| /* |
| * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * This file is available under and governed by the GNU General Public |
| * License version 2 only, as published by the Free Software Foundation. |
| * However, the following notice accompanied the original version of this |
| * file: |
| * |
| * Copyright (c) 2009-2012, Stephen Colebourne & Michael Nascimento Santos |
| * |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * |
| * * Redistributions of source code must retain the above copyright notice, |
| * this list of conditions and the following disclaimer. |
| * |
| * * Redistributions in binary form must reproduce the above copyright notice, |
| * this list of conditions and the following disclaimer in the documentation |
| * and/or other materials provided with the distribution. |
| * |
| * * Neither the name of JSR-310 nor the names of its contributors |
| * may be used to endorse or promote products derived from this software |
| * without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| package java.time.zone; |
| |
| import static java.time.temporal.TemporalAdjusters.nextOrSame; |
| import static java.time.temporal.TemporalAdjusters.previousOrSame; |
| |
| import java.io.DataInput; |
| import java.io.DataOutput; |
| import java.io.IOException; |
| import java.io.InvalidObjectException; |
| import java.io.ObjectInputStream; |
| import java.io.Serializable; |
| import java.time.DayOfWeek; |
| import java.time.LocalDate; |
| import java.time.LocalDateTime; |
| import java.time.LocalTime; |
| import java.time.Month; |
| import java.time.ZoneOffset; |
| import java.time.chrono.IsoChronology; |
| import java.util.Objects; |
| |
| /** |
| * A rule expressing how to create a transition. |
| * <p> |
| * This class allows rules for identifying future transitions to be expressed. |
| * A rule might be written in many forms: |
| * <ul> |
| * <li>the 16th March |
| * <li>the Sunday on or after the 16th March |
| * <li>the Sunday on or before the 16th March |
| * <li>the last Sunday in February |
| * </ul> |
| * These different rule types can be expressed and queried. |
| * |
| * @implSpec |
| * This class is immutable and thread-safe. |
| * |
| * @since 1.8 |
| */ |
| public final class ZoneOffsetTransitionRule implements Serializable { |
| |
| /** |
| * Serialization version. |
| */ |
| private static final long serialVersionUID = 6889046316657758795L; |
| |
| /** |
| * The month of the month-day of the first day of the cutover week. |
| * The actual date will be adjusted by the dowChange field. |
| */ |
| private final Month month; |
| /** |
| * The day-of-month of the month-day of the cutover week. |
| * If positive, it is the start of the week where the cutover can occur. |
| * If negative, it represents the end of the week where cutover can occur. |
| * The value is the number of days from the end of the month, such that |
| * {@code -1} is the last day of the month, {@code -2} is the second |
| * to last day, and so on. |
| */ |
| private final byte dom; |
| /** |
| * The cutover day-of-week, null to retain the day-of-month. |
| */ |
| private final DayOfWeek dow; |
| /** |
| * The cutover time in the 'before' offset. |
| */ |
| private final LocalTime time; |
| /** |
| * Whether the cutover time is midnight at the end of day. |
| */ |
| private final boolean timeEndOfDay; |
| /** |
| * The definition of how the local time should be interpreted. |
| */ |
| private final TimeDefinition timeDefinition; |
| /** |
| * The standard offset at the cutover. |
| */ |
| private final ZoneOffset standardOffset; |
| /** |
| * The offset before the cutover. |
| */ |
| private final ZoneOffset offsetBefore; |
| /** |
| * The offset after the cutover. |
| */ |
| private final ZoneOffset offsetAfter; |
| |
| /** |
| * Obtains an instance defining the yearly rule to create transitions between two offsets. |
| * <p> |
| * Applications should normally obtain an instance from {@link ZoneRules}. |
| * This factory is only intended for use when creating {@link ZoneRules}. |
| * |
| * @param month the month of the month-day of the first day of the cutover week, not null |
| * @param dayOfMonthIndicator the day of the month-day of the cutover week, positive if the week is that |
| * day or later, negative if the week is that day or earlier, counting from the last day of the month, |
| * from -28 to 31 excluding 0 |
| * @param dayOfWeek the required day-of-week, null if the month-day should not be changed |
| * @param time the cutover time in the 'before' offset, not null |
| * @param timeEndOfDay whether the time is midnight at the end of day |
| * @param timeDefnition how to interpret the cutover |
| * @param standardOffset the standard offset in force at the cutover, not null |
| * @param offsetBefore the offset before the cutover, not null |
| * @param offsetAfter the offset after the cutover, not null |
| * @return the rule, not null |
| * @throws IllegalArgumentException if the day of month indicator is invalid |
| * @throws IllegalArgumentException if the end of day flag is true when the time is not midnight |
| */ |
| public static ZoneOffsetTransitionRule of( |
| Month month, |
| int dayOfMonthIndicator, |
| DayOfWeek dayOfWeek, |
| LocalTime time, |
| boolean timeEndOfDay, |
| TimeDefinition timeDefnition, |
| ZoneOffset standardOffset, |
| ZoneOffset offsetBefore, |
| ZoneOffset offsetAfter) { |
| Objects.requireNonNull(month, "month"); |
| Objects.requireNonNull(time, "time"); |
| Objects.requireNonNull(timeDefnition, "timeDefnition"); |
| Objects.requireNonNull(standardOffset, "standardOffset"); |
| Objects.requireNonNull(offsetBefore, "offsetBefore"); |
| Objects.requireNonNull(offsetAfter, "offsetAfter"); |
| if (dayOfMonthIndicator < -28 || dayOfMonthIndicator > 31 || dayOfMonthIndicator == 0) { |
| throw new IllegalArgumentException("Day of month indicator must be between -28 and 31 inclusive excluding zero"); |
| } |
| if (timeEndOfDay && time.equals(LocalTime.MIDNIGHT) == false) { |
| throw new IllegalArgumentException("Time must be midnight when end of day flag is true"); |
| } |
| return new ZoneOffsetTransitionRule(month, dayOfMonthIndicator, dayOfWeek, time, timeEndOfDay, timeDefnition, standardOffset, offsetBefore, offsetAfter); |
| } |
| |
| /** |
| * Creates an instance defining the yearly rule to create transitions between two offsets. |
| * |
| * @param month the month of the month-day of the first day of the cutover week, not null |
| * @param dayOfMonthIndicator the day of the month-day of the cutover week, positive if the week is that |
| * day or later, negative if the week is that day or earlier, counting from the last day of the month, |
| * from -28 to 31 excluding 0 |
| * @param dayOfWeek the required day-of-week, null if the month-day should not be changed |
| * @param time the cutover time in the 'before' offset, not null |
| * @param timeEndOfDay whether the time is midnight at the end of day |
| * @param timeDefnition how to interpret the cutover |
| * @param standardOffset the standard offset in force at the cutover, not null |
| * @param offsetBefore the offset before the cutover, not null |
| * @param offsetAfter the offset after the cutover, not null |
| * @throws IllegalArgumentException if the day of month indicator is invalid |
| * @throws IllegalArgumentException if the end of day flag is true when the time is not midnight |
| */ |
| ZoneOffsetTransitionRule( |
| Month month, |
| int dayOfMonthIndicator, |
| DayOfWeek dayOfWeek, |
| LocalTime time, |
| boolean timeEndOfDay, |
| TimeDefinition timeDefnition, |
| ZoneOffset standardOffset, |
| ZoneOffset offsetBefore, |
| ZoneOffset offsetAfter) { |
| this.month = month; |
| this.dom = (byte) dayOfMonthIndicator; |
| this.dow = dayOfWeek; |
| this.time = time; |
| this.timeEndOfDay = timeEndOfDay; |
| this.timeDefinition = timeDefnition; |
| this.standardOffset = standardOffset; |
| this.offsetBefore = offsetBefore; |
| this.offsetAfter = offsetAfter; |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Defend against malicious streams. |
| * |
| * @param s the stream to read |
| * @throws InvalidObjectException always |
| */ |
| private void readObject(ObjectInputStream s) throws InvalidObjectException { |
| throw new InvalidObjectException("Deserialization via serialization delegate"); |
| } |
| |
| /** |
| * Writes the object using a |
| * <a href="../../../serialized-form.html#java.time.zone.Ser">dedicated serialized form</a>. |
| * @serialData |
| * Refer to the serialized form of |
| * <a href="../../../serialized-form.html#java.time.zone.ZoneRules">ZoneRules.writeReplace</a> |
| * for the encoding of epoch seconds and offsets. |
| * <pre style="font-size:1.0em">{@code |
| * |
| * out.writeByte(3); // identifies a ZoneOffsetTransition |
| * final int timeSecs = (timeEndOfDay ? 86400 : time.toSecondOfDay()); |
| * final int stdOffset = standardOffset.getTotalSeconds(); |
| * final int beforeDiff = offsetBefore.getTotalSeconds() - stdOffset; |
| * final int afterDiff = offsetAfter.getTotalSeconds() - stdOffset; |
| * final int timeByte = (timeSecs % 3600 == 0 ? (timeEndOfDay ? 24 : time.getHour()) : 31); |
| * final int stdOffsetByte = (stdOffset % 900 == 0 ? stdOffset / 900 + 128 : 255); |
| * final int beforeByte = (beforeDiff == 0 || beforeDiff == 1800 || beforeDiff == 3600 ? beforeDiff / 1800 : 3); |
| * final int afterByte = (afterDiff == 0 || afterDiff == 1800 || afterDiff == 3600 ? afterDiff / 1800 : 3); |
| * final int dowByte = (dow == null ? 0 : dow.getValue()); |
| * int b = (month.getValue() << 28) + // 4 bits |
| * ((dom + 32) << 22) + // 6 bits |
| * (dowByte << 19) + // 3 bits |
| * (timeByte << 14) + // 5 bits |
| * (timeDefinition.ordinal() << 12) + // 2 bits |
| * (stdOffsetByte << 4) + // 8 bits |
| * (beforeByte << 2) + // 2 bits |
| * afterByte; // 2 bits |
| * out.writeInt(b); |
| * if (timeByte == 31) { |
| * out.writeInt(timeSecs); |
| * } |
| * if (stdOffsetByte == 255) { |
| * out.writeInt(stdOffset); |
| * } |
| * if (beforeByte == 3) { |
| * out.writeInt(offsetBefore.getTotalSeconds()); |
| * } |
| * if (afterByte == 3) { |
| * out.writeInt(offsetAfter.getTotalSeconds()); |
| * } |
| * } |
| * </pre> |
| * |
| * @return the replacing object, not null |
| */ |
| private Object writeReplace() { |
| return new Ser(Ser.ZOTRULE, this); |
| } |
| |
| /** |
| * Writes the state to the stream. |
| * |
| * @param out the output stream, not null |
| * @throws IOException if an error occurs |
| */ |
| void writeExternal(DataOutput out) throws IOException { |
| final int timeSecs = (timeEndOfDay ? 86400 : time.toSecondOfDay()); |
| final int stdOffset = standardOffset.getTotalSeconds(); |
| final int beforeDiff = offsetBefore.getTotalSeconds() - stdOffset; |
| final int afterDiff = offsetAfter.getTotalSeconds() - stdOffset; |
| final int timeByte = (timeSecs % 3600 == 0 ? (timeEndOfDay ? 24 : time.getHour()) : 31); |
| final int stdOffsetByte = (stdOffset % 900 == 0 ? stdOffset / 900 + 128 : 255); |
| final int beforeByte = (beforeDiff == 0 || beforeDiff == 1800 || beforeDiff == 3600 ? beforeDiff / 1800 : 3); |
| final int afterByte = (afterDiff == 0 || afterDiff == 1800 || afterDiff == 3600 ? afterDiff / 1800 : 3); |
| final int dowByte = (dow == null ? 0 : dow.getValue()); |
| int b = (month.getValue() << 28) + // 4 bits |
| ((dom + 32) << 22) + // 6 bits |
| (dowByte << 19) + // 3 bits |
| (timeByte << 14) + // 5 bits |
| (timeDefinition.ordinal() << 12) + // 2 bits |
| (stdOffsetByte << 4) + // 8 bits |
| (beforeByte << 2) + // 2 bits |
| afterByte; // 2 bits |
| out.writeInt(b); |
| if (timeByte == 31) { |
| out.writeInt(timeSecs); |
| } |
| if (stdOffsetByte == 255) { |
| out.writeInt(stdOffset); |
| } |
| if (beforeByte == 3) { |
| out.writeInt(offsetBefore.getTotalSeconds()); |
| } |
| if (afterByte == 3) { |
| out.writeInt(offsetAfter.getTotalSeconds()); |
| } |
| } |
| |
| /** |
| * Reads the state from the stream. |
| * |
| * @param in the input stream, not null |
| * @return the created object, not null |
| * @throws IOException if an error occurs |
| */ |
| static ZoneOffsetTransitionRule readExternal(DataInput in) throws IOException { |
| int data = in.readInt(); |
| Month month = Month.of(data >>> 28); |
| int dom = ((data & (63 << 22)) >>> 22) - 32; |
| int dowByte = (data & (7 << 19)) >>> 19; |
| DayOfWeek dow = dowByte == 0 ? null : DayOfWeek.of(dowByte); |
| int timeByte = (data & (31 << 14)) >>> 14; |
| TimeDefinition defn = TimeDefinition.values()[(data & (3 << 12)) >>> 12]; |
| int stdByte = (data & (255 << 4)) >>> 4; |
| int beforeByte = (data & (3 << 2)) >>> 2; |
| int afterByte = (data & 3); |
| LocalTime time = (timeByte == 31 ? LocalTime.ofSecondOfDay(in.readInt()) : LocalTime.of(timeByte % 24, 0)); |
| ZoneOffset std = (stdByte == 255 ? ZoneOffset.ofTotalSeconds(in.readInt()) : ZoneOffset.ofTotalSeconds((stdByte - 128) * 900)); |
| ZoneOffset before = (beforeByte == 3 ? ZoneOffset.ofTotalSeconds(in.readInt()) : ZoneOffset.ofTotalSeconds(std.getTotalSeconds() + beforeByte * 1800)); |
| ZoneOffset after = (afterByte == 3 ? ZoneOffset.ofTotalSeconds(in.readInt()) : ZoneOffset.ofTotalSeconds(std.getTotalSeconds() + afterByte * 1800)); |
| return ZoneOffsetTransitionRule.of(month, dom, dow, time, timeByte == 24, defn, std, before, after); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Gets the month of the transition. |
| * <p> |
| * If the rule defines an exact date then the month is the month of that date. |
| * <p> |
| * If the rule defines a week where the transition might occur, then the month |
| * if the month of either the earliest or latest possible date of the cutover. |
| * |
| * @return the month of the transition, not null |
| */ |
| public Month getMonth() { |
| return month; |
| } |
| |
| /** |
| * Gets the indicator of the day-of-month of the transition. |
| * <p> |
| * If the rule defines an exact date then the day is the month of that date. |
| * <p> |
| * If the rule defines a week where the transition might occur, then the day |
| * defines either the start of the end of the transition week. |
| * <p> |
| * If the value is positive, then it represents a normal day-of-month, and is the |
| * earliest possible date that the transition can be. |
| * The date may refer to 29th February which should be treated as 1st March in non-leap years. |
| * <p> |
| * If the value is negative, then it represents the number of days back from the |
| * end of the month where {@code -1} is the last day of the month. |
| * In this case, the day identified is the latest possible date that the transition can be. |
| * |
| * @return the day-of-month indicator, from -28 to 31 excluding 0 |
| */ |
| public int getDayOfMonthIndicator() { |
| return dom; |
| } |
| |
| /** |
| * Gets the day-of-week of the transition. |
| * <p> |
| * If the rule defines an exact date then this returns null. |
| * <p> |
| * If the rule defines a week where the cutover might occur, then this method |
| * returns the day-of-week that the month-day will be adjusted to. |
| * If the day is positive then the adjustment is later. |
| * If the day is negative then the adjustment is earlier. |
| * |
| * @return the day-of-week that the transition occurs, null if the rule defines an exact date |
| */ |
| public DayOfWeek getDayOfWeek() { |
| return dow; |
| } |
| |
| /** |
| * Gets the local time of day of the transition which must be checked with |
| * {@link #isMidnightEndOfDay()}. |
| * <p> |
| * The time is converted into an instant using the time definition. |
| * |
| * @return the local time of day of the transition, not null |
| */ |
| public LocalTime getLocalTime() { |
| return time; |
| } |
| |
| /** |
| * Is the transition local time midnight at the end of day. |
| * <p> |
| * The transition may be represented as occurring at 24:00. |
| * |
| * @return whether a local time of midnight is at the start or end of the day |
| */ |
| public boolean isMidnightEndOfDay() { |
| return timeEndOfDay; |
| } |
| |
| /** |
| * Gets the time definition, specifying how to convert the time to an instant. |
| * <p> |
| * The local time can be converted to an instant using the standard offset, |
| * the wall offset or UTC. |
| * |
| * @return the time definition, not null |
| */ |
| public TimeDefinition getTimeDefinition() { |
| return timeDefinition; |
| } |
| |
| /** |
| * Gets the standard offset in force at the transition. |
| * |
| * @return the standard offset, not null |
| */ |
| public ZoneOffset getStandardOffset() { |
| return standardOffset; |
| } |
| |
| /** |
| * Gets the offset before the transition. |
| * |
| * @return the offset before, not null |
| */ |
| public ZoneOffset getOffsetBefore() { |
| return offsetBefore; |
| } |
| |
| /** |
| * Gets the offset after the transition. |
| * |
| * @return the offset after, not null |
| */ |
| public ZoneOffset getOffsetAfter() { |
| return offsetAfter; |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Creates a transition instance for the specified year. |
| * <p> |
| * Calculations are performed using the ISO-8601 chronology. |
| * |
| * @param year the year to create a transition for, not null |
| * @return the transition instance, not null |
| */ |
| public ZoneOffsetTransition createTransition(int year) { |
| LocalDate date; |
| if (dom < 0) { |
| date = LocalDate.of(year, month, month.length(IsoChronology.INSTANCE.isLeapYear(year)) + 1 + dom); |
| if (dow != null) { |
| date = date.with(previousOrSame(dow)); |
| } |
| } else { |
| date = LocalDate.of(year, month, dom); |
| if (dow != null) { |
| date = date.with(nextOrSame(dow)); |
| } |
| } |
| if (timeEndOfDay) { |
| date = date.plusDays(1); |
| } |
| LocalDateTime localDT = LocalDateTime.of(date, time); |
| LocalDateTime transition = timeDefinition.createDateTime(localDT, standardOffset, offsetBefore); |
| return new ZoneOffsetTransition(transition, offsetBefore, offsetAfter); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Checks if this object equals another. |
| * <p> |
| * The entire state of the object is compared. |
| * |
| * @param otherRule the other object to compare to, null returns false |
| * @return true if equal |
| */ |
| @Override |
| public boolean equals(Object otherRule) { |
| if (otherRule == this) { |
| return true; |
| } |
| if (otherRule instanceof ZoneOffsetTransitionRule) { |
| ZoneOffsetTransitionRule other = (ZoneOffsetTransitionRule) otherRule; |
| return month == other.month && dom == other.dom && dow == other.dow && |
| timeDefinition == other.timeDefinition && |
| time.equals(other.time) && |
| timeEndOfDay == other.timeEndOfDay && |
| standardOffset.equals(other.standardOffset) && |
| offsetBefore.equals(other.offsetBefore) && |
| offsetAfter.equals(other.offsetAfter); |
| } |
| return false; |
| } |
| |
| /** |
| * Returns a suitable hash code. |
| * |
| * @return the hash code |
| */ |
| @Override |
| public int hashCode() { |
| int hash = ((time.toSecondOfDay() + (timeEndOfDay ? 1 : 0)) << 15) + |
| (month.ordinal() << 11) + ((dom + 32) << 5) + |
| ((dow == null ? 7 : dow.ordinal()) << 2) + (timeDefinition.ordinal()); |
| return hash ^ standardOffset.hashCode() ^ |
| offsetBefore.hashCode() ^ offsetAfter.hashCode(); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Returns a string describing this object. |
| * |
| * @return a string for debugging, not null |
| */ |
| @Override |
| public String toString() { |
| StringBuilder buf = new StringBuilder(); |
| buf.append("TransitionRule[") |
| .append(offsetBefore.compareTo(offsetAfter) > 0 ? "Gap " : "Overlap ") |
| .append(offsetBefore).append(" to ").append(offsetAfter).append(", "); |
| if (dow != null) { |
| if (dom == -1) { |
| buf.append(dow.name()).append(" on or before last day of ").append(month.name()); |
| } else if (dom < 0) { |
| buf.append(dow.name()).append(" on or before last day minus ").append(-dom - 1).append(" of ").append(month.name()); |
| } else { |
| buf.append(dow.name()).append(" on or after ").append(month.name()).append(' ').append(dom); |
| } |
| } else { |
| buf.append(month.name()).append(' ').append(dom); |
| } |
| buf.append(" at ").append(timeEndOfDay ? "24:00" : time.toString()) |
| .append(" ").append(timeDefinition) |
| .append(", standard offset ").append(standardOffset) |
| .append(']'); |
| return buf.toString(); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * A definition of the way a local time can be converted to the actual |
| * transition date-time. |
| * <p> |
| * Time zone rules are expressed in one of three ways: |
| * <ul> |
| * <li>Relative to UTC</li> |
| * <li>Relative to the standard offset in force</li> |
| * <li>Relative to the wall offset (what you would see on a clock on the wall)</li> |
| * </ul> |
| */ |
| public static enum TimeDefinition { |
| /** The local date-time is expressed in terms of the UTC offset. */ |
| UTC, |
| /** The local date-time is expressed in terms of the wall offset. */ |
| WALL, |
| /** The local date-time is expressed in terms of the standard offset. */ |
| STANDARD; |
| |
| /** |
| * Converts the specified local date-time to the local date-time actually |
| * seen on a wall clock. |
| * <p> |
| * This method converts using the type of this enum. |
| * The output is defined relative to the 'before' offset of the transition. |
| * <p> |
| * The UTC type uses the UTC offset. |
| * The STANDARD type uses the standard offset. |
| * The WALL type returns the input date-time. |
| * The result is intended for use with the wall-offset. |
| * |
| * @param dateTime the local date-time, not null |
| * @param standardOffset the standard offset, not null |
| * @param wallOffset the wall offset, not null |
| * @return the date-time relative to the wall/before offset, not null |
| */ |
| public LocalDateTime createDateTime(LocalDateTime dateTime, ZoneOffset standardOffset, ZoneOffset wallOffset) { |
| switch (this) { |
| case UTC: { |
| int difference = wallOffset.getTotalSeconds() - ZoneOffset.UTC.getTotalSeconds(); |
| return dateTime.plusSeconds(difference); |
| } |
| case STANDARD: { |
| int difference = wallOffset.getTotalSeconds() - standardOffset.getTotalSeconds(); |
| return dateTime.plusSeconds(difference); |
| } |
| default: // WALL |
| return dateTime; |
| } |
| } |
| } |
| |
| } |