/*

  * 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());

                 }

         }

 }