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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 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.brotli;

import java.nio.ByteBuffer;

/**
 * Collection of static dictionary words.
 *
 * 
 * Dictionary content is loaded from binary resource when {@link #getData()} is
 * executed for the first time. Consequently, it saves memory and CPU in case
 * dictionary is not required.
 *
 * 
 * One possible drawback is that multiple threads that need dictionary data may
 * be blocked (only once in each classworld). To avoid this, it is enough to
 * call {@link #getData()} proactively.
 */
public final class Dictionary {
	private static volatile ByteBuffer data;

	private static class DataLoader {
		static final boolean OK;

		static {
			boolean ok = true;
			try {
				Class.forName(Dictionary.class.getPackage().getName() + ".DictionaryData");
			} catch (Throwable ex) {
				ok = false;
			}
			OK = ok;
		}
	}

	public static void setData(ByteBuffer data) {
		if (!data.isDirect() || !data.isReadOnly()) {
			throw new BrotliRuntimeException("data must be a direct read-only byte buffer");
		}
		Dictionary.data = data;
	}

	public static ByteBuffer getData() {
		if (data != null) {
			return data;
		}
		if (!DataLoader.OK) {
			throw new BrotliRuntimeException("brotli dictionary is not set");
		}
		/* Might have been set when {@link DictionaryData} was loaded. */
		return data;
	}
}