001/*
002 * Cobertura - http://cobertura.sourceforge.net/
003 *
004 * Copyright (C) 2005 Jeremy Thomerson
005 *
006 * Note: This file is dual licensed under the GPL and the Apache
007 * Source License (so that it can be used from both the main
008 * Cobertura classes and the ant tasks).
009 *
010 * Cobertura is free software; you can redistribute it and/or modify
011 * it under the terms of the GNU General Public License as published
012 * by the Free Software Foundation; either version 2 of the License,
013 * or (at your option) any later version.
014 *
015 * Cobertura is distributed in the hope that it will be useful, but
016 * WITHOUT ANY WARRANTY; without even the implied warranty of
017 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
018 * General Public License for more details.
019 *
020 * You should have received a copy of the GNU General Public License
021 * along with Cobertura; if not, write to the Free Software
022 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
023 * USA
024 */
025
026package net.sourceforge.cobertura.util;
027
028import java.text.NumberFormat;
029
030/**
031 * Abstract, not to be instantiated utility class for String functions.
032 * 
033 * @author Jeremy Thomerson
034 */
035public abstract class StringUtil
036{
037
038        /**
039         * <p>
040         * Replaces all instances of "replace" with "with" from the "original"
041         * string.
042         * </p>
043         *
044         * <p>
045         * NOTE: it is known that a similar function is included in jdk 1.4 as replaceAll(),
046         * but is written here so as to allow backward compatibility to users using SDK's
047         * prior to 1.4
048         * </p>
049         * 
050         * @param original The original string to do replacement on.
051         * @param replace The string to replace.
052         * @param with The string to replace "replace" with.
053         * @return The replaced string.
054         */
055        public static String replaceAll(String original, String replace, String with)
056        {
057                if (original == null)
058                {
059                        return original;
060                }
061
062                final int len = replace.length();
063                StringBuffer sb = new StringBuffer(original.length());
064                int start = 0;
065                int found = -1;
066
067                while ((found = original.indexOf(replace, start)) != -1)
068                {
069                        sb.append(original.substring(start, found));
070                        sb.append(with);
071                        start = found + len;
072                }
073
074                sb.append(original.substring(start));
075                return sb.toString();
076        }
077
078        /**
079         * Takes a double and turns it into a percent string.
080         * Ex.  0.5 turns into 50%
081         * 
082         * @param value
083         * @return corresponding percent string
084         */
085        public static String getPercentValue(double value)
086        {
087                //moved from HTMLReport.getPercentValue()
088      value = Math.floor(value * 100) / 100; //to represent 199 covered lines from 200 as 99% covered, not 100 %
089                return NumberFormat.getPercentInstance().format(value);
090        }
091        
092}