jfreerails.world.track
Class NullTrackPiece

java.lang.Object
  jfreerails.world.track.NullTrackPiece

All Implemented Interfaces:

java.io.Serializable, FreerailsSerializable, TrackPiece

public final class NullTrackPiece
extends java.lang.Object
implements TrackPiece

A track piece that doesn't exist - using this avoids needing to check against null before calling the methods on a track piece.

Author:

lindsal

See Also:

Serialized Form

Field Summary

private static int	NO_OWNER
private static TrackPiece	nullTrackPiece
private static long	serialVersionUID

Constructor Summary

private

NullTrackPiece()

Method Summary

boolean	equals(java.lang.Object o)
static TrackPiece	getInstance()
int	getOwnerID()
TrackConfiguration	getTrackConfiguration()
int	getTrackGraphicID()
TrackRule	getTrackRule()
int	getTrackTypeID()
int	hashCode()
private java.lang.Object	readResolve()

Methods inherited from class java.lang.Object

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

Field Detail

serialVersionUID

private static final long serialVersionUID

See Also:

Constant Field Values

nullTrackPiece

private static final TrackPiece nullTrackPiece

NO_OWNER

private static final int NO_OWNER

See Also:

Constant Field Values

Constructor Detail

NullTrackPiece

private NullTrackPiece()

Method Detail

getInstance

public static TrackPiece getInstance()

getTrackGraphicID

public int getTrackGraphicID()

Specified by:

getTrackGraphicID in interface TrackPiece

getTrackRule

public TrackRule getTrackRule()

Specified by:

getTrackRule in interface TrackPiece

getTrackConfiguration

public TrackConfiguration getTrackConfiguration()

Specified by:

getTrackConfiguration in interface TrackPiece

readResolve

private java.lang.Object readResolve()
                              throws java.io.ObjectStreamException

Throws:

java.io.ObjectStreamException

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

getOwnerID

public int getOwnerID()

Specified by:

getOwnerID in interface TrackPiece

getTrackTypeID

public int getTrackTypeID()

Specified by:

getTrackTypeID in interface TrackPiece