java.lang.Object
- io.github.mmm.event.AbstractEventSource<E,L>

Type Parameters:

E - the type of the events to send.

L - the type of the listeners.

All Implemented Interfaces:

EventSource<E,L>

Direct Known Subclasses:

AbstractObservableValue, AbstractUiNavigationManager
```
public abstract class AbstractEventSource<E,L extends EventListener<?>>
extends Object
implements EventSource<E,L>
```
Implementation of EventSource.

Since:

1.0.0

Constructor Summary

Constructors
Constructor Description

AbstractEventSource()
The constructor.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`addListener(L listener, boolean weak)`	Adds an `EventListener` which will be notified whenever the an event occurs (something changes).
`protected void`	`fireEvent(E event)`
`protected EventSourceAdapter<E,L>`	`getEventAdapter()`
`protected boolean`	`hasListeners()`
`boolean`	`removeListener(L listener)`	This method removes an `EventListener`.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface io.github.mmm.event.EventSource
addListener, addWeakListener

- Constructor Detail
  - AbstractEventSource
```
public AbstractEventSource()
```
    The constructor.
- Method Detail
  - addListener
```
public void addListener(L listener,
                        boolean weak)
```
    Description copied from interface: EventSource
    
    Adds an EventListener which will be notified whenever the an event occurs (something changes). If the same listener is added more than once, it will be notified more than once. The same EventListener instance may be registered for different EventSources.
    
    Specified by:
    
    addListener in interface EventSource<E,L extends EventListener<?>>
    
    Parameters:
    
    listener - the EventListener to register.
    
    weak - - true if the EventListener may be garbage collected without being removed via a WeakReference, false otherwise (if the listener will be associated using a strong reference). When providing true here (use WeakReference), you need to store a reference to your registered EventListener yourself in the owning parent object so it is not garbage-collected too early.
    
    See Also:
    
    EventSource.addWeakListener(EventListener)
  - removeListener
```
public boolean removeListener(L listener)
```
    Description copied from interface: EventSource
    
    This method removes an EventListener. If the EventListener was not registered before this method does not do any change. Otherwise the first matching EventListener will be removed. So if you added an EventListener multiple times, only the first occurrence will be removed.
    For performance reasons EventListener.isMatchedUsingEquals() returns false by default. To force the usage of equals instead, ensure your EventListener implementation overrides Object.equals(Object) and EventListener.isMatchedUsingEquals() returning true.
    
    Specified by:
    
    removeListener in interface EventSource<E,L extends EventListener<?>>
    
    Parameters:
    
    listener - is the EventListener to unregister.
    
    Returns:
    
    true if the given listener has successfully been removed, false if the listener was NOT registered.
  - hasListeners
```
protected boolean hasListeners()
```
    Returns:
    
    true if at least one EventListener is registered, false otherwise.
  - getEventAdapter
```
protected EventSourceAdapter<E,L> getEventAdapter()
```
    Returns:
    
    the EventSourceAdapter.
  - fireEvent
```
protected void fireEvent(E event)
```
    Parameters:
    
    event - the event to send to all registered EventListeners.

Class AbstractEventSource<E,​L extends EventListener<?>>

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from interface io.github.mmm.event.EventSource

Constructor Detail

AbstractEventSource

Method Detail

addListener

removeListener

hasListeners

getEventAdapter

fireEvent

Class AbstractEventSource<E,L extends EventListener<?>>