net.sourceforge.plantuml.command.regex.RegexLeaf Maven / Gradle / Ivy

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/* ========================================================================
 * PlantUML : a free UML diagram generator
 * ========================================================================
 *
 * (C) Copyright 2009-2012, Arnaud Roques
 *
 * Project Info:  http://plantuml.sourceforge.net
 * 
 * This file is part of PlantUML.
 *
 * PlantUML is free software; you can redistribute it and/or modify it
 * under the terms of the GNU 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 General Public
 * License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
 * USA.
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
 * in the United States and other countries.]
 *
 * Original Author:  Arnaud Roques
 * 
 * Revision $Revision: 4762 $
 *
 */
package net.sourceforge.plantuml.command.regex;

import java.util.Collections;
import java.util.Iterator;
import java.util.Map;
import java.util.regex.Pattern;

public class RegexLeaf implements IRegex {

	private final Pattern pattern;
	private final String name;

	private int count = -1;

	public RegexLeaf(String regex) {
		this(null, regex);
	}

	public RegexLeaf(String name, String regex) {
		this.pattern = Pattern.compile(regex, Pattern.CASE_INSENSITIVE);
		this.name = name;
	}

	public String getName() {
		return name;
	}

	public String getPattern() {
		return pattern.pattern();
	}

	public int count() {
		if (count == -1) {
			count = pattern.matcher("").groupCount();
		}
		return count;
	}

	public Map createPartialMatch(Iterator it) {
		final RegexPartialMatch m = new RegexPartialMatch(name);
		for (int i = 0; i < count(); i++) {
			final String group = it.next();
			m.add(group);
		}
		if (name == null) {
			return Collections.emptyMap();
		}
		return Collections.singletonMap(name, m);
	}

}