| /* |
| * Copyright (c) 2012, 2016, 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) 2011-2012, 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 java.io.DataOutput; |
| import java.io.IOException; |
| import java.io.ObjectOutput; |
| import java.time.LocalDateTime; |
| import java.time.LocalTime; |
| import java.time.ZoneOffset; |
| import java.time.zone.ZoneOffsetTransition; |
| import java.time.zone.ZoneOffsetTransitionRule; |
| import java.time.zone.ZoneOffsetTransitionRule.TimeDefinition; |
| import java.util.Arrays; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * Duplicated code of javax.time.zone.ZoneRules, ZoneOffsetTransitionRule |
| * and Ser to generate the serialization form output of ZoneRules for |
| * tzdb.jar. |
| * |
| * Implementation here is the copy/paste of ZoneRules, ZoneOffsetTransitionRule |
| * and Ser in javax.time.zone package. Make sure the code here is synchrionozed |
| * with the serialization implementation there. |
| * |
| * @since 1.8 |
| */ |
| |
| final class ZoneRules { |
| |
| /** |
| * The transitions between standard offsets (epoch seconds), sorted. |
| */ |
| private final long[] standardTransitions; |
| /** |
| * The standard offsets. |
| */ |
| private final ZoneOffset[] standardOffsets; |
| /** |
| * The transitions between instants (epoch seconds), sorted. |
| */ |
| private final long[] savingsInstantTransitions; |
| |
| /** |
| * The wall offsets. |
| */ |
| private final ZoneOffset[] wallOffsets; |
| /** |
| * The last rule. |
| */ |
| private final ZoneOffsetTransitionRule[] lastRules; |
| |
| /** |
| * Creates an instance. |
| * |
| * @param baseStandardOffset the standard offset to use before legal rules were set, not null |
| * @param baseWallOffset the wall offset to use before legal rules were set, not null |
| * @param standardOffsetTransitionList the list of changes to the standard offset, not null |
| * @param transitionList the list of transitions, not null |
| * @param lastRules the recurring last rules, size 16 or less, not null |
| */ |
| ZoneRules(ZoneOffset baseStandardOffset, |
| ZoneOffset baseWallOffset, |
| List<ZoneOffsetTransition> standardOffsetTransitionList, |
| List<ZoneOffsetTransition> transitionList, |
| List<ZoneOffsetTransitionRule> lastRules) { |
| |
| this.standardTransitions = new long[standardOffsetTransitionList.size()]; |
| |
| this.standardOffsets = new ZoneOffset[standardOffsetTransitionList.size() + 1]; |
| this.standardOffsets[0] = baseStandardOffset; |
| for (int i = 0; i < standardOffsetTransitionList.size(); i++) { |
| this.standardTransitions[i] = standardOffsetTransitionList.get(i).toEpochSecond(); |
| this.standardOffsets[i + 1] = standardOffsetTransitionList.get(i).getOffsetAfter(); |
| } |
| |
| // convert savings transitions to locals |
| List<ZoneOffset> localTransitionOffsetList = new ArrayList<>(); |
| localTransitionOffsetList.add(baseWallOffset); |
| for (ZoneOffsetTransition trans : transitionList) { |
| localTransitionOffsetList.add(trans.getOffsetAfter()); |
| } |
| |
| this.wallOffsets = localTransitionOffsetList.toArray(new ZoneOffset[localTransitionOffsetList.size()]); |
| |
| // convert savings transitions to instants |
| this.savingsInstantTransitions = new long[transitionList.size()]; |
| for (int i = 0; i < transitionList.size(); i++) { |
| this.savingsInstantTransitions[i] = transitionList.get(i).toEpochSecond(); |
| } |
| |
| // last rules |
| if (lastRules.size() > 16) { |
| throw new IllegalArgumentException("Too many transition rules"); |
| } |
| this.lastRules = lastRules.toArray(new ZoneOffsetTransitionRule[lastRules.size()]); |
| } |
| |
| /** Type for ZoneRules. */ |
| static final byte ZRULES = 1; |
| |
| /** |
| * 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 { |
| out.writeByte(ZRULES); |
| out.writeInt(standardTransitions.length); |
| for (long trans : standardTransitions) { |
| writeEpochSec(trans, out); |
| } |
| for (ZoneOffset offset : standardOffsets) { |
| writeOffset(offset, out); |
| } |
| out.writeInt(savingsInstantTransitions.length); |
| for (long trans : savingsInstantTransitions) { |
| writeEpochSec(trans, out); |
| } |
| for (ZoneOffset offset : wallOffsets) { |
| writeOffset(offset, out); |
| } |
| out.writeByte(lastRules.length); |
| for (ZoneOffsetTransitionRule rule : lastRules) { |
| writeRule(rule, out); |
| } |
| } |
| |
| /** |
| * Writes the state the ZoneOffset to the stream. |
| * |
| * @param offset the offset, not null |
| * @param out the output stream, not null |
| * @throws IOException if an error occurs |
| */ |
| static void writeOffset(ZoneOffset offset, DataOutput out) throws IOException { |
| final int offsetSecs = offset.getTotalSeconds(); |
| int offsetByte = offsetSecs % 900 == 0 ? offsetSecs / 900 : 127; // compress to -72 to +72 |
| out.writeByte(offsetByte); |
| if (offsetByte == 127) { |
| out.writeInt(offsetSecs); |
| } |
| } |
| |
| /** |
| * Writes the epoch seconds to the stream. |
| * |
| * @param epochSec the epoch seconds, not null |
| * @param out the output stream, not null |
| * @throws IOException if an error occurs |
| */ |
| static void writeEpochSec(long epochSec, DataOutput out) throws IOException { |
| if (epochSec >= -4575744000L && epochSec < 10413792000L && epochSec % 900 == 0) { // quarter hours between 1825 and 2300 |
| int store = (int) ((epochSec + 4575744000L) / 900); |
| out.writeByte((store >>> 16) & 255); |
| out.writeByte((store >>> 8) & 255); |
| out.writeByte(store & 255); |
| } else { |
| out.writeByte(255); |
| out.writeLong(epochSec); |
| } |
| } |
| |
| /** |
| * Writes the state of the transition rule to the stream. |
| * |
| * @param rule the transition rule, not null |
| * @param out the output stream, not null |
| * @throws IOException if an error occurs |
| */ |
| static void writeRule(ZoneOffsetTransitionRule rule, DataOutput out) throws IOException { |
| int month = rule.getMonth().getValue(); |
| byte dom = (byte)rule.getDayOfMonthIndicator(); |
| int dow = (rule.getDayOfWeek() == null ? -1 : rule.getDayOfWeek().getValue()); |
| LocalTime time = rule.getLocalTime(); |
| boolean timeEndOfDay = rule.isMidnightEndOfDay(); |
| TimeDefinition timeDefinition = rule.getTimeDefinition(); |
| ZoneOffset standardOffset = rule.getStandardOffset(); |
| ZoneOffset offsetBefore = rule.getOffsetBefore(); |
| ZoneOffset offsetAfter = rule.getOffsetAfter(); |
| |
| int timeSecs = (timeEndOfDay ? 86400 : time.toSecondOfDay()); |
| int stdOffset = standardOffset.getTotalSeconds(); |
| int beforeDiff = offsetBefore.getTotalSeconds() - stdOffset; |
| int afterDiff = offsetAfter.getTotalSeconds() - stdOffset; |
| int timeByte = (timeSecs % 3600 == 0 ? (timeEndOfDay ? 24 : time.getHour()) : 31); |
| int stdOffsetByte = (stdOffset % 900 == 0 ? stdOffset / 900 + 128 : 255); |
| int beforeByte = (beforeDiff == 0 || beforeDiff == 1800 || beforeDiff == 3600 ? beforeDiff / 1800 : 3); |
| int afterByte = (afterDiff == 0 || afterDiff == 1800 || afterDiff == 3600 ? afterDiff / 1800 : 3); |
| int dowByte = (dow == -1 ? 0 : dow); |
| int b = (month << 28) + // 4 bytes |
| ((dom + 32) << 22) + // 6 bytes |
| (dowByte << 19) + // 3 bytes |
| (timeByte << 14) + // 5 bytes |
| (timeDefinition.ordinal() << 12) + // 2 bytes |
| (stdOffsetByte << 4) + // 8 bytes |
| (beforeByte << 2) + // 2 bytes |
| afterByte; // 2 bytes |
| 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()); |
| } |
| } |
| |
| /** |
| * Checks if this set of rules equals another. |
| * <p> |
| * Two rule sets are equal if they will always result in the same output |
| * for any given input instant or local date-time. |
| * Rules from two different groups may return false even if they are in fact the same. |
| * <p> |
| * This definition should result in implementations comparing their entire state. |
| * |
| * @param otherRules the other rules, null returns false |
| * @return true if this rules is the same as that specified |
| */ |
| @Override |
| public boolean equals(Object otherRules) { |
| if (this == otherRules) { |
| return true; |
| } |
| if (otherRules instanceof ZoneRules) { |
| ZoneRules other = (ZoneRules) otherRules; |
| return Arrays.equals(standardTransitions, other.standardTransitions) && |
| Arrays.equals(standardOffsets, other.standardOffsets) && |
| Arrays.equals(savingsInstantTransitions, other.savingsInstantTransitions) && |
| Arrays.equals(wallOffsets, other.wallOffsets) && |
| Arrays.equals(lastRules, other.lastRules); |
| } |
| return false; |
| } |
| |
| /** |
| * Returns a suitable hash code given the definition of {@code #equals}. |
| * |
| * @return the hash code |
| */ |
| @Override |
| public int hashCode() { |
| return Arrays.hashCode(standardTransitions) ^ |
| Arrays.hashCode(standardOffsets) ^ |
| Arrays.hashCode(savingsInstantTransitions) ^ |
| Arrays.hashCode(wallOffsets) ^ |
| Arrays.hashCode(lastRules); |
| } |
| |
| } |