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package org.jogamp.jabot.util;
import java.util.Calendar;
import java.util.TimeZone;
public class TimeTool {
public static String UTC_TZ = "UTC";
public static String[] ZERO_TZs = { UTC_TZ, "GMT", "GMT0", "Zulu" };
/** Returns closest to Zulu/UTC TimeZone w/ shortest ID */
public static TimeZone getNearZuluTimeZone() {
TimeZone tz = null;
// Get preferred ..
for(int i=0; null == tz && i<ZERO_TZs.length; i++) {
tz = TimeZone.getTimeZone(ZERO_TZs[i]);
}
if(null == tz) {
// Get shortest ..
final String[] ids = TimeZone.getAvailableIDs(0);
if( null != ids && ids.length > 0 ) {
int min_len = Integer.MAX_VALUE;
int min_idx = -1;
for(int i=0; i<ids.length; i++) {
final int len = ids[i].length();
if( len < min_len ) {
min_len = len;
min_idx = i;
}
}
tz = TimeZone.getTimeZone(ids[min_idx]);
}
}
if(null == tz) {
// last resort - default
tz = TimeZone.getDefault();
}
return tz;
}
/** Returns timestamp of internal Calendar: YYYYMMDD HH:MM:SS (TMZ) */
public static String getTimeStamp(final Calendar calendar) {
final int year, month, day, hour, minute, seconds;
{
year = calendar.get(Calendar.YEAR);
month = calendar.get(Calendar.MONTH) + 1; // Jan - 1
day = calendar.get(Calendar.DAY_OF_MONTH);
hour = calendar.get(Calendar.HOUR_OF_DAY);
minute = calendar.get(Calendar.MINUTE);
seconds = calendar.get(Calendar.SECOND);
}
return String.format("%04d%02d%02d %02d:%02d:%02d (%s)",
year, month, day, hour, minute, seconds, calendar.getTimeZone().getID());
}
}
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