| /* |
| * Copyright (c) OSGi Alliance (2001, 2015). 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.service.device; |
| |
| import org.osgi.framework.ServiceReference; |
| |
| /** |
| * When the device manager detects a new Device service, it calls all registered |
| * Driver services to determine if anyone matches the Device service. If at |
| * least one Driver service matches, the device manager must choose one. If |
| * there is a Driver Selector service registered with the Framework, the device |
| * manager will ask it to make the selection. If there is no Driver Selector |
| * service, or if it returns an invalid result, or throws an {@code Exception}, |
| * the device manager uses the default selection strategy. |
| * |
| * @author $Id$ |
| * @since 1.1 |
| * @ThreadSafe |
| */ |
| public interface DriverSelector { |
| /** |
| * Return value from {@code DriverSelector.select}, if no Driver service |
| * should be attached to the Device service. The value is -1. |
| */ |
| public static final int SELECT_NONE = -1; |
| |
| /** |
| * Select one of the matching Driver services. The device manager calls this |
| * method if there is at least one driver bidding for a device. Only Driver |
| * services that have responded with nonzero (not {@link Device#MATCH_NONE}) |
| * {@code } match values will be included in the list. |
| * |
| * @param reference the {@code ServiceReference} object of the Device |
| * service. |
| * @param matches the array of all non-zero matches. |
| * @return index into the array of {@code Match} objects, or |
| * {@code SELECT_NONE} if no Driver service should be attached |
| */ |
| public int select(ServiceReference<?> reference, Match[] matches); |
| } |