001/*
002 * $Header: /cvshome/build/org.osgi.service.obr/src/org/osgi/service/obr/CapabilityProvider.java,v 1.3 2006/03/16 14:56:17 hargrave Exp $
003 *
004 * Copyright (c) OSGi Alliance (2006). All Rights Reserved.
005 *
006 * Licensed under the Apache License, Version 2.0 (the "License");
007 * you may not use this file except in compliance with the License.
008 * You may obtain a copy of the License at
009 *
010 *      http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018
019// This document is an experimental draft to enable interoperability
020// between bundle repositories. There is currently no commitment to 
021// turn this draft into an official specification.  
022package org.osgi.service.obr;
023
024/**
025 * This service interface allows third parties to provide capabilities that are
026 * present on the system but not encoded in the bundle's manifests. For example,
027 * a capability provider could provide:
028 * <ol>
029 * <li>A Set of certificates</li>
030 * <li>Dimensions of the screen</li>
031 * <li>Amount of memory</li>
032 * <li>...</li>
033 * </ol>
034 * 
035 * @version $Revision: 1.3 $
036 */
037public interface CapabilityProvider
038{
039    /**
040     * Return a set of capabilities.
041     * 
042     * These capabilities are considered part of the platform. Bundles can
043     * require these capabilities during selection. All capabilities from
044     * different providers are considered part of the platform.
045     * 
046     * @return Set of capabilities
047     */
048    Capability[] getCapabilities();
049}