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.activemq.util;
018    
019    import java.util.ArrayList;
020    import java.util.List;
021    import java.util.StringTokenizer;
022    
023    /**
024     * Class for converting to/from String[] to be used instead of a
025     * {@link java.beans.PropertyEditor} which otherwise causes
026     * memory leaks as the JDK {@link java.beans.PropertyEditorManager}
027     * is a static class and has strong references to classes, causing
028     * problems in hot-deployment environments.
029     */
030    public class StringArrayConverter {
031    
032        public static String[] convertToStringArray(Object value) {
033            if (value == null) {
034                return null;
035            }
036    
037            String text = value.toString();
038            if (text == null || text.length() == 0) {
039                return null;
040            }
041    
042            StringTokenizer stok = new StringTokenizer(text, ",");
043            final List<String> list = new ArrayList<String>();
044    
045            while (stok.hasMoreTokens()) {
046                list.add(stok.nextToken());
047            }
048    
049            String[] array = list.toArray(new String[list.size()]);
050            return array;
051        }
052    
053        public static String convertToString(String[] value) {
054            if (value == null || value.length == 0) {
055                return null;
056            }
057    
058            StringBuffer result = new StringBuffer(String.valueOf(value[0]));
059            for (int i = 1; i < value.length; i++) {
060                result.append(",").append(value[i]);
061            }
062    
063            return result.toString();
064        }
065    
066    }
067