Android Date String Parse parseTM(String s, boolean end)

Description

Parses a value that has a TM VR as a Date .

License

LGPL

Parameter

Parameter	Description
s	the TM string to parse.
end	whether or not to initialize missing precision to the maximum values (December 31st, 23:59).

Return

the parsed date or null if the input is empty.

Declaration

public static Date parseTM(String s, boolean end) 

Method Source Code

//package com.java2s;
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1/*from   www  .  ja v  a  2 s .c  o m*/
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is part of dcm4che, an implementation of DICOM(TM) in
 * Java(TM), hosted at http://sourceforge.net/projects/dcm4che.
 *
 * The Initial Developer of the Original Code is
 * Gunter Zeilinger, Huetteldorferstr. 24/10, 1150 Vienna/Austria/Europe.
 * Portions created by the Initial Developer are Copyright (C) 2002-2005
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 * Gunter Zeilinger <gunterze@gmail.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;

public class Main {
    /**
     * Parses a value that has a TM VR as a {@link Date}.
     * 
     * @param s the TM string to parse.
     * @param end whether or not to initialize missing precision to the maximum values (December
     *        31st, 23:59).
     * @return the parsed date or <code>null</code> if the input is empty.
     */
    public static Date parseTM(String s, boolean end) {
        if (s == null || s.length() == 0) {
            return null;
        }

        Calendar c = new GregorianCalendar();
        c.clear();
        if (end) {
            setTo2359(c);
        }

        parseTM(c, s, 0, s.length());
        return c.getTime();
    }

    private static int parseTM(Calendar c, String s, int off, int len) {
        int pos = off;

        String hours = s.substring(pos, pos += 2);
        c.set(Calendar.HOUR_OF_DAY, Integer.parseInt(hours));

        if (pos < len) {
            if (!Character.isDigit(s.charAt(pos))) {
                ++pos;
            }

            if (pos + 2 <= len) {
                String minutes = s.substring(pos, pos += 2);
                c.set(Calendar.MINUTE, Integer.parseInt(minutes));

                if (pos < len) {
                    if (!Character.isDigit(s.charAt(pos))) {
                        ++pos;
                    }

                    if (pos + 2 <= len) {
                        String seconds = s.substring(pos, pos += 2);
                        c.set(Calendar.SECOND, Integer.parseInt(seconds));

                        if (pos + 1 < len) {
                            String micros = s.substring(pos + 1,
                                    Math.min(len, pos + 5));
                            while (micros.length() < 4) {
                                micros += '0';
                            }

                            int millis = roundMicrosToMillis(micros);
                            c.set(Calendar.MILLISECOND, millis);
                        }
                    }
                }
            }
        }
        return pos;
    }

    private static void setTo2359(Calendar c) {
        c.set(Calendar.HOUR_OF_DAY, 23);
        c.set(Calendar.MINUTE, 59);
        c.set(Calendar.SECOND, 59);
        c.set(Calendar.MILLISECOND, 999);
    }

    private static int roundMicrosToMillis(String micros) {
        assert micros != null && micros.length() == 4;
        double dblMicros = Integer.valueOf(micros).doubleValue();
        return (int) Math.round(dblMicros / 10.0);
    }
}

Related

1. parseLongFormat(String dateString)
2. parseSearchApiDateTime(String dateString)
3. parseString(String dateStr)
4. parseString(String dateStr, String pattern)
5. parseStringToDate(String str)
6. parseDate(String date)
7. parse(String dateStr)
8. parse(String input)
9. parse(String source, String pattern)