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/*
* Copyright (c) OSGi Alliance (2000, 2010). All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.osgi.framework;
import java.util.EventObject;
/**
* An event from the Framework describing a bundle lifecycle change.
* <p>
* {@code BundleEvent} objects are delivered to
* {@code SynchronousBundleListener}s and {@code BundleListener}s
* when a change occurs in a bundle's lifecycle. A type code is used to identify
* the event type for future extendability.
*
* <p>
* OSGi Alliance reserves the right to extend the set of types.
*
* @Immutable
* @see BundleListener
* @see SynchronousBundleListener
* @version $Id: ac96d1ab8c5b491539af238ad41071b5bb9aef95 $
*/
public class BundleEvent extends EventObject {
static final long serialVersionUID = 4080640865971756012L;
/**
* Bundle that had a change occur in its lifecycle.
*/
private final Bundle bundle;
/**
* Type of bundle lifecycle change.
*/
private final int type;
/**
* The bundle has been installed.
*
* @see BundleContext#installBundle(String)
*/
public final static int INSTALLED = 0x00000001;
/**
* The bundle has been started.
* <p>
* The bundle's
* {@link BundleActivator#start(BundleContext) BundleActivator start} method
* has been executed if the bundle has a bundle activator class.
*
* @see Bundle#start()
*/
public final static int STARTED = 0x00000002;
/**
* The bundle has been stopped.
* <p>
* The bundle's
* {@link BundleActivator#stop(BundleContext) BundleActivator stop} method
* has been executed if the bundle has a bundle activator class.
*
* @see Bundle#stop()
*/
public final static int STOPPED = 0x00000004;
/**
* The bundle has been updated.
*
* @see Bundle#update()
*/
public final static int UPDATED = 0x00000008;
/**
* The bundle has been uninstalled.
*
* @see Bundle#uninstall
*/
public final static int UNINSTALLED = 0x00000010;
/**
* The bundle has been resolved.
*
* @see Bundle#RESOLVED
* @since 1.3
*/
public final static int RESOLVED = 0x00000020;
/**
* The bundle has been unresolved.
*
* @see Bundle#INSTALLED
* @since 1.3
*/
public final static int UNRESOLVED = 0x00000040;
/**
* The bundle is about to be activated.
* <p>
* The bundle's
* {@link BundleActivator#start(BundleContext) BundleActivator start} method
* is about to be called if the bundle has a bundle activator class. This
* event is only delivered to {@link SynchronousBundleListener}s. It is not
* delivered to {@code BundleListener}s.
*
* @see Bundle#start()
* @since 1.3
*/
public final static int STARTING = 0x00000080;
/**
* The bundle is about to deactivated.
* <p>
* The bundle's
* {@link BundleActivator#stop(BundleContext) BundleActivator stop} method
* is about to be called if the bundle has a bundle activator class. This
* event is only delivered to {@link SynchronousBundleListener}s. It is not
* delivered to {@code BundleListener}s.
*
* @see Bundle#stop()
* @since 1.3
*/
public final static int STOPPING = 0x00000100;
/**
* The bundle will be lazily activated.
* <p>
* The bundle has a {@link Constants#ACTIVATION_LAZY lazy activation policy}
* and is waiting to be activated. It is now in the
* {@link Bundle#STARTING STARTING} state and has a valid
* {@code BundleContext}. This event is only delivered to
* {@link SynchronousBundleListener}s. It is not delivered to
* {@code BundleListener}s.
*
* @since 1.4
*/
public final static int LAZY_ACTIVATION = 0x00000200;
/**
* Creates a bundle event of the specified type.
*
* @param type The event type.
* @param bundle The bundle which had a lifecycle change.
*/
public BundleEvent(int type, Bundle bundle) {
super(bundle);
this.bundle = bundle;
this.type = type;
}
/**
* Returns the bundle which had a lifecycle change. This bundle is the
* source of the event.
*
* @return The bundle that had a change occur in its lifecycle.
*/
public Bundle getBundle() {
return bundle;
}
/**
* Returns the type of lifecyle event. The type values are:
* <ul>
* <li>{@link #INSTALLED}
* <li>{@link #RESOLVED}
* <li>{@link #LAZY_ACTIVATION}
* <li>{@link #STARTING}
* <li>{@link #STARTED}
* <li>{@link #STOPPING}
* <li>{@link #STOPPED}
* <li>{@link #UPDATED}
* <li>{@link #UNRESOLVED}
* <li>{@link #UNINSTALLED}
* </ul>
*
* @return The type of lifecycle event.
*/
public int getType() {
return type;
}
}
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