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package org.gvsig.data.datastores.vectorial.file.shp_util;

import java.text.DateFormat;

import java.text.ParseException;

import java.text.ParsePosition;

import java.text.SimpleDateFormat;

import java.util.Date;

import java.util.GregorianCalendar;

import org.apache.log4j.Logger;

/**

 * Utility static methods.

 * 

 * @author jldominguez

 *

 */

public class DbfUtil {

        private static Logger logger = Logger.getLogger(DbfUtil.class);

        /**

         * Parses a string into a Date object.

         * 

         * @param str

         * @return

         */

        public static Date stringToDate(String str) {

                Date resp = null;

                try {

                        resp = (new SimpleDateFormat()).parse(str);

                } catch (ParseException e) {

                        return alternativeDateParser(str);

                }

                return resp;

        }

        private static Date alternativeDateParser(String str) {

                // TODO Auto-generated method stub

                if (str.length() == 8) {

                        try {

                                String y = str.substring(2, 4);

                                String m = str.substring(4, 6);

                                String d = str.substring(6);

                                int yy = 1900 + Integer.parseInt(y);

                                int mm = ((Integer.parseInt(m)-1) % 12);

                                int dd = Integer.parseInt(d);

                                GregorianCalendar gcal = new GregorianCalendar(yy, mm, dd);

                                Date resp = gcal.getTime();

                                return resp;

                        } catch (Exception ex) {

                                logger.error("Error while parsing: " + ex.getMessage());

                                logger.error("Returned date: 1, 1, 1970");

                        }

                } 

                return new Date(0);

        }

        private static String getMonthStr(int mm) {

                switch (mm) {

                case 0:

                        return "Jan";

                case 1:

                        return "Feb";

                case 2:

                        return "Mar";

                case 3:

                        return "Apr";

                case 4:

                        return "May";

                case 5:

                        return "Jun";

                case 6:

                        return "Jul";

                case 7:

                        return "Aug";

                case 8:

                        return "Sep";

                case 9:

                        return "Oct";

                case 10:

                        return "Nov";

                case 11:

                        return "Dec";

                }

                return "Jan";

        }

}