001: /*
002: * $Id: GreekNumberFactory.java 2686 2007-04-17 09:09:25Z blowagie $
003: * $Name$
004: *
005: * Copyright 2007 by Bruno Lowagie.
006: *
007: * The contents of this file are subject to the Mozilla Public License Version 1.1
008: * (the "License"); you may not use this file except in compliance with the License.
009: * You may obtain a copy of the License at http://www.mozilla.org/MPL/
010: *
011: * Software distributed under the License is distributed on an "AS IS" basis,
012: * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
013: * for the specific language governing rights and limitations under the License.
014: *
015: * The Original Code is 'iText, a free JAVA-PDF library'.
016: *
017: * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
018: * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
019: * All Rights Reserved.
020: * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
021: * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
022: *
023: * Contributor(s): all the names of the contributors are added in the source code
024: * where applicable.
025: *
026: * Alternatively, the contents of this file may be used under the terms of the
027: * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
028: * provisions of LGPL are applicable instead of those above. If you wish to
029: * allow use of your version of this file only under the terms of the LGPL
030: * License and not to allow others to use your version of this file under
031: * the MPL, indicate your decision by deleting the provisions above and
032: * replace them with the notice and other provisions required by the LGPL.
033: * If you do not delete the provisions above, a recipient may use your version
034: * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
035: *
036: * This library is free software; you can redistribute it and/or modify it
037: * under the terms of the MPL as stated above or under the terms of the GNU
038: * Library General Public License as published by the Free Software Foundation;
039: * either version 2 of the License, or any later version.
040: *
041: * This library is distributed in the hope that it will be useful, but WITHOUT
042: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
043: * FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
044: * details.
045: *
046: * If you didn't download this code from the following link, you should check if
047: * you aren't using an obsolete version:
048: * http://www.lowagie.com/iText/
049: */
050: package com.lowagie.text.factories;
051:
052: import com.lowagie.text.SpecialSymbol;
053:
054: /**
055: * This class can produce String combinations representing a number built with
056: * Greek letters (from alpha to omega, then alpha alpha, alpha beta, alpha gamma).
057: * We are aware of the fact that the original Greek numbering is different;
058: * See http://www.cogsci.indiana.edu/farg/harry/lan/grknum.htm#ancient
059: * but this isn't implemented yet; the main reason being the fact that we
060: * need a font that has the obsolete Greek characters qoppa and sampi.
061: */
062: public class GreekNumberFactory {
063: /**
064: * Changes an int into a lower case Greek letter combination.
065: * @param index the original number
066: * @return the letter combination
067: */
068: public static final String getString(int index) {
069: return getString(index, true);
070: }
071:
072: /**
073: * Changes an int into a lower case Greek letter combination.
074: * @param index the original number
075: * @return the letter combination
076: */
077: public static final String getLowerCaseString(int index) {
078: return getString(index);
079: }
080:
081: /**
082: * Changes an int into a upper case Greek letter combination.
083: * @param index the original number
084: * @return the letter combination
085: */
086: public static final String getUpperCaseString(int index) {
087: return getString(index).toUpperCase();
088: }
089:
090: /**
091: * Changes an int into a Greek letter combination.
092: * @param index the original number
093: * @return the letter combination
094: */
095: public static final String getString(int index, boolean lowercase) {
096: if (index < 1)
097: return "";
098: index--;
099:
100: int bytes = 1;
101: int start = 0;
102: int symbols = 24;
103: while (index >= symbols + start) {
104: bytes++;
105: start += symbols;
106: symbols *= 24;
107: }
108:
109: int c = index - start;
110: char[] value = new char[bytes];
111: while (bytes > 0) {
112: bytes--;
113: value[bytes] = (char) (c % 24);
114: if (value[bytes] > 16)
115: value[bytes]++;
116: value[bytes] += (lowercase ? 945 : 913);
117: value[bytes] = SpecialSymbol
118: .getCorrespondingSymbol(value[bytes]);
119: c /= 24;
120: }
121:
122: return String.valueOf(value);
123: }
124:
125: /**
126: * Test this class using this main method.
127: */
128: public static void main(String[] args) {
129: for (int i = 1; i < 1000; i++) {
130: System.out.println(getString(i));
131: }
132: }
133: }
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