/*
* $Id: GreekAlphabetFactory.java 4847 2011-05-05 19:46:13Z redlab_b $
*
* This file is part of the iText (R) project.
* Copyright (c) 1998-2011 1T3XT BVBA
* Authors: Bruno Lowagie, Paulo Soares, et al.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License version 3
* as published by the Free Software Foundation with the addition of the
* following permission added to Section 15 as permitted in Section 7(a):
* FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY 1T3XT,
* 1T3XT DISCLAIMS THE WARRANTY OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU Affero General Public License for more details.
* You should have received a copy of the GNU Affero General Public License
* along with this program; if not, see http://www.gnu.org/licenses or write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA, 02110-1301 USA, or download the license from the following URL:
* http://itextpdf.com/terms-of-use/
*
* The interactive user interfaces in modified source and object code versions
* of this program must display Appropriate Legal Notices, as required under
* Section 5 of the GNU Affero General Public License.
*
* In accordance with Section 7(b) of the GNU Affero General Public License,
* a covered work must retain the producer line in every PDF that is created
* or manipulated using iText.
*
* You can be released from the requirements of the license by purchasing
* a commercial license. Buying such a license is mandatory as soon as you
* develop commercial activities involving the iText software without
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*/
package com.itextpdf.text.factories;
import com.itextpdf.text.SpecialSymbol;
/**
* This class can produce String combinations representing a number built with
* Greek letters (from alpha to omega, then alpha alpha, alpha beta, alpha gamma).
* We are aware of the fact that the original Greek numbering is different;
* See http://www.cogsci.indiana.edu/farg/harry/lan/grknum.htm#ancient
* but this isn't implemented yet; the main reason being the fact that we
* need a font that has the obsolete Greek characters qoppa and sampi.
*
* @since 2.0.7 (was called GreekNumberFactory in earlier versions)
*/
public class GreekAlphabetFactory {
/**
* Changes an int into a lower case Greek letter combination.
* @param index the original number
* @return the letter combination
*/
public static final String getString(final int index) {
return getString(index, true);
}
/**
* Changes an int into a lower case Greek letter combination.
* @param index the original number
* @return the letter combination
*/
public static final String getLowerCaseString(final int index) {
return getString(index);
}
/**
* Changes an int into a upper case Greek letter combination.
* @param index the original number
* @return the letter combination
*/
public static final String getUpperCaseString(final int index) {
return getString(index).toUpperCase();
}
/**
* Changes an int into a Greek letter combination.
* @param index the original number
* @param lowercase set to lowercase
* @return the letter combination
*/
public static final String getString(int index, final boolean lowercase) {
if (index < 1) return "";
index--;
int bytes = 1;
int start = 0;
int symbols = 24;
while(index >= symbols + start) {
bytes++;
start += symbols;
symbols *= 24;
}
int c = index - start;
char[] value = new char[bytes];
while(bytes > 0) {
bytes--;
value[bytes] = (char)(c % 24);
if (value[bytes] > 16) value[bytes]++;
value[bytes] += (lowercase ? 945 : 913);
value[bytes] = SpecialSymbol.getCorrespondingSymbol(value[bytes]);
c /= 24;
}
return String.valueOf(value);
}
}
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