Example usage for java.util TimeZone getDSTSavings

Introduction

In this page you can find the example usage for java.util TimeZone getDSTSavings.

Prototype

public int getDSTSavings()

Source Link

Document

Returns the amount of time to be added to local standard time to get local wall clock time.

Usage

From source file:com.cloud.api.ApiResponseHelper.java

public String getDateStringInternal(Date inputDate) {
    if (inputDate == null) {
        return null;
    }/*from ww w  .j av  a  2 s .  c om*/

    TimeZone tz = _usageSvc.getUsageTimezone();
    Calendar cal = Calendar.getInstance(tz);
    cal.setTime(inputDate);

    StringBuilder sb = new StringBuilder(32);
    sb.append(cal.get(Calendar.YEAR)).append('-');

    int month = cal.get(Calendar.MONTH) + 1;
    if (month < 10) {
        sb.append('0');
    }
    sb.append(month).append('-');

    int day = cal.get(Calendar.DAY_OF_MONTH);
    if (day < 10) {
        sb.append('0');
    }
    sb.append(day);

    sb.append("'T'");

    int hour = cal.get(Calendar.HOUR_OF_DAY);
    if (hour < 10) {
        sb.append('0');
    }
    sb.append(hour).append(':');

    int minute = cal.get(Calendar.MINUTE);
    if (minute < 10) {
        sb.append('0');
    }
    sb.append(minute).append(':');

    int seconds = cal.get(Calendar.SECOND);
    if (seconds < 10) {
        sb.append('0');
    }
    sb.append(seconds);

    double offset = cal.get(Calendar.ZONE_OFFSET);
    if (tz.inDaylightTime(inputDate)) {
        offset += (1.0 * tz.getDSTSavings()); // add the timezone's DST
        // value (typically 1 hour
        // expressed in milliseconds)
    }

    offset = offset / (1000d * 60d * 60d);
    int hourOffset = (int) offset;
    double decimalVal = Math.abs(offset) - Math.abs(hourOffset);
    int minuteOffset = (int) (decimalVal * 60);

    if (hourOffset < 0) {
        if (hourOffset > -10) {
            sb.append("-0");
        } else {
            sb.append('-');
        }
        sb.append(Math.abs(hourOffset));
    } else {
        if (hourOffset < 10) {
            sb.append("+0");
        } else {
            sb.append("+");
        }
        sb.append(hourOffset);
    }

    sb.append(':');

    if (minuteOffset == 0) {
        sb.append("00");
    } else if (minuteOffset < 10) {
        sb.append('0').append(minuteOffset);
    } else {
        sb.append(minuteOffset);
    }

    return sb.toString();
}

From source file:com.redhat.rhn.frontend.xmlrpc.system.SystemHandler.java

private Date convertLocalToUtc(Date in) {
    Calendar c = Calendar.getInstance();
    c.setTime(in);/*from   w w  w .  j a v  a 2 s .  c om*/
    TimeZone z = c.getTimeZone();
    int offset = z.getRawOffset();
    if (z.inDaylightTime(in)) {
        offset += z.getDSTSavings();
    }
    int offsetHrs = offset / 1000 / 60 / 60;
    int offsetMins = offset / 1000 / 60 % 60;
    c.add(Calendar.HOUR_OF_DAY, (-offsetHrs));
    c.add(Calendar.MINUTE, (-offsetMins));
    c.set(Calendar.MILLISECOND, 0);
    return c.getTime();
}