org.joda.time.tz
Class DateTimeZoneBuilder

java.lang.Object
  org.joda.time.tz.DateTimeZoneBuilder

public class DateTimeZoneBuilder
extends Object

DateTimeZoneBuilder allows complex DateTimeZones to be constructed. Since creating a new DateTimeZone this way is a relatively expensive operation, built zones can be written to a file. Reading back the encoded data is a quick operation.

DateTimeZoneBuilder itself is mutable and not thread-safe, but the DateTimeZone objects that it builds are thread-safe and immutable.

It is intended that ZoneInfoCompiler be used to read time zone data files, indirectly calling DateTimeZoneBuilder. The following complex example defines the America/Los_Angeles time zone, with all historical transitions:

 DateTimeZone America_Los_Angeles = new DateTimeZoneBuilder()
     .addCutover(-2147483648, 'w', 1, 1, 0, false, 0)
     .setStandardOffset(-28378000)
     .setFixedSavings("LMT", 0)
     .addCutover(1883, 'w', 11, 18, 0, false, 43200000)
     .setStandardOffset(-28800000)
     .addRecurringSavings("PDT", 3600000, 1918, 1919, 'w',  3, -1, 7, false, 7200000)
     .addRecurringSavings("PST",       0, 1918, 1919, 'w', 10, -1, 7, false, 7200000)
     .addRecurringSavings("PWT", 3600000, 1942, 1942, 'w',  2,  9, 0, false, 7200000)
     .addRecurringSavings("PPT", 3600000, 1945, 1945, 'u',  8, 14, 0, false, 82800000)
     .addRecurringSavings("PST",       0, 1945, 1945, 'w',  9, 30, 0, false, 7200000)
     .addRecurringSavings("PDT", 3600000, 1948, 1948, 'w',  3, 14, 0, false, 7200000)
     .addRecurringSavings("PST",       0, 1949, 1949, 'w',  1,  1, 0, false, 7200000)
     .addRecurringSavings("PDT", 3600000, 1950, 1966, 'w',  4, -1, 7, false, 7200000)
     .addRecurringSavings("PST",       0, 1950, 1961, 'w',  9, -1, 7, false, 7200000)
     .addRecurringSavings("PST",       0, 1962, 1966, 'w', 10, -1, 7, false, 7200000)
     .addRecurringSavings("PST",       0, 1967, 2147483647, 'w', 10, -1, 7, false, 7200000)
     .addRecurringSavings("PDT", 3600000, 1967, 1973, 'w', 4, -1,  7, false, 7200000)
     .addRecurringSavings("PDT", 3600000, 1974, 1974, 'w', 1,  6,  0, false, 7200000)
     .addRecurringSavings("PDT", 3600000, 1975, 1975, 'w', 2, 23,  0, false, 7200000)
     .addRecurringSavings("PDT", 3600000, 1976, 1986, 'w', 4, -1,  7, false, 7200000)
     .addRecurringSavings("PDT", 3600000, 1987, 2147483647, 'w', 4, 1, 7, true, 7200000)
     .toDateTimeZone("America/Los_Angeles", true);
 

Since:

1.0

See Also:

ZoneInfoCompiler, ZoneInfoProvider

DateTimeZoneBuilder

public DateTimeZoneBuilder()

readFrom

public static DateTimeZone readFrom(InputStream in,
                                    String id)
                             throws IOException

Decodes a built DateTimeZone from the given stream, as encoded by writeTo.

Parameters:

in - input stream to read encoded DateTimeZone from.

id - time zone id to assign

Throws:

IOException

readFrom

public static DateTimeZone readFrom(DataInput in,
                                    String id)
                             throws IOException

Decodes a built DateTimeZone from the given stream, as encoded by writeTo.

Parameters:

in - input stream to read encoded DateTimeZone from.

id - time zone id to assign

Throws:

IOException

addCutover

public DateTimeZoneBuilder addCutover(int year,
                                      char mode,
                                      int monthOfYear,
                                      int dayOfMonth,
                                      int dayOfWeek,
                                      boolean advanceDayOfWeek,
                                      int millisOfDay)

Adds a cutover for added rules. The standard offset at the cutover defaults to 0. Call setStandardOffset afterwards to change it.

Parameters:

year - the year of cutover

mode - 'u' - cutover is measured against UTC, 'w' - against wall offset, 's' - against standard offset

monthOfYear - the month from 1 (January) to 12 (December)

dayOfMonth - if negative, set to ((last day of month) - ~dayOfMonth). For example, if -1, set to last day of month

dayOfWeek - from 1 (Monday) to 7 (Sunday), if 0 then ignore

advanceDayOfWeek - if dayOfMonth does not fall on dayOfWeek, advance to dayOfWeek when true, retreat when false.

millisOfDay - additional precision for specifying time of day of cutover

setStandardOffset

public DateTimeZoneBuilder setStandardOffset(int standardOffset)

Sets the standard offset to use for newly added rules until the next cutover is added.

Parameters:

standardOffset - the standard offset in millis

setFixedSavings

public DateTimeZoneBuilder setFixedSavings(String nameKey,
                                           int saveMillis)

Set a fixed savings rule at the cutover.

addRecurringSavings

public DateTimeZoneBuilder addRecurringSavings(String nameKey,
                                               int saveMillis,
                                               int fromYear,
                                               int toYear,
                                               char mode,
                                               int monthOfYear,
                                               int dayOfMonth,
                                               int dayOfWeek,
                                               boolean advanceDayOfWeek,
                                               int millisOfDay)

Add a recurring daylight saving time rule.

Parameters:

nameKey - the name key of new rule

saveMillis - the milliseconds to add to standard offset

fromYear - the first year that rule is in effect, MIN_VALUE indicates beginning of time

toYear - the last year (inclusive) that rule is in effect, MAX_VALUE indicates end of time

mode - 'u' - transitions are calculated against UTC, 'w' - transitions are calculated against wall offset, 's' - transitions are calculated against standard offset

monthOfYear - the month from 1 (January) to 12 (December)

dayOfMonth - if negative, set to ((last day of month) - ~dayOfMonth). For example, if -1, set to last day of month

dayOfWeek - from 1 (Monday) to 7 (Sunday), if 0 then ignore

advanceDayOfWeek - if dayOfMonth does not fall on dayOfWeek, advance to dayOfWeek when true, retreat when false.

millisOfDay - additional precision for specifying time of day of transitions

toDateTimeZone

public DateTimeZone toDateTimeZone(String id,
                                   boolean outputID)

Processes all the rules and builds a DateTimeZone.

Parameters:

id - time zone id to assign

outputID - true if the zone id should be output

writeTo

public void writeTo(String zoneID,
                    OutputStream out)
             throws IOException

Encodes a built DateTimeZone to the given stream. Call readFrom to decode the data into a DateTimeZone object.

Parameters:

out - the output stream to receive the encoded DateTimeZone

Throws:

IOException

Since:

1.5 (parameter added)

writeTo

public void writeTo(String zoneID,
                    DataOutput out)
             throws IOException

Encodes a built DateTimeZone to the given stream. Call readFrom to decode the data into a DateTimeZone object.

Parameters:

out - the output stream to receive the encoded DateTimeZone

Throws:

IOException

Since:

1.5 (parameter added)