| 1 | /* gnuStringIntMapper.java -- |
| 2 | Copyright (C) 2005 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GNU Classpath. |
| 5 | |
| 6 | GNU Classpath is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 2, or (at your option) |
| 9 | any later version. |
| 10 | |
| 11 | GNU Classpath is distributed in the hope that it will be useful, but |
| 12 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with GNU Classpath; see the file COPYING. If not, write to the |
| 18 | Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 19 | 02110-1301 USA. |
| 20 | |
| 21 | Linking this library statically or dynamically with other modules is |
| 22 | making a combined work based on this library. Thus, the terms and |
| 23 | conditions of the GNU General Public License cover the whole |
| 24 | combination. |
| 25 | |
| 26 | As a special exception, the copyright holders of this library give you |
| 27 | permission to link this library with independent modules to produce an |
| 28 | executable, regardless of the license terms of these independent |
| 29 | modules, and to copy and distribute the resulting executable under |
| 30 | terms of your choice, provided that you also meet, for each linked |
| 31 | independent module, the terms and conditions of the license of that |
| 32 | module. An independent module is a module which is not derived from |
| 33 | or based on this library. If you modify this library, you may extend |
| 34 | this exception to your version of the library, but you are not |
| 35 | obligated to do so. If you do not wish to do so, delete this |
| 36 | exception statement from your version. */ |
| 37 | |
| 38 | |
| 39 | package gnu.javax.swing.text.html.parser.support; |
| 40 | |
| 41 | import java.util.HashMap; |
| 42 | import java.util.Map; |
| 43 | import java.util.TreeMap; |
| 44 | |
| 45 | /** |
| 46 | * A helper class, mapping between the strings and they unique integer |
| 47 | * identifiers. |
| 48 | * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org) |
| 49 | */ |
| 50 | public abstract class gnuStringIntMapper |
| 51 | { |
| 52 | /** |
| 53 | * Maps argument integer values from DTDConstants into they string |
| 54 | * names. Initialized on demand. |
| 55 | */ |
| 56 | private Map is_Map; |
| 57 | |
| 58 | /** |
| 59 | * Maps argument string names into they integer values from DTDConstants. |
| 60 | * Initialized on demand. |
| 61 | */ |
| 62 | private Map si_Map; |
| 63 | |
| 64 | /** |
| 65 | * Get string from id or null if no such id is present in the mapper. |
| 66 | */ |
| 67 | public final String get(int id) |
| 68 | { |
| 69 | if (is_Map == null) |
| 70 | createTheMap(); |
| 71 | |
| 72 | return (String) is_Map.get(new Integer(id)); |
| 73 | } |
| 74 | |
| 75 | /** Get id from string or 0 if no such string is present in the mapper. */ |
| 76 | public final int get(String id) |
| 77 | { |
| 78 | if (si_Map == null) |
| 79 | createTheMap(); |
| 80 | |
| 81 | Integer i = (Integer) si_Map.get(id); |
| 82 | |
| 83 | return i != null ? i.intValue() : 0; |
| 84 | } |
| 85 | |
| 86 | /** |
| 87 | * Create the mapping table for this mapper by adding the required |
| 88 | * String/int pairs. The method is invoked |
| 89 | * only once for each instance, after the first invocation of the any |
| 90 | * form of the <code>get</code> method. Use <code>add</code> to |
| 91 | * create a map for a concrete instance. |
| 92 | */ |
| 93 | protected abstract void create(); |
| 94 | |
| 95 | /** |
| 96 | * Add an id/string pair to this mapper. This is called from |
| 97 | * the method <code>create</code> only. |
| 98 | */ |
| 99 | protected void add(String name, int id) |
| 100 | { |
| 101 | Integer i = new Integer(id); |
| 102 | si_Map.put(name, i); |
| 103 | is_Map.put(i, name); |
| 104 | } |
| 105 | |
| 106 | private void createTheMap() |
| 107 | { |
| 108 | is_Map = new HashMap(); |
| 109 | si_Map = new TreeMap(); |
| 110 | create(); |
| 111 | } |
| 112 | } |