TSim

Class TSimInterface

java.lang.Object

TSim.TSimInterface

public final class TSimInterface
extends java.lang.Object

The TSimInterface is the intended interface between TSim and the laboration. It handles the extraction of information from TSim and provides methods for manipulating trains, sensors and switches.

Field Summary

Fields

Modifier and Type	Field and Description
static int	SWITCH_LEFT
static int	SWITCH_RIGHT

Method Summary

Modifier and Type	Method and Description
static TSimInterface	getInstance() Returns the single instance (singleton pattern).
SensorEvent	getSensor(int trainId) Blocks the calling thread until the specified train passes a sensor.
static void	init(java.io.InputStream in, java.io.OutputStream out)
void	setDebug(boolean debug) Turns on and off printing of debug info
void	setSpeed(int trainId, int speed) Sets the speed of a train.
void	setSwitch(int xPos, int yPos, int switchDir) Sets the direction of the specified switch.

Methods inherited from class java.lang.Object

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

Field Detail

SWITCH_LEFT

public static final int SWITCH_LEFT

See Also:

Constant Field Values

SWITCH_RIGHT

public static final int SWITCH_RIGHT

See Also:

Constant Field Values

Method Detail

init

public static void init(java.io.InputStream in,
                        java.io.OutputStream out)

getInstance

public static TSimInterface getInstance()

Returns the single instance (singleton pattern). In first call, creates an instance of this class and starts a thread executing its run() method.

setDebug

public void setDebug(boolean debug)

Turns on and off printing of debug info

setSpeed

public void setSpeed(int trainId,
                     int speed)
              throws CommandException

Sets the speed of a train.

Parameters:

trainId - the id of the train to be affected by the command.

speed - the new speed of the train.

Throws:

CommandException - if the supplied id was false (NO_SUCH_TRAIN), if the speed was illegal (ILLEGAL_SPEED) or if the train had crashed.

setSwitch

public void setSwitch(int xPos,
                      int yPos,
                      int switchDir)
               throws CommandException

Sets the direction of the specified switch. Valid directions are SWITCH_LEFT and SWITCH_RIGHT.

Parameters:

xPos - the x coordinate of the switch.

yPos - the y coordinate of the switch.

switchDir - the new direction of the switch.

Throws:

CommandException - if the coordinates of the switch were invalid (NO_SUCH_SWITCH) or if there was a train on the switch (TRAIN_ON_SWITCH)

getSensor

public SensorEvent getSensor(int trainId)
                      throws CommandException,
                             java.lang.InterruptedException

Blocks the calling thread until the specified train passes a sensor.

Parameters:

trainId - the id of the train to wait for.

Returns:

a SensorEvent representing the information about the event

Throws:

CommandException - if the train has crashed.

java.lang.InterruptedException