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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:
 *
 * https://plantuml.com/patreon (only 1$ per month!)
 * https://plantuml.com/liberapay (only 1€ per month!)
 * https://plantuml.com/paypal
 *
 *
 * PlantUML is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * PlantUML 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 Lesser General Public
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library.  If not, see .
 *
 * 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 LGPL license.
 *
 * The generated images can then be used without any reference to the LGPL 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.regex;

import java.util.HashMap;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import net.sourceforge.plantuml.utils.Log;

public class Matcher2 {

	private final static boolean INSTRUMENT = false;
	private final Matcher matcher;
	private final String id;

	private Matcher2(Matcher matcher, String id) {
		this.matcher = matcher;
		this.id = id;
	}

	public static Matcher2 build(Pattern pattern, CharSequence input) {
		final long now = System.currentTimeMillis();
		final String id = pattern.pattern();
		try {
			final Matcher matcher2 = pattern.matcher(input);
			return new Matcher2(matcher2, id);
		} finally {
			if (INSTRUMENT) {
				addTime(id, System.currentTimeMillis() - now);
			}
		}
	}

	public boolean matches() {
		final long now = System.currentTimeMillis();
		try {
			return matcher.matches();
		} finally {
			addTime(System.currentTimeMillis() - now);
		}
	}

	private void addTime(long duration) {
		if (INSTRUMENT == false) {
			return;
		}
		addTime(id, duration);
	}

	private static final Map durations = new HashMap();
	private static long printed;

	private static synchronized void addTime(String id, long duration) {
		Long total = durations.get(id);
		if (total == null) {
			total = 0L;
		}
		total += duration;
		durations.put(id, total);
		final String longest = getLongest();
		if (longest == null) {
			return;
		}
		if (durations.get(longest) > printed) {
			Log.info("---------- Regex " + longest + " " + durations.get(longest) + "ms (" + durations.size() + ")");
			printed = durations.get(longest);
		}

	}

	private static String getLongest() {
		long max = 0;
		String result = null;
		for (Map.Entry ent : durations.entrySet()) {
			if (ent.getValue() > max) {
				max = ent.getValue();
				result = ent.getKey();
			}
		}
		return result;
	}

	public String group(int n) {
		final long now = System.currentTimeMillis();
		try {
			return matcher.group(n);
		} finally {
			addTime(System.currentTimeMillis() - now);
		}
	}

	public String group() {
		final long now = System.currentTimeMillis();
		try {
			return matcher.group();
		} finally {
			addTime(System.currentTimeMillis() - now);
		}
	}

	public int groupCount() {
		final long now = System.currentTimeMillis();
		try {
			return matcher.groupCount();
		} finally {
			addTime(System.currentTimeMillis() - now);
		}
	}

	public boolean find() {
		final long now = System.currentTimeMillis();
		try {
			return matcher.find();
		} finally {
			addTime(System.currentTimeMillis() - now);
		}
	}

	public int end() {
		final long now = System.currentTimeMillis();
		try {
			return matcher.end();
		} finally {
			addTime(System.currentTimeMillis() - now);
		}
	}

	public int start() {
		final long now = System.currentTimeMillis();
		try {
			return matcher.start();
		} finally {
			addTime(System.currentTimeMillis() - now);
		}
	}

}