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.commons.transaction.file;
018    
019    import java.io.UnsupportedEncodingException;
020    import java.net.URLEncoder;
021    
022    import 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     */
030    public 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    }