| 1 | package com.mysql.management.util; |
| 2 | |
| 3 | import java.util.Arrays; |
| 4 | import java.util.Collection; |
| 5 | import java.util.Iterator; |
| 6 | import java.util.Map; |
| 7 | |
| 8 | /* |
| 9 | Copyright (C) 2004 MySQL AB |
| 10 | |
| 11 | This program is free software; you can redistribute it and/or modify |
| 12 | it under the terms of the GNU General Public License version 2 as |
| 13 | published by the Free Software Foundation. |
| 14 | |
| 15 | This program is distributed in the hope that it will be useful, |
| 16 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | GNU General Public License for more details. |
| 19 | |
| 20 | You should have received a copy of the GNU General Public License |
| 21 | along with this program; if not, write to the Free Software |
| 22 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 23 | |
| 24 | */ |
| 25 | |
| 26 | /** |
| 27 | * This class is final simply as a hint to the compiler, it may be un-finalized |
| 28 | * safely. |
| 29 | * |
| 30 | * @author Eric Herman <eric@mysql.com> |
| 31 | * @version $Id: Str.java,v 1.11 2005/08/31 01:21:16 eherman Exp $ |
| 32 | */ |
| 33 | public final class ListToString { |
| 34 | private String prefix; |
| 35 | |
| 36 | private String separator; |
| 37 | |
| 38 | private String postfix; |
| 39 | |
| 40 | public ListToString() { |
| 41 | this("[", "][", "]"); |
| 42 | } |
| 43 | |
| 44 | public ListToString(String prefix, String separator, String postfix) { |
| 45 | this.prefix = prefix; |
| 46 | this.separator = separator; |
| 47 | this.postfix = postfix; |
| 48 | } |
| 49 | |
| 50 | /** |
| 51 | * returns the contentents of the collection as a string a collections with |
| 52 | * "a", "b", null, and new Integer(1) would return: {[a][b][null][1]} |
| 53 | */ |
| 54 | public String toString(Object[] objs) { |
| 55 | if (objs == null) { |
| 56 | return String.valueOf(null); |
| 57 | } |
| 58 | return toString(Arrays.asList(objs)); |
| 59 | } |
| 60 | |
| 61 | public String toString(Map map) { |
| 62 | if (map == null) { |
| 63 | return String.valueOf(null); |
| 64 | } |
| 65 | return toString(map.entrySet()); |
| 66 | } |
| 67 | |
| 68 | /** |
| 69 | * returns the contentents of the collection as a string a collections with |
| 70 | * "a", "b", null, and new Integer(1) would return: {[a][b][null][1]} |
| 71 | * |
| 72 | * @param objs |
| 73 | * collection |
| 74 | * @param prefix |
| 75 | * @param separator |
| 76 | * @param postfix |
| 77 | * @return the contentents of the collection as a string |
| 78 | */ |
| 79 | public String toString(Collection objs) { |
| 80 | if (objs == null) { |
| 81 | return String.valueOf(objs); |
| 82 | } |
| 83 | StringBuffer buf = new StringBuffer(prefix); |
| 84 | for (Iterator iter = objs.iterator(); iter.hasNext();) { |
| 85 | buf.append(toString(iter.next())); |
| 86 | if (iter.hasNext()) { |
| 87 | buf.append(separator); |
| 88 | } |
| 89 | } |
| 90 | buf.append(postfix); |
| 91 | return buf.toString(); |
| 92 | } |
| 93 | |
| 94 | public String toString(Object obj) { |
| 95 | if (obj instanceof Object[]) { |
| 96 | return toString((Object[]) obj); |
| 97 | } |
| 98 | if (obj instanceof Collection) { |
| 99 | return toString((Collection) obj); |
| 100 | } |
| 101 | if (obj instanceof Map) { |
| 102 | return toString((Map) obj); |
| 103 | } |
| 104 | if (obj instanceof Map.Entry) { |
| 105 | Map.Entry entry = (Map.Entry) obj; |
| 106 | return entry.getKey() + "=" + toString(entry.getValue()); |
| 107 | } |
| 108 | return String.valueOf(obj); |
| 109 | } |
| 110 | } |