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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.salt;

import java.util.ArrayList;
import java.util.List;
import java.util.StringTokenizer;

import net.sourceforge.plantuml.StringUtils;
import net.sourceforge.plantuml.regex.Matcher2;
import net.sourceforge.plantuml.regex.MyPattern;
import net.sourceforge.plantuml.regex.Pattern2;

public class DataSourceImpl implements DataSource {

	private int i = 0;
	private final List> data = new ArrayList>();

	public DataSourceImpl(List data) {
		final Pattern2 p = MyPattern.cmpile("\\{(?:[-+^#!*/]|S-|SI|S)?");

		for (String s : data) {
			final StringTokenizer st = new StringTokenizer(s, "|}", true);
			while (st.hasMoreTokens()) {
				final String token = StringUtils.trin(st.nextToken());
				if (token.equals("|")) {
					continue;
				}
				final Terminator terminator = st.hasMoreTokens() ? Terminator.NEWCOL : Terminator.NEWLINE;
				final Matcher2 m = p.matcher(token);
				final boolean found = m.find();
				if (found == false) {
					addInternal(token, terminator);
					continue;
				}
				int lastStart = 0;
				int end = 0;
				do {
					final int start = m.start();
					if (start > lastStart) {
						addInternal(token.substring(lastStart, start), Terminator.NEWCOL);
					}
					end = m.end();
					final Terminator t = end == token.length() ? terminator : Terminator.NEWCOL;
					addInternal(token.substring(start, end), t);
					lastStart = end;
				} while (m.find());
				if (end < token.length()) {
					addInternal(token.substring(end), terminator);
				}
			}
		}
	}

	private void addInternal(String s, Terminator t) {
		s = StringUtils.trin(s);
		if (s.length() > 0) {
			data.add(new Terminated<>(s, t));
		}
	}

	public Terminated peek(int nb) {
		return data.get(i + nb);
	}

	public boolean hasNext() {
		return i < data.size();
	}

	public Terminated next() {
		final Terminated result = data.get(i);
		i++;
		return result;
	}

	public void remove() {
		throw new UnsupportedOperationException();
	}

	public String toString() {
		return super.toString() + " " + (hasNext() ? peek(0) : "$$$");
	}

}