org.mbs.services.device.abstractdriver
Class AbstractDeviceActivator

java.lang.Object
  org.mbs.services.device.abstractdriver.AbstractDeviceActivator

All Implemented Interfaces:

org.osgi.framework.BundleActivator

public abstract class AbstractDeviceActivator
extends java.lang.Object
implements org.osgi.framework.BundleActivator

This abstract class should be used to implement bundle activators for all device drivers. The only task of subclasses is to implement the abstract createDrivers method.

Since:

$Date: 2007/08/01 06:50:50 $

Author:

Stoyan Zoubev

Field Summary

protected org.osgi.framework.BundleContext	bc BundleContext instance passed to the start method
protected AbstractDeviceDriver[]	drivers AbstractDeviceDriver services, registered in the framework

Constructor Summary

AbstractDeviceActivator()

Method Summary

abstract AbstractDeviceDriver[]	createDrivers() Creates the Driver service instances.
void	start(org.osgi.framework.BundleContext bc) Starts the driver bundle.
void	stop(org.osgi.framework.BundleContext bc) Stops the driver bundle.

Methods inherited from class java.lang.Object

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

Field Detail

bc

protected org.osgi.framework.BundleContext bc

BundleContext instance passed to the start method

drivers

protected AbstractDeviceDriver[] drivers

AbstractDeviceDriver services, registered in the framework

Constructor Detail

AbstractDeviceActivator

public AbstractDeviceActivator()

Method Detail

start

public void start(org.osgi.framework.BundleContext bc)
           throws java.lang.Exception

Starts the driver bundle. Driver services are created and registered as services in the framework.

Specified by:

start in interface org.osgi.framework.BundleActivator

Parameters:

bc - this Bundle's BundleContext object

Throws:

java.lang.Exception - if driver instantiation fails

stop

public void stop(org.osgi.framework.BundleContext bc)

Stops the driver bundle. Unregisters drivers and all devices registered by the drivers.

Specified by:

stop in interface org.osgi.framework.BundleActivator

Parameters:

bc - this Bundle's bundle context object

createDrivers

public abstract AbstractDeviceDriver[] createDrivers()
                                              throws java.lang.Exception

Creates the Driver service instances.

Returns:

a set of Driver services provided by the bundle

Throws:

java.lang.Exception - if the driver cannot be created for some reason