Package org.osgi.application

Class ApplicationServiceEvent

java.lang.Object

java.util.EventObject

org.osgi.framework.ServiceEvent

org.osgi.application.ApplicationServiceEvent

All Implemented Interfaces:

Serializable

public class ApplicationServiceEvent
extends org.osgi.framework.ServiceEvent

An event from the Framework describing a service lifecycle change.

ApplicationServiceEvent objects are delivered to a ApplicationServiceListener objects when a change occurs in this service's lifecycle. The delivery of an ApplicationServiceEvent is always triggered by a ServiceEvent. ApplicationServiceEvent extends the content of ServiceEvent with the service object the event is referring to as applications has no means to find the corresponding service object for a ServiceReference. A type code is used to identify the event type for future extendability. The available type codes are defined in ServiceEvent.

OSGi Alliance reserves the right to extend the set of types.

See Also:

• ServiceEvent
• ApplicationServiceListener
• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
private static final long	serialVersionUID
(package private) final Object	serviceObject

Fields inherited from class org.osgi.framework.ServiceEvent

MODIFIED, MODIFIED_ENDMATCH, REGISTERED, UNREGISTERING

Fields inherited from class java.util.EventObject

source

Constructor Summary

Constructors

Constructor	Description
ApplicationServiceEvent(int type, org.osgi.framework.ServiceReference reference, Object serviceObject)	Creates a new application service event object.

Method Summary

Modifier and Type	Method	Description
Object	getServiceObject()	This method returns the service object of this service bound to the listener application instance.

Methods inherited from class org.osgi.framework.ServiceEvent

getServiceReference, getType

Methods inherited from class java.util.EventObject

getSource, toString

Methods inherited from class java.lang.Object

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

Field Details

serialVersionUID

private static final long serialVersionUID

See Also:

• Constant Field Values

serviceObject

final Object serviceObject

Constructor Details

ApplicationServiceEvent

public ApplicationServiceEvent(int type,
 org.osgi.framework.ServiceReference reference,
 Object serviceObject)

Creates a new application service event object.

Parameters:

type - The event type. Available type codes are defines in ServiceEvent

reference - A ServiceReference object to the service that had a lifecycle change. This reference will be used as the source in the EventObject base class, therefore, it must not be null.

serviceObject - The service object bound to this application instance. It can be null if this application is not bound to this service yet.

Throws:

IllegalArgumentException - if the specified reference is null.

Method Details

getServiceObject

public Object getServiceObject()

This method returns the service object of this service bound to the listener application instance. A service object becomes bound to the application when it first obtains a service object reference to that service by calling the ApplicationContext.locateService or locateServices methods. If the application is not bound to the service yet, this method returns null.

Returns:

the service object bound to the listener application or null if it isn't bound to this service yet.