| /* |
| * 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 build.tools.tzdb; |
| |
| import static build.tools.tzdb.Utils.*; |
| 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: |
| * <p><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><p> |
| * These different rule types can be expressed and queried. |
| * |
| * <h3>Specification for implementors</h3> |
| * This class is immutable and thread-safe. |
| * |
| * @since 1.8 |
| */ |
| final class ZoneOffsetTransitionRule { |
| |
| /** |
| * The month of the month-day of the first day of the cutover week. |
| * The actual date will be adjusted by the dowChange field. |
| */ |
| final int 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. |
| */ |
| final byte dom; |
| /** |
| * The cutover day-of-week, -1 to retain the day-of-month. |
| */ |
| final int dow; |
| /** |
| * The cutover time in the 'before' offset. |
| */ |
| final LocalTime time; |
| /** |
| * Whether the cutover time is midnight at the end of day. |
| */ |
| final boolean timeEndOfDay; |
| /** |
| * The definition of how the local time should be interpreted. |
| */ |
| final TimeDefinition timeDefinition; |
| /** |
| * The standard offset at the cutover. |
| */ |
| final ZoneOffset standardOffset; |
| /** |
| * The offset before the cutover. |
| */ |
| final ZoneOffset offsetBefore; |
| /** |
| * The offset after the cutover. |
| */ |
| final ZoneOffset 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, from 1 to 12 |
| * @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, -1 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( |
| int month, |
| int dayOfMonthIndicator, |
| int dayOfWeek, |
| LocalTime time, |
| boolean timeEndOfDay, |
| TimeDefinition timeDefnition, |
| ZoneOffset standardOffset, |
| ZoneOffset offsetBefore, |
| ZoneOffset offsetAfter) { |
| Objects.requireNonNull(time, "time"); |
| Objects.requireNonNull(timeDefnition, "timeDefnition"); |
| Objects.requireNonNull(standardOffset, "standardOffset"); |
| Objects.requireNonNull(offsetBefore, "offsetBefore"); |
| Objects.requireNonNull(offsetAfter, "offsetAfter"); |
| if (month < 1 || month > 12) { |
| throw new IllegalArgumentException("month must be between 1 and 12"); |
| } |
| 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"); |
| } |
| 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; |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * 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 << 11) + ((dom + 32) << 5) + |
| ((dow == -1 ? 8 : dow) << 2) + (timeDefinition.ordinal()); |
| return hash ^ standardOffset.hashCode() ^ |
| offsetBefore.hashCode() ^ offsetAfter.hashCode(); |
| } |
| |
| } |
