001/**
002 * Copyright (C) 2007 - 2016, Jens Lehmann
003 *
004 * This file is part of DL-Learner.
005 *
006 * DL-Learner is free software; you can redistribute it and/or modify
007 * it under the terms of the GNU General Public License as published by
008 * the Free Software Foundation; either version 3 of the License, or
009 * (at your option) any later version.
010 *
011 * DL-Learner is distributed in the hope that it will be useful,
012 * but WITHOUT ANY WARRANTY; without even the implied warranty of
013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
014 * GNU General Public License for more details.
015 *
016 * You should have received a copy of the GNU General Public License
017 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
018 */
019package org.dllearner.utilities.statistics;
020
021/**
022 * Copyright (C) 2007-2008, Jens Lehmann
023 *
024 * This file is part of DL-Learner.
025 * 
026 * DL-Learner is free software; you can redistribute it and/or modify
027 * it under the terms of the GNU General Public License as published by
028 * the Free Software Foundation; either version 3 of the License, or
029 * (at your option) any later version.
030 *
031 * DL-Learner is distributed in the hope that it will be useful,
032 * but WITHOUT ANY WARRANTY; without even the implied warranty of
033 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
034 * GNU General Public License for more details.
035 *
036 * You should have received a copy of the GNU General Public License
037 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
038 *
039 */
040import org.apache.log4j.Logger;
041
042/**
043 * Class for counting time and outputting it.
044 * 
045 * @author Unknown
046 */
047public class SimpleClock {
048
049        private static Logger logger = Logger.getLogger(SimpleClock.class);
050
051        private long time;
052
053        public SimpleClock() {
054                time = System.currentTimeMillis();
055        }
056
057        /**
058         * prints time needed and resets the clock
059         */
060        public void printAndSet() {
061                logger.info("needed " + getTime() + " ms");
062                setTime();
063        }
064
065        /**
066         * prints time needed and resets the clock
067         * 
068         * @param s
069         *            String for printing
070         */
071        public void printAndSet(String s) {
072                logger.info(s + " needed " + getTime() + " ms");
073                setTime();
074        }
075
076        public String getAndSet(String s) {
077                String ret = s + " needed " + getTime() + " ms";
078                setTime();
079                return ret;
080        }
081
082        /**
083         * prints time needed
084         * 
085         * @param s
086         *            String for printing
087         */
088        public void print(String s) {
089                logger.info(s + " needed " + getTime() + " ms");
090        }
091
092        /**
093         * resets the clock
094         */
095        public void setTime() {
096                time = System.currentTimeMillis();
097        }
098
099        /**
100         * resets the clock
101         */
102        public void reset() {
103                setTime();
104        }
105
106        /**
107         * @return the needed time up to now in ms
108         */
109        public long getTime() {
110                long now = System.currentTimeMillis();
111                return now - time;
112        }
113
114}