001    /**
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements.  See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License.  You may obtain a copy of the License at
008     *
009     *      http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    package org.apache.xbean.server.repository;
018    
019    import java.net.URL;
020    
021    /**
022     * Repository is used to locate resources by id.
023     *
024     * @author Dain Sundstrom
025     * @version $Id$
026     * @since 2.0
027     */
028    public interface Repository {
029        /**
030         * Gets a URL to the specified resource.
031         * @param id the id of the resource
032         * @return the location of the resource or null if the repository does not contain the resource
033         */
034        URL getResource(String id);
035    }