package org.activityinfo.legacy.shared.reports.model.labeling;
/*
* #%L
* ActivityInfo Server
* %%
* Copyright (C) 2009 - 2013 UNICEF
* %%
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program. If not, see
* <http://www.gnu.org/licenses/gpl-3.0.html>.
* #L%
*/
import javax.xml.bind.annotation.XmlRootElement;
/**
* Provides a sequence of latin letters: A...Z, AA..AZ
*
* @author Alex Bertram
*/
@XmlRootElement
public class LatinAlphaSequence implements LabelSequence {
private int nextNumber = 0;
@Override
public String next() {
int number = nextNumber++;
StringBuilder label = new StringBuilder();
while (number >= 26) {
int digit = number / 26;
label.append((char) (65 + digit));
number -= digit * 26;
}
return label.toString();
}
}