| /* |
| * Copyright (c) OSGi Alliance (2000, 2013). 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.Dictionary; |
| import java.util.EventObject; |
| |
| /** |
| * An event from the Framework describing a service lifecycle change. |
| * <p> |
| * {@code ServiceEvent} objects are delivered to {@code ServiceListener}s and |
| * {@code AllServiceListener}s when a change occurs in this service'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 ServiceListener |
| * @see AllServiceListener |
| * @author $Id: b27a941cb68e6416825b1b717090a2eb098733f3 $ |
| */ |
| |
| public class ServiceEvent extends EventObject { |
| static final long serialVersionUID = 8792901483909409299L; |
| /** |
| * Reference to the service that had a change occur in its lifecycle. |
| */ |
| private final ServiceReference<?> reference; |
| |
| /** |
| * Type of service lifecycle change. |
| */ |
| private final int type; |
| |
| /** |
| * This service has been registered. |
| * <p> |
| * This event is synchronously delivered <strong>after</strong> the service |
| * has been registered with the Framework. |
| * |
| * @see BundleContext#registerService(String[],Object,Dictionary) |
| */ |
| public final static int REGISTERED = 0x00000001; |
| |
| /** |
| * The properties of a registered service have been modified. |
| * <p> |
| * This event is synchronously delivered <strong>after</strong> the service |
| * properties have been modified. |
| * |
| * @see ServiceRegistration#setProperties(Dictionary) |
| */ |
| public final static int MODIFIED = 0x00000002; |
| |
| /** |
| * This service is in the process of being unregistered. |
| * <p> |
| * This event is synchronously delivered <strong>before</strong> the service |
| * has completed unregistering. |
| * |
| * <p> |
| * If a bundle is using a service that is {@code UNREGISTERING}, the bundle |
| * should release its use of the service when it receives this event. If the |
| * bundle does not release its use of the service when it receives this |
| * event, the Framework will automatically release the bundle's use of the |
| * service while completing the service unregistration operation. |
| * |
| * @see ServiceRegistration#unregister() |
| * @see BundleContext#ungetService(ServiceReference) |
| */ |
| public final static int UNREGISTERING = 0x00000004; |
| |
| /** |
| * The properties of a registered service have been modified and the new |
| * properties no longer match the listener's filter. |
| * <p> |
| * This event is synchronously delivered <strong>after</strong> the service |
| * properties have been modified. This event is only delivered to listeners |
| * which were added with a non-{@code null} filter where the filter matched |
| * the service properties prior to the modification but the filter does not |
| * match the modified service properties. |
| * |
| * @see ServiceRegistration#setProperties(Dictionary) |
| * @since 1.5 |
| */ |
| public final static int MODIFIED_ENDMATCH = 0x00000008; |
| |
| /** |
| * Creates a new service event object. |
| * |
| * @param type The event type. |
| * @param reference A {@code ServiceReference} object to the service that |
| * had a lifecycle change. |
| */ |
| public ServiceEvent(int type, ServiceReference<?> reference) { |
| super(reference); |
| this.reference = reference; |
| this.type = type; |
| } |
| |
| /** |
| * Returns a reference to the service that had a change occur in its |
| * lifecycle. |
| * <p> |
| * This reference is the source of the event. |
| * |
| * @return Reference to the service that had a lifecycle change. |
| */ |
| public ServiceReference<?> getServiceReference() { |
| return reference; |
| } |
| |
| /** |
| * Returns the type of event. The event type values are: |
| * <ul> |
| * <li>{@link #REGISTERED}</li> |
| * <li>{@link #MODIFIED}</li> |
| * <li>{@link #MODIFIED_ENDMATCH}</li> |
| * <li>{@link #UNREGISTERING}</li> |
| * </ul> |
| * |
| * @return Type of service lifecycle change. |
| */ |
| |
| public int getType() { |
| return type; |
| } |
| } |