Module javafx.base

Package javafx.event

Class EventType<T extends Event>

java.lang.Object

javafx.event.EventType<T>

Type Parameters:

T - the event class to which this type applies

All Implemented Interfaces:

Serializable

public final class EventType<T extends Event>
extends Object
implements Serializable

This class represents a specific event type associated with an Event.

Event types form a hierarchy with the ROOT (equals to Event.ANY) as its root. This is useful in event filter / handler registration where a single event filter / handler can be registered to a super event type and will be receiving its sub type events as well. Note that you cannot construct two different EventType objects with the same name and parent.

Note about deserialization: All EventTypes that are going to be deserialized (e.g. as part of Event deserialization), need to exist at the time of deserialization. Deserialization of EventType will not create new EventType objects.

Since:

JavaFX 2.0

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static final EventType<Event>	ROOT	The root event type.

Constructor Summary

Constructors

Constructor	Description
EventType()	Deprecated. Do not use this constructor, as only one such EventType can exist
EventType(String name)	Constructs a new EventType with the specified name and the EventType.ROOT as its super type.
EventType(EventType<? super T> superType)	Constructs a new EventType with the specified super type and the name set to null.
EventType(EventType<? super T> superType, String name)	Constructs a new EventType with the specified super type and name.

Method Summary

Modifier and Type	Method	Description
final String	getName()	Gets the name of this event type.
final EventType<? super T>	getSuperType()	Gets the super type of this event type.
String	toString()	Returns a string representation of this EventType object.

Methods declared in class java.lang.Object

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

Field Details

ROOT

public static final EventType<Event> ROOT

The root event type. All other event types are either direct or indirect sub types of it. It is also the only event type which has its super event type set to null.

Constructor Details

EventType

@Deprecated
public EventType()

Deprecated.

Do not use this constructor, as only one such EventType can exist

Constructs a new EventType with the EventType.ROOT as its super type and the name set to null.

EventType

public EventType(String name)

Constructs a new EventType with the specified name and the EventType.ROOT as its super type.

Parameters:

name - the name

Throws:

IllegalArgumentException - if an EventType with the same name and ROOT/Event.ANY as parent

EventType

public EventType(EventType<? super T> superType)

Constructs a new EventType with the specified super type and the name set to null.

Parameters:

superType - the event super type

Throws:

IllegalArgumentException - if an EventType with "null" name and under this supertype exists

EventType

public EventType(EventType<? super T> superType,
 String name)

Constructs a new EventType with the specified super type and name.

Parameters:

superType - the event super type

name - the name

Throws:

IllegalArgumentException - if an EventType with the same name and superType exists

Method Details

getSuperType

public final EventType<? super T> getSuperType()

Gets the super type of this event type. The returned value is null only for the EventType.ROOT.

Returns:

the super type

getName

public final String getName()

Gets the name of this event type.

Returns:

the name

toString

public String toString()

Returns a string representation of this EventType object.

Overrides:

toString in class Object

Returns:

a string representation of this EventType object.