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.commons.transaction.file;
018
019import java.io.UnsupportedEncodingException;
020import java.net.URLEncoder;
021
022import org.apache.commons.codec.binary.Base64;
023
024/**
025 * URL encodes a resource.
026 *
027 * @version $Id: URLEncodeIdMapper.java 493628 2007-01-07 01:42:48Z joerg $
028 * @since 1.1
029 */
030public class URLEncodeIdMapper implements ResourceIdToPathMapper {
031    public String getPathForId(Object resourceId) {
032        String path = resourceId.toString();
033        try {
034            // XXX weired replacement for the fine JDK1.4 URLEncoder.encode(path, "UTF-8") 
035            // method 
036            // using this combination as a simple URLEncoder.encode without
037            // charset may fail depending on local settings
038            // for this reason the string will be encoded into base64 consisting
039            // of ascii characters only
040            // a further URL encoding is need as base64 might contain '/' which
041            // might be a problem for some file systems 
042            path = new String(Base64.encodeBase64(path.getBytes("UTF-8")), "ASCII");
043            path = URLEncoder.encode(path);
044        } catch (UnsupportedEncodingException e) {
045            // we know this will not happen
046        }
047        return path;
048    }
049}