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Java > Open Source Codes > com > lowagie > text > factories > GreekNumberFactory


1 /*
2  * $Id: GreekNumberFactory.java 2686 2007-04-17 09:09:25Z blowagie $
3  * $Name$
4  *
5  * Copyright 2007 by Bruno Lowagie.
6  *
7  * The contents of this file are subject to the Mozilla Public License Version 1.1
8  * (the "License"); you may not use this file except in compliance with the License.
9  * You may obtain a copy of the License at http://www.mozilla.org/MPL/
10  *
11  * Software distributed under the License is distributed on an "AS IS" basis,
12  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
13  * for the specific language governing rights and limitations under the License.
14  *
15  * The Original Code is 'iText, a free JAVA-PDF library'.
16  *
17  * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
18  * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
19  * All Rights Reserved.
20  * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
21  * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
22  *
23  * Contributor(s): all the names of the contributors are added in the source code
24  * where applicable.
25  *
26  * Alternatively, the contents of this file may be used under the terms of the
27  * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
28  * provisions of LGPL are applicable instead of those above. If you wish to
29  * allow use of your version of this file only under the terms of the LGPL
30  * License and not to allow others to use your version of this file under
31  * the MPL, indicate your decision by deleting the provisions above and
32  * replace them with the notice and other provisions required by the LGPL.
33  * If you do not delete the provisions above, a recipient may use your version
34  * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
35  *
36  * This library is free software; you can redistribute it and/or modify it
37  * under the terms of the MPL as stated above or under the terms of the GNU
38  * Library General Public License as published by the Free Software Foundation;
39  * either version 2 of the License, or any later version.
40  *
41  * This library is distributed in the hope that it will be useful, but WITHOUT
42  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
43  * FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
44  * details.
45  *
46  * If you didn't download this code from the following link, you should check if
47  * you aren't using an obsolete version:
48  * http://www.lowagie.com/iText/
49  */
50 package com.lowagie.text.factories;
51
52 import com.lowagie.text.SpecialSymbol;
53
54 /**
55  * This class can produce String combinations representing a number built with
56  * Greek letters (from alpha to omega, then alpha alpha, alpha beta, alpha gamma).
57  * We are aware of the fact that the original Greek numbering is different;
58  * See http://www.cogsci.indiana.edu/farg/harry/lan/grknum.htm#ancient
59  * but this isn't implemented yet; the main reason being the fact that we
60  * need a font that has the obsolete Greek characters qoppa and sampi.
61  */
62 public class GreekNumberFactory {
63     /**
64      * Changes an int into a lower case Greek letter combination.
65      * @param index the original number
66      * @return the letter combination
67      */
68     public static final String JavaDoc getString(int index) {
69         return getString(index, true);
70     }
71     
72     /**
73      * Changes an int into a lower case Greek letter combination.
74      * @param index the original number
75      * @return the letter combination
76      */
77     public static final String JavaDoc getLowerCaseString(int index) {
78         return getString(index);
79     }
80     
81     /**
82      * Changes an int into a upper case Greek letter combination.
83      * @param index the original number
84      * @return the letter combination
85      */
86     public static final String JavaDoc getUpperCaseString(int index) {
87         return getString(index).toUpperCase();
88     }
89
90     /**
91      * Changes an int into a Greek letter combination.
92      * @param index the original number
93      * @return the letter combination
94      */
95     public static final String JavaDoc getString(int index, boolean lowercase) {
96         if (index < 1) return "";
97         index--;
98             
99         int bytes = 1;
100         int start = 0;
101         int symbols = 24;
102         while(index >= symbols + start) {
103             bytes++;
104             start += symbols;
105             symbols *= 24;
106         }
107               
108         int c = index - start;
109         char[] value = new char[bytes];
110         while(bytes > 0) {
111             bytes--;
112             value[bytes] = (char)(c % 24);
113             if (value[bytes] > 16) value[bytes]++;
114             value[bytes] += (lowercase ? 945 : 913);
115             value[bytes] = SpecialSymbol.getCorrespondingSymbol(value[bytes]);
116             c /= 24;
117         }
118         
119         return String.valueOf(value);
120     }
121     
122     /**
123      * Test this class using this main method.
124      */
125     public static void main(String JavaDoc[] args) {
126         for (int i = 1; i < 1000; i++) {
127             System.out.println(getString(i));
128         }
129     }
130 }
131
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