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/**
* Copyright (C) 2011-2012 The XDocReport Team
*
* All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
package org.apache.poi.xwpf.converter.core.utils;
/**
* 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,...
*/
public static final String getString(int index) {
if (index < 1) throw new NumberFormatException(
"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,...
*/
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,...
*/
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,...).
*/
public static final String getString(int index, boolean lowercase) {
if (lowercase) {
return getLowerCaseString(index);
}
else {
return getUpperCaseString(index);
}
}
/**
* Test this class using this main method.
*/
public static void main(String[] args) {
for (int i = 1; i < 32000; i++) {
System.out.println(getString(i));
}
}
}