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/*
* $Id: RomanAlphabetFactory.java 4065 2009-09-16 23:09:11Z psoares33 $
*
* Copyright 2007 by Bruno Lowagie.
*
* The contents of this file are subject to the Mozilla Public License Version 1.1
* (the "License"); you may not use this file except in compliance with the License.
* You may obtain a copy of the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the License.
*
* The Original Code is 'iText, a free JAVA-PDF library'.
*
* The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
* the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
* All Rights Reserved.
* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
* are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
*
* Contributor(s): all the names of the contributors are added in the source code
* where applicable.
*
* Alternatively, the contents of this file may be used under the terms of the
* LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
* provisions of LGPL are applicable instead of those above. If you wish to
* allow use of your version of this file only under the terms of the LGPL
* License and not to allow others to use your version of this file under
* the MPL, indicate your decision by deleting the provisions above and
* replace them with the notice and other provisions required by the LGPL.
* If you do not delete the provisions above, a recipient may use your version
* of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the MPL as stated above or under the terms of the GNU
* Library General Public License as published by the Free Software Foundation;
* either version 2 of the License, or any later version.
*
* This library 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 Library general Public License for more
* details.
*
* If you didn't download this code from the following link, you should check if
* you aren't using an obsolete version:
* https://github.com/LibrePDF/OpenPDF
*/
package com.lowagie.text.factories;
import com.lowagie.text.error_messages.MessageLocalization;
/**
* This class can produce String combinations representing a number.
* "a" to "z" represent 1 to 26, "AA" represents 27, "AB" represents 28,
* and so on; "ZZ" is followed by "AAA".
*/
public class RomanAlphabetFactory {
/**
* Translates a positive integer (not equal to zero)
* into a String using the letters 'a' to 'z';
* 1 = a, 2 = b, ..., 26 = z, 27 = aa, 28 = ab,...
* @param index the integer to translate
* @return the lowercase String representing the integer
*/
public static final String getString(int index) {
if (index < 1) throw new NumberFormatException(MessageLocalization.getComposedMessage("you.can.t.translate.a.negative.number.into.an.alphabetical.value"));
index--;
int bytes = 1;
int start = 0;
int symbols = 26;
while(index >= symbols + start) {
bytes++;
start += symbols;
symbols *= 26;
}
int c = index - start;
char[] value = new char[bytes];
while(bytes > 0) {
value[--bytes] = (char)( 'a' + (c % 26));
c /= 26;
}
return new String(value);
}
/**
* Translates a positive integer (not equal to zero)
* into a String using the letters 'a' to 'z';
* 1 = a, 2 = b, ..., 26 = z, 27 = aa, 28 = ab,...
* @param index the number to translate
* @return the lowercase String representing the integer
*/
public static final String getLowerCaseString(int index) {
return getString(index);
}
/**
* Translates a positive integer (not equal to zero)
* into a String using the letters 'A' to 'Z';
* 1 = A, 2 = B, ..., 26 = Z, 27 = AA, 28 = AB,...
* @param index the number to translate
* @return the uppercase String representing the integer
*/
public static final String getUpperCaseString(int index) {
return getString(index).toUpperCase();
}
/**
* Translates a positive integer (not equal to zero)
* into a String using the letters 'a' to 'z'
* (a = 1, b = 2, ..., z = 26, aa = 27, ab = 28,...).
* @param index the number to translate
* @param lowercase true for lowercase, false for uppercase
* @return the lowercase String representing the integer
*/
public static final String getString(int index, boolean lowercase) {
if (lowercase) {
return getLowerCaseString(index);
}
else {
return getUpperCaseString(index);
}
}
}
