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 */
017package org.apache.xbean.spring.context.impl;
018
019/**
020 * A helper class for turning namespaces into META-INF/services URIs
021 * 
022 * @version $Revision: 1.1 $
023 */
024public class NamespaceHelper {
025    public static final String META_INF_PREFIX = "META-INF/services/org/apache/xbean/spring/";
026    public static final String OLD_META_INF_PREFIX = "META-INF/services/org/xbean/spring/";
027
028    /**
029     * Converts the namespace and localName into a valid path name we can use on
030     * the classpath to discover a text file
031     */
032    public static String createDiscoveryPathName(String uri, String localName) {
033        if (isEmpty(uri)) {
034            return localName;
035        }
036        return createDiscoveryPathName(uri) + "/" + localName;
037    }
038
039    /**
040     * Converts the namespace and localName into a valid path name we can use on
041     * the classpath to discover a text file
042     */
043    public static String createDiscoveryPathName(String uri) {
044        // TODO proper encoding required
045        // lets replace any dodgy characters
046        return META_INF_PREFIX + uri.replaceAll("://", "/").replace(':', '/').replace(' ', '_');
047    }
048
049    /**
050     * Creates the old URI for backwards compatibility
051     */
052    public static String createDiscoveryOldPathName(String uri) {
053        // TODO proper encoding required
054        // lets replace any dodgy characters
055        return OLD_META_INF_PREFIX + uri.replaceAll("://", "/").replace(':', '/').replace(' ', '_');
056    }
057
058    public static boolean isEmpty(String uri) {
059        return uri == null || uri.length() == 0;
060    }
061
062}