/*
 * Copyright (c) OSGi Alliance (2008, 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.hooks.service;

import java.util.Collection;
import org.osgi.annotation.versioning.ConsumerType;
import org.osgi.framework.BundleContext;
import org.osgi.framework.ServiceReference;

OSGi Framework Service Find Hook Service.

Bundles registering this service will be called during framework service find
(get service references) operations.
Author:
$Id: 4325a49f8c29ac9e7f32e8450db26148bbda5642 $
@ThreadSafe
/**
 * OSGi Framework Service Find Hook Service.
 * 
 * <p>
 * Bundles registering this service will be called during framework service find
 * (get service references) operations.
 * 
 * @ThreadSafe
 * @author $Id: 4325a49f8c29ac9e7f32e8450db26148bbda5642 $
 */
@ConsumerType
public interface FindHook {
	
Find hook method. This method is called during the service find operation (for example, BundleContext.getServiceReferences(String, String) ). This method can filter the result of the find operation. 
Params:
context – The bundle context of the bundle performing the find
       operation.
name – The class name of the services to find or null to find all services.
filter – The filter criteria of the services to find or null for no filter criteria.
allServices – true if the find operation is the result of a call to BundleContext.getAllServiceReferences(String, String)
references – A collection of Service References to be returned as a result of the find operation. The implementation of this method may remove service references from the collection to prevent the references from being returned to the bundle performing the find operation. 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./**
	 * Find hook method. This method is called during the service find operation
	 * (for example, {@link BundleContext#getServiceReferences(String, String)}
	 * ). This method can filter the result of the find operation.
	 * 
	 * @param context The bundle context of the bundle performing the find
	 *        operation.
	 * @param name The class name of the services to find or {@code null} to
	 *        find all services.
	 * @param filter The filter criteria of the services to find or {@code null}
	 *        for no filter criteria.
	 * @param allServices {@code true} if the find operation is the result of a
	 *        call to
	 *        {@link BundleContext#getAllServiceReferences(String, String)}
	 * @param references A collection of Service References to be returned as a
	 *        result of the find operation. The implementation of this method
	 *        may remove service references from the collection to prevent the
	 *        references from being returned to the bundle performing the find
	 *        operation. The collection supports all the optional
	 *        {@code Collection} operations except {@code add} and
	 *        {@code addAll}. Attempting to add to the collection will result in
	 *        an {@code UnsupportedOperationException}. The collection is not
	 *        synchronized.
	 */
	void find(BundleContext context, String name, String filter, boolean allServices, Collection<ServiceReference<?>> references);
}