public void StopOverAt(ILocation location)
{
if (null == location)
{
throw new ArgumentNullException("location");
}
// Thread safe, lock free sincronization
VoyageState stateBeforeTransition;
VoyageState previousState = CurrentState;
do
{
stateBeforeTransition = previousState;
VoyageState newValue = stateBeforeTransition.StopOverAt(location);
previousState = Interlocked.CompareExchange <VoyageState>(ref this.CurrentState, newValue, stateBeforeTransition);
}while (previousState != stateBeforeTransition);
if (!previousState.Equals(this.CurrentState))
{
VoyageEventArgs args = new VoyageEventArgs(previousState.LastKnownLocation, previousState.NextExpectedLocation);
EventHandler <VoyageEventArgs> handler = Stopped;
if (null != handler)
{
handler(this, args);
}
}
}
public void DepartFrom(ILocation location)
{
if (null == location)
{
throw new ArgumentNullException("location");
}
VoyageState stateBeforeTransition;
VoyageState previousState = CurrentState;
do
{
stateBeforeTransition = previousState;
VoyageState newValue = stateBeforeTransition.DepartFrom(location);
previousState = Interlocked.CompareExchange <VoyageState>(ref this.CurrentState, newValue, stateBeforeTransition);
}while (previousState != stateBeforeTransition);
if (!previousState.Equals(this.CurrentState))
{
VoyageEventArgs args = new VoyageEventArgs(CurrentState.LastKnownLocation, CurrentState.NextExpectedLocation);
EventHandler <VoyageEventArgs> handler = Departed;
if (null != handler)
{
handler(this, args);
}
}
}
protected Voyage(VoyageState initialState)
{
if (null == initialState)
{
throw new ArgumentNullException("initialState");
}
CurrentState = initialState;
}
public override bool Equals(VoyageState other)
{
if (object.ReferenceEquals(this, other))
{
return(true);
}
CompletedVoyage voyage = other as CompletedVoyage;
if (null == voyage)
{
return(false);
}
return(Number.Equals(voyage.Number) && Schedule.Equals(voyage.Schedule));
}
public override bool Equals(VoyageState other)
{
if (object.ReferenceEquals(this, other))
{
return(true);
}
StoppedVoyage voyage = other as StoppedVoyage;
if (null == voyage)
{
return(false);
}
return(Number.Equals(voyage.Number) &&
_movementIndex == voyage._movementIndex &&
Schedule.Equals(voyage.Schedule));
}
