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


1 /*
2  * $Id: RomanAlphabetFactory.java 2685 2007-04-16 12:09:48Z 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
51 package com.lowagie.text.factories;
52
53 /**
54  * This class can produce String combinations representing a number.
55  * "a" to "z" represent 1 to 26, "AA" represents 27, "AB" represents 28,
56  * and so on; "ZZ" is followed by "AAA".
57  */
58 public class RomanAlphabetFactory {
59
60     /**
61      * Translates a positive integer (not equal to zero)
62      * into a String using the letters 'a' to 'z';
63      * 1 = a, 2 = b, ..., 26 = z, 27 = aa, 28 = ab,...
64      */
65     public static final String JavaDoc getString(int index) {
66         if (index < 1) throw new NumberFormatException JavaDoc(
67                 "You can't translate a negative number into an alphabetical value.");
68         
69         index--;
70         int bytes = 1;
71         int start = 0;
72         int symbols = 26;
73         while(index >= symbols + start) {
74             bytes++;
75             start += symbols;
76             symbols *= 26;
77         }
78               
79         int c = index - start;
80         char[] value = new char[bytes];
81         while(bytes > 0) {
82             value[--bytes] = (char)( 'a' + (c % 26));
83             c /= 26;
84         }
85         
86         return new String JavaDoc(value);
87     }
88     
89     /**
90      * Translates a positive integer (not equal to zero)
91      * into a String using the letters 'a' to 'z';
92      * 1 = a, 2 = b, ..., 26 = z, 27 = aa, 28 = ab,...
93      */
94     public static final String JavaDoc getLowerCaseString(int index) {
95         return getString(index);
96     }
97     
98     /**
99      * Translates a positive integer (not equal to zero)
100      * into a String using the letters 'A' to 'Z';
101      * 1 = A, 2 = B, ..., 26 = Z, 27 = AA, 28 = AB,...
102      */
103     public static final String JavaDoc getUpperCaseString(int index) {
104         return getString(index).toUpperCase();
105     }
106
107     
108     /**
109      * Translates a positive integer (not equal to zero)
110      * into a String using the letters 'a' to 'z'
111      * (a = 1, b = 2, ..., z = 26, aa = 27, ab = 28,...).
112      */
113     public static final String JavaDoc getString(int index, boolean lowercase) {
114         if (lowercase) {
115             return getLowerCaseString(index);
116         }
117         else {
118             return getUpperCaseString(index);
119         }
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 < 32000; i++) {
127             System.out.println(getString(i));
128         }
129     }
130 }
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