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PlantUML is a component that allows to quickly write diagrams from text.
There is a newer version: 1.2024.8
// THIS FILE HAS BEEN GENERATED BY A PREPROCESSOR.
/* +=======================================================================
 * |
 * |      PlantUML : a free UML diagram generator
 * |
 * +=======================================================================
 *
 * (C) Copyright 2009-2024, Arnaud Roques
 *
 * Project Info:  https://plantuml.com
 *
 * If you like this project or if you find it useful, you can support us at:
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 *
 * PlantUML is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License V2.
 *
 * THE ACCOMPANYING PROGRAM IS PROVIDED UNDER THE TERMS OF THIS ECLIPSE PUBLIC
 * LICENSE ("AGREEMENT"). [GNU General Public License V2]
 *
 * ANY USE, REPRODUCTION OR DISTRIBUTION OF THE PROGRAM CONSTITUTES
 * RECIPIENT'S ACCEPTANCE OF THIS AGREEMENT.
 *
 * You may obtain a copy of the License at
 *
 * https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * PlantUML can occasionally display sponsored or advertising messages. Those
 * messages are usually generated on welcome or error images and never on
 * functional diagrams.
 * See https://plantuml.com/professional if you want to remove them
 *
 * Images (whatever their format : PNG, SVG, EPS...) generated by running PlantUML
 * are owned by the author of their corresponding sources code (that is, their
 * textual description in PlantUML language). Those images are not covered by
 * this GPL v2 license.
 *
 * The generated images can then be used without any reference to the GPL v2 license.
 * It is not even necessary to stipulate that they have been generated with PlantUML,
 * although this will be appreciated by the PlantUML team.
 *
 * There is an exception : if the textual description in PlantUML language is also covered
 * by any license, then the generated images are logically covered
 * by the very same license.
 *
 * This is the IGY distribution (Install GraphViz by Yourself).
 * You have to install GraphViz and to setup the GRAPHVIZ_DOT environment variable
 * (see https://plantuml.com/graphviz-dot )
 *
 * Icons provided by OpenIconic :  https://useiconic.com/open
 * Archimate sprites provided by Archi :  http://www.archimatetool.com
 * Stdlib AWS provided by https://github.com/milo-minderbinder/AWS-PlantUML
 * Stdlib Icons provided https://github.com/tupadr3/plantuml-icon-font-sprites
 * ASCIIMathML (c) Peter Jipsen http://www.chapman.edu/~jipsen
 * ASCIIMathML (c) David Lippman http://www.pierce.ctc.edu/dlippman
 * CafeUndZopfli ported by Eugene Klyuchnikov https://github.com/eustas/CafeUndZopfli
 * Brotli (c) by the Brotli Authors https://github.com/google/brotli
 * Themes (c) by Brett Schwarz https://github.com/bschwarz/puml-themes
 * Twemoji (c) by Twitter at https://twemoji.twitter.com/
 *
 */
package net.sourceforge.plantuml.sequencediagram;

import java.text.DecimalFormat;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class DottedNumber {

	private final List nums;
	private final List separators;

	private DottedNumber(List nums, List separators) {
		this.nums = nums;
		this.separators = separators;
	}

	public static DottedNumber create(String value) {
		final Pattern p = Pattern.compile("(\\d+)|(\\D+)");
		final Matcher m = p.matcher(value);
		final List nums = new ArrayList<>();
		final List separators = new ArrayList<>();
		while (m.find()) {
			final String part = m.group();
			if (isDigit(part.charAt(0))) {
				nums.add(Integer.parseInt(part));
			} else {
				separators.add(part);
			}
		}
		return new DottedNumber(nums, separators);
	}

	private static boolean isDigit(final char c) {
		return c >= '0' && c <= '9';
	}

	@Override
	public String toString() {
		final StringBuilder sb = new StringBuilder();
		for (int i = 0; i < nums.size(); i++) {
			sb.append(nums.get(i));
			if (i < separators.size()) {
				sb.append(separators.get(i));
			}
		}
		return sb.toString();
	}

	public void incrementMinor(int step) {
		final int last = nums.size() - 1;
		final int newValue = nums.get(last) + step;
		nums.set(last, newValue);
	}

	public void incrementIntermediate() {
		final int intermediate = nums.size() == 1 ? 0 : nums.size() - 2;
		incrementIntermediate(intermediate);
	}

	public void incrementIntermediate(int position) {
		final int intermediate = position;
		final int newValue = nums.get(intermediate) + 1;
		for (int i = intermediate + 1; i < nums.size(); i++) {
			nums.set(i, 1);
		}
		nums.set(intermediate, newValue);
	}

	public String format(DecimalFormat format) {
		if (nums.size() == 1 && separators.size() == 0) {
			return format.format(nums.get(0));
		}
		return "" + toString() + "";
	}

}