Cobertura example source code file (RegexUtil.java)

This example Cobertura source code file (RegexUtil.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Cobertura tags/keywords

iterator, logger, malformedpatternexception, pattern, pattern, perl5compiler, perl5compiler, perl5matcher, perl5matcher, regexutil, string, string, the, util

The Cobertura RegexUtil.java source code

/*
 * Cobertura - http://cobertura.sourceforge.net/
 *
 * Copyright (C) 2005 Mark Doliner
 * Copyright (C) 2006 John Lewis
 *
 * Note: This file is dual licensed under the GPL and the Apache
 * Source License (so that it can be used from both the main
 * Cobertura classes and the ant tasks).
 *
 * Cobertura 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 2 of the License,
 * or (at your option) any later version.
 *
 * Cobertura is 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 Cobertura; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA
 */

package net.sourceforge.cobertura.util;

import java.util.Collection;
import java.util.Iterator;

import org.apache.log4j.Logger;
import org.apache.oro.text.regex.MalformedPatternException;
import org.apache.oro.text.regex.Pattern;
import org.apache.oro.text.regex.Perl5Compiler;
import org.apache.oro.text.regex.Perl5Matcher;

/**
 * Abstract, not to be instantiated utility class for Regex functions.
 * 
 * @author John Lewis (logic copied from MethodInstrumenter)
 */
public abstract class RegexUtil
{

	private static final Logger logger = Logger.getLogger(RegexUtil.class);

	private final static Perl5Matcher pm = new Perl5Matcher();

	/**
	 * <p>
	 * Check to see if one of the regular expressions in a collection match
	 * an input string.
	 * </p>
	 *
	 * @param regexs The collection of regular expressions.
	 * @param str The string to check for a match.
	 * @return True if a match is found.
	 */
	public static boolean matches(Collection regexs, String str)
	{
		Iterator iter = regexs.iterator();
		while (iter.hasNext())
		{
			Pattern regex = (Pattern)iter.next();
			if (pm.matches(str, regex))
			{
				return true;
			}
		}

		return false;
	}

	public static void addRegex(Collection list, String regex)
	{
		try
		{
			Perl5Compiler pc = new Perl5Compiler();
			Pattern pattern = pc.compile(regex);
			list.add(pattern);
		}
		catch (MalformedPatternException e)
		{
			logger.warn("The regular expression " + regex + " is invalid: "
					+ e.getLocalizedMessage());
		}
	}

}