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  * Copyright (c) OSGi Alliance (2008, 2012). 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
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.
package org.osgi.framework.hooks.service;
OSGi Framework Service Event Hook Service.

Bundles registering this service will be called during framework service (register, modify, and unregister service) operations.

As of 1.1. Replaced by EventListenerHook.
$Id: 84757a5f719db4d7671e81a76af2b320404ae0f5 $
public interface EventHook {
Event hook method. This method is called prior to service event delivery when a publishing bundle registers, modifies or unregisters a service. This method can filter the bundles which receive the event.

event The service event to be delivered.
contexts A collection of Bundle Contexts for bundles which have listeners to which the specified event will be delivered. The implementation of this method may remove bundle contexts from the collection to prevent the event from being delivered to the associated bundles. The collection supports all the optional Collection operations except add and addAll. Attempting to add to the collection will result in an UnsupportedOperationException. The collection is not synchronized.
	void event(ServiceEvent eventCollection<BundleContextcontexts);
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