Class ACraneStrategy

java.lang.Object
  |
  +--ACraneStrategy

Direct Known Subclasses:

CenterStrategy, RandomStrategy

public abstract class ACraneStrategy

extends Object

Base class for a strategy of operating the warehouse crane.

Field Summary

protected Crane	crane Crane used to operate on the warehouse.
protected Warehouse	warehouse Warehouse on which this driver operates.

Constructor Summary

ACraneStrategy()

Method Summary

boolean	addOrder(Order anOrder) Places the given order in the warehouse and returns true, or returns false if it could not be placed.
protected void	beginAdd(Order anOrder) Called when the given order is to be added to the warehouse.
protected void	beginRemove(Order anOrder) Called when the given order is to be removed from the warehouse.
protected Point	getAddLocation(Parcel p) Returns a location in the warehouse at which the given parcel should be added.
abstract String	getName() Returns the name of this device driver.
protected Point	getRemoveLocation(Order anOrder) Returns a location in the warehouse from which a parcel in the given order should be removed.
void	installInto(Crane aCrane, Warehouse aWarehouse) Installs this device driver into the given crane operating in the given warehouse.
protected int	orderNumberAt(int aRow, int aColumn) Returns the order number for the parcel stored at the given row and colum coordinates, or -1 if the coordinates represent an empty space.
protected void	parcelAdded(int aRow, int aColumn, Parcel aParcel) Called when the given parcel has successfully been added to the warehouse at the given location.
protected void	parcelPlacedAt(int aRow, int aColumn, int anOrder) Stores the fact that the given row and column coordinates contain a parcel with the given order number.
protected void	parcelRemoved(int aRow, int aColumn, Parcel aParcel) Called when the given parcel has successfully been removed from the warehouse from the given location.
protected void	parcelRemovedFrom(int aRow, int aColumn) Stores the fact that the given row and column coordinates no longer contain a parcel.
void	quit() Causes this device driver to quit operation.
boolean	removeOrder(Order anOrder) Removes the given order from the warehouse and returns true, or returns false if it could not be removed.
void	reset() Resets this device driver.

Methods inherited from class java.lang.Object

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

Field Detail

warehouse

protected Warehouse warehouse

Warehouse on which this driver operates.

crane

protected Crane crane

Crane used to operate on the warehouse.

Constructor Detail

ACraneStrategy

public ACraneStrategy()

Method Detail

installInto

public void installInto(Crane aCrane,
                        Warehouse aWarehouse)

Installs this device driver into the given crane operating in the given warehouse.

Parameters:

aCrane - crane to be operated by this driver

aWarehouse - warehouse in which the given crane operates

reset

public void reset()

Resets this device driver.

quit

public void quit()

Causes this device driver to quit operation.

addOrder

public boolean addOrder(Order anOrder)

Places the given order in the warehouse and returns true, or returns false if it could not be placed.

Parameters:

anOrder - order to place

removeOrder

public boolean removeOrder(Order anOrder)

Removes the given order from the warehouse and returns true, or returns false if it could not be removed.

Parameters:

anOrder - order to remove

parcelPlacedAt

protected void parcelPlacedAt(int aRow,
                              int aColumn,
                              int anOrder)

Stores the fact that the given row and column coordinates contain a parcel with the given order number.

Parameters:

aRow - row in warehouse

aColumn - column in warehouse

anOrder - order number

parcelRemovedFrom

protected void parcelRemovedFrom(int aRow,
                                 int aColumn)

Stores the fact that the given row and column coordinates no longer contain a parcel.

Parameters:

aRow - row in warehouse

aColumn - column in warehouse

orderNumberAt

protected int orderNumberAt(int aRow,
                            int aColumn)

Returns the order number for the parcel stored at the given row and colum coordinates, or -1 if the coordinates represent an empty space.

Parameters:

aRow - row in warehouse

aColumn - column in warehouse

beginAdd

protected void beginAdd(Order anOrder)

Called when the given order is to be added to the warehouse. The work of the algorithm should not be done here. Instead, this method should be used to preprocess data stored pertaining to the warehouse contents. The default implementation does nothing.

Parameters:

anOrder - order to be added

beginRemove

protected void beginRemove(Order anOrder)

Called when the given order is to be removed from the warehouse. The work of the algorithm should not be done here. Instead, this method should be used to preprocess data stored pertaining to the warehouse contents. The default implementation does nothing.

Parameters:

anOrder - order to be removed

getAddLocation

protected Point getAddLocation(Parcel p)

Returns a location in the warehouse at which the given parcel should be added.

Parameters:

p - the parcel to be added

getRemoveLocation

protected Point getRemoveLocation(Order anOrder)

Returns a location in the warehouse from which a parcel in the given order should be removed.

Parameters:

anOrder -

parcelAdded

protected void parcelAdded(int aRow,
                           int aColumn,
                           Parcel aParcel)

Called when the given parcel has successfully been added to the warehouse at the given location.

Parameters:

aRow - row in warehouse

aColumn - column in warehouse

aParcel - parcel that was added

parcelRemoved

protected void parcelRemoved(int aRow,
                             int aColumn,
                             Parcel aParcel)

Called when the given parcel has successfully been removed from the warehouse from the given location.

Parameters:

aRow - row in warehouse

aColumn - column in warehouse

aParcel - parcel that was removed

getName

public abstract String getName()

Returns the name of this device driver.