Java Timestamp datetime2ToTimestamp(long value, int fraction, int width)

Description

datetime To Timestamp

License

Apache License

Declaration

public static java.sql.Timestamp datetime2ToTimestamp(long value, int fraction, int width) 

Method Source Code

//package com.java2s;
/**//from   w  w w  .j  a va  2  s. com
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (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.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import java.util.Calendar;

public class Main {
    public static java.sql.Timestamp datetime2ToTimestamp(long value, int fraction, int width) {
        final long millis = getMillisFromDatetime2(value);
        final java.sql.Timestamp r = new java.sql.Timestamp(millis);
        r.setNanos(nanosForFractionalValue(fraction, width));
        return r;
    }

    public static long getMillisFromDatetime2(long value) {
        final long x = (value >> 22) & 0x1FFFFL;
        final int year = (int) (x / 13);
        final int month = (int) (x % 13);
        final int day = ((int) (value >> 17)) & 0x1F;
        final int hour = ((int) (value >> 12)) & 0x1F;
        final int minute = ((int) (value >> 6)) & 0x3F;
        final int second = ((int) (value >> 0)) & 0x3F;

        final Calendar c = Calendar.getInstance();
        c.set(year, month - 1, day, hour, minute, second);
        c.set(Calendar.MILLISECOND, 0);

        return c.getTimeInMillis();
    }

    public static int nanosForFractionalValue(int value, int width) {
        switch (width) {
        case 0:
            return 0;
        case 1:
            return value * 10000000;
        case 2:
            return value * 100000;
        case 3:
            return value * 1000;
        default:
            throw new RuntimeException("unexpected number of fractional bytes");
        }
    }
}

Related

1. dateAdd(Timestamp t1, Integer i, int type)
2. dateAndTimeToTimestamp(Date data, Time hora)
3. dateIntToTimestamp(int dateInt)
4. datesDiffer(Timestamp a, Timestamp b)
5. dateStringToTimestamp(String dateStr)
6. dateTimeToString(Timestamp dt, String df)
7. dateToOracleStr(java.sql.Timestamp ts)
8. dayNumber(Timestamp stamp)
9. daysBetween(Timestamp t1, Timestamp t2)