Package jsl.observers

Interface ObservableIfc

All Known Implementing Classes:

AbstractMovementController, AbstractMover, AbstractRG2DMover, ActionSchedule, Aggregatable, Aggregate, AggregateCounter, AggregateTimeWeightedVariable, Assign, AssignAttributes, AveragePerTimeWeightedVariable, BedWard, ChooseBetweenThreeStations, ChooseBetweenTwoStations, Component, Component.Available, Component.ComponentState, Component.Created, Component.Failed, Component.Operating, Component.Repairing, Component.Unavailable, ComponentAssembly, ComponentStateChangeListener, CompositeEntityReceiver, CompositeEntityReceiver.Exit, ContinuousReviewPolicyrQ, Counter, DataObservable, DataObservableArray, Delay, Delay, DelayStation, DLQTimedUpdateDemo, DriverLicenseBureau, DriverLicenseBureauWithQ, DriverLicenseBureauWithQJ8, DriverLicenseBureauWithResource, DriverLicenseBureauWithResourceSet, DriveThroughPharmacy, DTPFunctionalTest, DTPQueueModel, DTPQueueResourceModelWithFailures, DTPQueueResourceModelWithFailuresAndSchedule, DTPQueueResourcePoolModel, DTPQueueResourcePoolWithQModel, EntityGenerator, EntityProcessGenerator, EntityReceiver, EntityType, Euclidean2DPlane, EuclideanStepBasedMovementController, EventGenerator, EventGeneratorCPP, EventGeneratorDemo, ExampleModelElement, Executive, Executive.EventExecutionProcess, FailureProcess, FastFoodRestaurant, GGCQueuingStation, GGCQueuingStationWithCustST, GreatCircleBasedSpatialModel, HospitalWard, HospitalWard, IPBisectionRootFinder, IPRootFinder, IterativeDataObservable, IterativeProcess, JobGenerator, JobShop, JobType, LevelResponse, LKInventoryModel, LOTR, MachineRepair, MacroCommand, MetropolisHastings1D, MetropolisHastingsMV, MobileResource, Model, ModelElement, ModelElementState, Mover, NHPDriverLicenseBureauWithQ, NHPPEventGenerator, NHPPTimeBtwEventRV, NWayByChanceEntitySender, NWayByChanceQObjectSender, NWayByChanceStationSender, ObservableComponent, OperatingRoom, ProcessCommand, ProcessDescription, Queue, QueueingSystemWithQ, RandomElement, RandomList, RandomMover, RandomVariable, Record, RectangularGridModel, RectangularGridSpatialModel2D, Release, ReleaseResources, Resource, ResourcedActivity, ResourceLocation, ResourcePool, ResourcePoolExample1, ResourcePoolExample2, ResourcePoolExample3, ResourcePoolWithQ, ResourceProvider, ResourceSet, ResourceSingleFailureEvent, ResourceTester, ResourceUnit, ResourceUnitExample1, ResourceUnitExample2, ResourceUnitExample3, ResourceUnitExample4, ResourceUnitExample5, ResponseInterval, ResponseSchedule, ResponseVariable, ResponseVariableAverageObserver, ResponseVariableBatchingElement, RG2DMover, Schedule, SchedulingElement, SchedulingEventExamples, Seize, SeizeResources, Sequence, SharedResource, SimplePoissonProcess, Simulation, Simulation.ReplicationExecutionProcess, SingleFailureEvent, SingleQueueStation, SingleServerStation, SpatialModel, SpatialModelElement, SpatialResource, SQSeize, SQSRWorkStation, SResource, Station, StatisticalBatchingElement, StochasticApproximationRootFinder, TandemQueue, TandemQueue, Terminate, TestEntityPackage.TestReceiver, TestLevelResponse, TestNHPP, TestNHPPPWConstant, TestNHPPPWConstantNonRepeat, TestNHPPPWConstantRepeat, TestNHPPPWLinear, TestNHPPPWLinearNonRepeat, TestNHPPPWLinearRepeat, TestObserverableObserver.Observable, TestResponseVariable, TestTimeWeighted, TieDyeTShirts, TieDyeTShirtsSR, TimeBasedFailure, TimedAction, TimeSharedComputerModel, TimeSharedComputerModel, TimeWeighted, Transporter, TransporterProvider, TransporterSet, TransporterUser, TransporterUserAbstract, TWBatchingElement, TwoWayByChanceEntitySender, TwoWayByChanceQObjectSender, TwoWayByChanceStationSender, UniformCellSelector, UpDownComponent, UpDownComponentV2, Variable, WelchDataFileAnalyzer, WorkStation, WorkStation

public interface ObservableIfc

The Java Observer/Observable implementation has a number of flaws. This class represents an interface for objects that can be observed. Essentially, observable objects promise the basic management of classes that implement the ObserverIfc

Method Summary

Modifier and Type	Method	Description
void	addObserver(ObserverIfc observer)	Allows the adding (attaching) of an observer to the observable
boolean	contains(ObserverIfc observer)	Returns true if the observer is already attached
int	countObservers()	Returns how many observers are currently observing the observable
void	deleteObserver(ObserverIfc observer)	Allows the deletion (removing) of an observer from the observable
void	deleteObservers()	Deletes all the observers from the observable

Method Detail

addObserver

void addObserver(ObserverIfc observer)

Allows the adding (attaching) of an observer to the observable

Parameters:

observer - the observer to attach

deleteObserver

void deleteObserver(ObserverIfc observer)

Allows the deletion (removing) of an observer from the observable

Parameters:

observer - the observer to delete

contains

boolean contains(ObserverIfc observer)

Returns true if the observer is already attached

Parameters:

observer - the observer to check

Returns:

true if attached

deleteObservers

void deleteObservers()

Deletes all the observers from the observable

countObservers

int countObservers()

Returns how many observers are currently observing the observable

Returns:

number of observers