movement
Class MovementModel

java.lang.Object
  movement.MovementModel

Direct Known Subclasses:

ExtendedMovementModel, ExternalMovement, MapBasedMovement, RandomWalk, RandomWaypoint, StationaryMovement

public abstract class MovementModel
extends java.lang.Object

Superclass for all movement models. All subclasses must contain at least a constructor with one Settings parameter and also a copy-constructor. They must also implement the replicate() method, which should return an instance of the movement model class with same parameters as the object (immutable fields can be shared, but mutable fields must be copied).

To make a new movement model do something useful, also at least getInitialLocation() and getPath() are worthwhile to override.

Field Summary

static double[]	DEF_SPEEDS default setting for speed distribution
static double[]	DEF_WAIT_TIMES default setting for wait time distribution
protected double	maxSpeed
protected double	maxWaitTime
protected double	minSpeed
protected double	minWaitTime
static java.lang.String	MOVEMENT_MODEL_NS MovementModel namespace (where world size and rng seed settings are looked from ("MovementModel")
protected static java.util.Random	rng common rng for all movement models in the simulation
static java.lang.String	RNG_SEED movement models' rng seed -setting id ("rngSeed")
static java.lang.String	SPEED node's speed CSV (min, max) -setting id ("speed")
static java.lang.String	WAIT_TIME node's wait time CSV (min, max) -setting id ("waitTime")
static java.lang.String	WORLD_SIZE world's size CSV (width, height) -setting id ("worldSize")

Constructor Summary

MovementModel()
Empty constructor for testing purposes.

MovementModel(MovementModel mm)
Copyconstructor.

MovementModel(Settings settings)
Creates a new MovementModel based on a Settings object's settings.

Method Summary

protected double	generateSpeed() Generates and returns a speed value between min and max of the WAIT_TIME setting.
protected double	generateWaitTime() Generates and returns a suitable waiting time at the end of a path.
abstract Coord	getInitialLocation() Returns a new initial placement for a node
int	getMaxX() Returns the largest X coordinate value this model uses
int	getMaxY() Returns the largest Y coordinate value this model uses
abstract Path	getPath() Returns a new path by this movement model or null if no new path could be constructed at the moment (node should wait where it is).
boolean	isActive() Returns true if this node is active at the moment (false if not)
double	nextPathAvailable() Returns a sim time when the next path is available.
abstract MovementModel	replicate() Creates a replicate of the movement model.
static void	reset() Resets all static fields to default values
java.lang.String	toString() Returns simply the name of the movement model class

Methods inherited from class java.lang.Object

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

Field Detail

SPEED

public static final java.lang.String SPEED

node's speed CSV (min, max) -setting id ("speed")

See Also:

Constant Field Values

WAIT_TIME

public static final java.lang.String WAIT_TIME

node's wait time CSV (min, max) -setting id ("waitTime")

See Also:

Constant Field Values

DEF_SPEEDS

public static final double[] DEF_SPEEDS

default setting for speed distribution

DEF_WAIT_TIMES

public static final double[] DEF_WAIT_TIMES

default setting for wait time distribution

MOVEMENT_MODEL_NS

public static final java.lang.String MOVEMENT_MODEL_NS

MovementModel namespace (where world size and rng seed settings are looked from ("MovementModel")

See Also:

Constant Field Values

WORLD_SIZE

public static final java.lang.String WORLD_SIZE

world's size CSV (width, height) -setting id ("worldSize")

See Also:

Constant Field Values

RNG_SEED

public static final java.lang.String RNG_SEED

movement models' rng seed -setting id ("rngSeed")

See Also:

Constant Field Values

rng

protected static java.util.Random rng

common rng for all movement models in the simulation

minSpeed

protected double minSpeed

maxSpeed

protected double maxSpeed

minWaitTime

protected double minWaitTime

maxWaitTime

protected double maxWaitTime

Constructor Detail

MovementModel

public MovementModel()

Empty constructor for testing purposes.

MovementModel

public MovementModel(Settings settings)

Creates a new MovementModel based on a Settings object's settings.

Parameters:

settings - The Settings object where the settings are read from

MovementModel

public MovementModel(MovementModel mm)

Copyconstructor. Creates a new MovementModel based on the given prototype.

Parameters:

mm - The MovementModel prototype to base the new object to

Method Detail

getMaxX

public int getMaxX()

Returns the largest X coordinate value this model uses

Returns:

Maximum of X coordinate values

getMaxY

public int getMaxY()

Returns the largest Y coordinate value this model uses

Returns:

Maximum of Y coordinate values

generateSpeed

protected double generateSpeed()

Generates and returns a speed value between min and max of the WAIT_TIME setting.

Returns:

A new speed between min and max values

generateWaitTime

protected double generateWaitTime()

Generates and returns a suitable waiting time at the end of a path. (i.e. random variable whose value is between min and max of the WAIT_TIME setting).

Returns:

The time as a double

getPath

public abstract Path getPath()

Returns a new path by this movement model or null if no new path could be constructed at the moment (node should wait where it is). A new path should not be requested before the destination of the previous path has been reached.

Returns:

A new path or null

getInitialLocation

public abstract Coord getInitialLocation()

Returns a new initial placement for a node

Returns:

The initial coordinates for a node

isActive

public boolean isActive()

Returns true if this node is active at the moment (false if not)

Returns:

true if this node is active (false if not)

nextPathAvailable

public double nextPathAvailable()

Returns a sim time when the next path is available. This implementation returns a random time in future that is WAIT_TIME from now.

Returns:

The sim time when node should ask the next time for a path

toString

public java.lang.String toString()

Returns simply the name of the movement model class

Overrides:

toString in class java.lang.Object

Returns:

the name of the movement model class

replicate

public abstract MovementModel replicate()

Creates a replicate of the movement model.

Returns:

A new movement model with the same settings as this model

reset

public static void reset()

Resets all static fields to default values