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## org.apache.fop.events
Class DefaultEventBroadcaster

    java.lang.Object
      org.apache.fop.events.DefaultEventBroadcaster

All Implemented Interfaces:
  EventBroadcaster

public class DefaultEventBroadcaster
extends java.lang.Object
implements EventBroadcaster

Default implementation of the EventBroadcaster interface. It holds a list of event listeners and can provide `EventProducer` instances for type-safe event production.

Field Summary
`protected CompositeEventListener` | `listeners` Holds all registered event listeners

Constructor Summary
`DefaultEventBroadcaster()`

Method Summary
`void` | `addEventListener(EventListener listener)` Adds an event listener to the broadcaster. It is appended to the list of previously registered listeners (the order of registration defines the calling order).
`static void` | `addEventModel(EventModel eventModel)` Adds a new `EventModel` to the list of registered event models.
`void` | `broadcastEvent(Event event)` Broadcasts an event. This method is usually called from within the observed component.
`protected EventProducer` | `createProxyFor(java.lang.Class clazz)` Creates a dynamic proxy for the given EventProducer interface that will handle the conversion of the method call into the broadcasting of an event instance.
`EventProducer` | `getEventProducerFor(java.lang.Class clazz)` Returns an event producer instance for the given interface class.
`boolean` | `hasEventListeners()` Indicates whether any listeners have been registered with the broadcaster.
`void` | `removeEventListener(EventListener listener)` Removes an event listener from the broadcaster. If the event listener is not registered, nothing happens.

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

Field Detail

### listeners

    protected CompositeEventListener listeners

  Holds all registered event listeners

Constructor Detail

### DefaultEventBroadcaster

    public DefaultEventBroadcaster()

Method Detail

### addEventListener

    public void addEventListener(EventListener listener)

  Adds an event listener to the broadcaster. It is appended to the list of previously registered listeners (the order of registration defines the calling order).

  Specified by:
    `addEventListener` in interface `EventBroadcaster`
  Parameters:
    `listener` - the listener to be added

### removeEventListener

    public void removeEventListener(EventListener listener)

  Removes an event listener from the broadcaster. If the event listener is not registered, nothing happens.

  Specified by:
    `removeEventListener` in interface `EventBroadcaster`
  Parameters:
    `listener` - the listener to be removed

### hasEventListeners

    public boolean hasEventListeners()

  Indicates whether any listeners have been registered with the broadcaster.

  Specified by:
    `hasEventListeners` in interface `EventBroadcaster`
  Returns:
    true if listeners are present, false otherwise

### broadcastEvent

    public void broadcastEvent(Event event)

  Broadcasts an event. This method is usually called from within the observed component.

  Specified by:
    `broadcastEvent` in interface `EventBroadcaster`
  Parameters:
    `event` - the event to be broadcast

### addEventModel

    public static void addEventModel(EventModel eventModel)

  Adds a new `EventModel` to the list of registered event models.

  Parameters:
    `eventModel` - the event model instance

### getEventProducerFor

    public EventProducer getEventProducerFor(java.lang.Class clazz)

  Returns an event producer instance for the given interface class.

  Specified by:
    `getEventProducerFor` in interface `EventBroadcaster`
  Parameters:
    `clazz` - the Class object identifying an `EventProducer` interface
  Returns:
    the event producer instance

### createProxyFor

    protected EventProducer createProxyFor(java.lang.Class clazz)

  Creates a dynamic proxy for the given EventProducer interface that will handle the conversion of the method call into the broadcasting of an event instance.

  Parameters:
    `clazz` - a descendant interface of EventProducer
  Returns:
    the EventProducer instance

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