coordinates of the current point in p, advances to the next point, and returns the index of the new current point. Even if the current coordinate index is 0, the point returned starts from coordinate 0. After obtaining the last point via this method, the current point index (returned by the method) is equal to the number of points, so it is no longer a valid point index. An exception will then be raised if we attempt to generate additional points or coordinates.

Specialized implementations of this method often allow for increased efficiency, e.g., for cycle-based point sets where the cycles (but not the points) are stored explicitly or for digital nets by allowing non-incremental point enumerations via Gray-code counters.

Specified by:

nextPoint in interface PointSetIterator

Parameters:

p - array to be filled with the coordinates, starting from array index 0

dim - number of coordinates to return

Returns:

index of the new current point

formatState

public java.lang.String formatState()