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.blueprint.context.impl; 018 019 /** 020 * A helper class for turning namespaces into META-INF/services URIs 021 * 022 * @version $Revision: 896187 $ 023 */ 024 public class NamespaceHelper { 025 public static final String META_INF_PREFIX = "META-INF/services/org/apache/xbean/blueprint/"; 026 027 /** 028 * Converts the namespace and localName into a valid path name we can use on 029 * the classpath to discover a text file 030 */ 031 public static String createDiscoveryPathName(String uri, String localName) { 032 if (isEmpty(uri)) { 033 return localName; 034 } 035 return createDiscoveryPathName(uri) + "/" + localName; 036 } 037 038 /** 039 * Converts the namespace and localName into a valid path name we can use on 040 * the classpath to discover a text file 041 */ 042 public static String createDiscoveryPathName(String uri) { 043 // TODO proper encoding required 044 // lets replace any dodgy characters 045 return META_INF_PREFIX + uri.replaceAll("://", "/").replace(':', '/').replace(' ', '_'); 046 } 047 048 public static boolean isEmpty(String uri) { 049 return uri == null || uri.length() == 0; 050 } 051 052 }