001/* 002 * $Id: GreekAlphabetFactory.java 4847 2011-05-05 19:46:13Z redlab_b $ 003 * 004 * This file is part of the iText (R) project. 005 * Copyright (c) 1998-2011 1T3XT BVBA 006 * Authors: Bruno Lowagie, Paulo Soares, et al. 007 * 008 * This program is free software; you can redistribute it and/or modify 009 * it under the terms of the GNU Affero General Public License version 3 010 * as published by the Free Software Foundation with the addition of the 011 * following permission added to Section 15 as permitted in Section 7(a): 012 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY 1T3XT, 013 * 1T3XT DISCLAIMS THE WARRANTY OF NON INFRINGEMENT OF THIRD PARTY RIGHTS. 014 * 015 * This program is distributed in the hope that it will be useful, but 016 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 017 * or FITNESS FOR A PARTICULAR PURPOSE. 018 * See the GNU Affero General Public License for more details. 019 * You should have received a copy of the GNU Affero General Public License 020 * along with this program; if not, see http://www.gnu.org/licenses or write to 021 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 022 * Boston, MA, 02110-1301 USA, or download the license from the following URL: 023 * http://itextpdf.com/terms-of-use/ 024 * 025 * The interactive user interfaces in modified source and object code versions 026 * of this program must display Appropriate Legal Notices, as required under 027 * Section 5 of the GNU Affero General Public License. 028 * 029 * In accordance with Section 7(b) of the GNU Affero General Public License, 030 * a covered work must retain the producer line in every PDF that is created 031 * or manipulated using iText. 032 * 033 * You can be released from the requirements of the license by purchasing 034 * a commercial license. Buying such a license is mandatory as soon as you 035 * develop commercial activities involving the iText software without 036 * disclosing the source code of your own applications. 037 * These activities include: offering paid services to customers as an ASP, 038 * serving PDFs on the fly in a web application, shipping iText with a closed 039 * source product. 040 * 041 * For more information, please contact iText Software Corp. at this 042 * address: sales@itextpdf.com 043 */ 044package com.itextpdf.text.factories; 045 046import com.itextpdf.text.SpecialSymbol; 047 048/** 049 * This class can produce String combinations representing a number built with 050 * Greek letters (from alpha to omega, then alpha alpha, alpha beta, alpha gamma). 051 * We are aware of the fact that the original Greek numbering is different; 052 * See http://www.cogsci.indiana.edu/farg/harry/lan/grknum.htm#ancient 053 * but this isn't implemented yet; the main reason being the fact that we 054 * need a font that has the obsolete Greek characters qoppa and sampi. 055 * 056 * @since 2.0.7 (was called GreekNumberFactory in earlier versions) 057 */ 058public class GreekAlphabetFactory { 059 /** 060 * Changes an int into a lower case Greek letter combination. 061 * @param index the original number 062 * @return the letter combination 063 */ 064 public static final String getString(final int index) { 065 return getString(index, true); 066 } 067 068 /** 069 * Changes an int into a lower case Greek letter combination. 070 * @param index the original number 071 * @return the letter combination 072 */ 073 public static final String getLowerCaseString(final int index) { 074 return getString(index); 075 } 076 077 /** 078 * Changes an int into a upper case Greek letter combination. 079 * @param index the original number 080 * @return the letter combination 081 */ 082 public static final String getUpperCaseString(final int index) { 083 return getString(index).toUpperCase(); 084 } 085 086 /** 087 * Changes an int into a Greek letter combination. 088 * @param index the original number 089 * @param lowercase set to lowercase 090 * @return the letter combination 091 */ 092 public static final String getString(int index, final boolean lowercase) { 093 if (index < 1) return ""; 094 index--; 095 096 int bytes = 1; 097 int start = 0; 098 int symbols = 24; 099 while(index >= symbols + start) { 100 bytes++; 101 start += symbols; 102 symbols *= 24; 103 } 104 105 int c = index - start; 106 char[] value = new char[bytes]; 107 while(bytes > 0) { 108 bytes--; 109 value[bytes] = (char)(c % 24); 110 if (value[bytes] > 16) value[bytes]++; 111 value[bytes] += (lowercase ? 945 : 913); 112 value[bytes] = SpecialSymbol.getCorrespondingSymbol(value[bytes]); 113 c /= 24; 114 } 115 116 return String.valueOf(value); 117 } 118}