/*
* $Id: RomanAlphabetFactory.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
* disclosing the source code of your own applications.
* These activities include: offering paid services to customers as an ASP,
* serving PDFs on the fly in a web application, shipping iText with a closed
* source product.
*
* For more information, please contact iText Software Corp. at this
* address: [email protected]
*/
package com.itextpdf.text.factories;
import com.itextpdf.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 index
* @return a translated string
*/
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 int to translate
* @return the string in lowercase
*/
public static final String getLowerCaseString(final 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 int to translate
* @return the string in uppercase
*/
public static final String getUpperCaseString(final 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 int to translate
* @param lowercase true if the string sshould be lowercase false otherwise
* @return the translated string
*/
public static final String getString(final int index, final boolean lowercase) {
if (lowercase) {
return getLowerCaseString(index);
}
else {
return getUpperCaseString(index);
}
}
}
|