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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 MIT License.
 *
 * See http://opensource.org/licenses/MIT
 *
 * 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.
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 * 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.
 *
 * 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 MIT license.
 *
 * The generated images can then be used without any reference to the MIT 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.LinkedHashMap;
import java.util.Map;
import java.util.regex.Pattern;

class MaxSizeHashMap extends LinkedHashMap {
	private final int maxSize;

	public MaxSizeHashMap(int maxSize) {
		this.maxSize = maxSize;
	}

	@Override
	protected boolean removeEldestEntry(Map.Entry eldest) {
		return size() > maxSize;
	}
}

// Splitter.java to be finished
public abstract class MyPattern {

	private static final Map cache = new MaxSizeHashMap<>(512);

	private static final Pattern2 EMPTY = new Pattern2(Pattern.compile(""));

//	static int CPT1;
//	static int CPT2;

	public static Pattern2 cmpile(final String p) {
		if (p == null || p.length() == 0) {
			return EMPTY;
		}
//		CPT1++;
		Pattern2 result = null;
		synchronized (cache) {
			result = cache.get(p);
			if (result != null) {
				return result;
			}
		}
		assert result == null;
		result = new Pattern2(Pattern.compile(transform(p), Pattern.CASE_INSENSITIVE));

		synchronized (cache) {
			cache.put(p, result);
//			CPT2++;
//			System.err.println("CPT= " + CPT1 + " / " + CPT2 + " " + cache.size());
		}

		return result;
	}

	private static String transform(String p) {
		// Replace ReadLineReader.java
		// p = p.replace("%pLN", "\\p{L}0-9"); // Unicode Letter, digit
		p = p.replace("%pLN", "\\p{L}\\p{N}"); // Unicode Letter, digit
		p = p.replace("%s", "\\s\u00A0"); // space
		p = p.replace("%q", "'\u2018\u2019"); // quote
		p = p.replace("%g", "\"\u201c\u201d"); // double quote
		return p;
	}

	public static boolean mtches(CharSequence input, String regex) {
		return cmpile(regex).matcher(input).matches();
	}

	public static CharSequence removeAll(CharSequence src, String regex) {
		return src.toString().replaceAll(transform(regex), "");
	}

}