oracle.ide
Class IdeSubject

java.lang.Object
  oracle.ide.IdeSubject

All Implemented Interfaces:

Subject

Direct Known Subclasses:

ConnectionNode, DefaultLibraryList, IdeVetoableSubject

public class IdeSubject

extends java.lang.Object

implements Subject

The IdeSubject class defines the API to register Observers that are interested in receiving notifications of Subject changes. Classes that can have multiple views in particular must implement the Subject interface so that all observing views can be notified when changes have occurred.

See Also:

Observer, UpdateMessage

Field Summary

Fields inherited from interface oracle.ide.addin.Subject

OBJECT_MODIFIED

Constructor Summary

IdeSubject()
Contructor

IdeSubject(IdeSubject ideSubject)
Copy constructor

Method Summary

void	attach(Observer observer) Registers an Observer interested in being notified when the internal state of the class implementing the Subject interface changes.
protected static void	copy(IdeSubject src, IdeSubject dst) Copies the observer list from src to the Observer list in dst.
void	detach(Observer observer) Unregisters an observer that is not interested anymore in being notified when the internal state of the class implementing the Subject interface changes.
protected java.util.List	getObservers()
void	notifyObservers(java.lang.Object observed, UpdateMessage change) Notifies all observers that the state of the subject has changed.
protected void	setObservers(java.util.List list)

Methods inherited from class java.lang.Object

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

Constructor Detail

IdeSubject

public IdeSubject()

Contructor

IdeSubject

public IdeSubject(IdeSubject ideSubject)

Copy constructor

Method Detail

copy

protected static void copy(IdeSubject src,
                           IdeSubject dst)

Copies the observer list from src to the Observer list in dst. The Observer list in dst is not cleared.

getObservers

protected java.util.List getObservers()

setObservers

protected void setObservers(java.util.List list)

attach

public void attach(Observer observer)

Registers an Observer interested in being notified when the internal state of the class implementing the Subject interface changes. If the observer is already attached this method does nothing.

Specified by:

attach in interface Subject

Parameters:

observer - the Observer interested in change notification messages.

detach

public void detach(Observer observer)

Unregisters an observer that is not interested anymore in being notified when the internal state of the class implementing the Subject interface changes.

Specified by:

detach in interface Subject

Parameters:

observer - the Observer disinterested in change notification messages.

notifyObservers

public void notifyObservers(java.lang.Object observed,
                            UpdateMessage change)

Notifies all observers that the state of the subject has changed.

Specified by:

notifyObservers in interface Subject

Parameters:

change - what changed.

observed - the subject whose state has changed.