com.google.web.bindery.requestfactory.shared

Class EntityProxyChange<P extends EntityProxy>

java.lang.Object

com.google.web.bindery.event.shared.Event<EntityProxyChange.Handler<P>>

com.google.web.bindery.requestfactory.shared.EntityProxyChange<P>

Type Parameters:

P - the type of the proxy

public class EntityProxyChange<P extends EntityProxy>
extends Event<EntityProxyChange.Handler<P>>

Event posted by a RequestFactory when changes to an entity are detected. Provides a WriteOperation value describing the change, and the EntityProxyId of the entity in question.

EntityProxyChange events are posted with the relevant EntityProxy Class as their source, allowing handlers to register for changes only of the type they care about via registerForProxyType(EventBus, Class, Handler).

See Also:

RequestFactory.initialize(EventBus), RequestFactory.find(EntityProxyId)

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	EntityProxyChange.Handler<P extends EntityProxy> Implemented by methods that handle EntityProxyChange events.

Nested classes/interfaces inherited from class com.google.web.bindery.event.shared.Event

Event.Type<H>

Constructor Summary

Constructors

Constructor and Description
EntityProxyChange(P proxy, WriteOperation writeOperation) Constructs an EntityProxyChange object.

Method Summary

Modifier and Type	Method and Description
protected void	dispatch(EntityProxyChange.Handler<P> handler) Implemented by subclasses to to invoke their handlers in a type safe manner.
Event.Type<EntityProxyChange.Handler<P>>	getAssociatedType() Returns the type associated with this instance.
EntityProxyId<P>	getProxyId() Returns an unpopulated copy of the changed proxy — all properties are undefined except its id.
WriteOperation	getWriteOperation() Returns the WriteOperation associated with this instance.
static <P extends EntityProxy> HandlerRegistration	registerForProxyType(EventBus eventBus, java.lang.Class<P> proxyType, EntityProxyChange.Handler<P> handler) Register a handler for a EntityProxyChange events for a particular proxy class.

Methods inherited from class com.google.web.bindery.event.shared.Event

getSource, setSource, toDebugString, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

EntityProxyChange

public EntityProxyChange(P proxy,
                         WriteOperation writeOperation)

Constructs an EntityProxyChange object.

Parameters:

proxy - an EntityProxy instance of type P

writeOperation - a WriteOperation instance

Method Detail

registerForProxyType

public static <P extends EntityProxy> HandlerRegistration registerForProxyType(EventBus eventBus,
                                                                               java.lang.Class<P> proxyType,
                                                                               EntityProxyChange.Handler<P> handler)

Register a handler for a EntityProxyChange events for a particular proxy class.

Parameters:

eventBus - the EventBus

proxyType - a Class instance of type P

handler - an EntityProxyChange.Handler instance of type P

Returns:

an EntityProxy instance

getAssociatedType

public Event.Type<EntityProxyChange.Handler<P>> getAssociatedType()

Returns the type associated with this instance.

Specified by:

getAssociatedType in class Event<EntityProxyChange.Handler<P extends EntityProxy>>

Returns:

an instance of Type of type Handler<P>

getProxyId

public EntityProxyId<P> getProxyId()

Returns an unpopulated copy of the changed proxy — all properties are undefined except its id.

Returns:

an instance of EntityProxyId<P>

getWriteOperation

public WriteOperation getWriteOperation()

Returns the WriteOperation associated with this instance.

Returns:

a WriteOperation instance

dispatch

protected void dispatch(EntityProxyChange.Handler<P> handler)

Description copied from class: Event

Implemented by subclasses to to invoke their handlers in a type safe manner. Intended to be called by EventBus.fireEvent(Event) or EventBus.fireEventFromSource(Event, Object).

Specified by:

dispatch in class Event<EntityProxyChange.Handler<P extends EntityProxy>>

Parameters:

handler - handler

See Also:

EventBus.dispatchEvent(Event, Object)