Quelle ZoneInfoOld.java Sprache: JAVA

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*
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import java.io.IOException;
import java.io.ObjectInputStream;
import java.lang.ref.SoftReference;
import java.time.ZoneOffset;
import java.time.LocalDateTime;
import java.util.Arrays;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.SimpleTimeZone;
import java.util.TimeZone;

import sun.util.calendar.CalendarSystem;
import sun.util.calendar.CalendarDate;

/**
* <code>ZoneInfoOld</code> is an implementation subclass of {@link
* java.util.TimeZone TimeZone} that represents GMT offsets and
* daylight saving time transitions of a time zone.
* 
* The daylight saving time transitions are described in the {@link
* #transitions transitions} table consisting of a chronological
* sequence of transitions of GMT offset and/or daylight saving time
* changes. Since all transitions are represented in UTC, in theory,
* <code>ZoneInfoOld</code> can be used with any calendar systems except
* for the {@link #getOffset(int,int,int,int,int,int) getOffset}
* method that takes Gregorian calendar date fields.
* 
* This table covers transitions from 1900 until 2037 (as of version
* 1.4), Before 1900, it assumes that there was no daylight saving
* time and the <code>getOffset</code> methods always return the
* {@link #getRawOffset} value. No Local Mean Time is supported. If a
* specified date is beyond the transition table and this time zone is
* supposed to observe daylight saving time in 2037, it delegates
* operations to a {@link java.util.SimpleTimeZone SimpleTimeZone}
* object created using the daylight saving time schedule as of 2037.
* 
* The date items, transitions, GMT offset(s), etc. are read from a database
* file. See {@link ZoneInfoFile} for details.
* @see java.util.SimpleTimeZone
* @since 1.4
*/

public class ZoneInfoOld extends TimeZone {

 // The constants assume no leap seconds support.
 static final int SECOND_IN_MILLIS = 1000;
 static final int MINUTE_IN_MILLIS = SECOND_IN_MILLIS * 60;
 static final int HOUR_IN_MILLIS = MINUTE_IN_MILLIS * 60;
 static final int DAY_IN_MILLIS = HOUR_IN_MILLIS * 24;

 private static final int UTC_TIME = 0;
 private static final int STANDARD_TIME = 1;
 private static final int WALL_TIME = 2;

 private static final long OFFSET_MASK = 0x0fL;
 private static final long DST_MASK = 0xf0L;
 private static final int DST_NSHIFT = 4;
 // this bit field is reserved for abbreviation support
 private static final long ABBR_MASK = 0xf00L;
 private static final int TRANSITION_NSHIFT = 12;

 // Flag for supporting JDK backward compatible IDs, such as "EST".
 static final boolean USE_OLDMAPPING;
 static {
 String oldmapping = System.getProperty("sun.timezone.ids.oldmapping", "false").toLowerCase(Locale.ROOT);
 USE_OLDMAPPING = (oldmapping.equals("yes") || oldmapping.equals("true"));
 }

 // IDs having conflicting data between Olson and JDK 1.1
 static final String[] conflictingIDs = {
 "EST", "MST", "HST"
 };

 private static final CalendarSystem gcal = CalendarSystem.getGregorianCalendar();

 /**
 * The raw GMT offset in milliseconds between this zone and GMT.
 * Negative offsets are to the west of Greenwich. To obtain local
 * standard time, add the offset to GMT time.
 * @serial
 */
 int rawOffset;

 /**
 * Difference in milliseconds from the original GMT offset in case
 * the raw offset value has been modified by calling {@link
 * #setRawOffset}. The initial value is 0.
 * @serial
 */
 int rawOffsetDiff = 0;

 /**
 * A CRC32 value of all pairs of transition time (in milliseconds
 * in <code>long</code>) in local time and its GMT offset (in
 * seconds in <code>int</code>) in the chronological order. Byte
 * values of each <code>long</code> and <code>int</code> are taken
 * in the big endian order (i.e., MSB to LSB).
 * @serial
 */
 int checksum;

 /**
 * The amount of time in milliseconds saved during daylight saving
 * time. If <code>useDaylight</code> is false, this value is 0.
 * @serial
 */
 int dstSavings;

 /**
 * This array describes transitions of GMT offsets of this time
 * zone, including both raw offset changes and daylight saving
 * time changes.
 * A long integer consists of four bit fields.
 * <ul>
 * <li>The most significant 52-bit field represents transition
 * time in milliseconds from Gregorian January 1 1970, 00:00:00
 * GMT.</li>
 * <li>The next 4-bit field is reserved and must be 0.</li>
 * <li>The next 4-bit field is an index value to {@link #offsets
 * offsets[]} for the amount of daylight saving at the
 * transition. If this value is zero, it means that no daylight
 * saving, not the index value zero.</li>
 * <li>The least significant 4-bit field is an index value to
 * {@link #offsets offsets[]} for total GMT offset at the
 * transition.</li>
 * </ul>
 * If this time zone doesn't observe daylight saving time and has
 * never changed any GMT offsets in the past, this value is null.
 * @serial
 */
 long[] transitions;

 /**
 * This array holds all unique offset values in
 * milliseconds. Index values to this array are stored in the
 * transitions array elements.
 * @serial
 */
 int[] offsets;

 /**
 * SimpleTimeZone parameter values. It has to have either 8 for
 * {@link java.util.SimpleTimeZone#SimpleTimeZone(int, String,
 * int, int , int , int , int , int , int , int , int) the
 * 11-argument SimpleTimeZone constructor} or 10 for {@link
 * java.util.SimpleTimeZone#SimpleTimeZone(int, String, int, int,
 * int , int , int , int , int , int , int, int, int) the
 * 13-argument SimpleTimeZone constructor} parameters.
 * @serial
 */
 int[] simpleTimeZoneParams;

 /**
 * True if the raw GMT offset value would change after the time
 * zone data has been generated; false, otherwise. The default
 * value is false.
 * @serial
 */
 boolean willGMTOffsetChange = false;

 /**
 * True if the object has been modified after its instantiation.
 */
 transient private boolean dirty = false;

 private static final long serialVersionUID = 2653134537216586139L;

 /**
 * A constructor.
 */
 public ZoneInfoOld() {
 }

 /**
 * A Constructor for CustomID.
 */
 public ZoneInfoOld(String ID, int rawOffset) {
 this(ID, rawOffset, 0, 0, null, null, null, false);
 }

 /**
 * Constructs a ZoneInfoOld instance.
 *
 * @param ID time zone name
 * @param rawOffset GMT offset in milliseconds
 * @param dstSavings daylight saving value in milliseconds or 0
 * (zero) if this time zone doesn't observe Daylight Saving Time.
 * @param checksum CRC32 value with all transitions table entry
 * values
 * @param transitions transition table
 * @param offsets offset value table
 * @param simpleTimeZoneParams parameter values for constructing
 * SimpleTimeZone
 * @param willGMTOffsetChange the value of willGMTOffsetChange
 */
 ZoneInfoOld(String ID,
 int rawOffset,
 int dstSavings,
 int checksum,
 long[] transitions,
 int[] offsets,
 int[] simpleTimeZoneParams,
 boolean willGMTOffsetChange) {
 setID(ID);
 this.rawOffset = rawOffset;
 this.dstSavings = dstSavings;
 this.checksum = checksum;
 this.transitions = transitions;
 this.offsets = offsets;
 this.simpleTimeZoneParams = simpleTimeZoneParams;
 this.willGMTOffsetChange = willGMTOffsetChange;
 }

 /**
 * Returns the difference in milliseconds between local time and UTC
 * of given time, taking into account both the raw offset and the
 * effect of daylight savings.
 *
 * @param date the milliseconds in UTC
 * @return the milliseconds to add to UTC to get local wall time
 */
 public int getOffset(long date) {
 return getOffsets(date, null, UTC_TIME);
 }

 public int getOffsets(long utc, int[] offsets) {
 return getOffsets(utc, offsets, UTC_TIME);
 }

 public int getOffsetsByStandard(long standard, int[] offsets) {
 return getOffsets(standard, offsets, STANDARD_TIME);
 }

 public int getOffsetsByWall(long wall, int[] offsets) {
 return getOffsets(wall, offsets, WALL_TIME);
 }

 private int getOffsets(long date, int[] offsets, int type) {
 // if dst is never observed, there is no transition.
 if (transitions == null) {
 int offset = getLastRawOffset();
 if (offsets != null) {
 offsets[0] = offset;
 offsets[1] = 0;
 }
 return offset;
 }

 date -= rawOffsetDiff;
 int index = getTransitionIndex(date, type);

 // prior to the transition table, returns the raw offset.
 // FIXME: should support LMT.
 if (index < 0) {
 int offset = getLastRawOffset();
 if (offsets != null) {
 offsets[0] = offset;
 offsets[1] = 0;
 }
 return offset;
 }

 if (index < transitions.length) {
 long val = transitions[index];
 int offset = this.offsets[(int)(val & OFFSET_MASK)] + rawOffsetDiff;
 if (offsets != null) {
 int dst = (int)((val >>> DST_NSHIFT) & 0xfL);
 int save = (dst == 0) ? 0 : this.offsets[dst];
 offsets[0] = offset - save;
 offsets[1] = save;
 }
 return offset;
 }

 // beyond the transitions, delegate to SimpleTimeZone if there
 // is a rule; otherwise, return rawOffset.
 SimpleTimeZone tz = getLastRule();
 if (tz != null) {
 int rawoffset = tz.getRawOffset();
 long msec = date;
 if (type != UTC_TIME) {
 msec -= rawOffset;
 }
 int dstoffset = tz.getOffset(msec) - rawOffset;

 // Check if it's in a standard-to-daylight transition.
 if (dstoffset > 0 && tz.getOffset(msec - dstoffset) == rawoffset) {
 dstoffset = 0;
 }

 if (offsets != null) {
 offsets[0] = rawoffset;
 offsets[1] = dstoffset;
 }
 return rawoffset + dstoffset;
 }
 int offset = getLastRawOffset();
 if (offsets != null) {
 offsets[0] = offset;
 offsets[1] = 0;
 }
 return offset;
 }

 private int getTransitionIndex(long date, int type) {
 int low = 0;
 int high = transitions.length - 1;

 while (low <= high) {
 int mid = (low + high) / 2;
 long val = transitions[mid];
 long midVal = val >> TRANSITION_NSHIFT; // sign extended
 if (type != UTC_TIME) {
 midVal += offsets[(int)(val & OFFSET_MASK)]; // wall time
 }
 if (type == STANDARD_TIME) {
 int dstIndex = (int)((val >>> DST_NSHIFT) & 0xfL);
 if (dstIndex != 0) {
 midVal -= offsets[dstIndex]; // make it standard time
 }
 }

 if (midVal < date) {
 low = mid + 1;
 } else if (midVal > date) {
 high = mid - 1;
 } else {
 return mid;
 }
 }

 // if beyond the transitions, returns that index.
 if (low >= transitions.length) {
 return low;
 }
 return low - 1;
 }

 /**
 * Returns the difference in milliseconds between local time and
 * UTC, taking into account both the raw offset and the effect of
 * daylight savings, for the specified date and time. This method
 * assumes that the start and end month are distinct. This method
 * assumes a Gregorian calendar for calculations.
 * 
 * Note: In general, clients should use
 * {@link Calendar#ZONE_OFFSET Calendar.get(ZONE_OFFSET)} +
 * {@link Calendar#DST_OFFSET Calendar.get(DST_OFFSET)}
 * instead of calling this method.
 *
 * @param era The era of the given date. The value must be either
 * GregorianCalendar.AD or GregorianCalendar.BC.
 * @param year The year in the given date.
 * @param month The month in the given date. Month is 0-based. e.g.,
 * 0 for January.
 * @param day The day-in-month of the given date.
 * @param dayOfWeek The day-of-week of the given date.
 * @param millis The milliseconds in day in standard local time.
 * @return The milliseconds to add to UTC to get local time.
 */
 public int getOffset(int era, int year, int month, int day,
 int dayOfWeek, int milliseconds) {
 if (milliseconds < 0 || milliseconds >= DAY_IN_MILLIS) {
 throw new IllegalArgumentException();
 }

 if (era == java.util.GregorianCalendar.BC) { // BC
 year = 1 - year;
 } else if (era != java.util.GregorianCalendar.AD) {
 throw new IllegalArgumentException();
 }

 CalendarDate date = gcal.newCalendarDate(null);
 date.setDate(year, month + 1, day);
 if (gcal.validate(date) == false) {
 throw new IllegalArgumentException();
 }

 // bug-for-bug compatible argument checking
 if (dayOfWeek < java.util.GregorianCalendar.SUNDAY
 || dayOfWeek > java.util.GregorianCalendar.SATURDAY) {
 throw new IllegalArgumentException();
 }

 if (transitions == null) {
 return getLastRawOffset();
 }

 long dateInMillis = gcal.getTime(date) + milliseconds;
 dateInMillis -= (long) rawOffset; // make it UTC
 return getOffsets(dateInMillis, null, UTC_TIME);
 }

 /**
 * Sets the base time zone offset from GMT. This operation
 * modifies all the transitions of this ZoneInfoOld object, including
 * historical ones, if applicable.
 *
 * @param offsetMillis the base time zone offset to GMT.
 * @see getRawOffset
 */
 public synchronized void setRawOffset(int offsetMillis) {
 if (offsetMillis == rawOffset + rawOffsetDiff) {
 return;
 }
 rawOffsetDiff = offsetMillis - rawOffset;
 if (lastRule != null) {
 lastRule.setRawOffset(offsetMillis);
 }
 dirty = true;
 }

 /**
 * Returns the GMT offset of the current date. This GMT offset
 * value is not modified during Daylight Saving Time.
 *
 * @return the GMT offset value in milliseconds to add to UTC time
 * to get local standard time
 */
 public int getRawOffset() {
 if (!willGMTOffsetChange) {
 return rawOffset + rawOffsetDiff;
 }

 int[] offsets = new int[2];
 getOffsets(System.currentTimeMillis(), offsets, UTC_TIME);
 return offsets[0];
 }

 public boolean isDirty() {
 return dirty;
 }

 int getLastRawOffset() {
 return rawOffset + rawOffsetDiff;
 }

 /**
 * Queries if this time zone uses Daylight Saving Time in the last known rule.
 */
 public boolean useDaylightTime() {
 return (simpleTimeZoneParams != null);
 }

 @Override
 public boolean observesDaylightTime() {
 if (simpleTimeZoneParams != null) {
 return true;
 }
 if (transitions == null) {
 return false;
 }

 // Look up the transition table to see if it's in DST right
 // now or if there's any standard-to-daylight transition at
 // any future.
 long utc = System.currentTimeMillis() - rawOffsetDiff;
 int index = getTransitionIndex(utc, UTC_TIME);

 // before transitions in the transition table
 if (index < 0) {
 return false;
 }

 // the time is in the table range.
 for (int i = index; i < transitions.length; i++) {
 if ((transitions[i] & DST_MASK) != 0) {
 return true;
 }
 }
 // No further DST is observed.
 return false;
 }

 /**
 * Queries if the specified date is in Daylight Saving Time.
 */
 public boolean inDaylightTime(Date date) {
 if (date == null) {
 throw new NullPointerException();
 }

 if (transitions == null) {
 return false;
 }

 long utc = date.getTime() - rawOffsetDiff;
 int index = getTransitionIndex(utc, UTC_TIME);

 // before transitions in the transition table
 if (index < 0) {
 return false;
 }

 // the time is in the table range.
 if (index < transitions.length) {
 return (transitions[index] & DST_MASK) != 0;
 }

 // beyond the transition table
 SimpleTimeZone tz = getLastRule();
 if (tz != null) {
 return tz.inDaylightTime(date);
 }
 return false;
 }

 /**
 * Returns the amount of time in milliseconds that the clock is advanced
 * during daylight saving time is in effect in its last daylight saving time rule.
 *
 * @return the number of milliseconds the time is advanced with respect to
 * standard time when daylight saving time is in effect.
 */
 public int getDSTSavings() {
 return dstSavings;
 }

// /**
// * @return the last year in the transition table or -1 if this
// * time zone doesn't observe any daylight saving time.
// */
// public int getMaxTransitionYear() {
// if (transitions == null) {
// return -1;
// }
// long val = transitions[transitions.length - 1];
// int offset = this.offsets[(int)(val & OFFSET_MASK)] + rawOffsetDiff;
// val = (val >> TRANSITION_NSHIFT) + offset;
// CalendarDate lastDate = Gregorian.getCalendarDate(val);
// return lastDate.getYear();
// }

 /**
 * Returns a string representation of this time zone.
 * @return the string
 */
 public String toString() {
 return getClass().getName() +
 "[id=\"" + getID() + "\"" +
 ",offset=" + getLastRawOffset() +
 ",dstSavings=" + dstSavings +
 ",useDaylight=" + useDaylightTime() +
 ",transitions=" + ((transitions != null) ? transitions.length : 0) +
 ",lastRule=" + (lastRule == null ? getLastRuleInstance() : lastRule) +
 "]";
 }

 /**
 * Gets all available IDs supported in the Java run-time.
 *
 * @return an array of time zone IDs.
 */
 public static String[] getAvailableIDs() {
 List<String> idList = ZoneInfoFile.getZoneIDs();
 List<String> excluded = ZoneInfoFile.getExcludedZones();
 if (excluded != null) {
 // List all zones from the idList and excluded lists
 List<String> list = new ArrayList<>(idList.size() + excluded.size());
 list.addAll(idList);
 list.addAll(excluded);
 idList = list;
 }
 String[] ids = new String[idList.size()];
 return idList.toArray(ids);
 }

 /**
 * Gets all available IDs that have the same value as the
 * specified raw GMT offset.
 *
 * @param rawOffset the GMT offset in milliseconds. This
 * value should not include any daylight saving time.
 *
 * @return an array of time zone IDs.
 */
 public static String[] getAvailableIDs(int rawOffset) {
 String[] result;
 List<String> matched = new ArrayList<>();
 List<String> IDs = ZoneInfoFile.getZoneIDs();
 int[] rawOffsets = ZoneInfoFile.getRawOffsets();

 loop:
 for (int index = 0; index < rawOffsets.length; index++) {
 if (rawOffsets[index] == rawOffset) {
 byte[] indices = ZoneInfoFile.getRawOffsetIndices();
 for (int i = 0; i < indices.length; i++) {
 if (indices[i] == index) {
 matched.add(IDs.get(i++));
 while (i < indices.length && indices[i] == index) {
 matched.add(IDs.get(i++));
 }
 break loop;
 }
 }
 }
 }

 // We need to add any zones from the excluded zone list that
 // currently have the same GMT offset as the specified
 // rawOffset. The zones returned by this method may not be
 // correct as of return to the caller if any GMT offset
 // transition is happening during this GMT offset checking...
 List<String> excluded = ZoneInfoFile.getExcludedZones();
 if (excluded != null) {
 for (String id : excluded) {
 TimeZone zi = getTimeZone(id);
 if (zi != null && zi.getRawOffset() == rawOffset) {
 matched.add(id);
 }
 }
 }

 result = new String[matched.size()];
 matched.toArray(result);
 return result;
 }

 /**
 * Gets the ZoneInfoOld for the given ID.
 *
 * @param ID the ID for a ZoneInfoOld. See TimeZone for detail.
 *
 * @return the specified ZoneInfoOld object, or null if there is no
 * time zone of the ID.
 */
 public static TimeZone getTimeZone(String ID) {
 String givenID = null;

 /*
 * If old JDK compatibility is specified, get the old alias
 * name.
 */
 if (USE_OLDMAPPING) {
 String compatibleID = TzIDOldMapping.MAP.get(ID);
 if (compatibleID != null) {
 givenID = ID;
 ID = compatibleID;
 }
 }

 ZoneInfoOld zi = ZoneInfoFile.getZoneInfoOld(ID);
 if (zi == null) {
 // if we can't create an object for the ID, try aliases.
 try {
 Map<String, String> map = getAliasTable();
 String alias = ID;
 while ((alias = map.get(alias)) != null) {
 zi = ZoneInfoFile.getZoneInfoOld(alias);
 if (zi != null) {
 zi.setID(ID);
 zi = ZoneInfoFile.addToCache(ID, zi);
 zi = (ZoneInfoOld) zi.clone();
 break;
 }
 }
 } catch (Exception e) {
 // ignore exceptions
 }
 }

 if (givenID != null && zi != null) {
 zi.setID(givenID);
 }
 return zi;
 }

 private transient SimpleTimeZone lastRule;

 /**
 * Returns a SimpleTimeZone object representing the last GMT
 * offset and DST schedule or null if this time zone doesn't
 * observe DST.
 */
 synchronized SimpleTimeZone getLastRule() {
 if (lastRule == null) {
 lastRule = getLastRuleInstance();
 }
 return lastRule;
 }

 /**
 * Returns a SimpleTimeZone object that represents the last
 * known daylight saving time rules.
 *
 * @return a SimpleTimeZone object or null if this time zone
 * doesn't observe DST.
 */
 public SimpleTimeZone getLastRuleInstance() {
 if (simpleTimeZoneParams == null) {
 return null;
 }
 if (simpleTimeZoneParams.length == 10) {
 return new SimpleTimeZone(getLastRawOffset(), getID(),
 simpleTimeZoneParams[0],
 simpleTimeZoneParams[1],
 simpleTimeZoneParams[2],
 simpleTimeZoneParams[3],
 simpleTimeZoneParams[4],
 simpleTimeZoneParams[5],
 simpleTimeZoneParams[6],
 simpleTimeZoneParams[7],
 simpleTimeZoneParams[8],
 simpleTimeZoneParams[9],
 dstSavings);
 }
 return new SimpleTimeZone(getLastRawOffset(), getID(),
 simpleTimeZoneParams[0],
 simpleTimeZoneParams[1],
 simpleTimeZoneParams[2],
 simpleTimeZoneParams[3],
 simpleTimeZoneParams[4],
 simpleTimeZoneParams[5],
 simpleTimeZoneParams[6],
 simpleTimeZoneParams[7],
 dstSavings);
 }

 /**
 * Returns a copy of this <code>ZoneInfoOld</code>.
 */
 public Object clone() {
 ZoneInfoOld zi = (ZoneInfoOld) super.clone();
 zi.lastRule = null;
 return zi;
 }

 /**
 * Returns a hash code value calculated from the GMT offset and
 * transitions.
 * @return a hash code of this time zone
 */
 public int hashCode() {
 return getLastRawOffset() ^ checksum;
 }

 /**
 * Compares the equity of two ZoneInfoOld objects.
 *
 * @param obj the object to be compared with
 * @return true if given object is same as this ZoneInfoOld object,
 * false otherwise.
 */
 public boolean equals(Object obj) {
 if (this == obj) {
 return true;
 }
 if (!(obj instanceof ZoneInfoOld)) {
 return false;
 }
 ZoneInfoOld that = (ZoneInfoOld) obj;
 return (getID().equals(that.getID())
 && (getLastRawOffset() == that.getLastRawOffset())
 && (checksum == that.checksum));
 }

 /**
 * Returns true if this zone has the same raw GMT offset value and
 * transition table as another zone info. If the specified
 * TimeZone object is not a ZoneInfoOld instance, this method returns
 * true if the specified TimeZone object has the same raw GMT
 * offset value with no daylight saving time.
 *
 * @param other the ZoneInfoOld object to be compared with
 * @return true if the given <code>TimeZone</code> has the same
 * GMT offset and transition information; false, otherwise.
 */
 public boolean hasSameRules(TimeZone other) {
 if (this == other) {
 return true;
 }
 if (other == null) {
 return false;
 }
 if (!(other instanceof ZoneInfoOld)) {
 if (getRawOffset() != other.getRawOffset()) {
 return false;
 }
 // if both have the same raw offset and neither observes
 // DST, they have the same rule.
 if ((transitions == null)
 && (useDaylightTime() == false)
 && (other.useDaylightTime() == false)) {
 return true;
 }
 return false;
 }
 if (getLastRawOffset() != ((ZoneInfoOld)other).getLastRawOffset()) {
 return false;
 }
 return (checksum == ((ZoneInfoOld)other).checksum);
 }

 private static SoftReference<Map<String, String>> aliasTable;

 static Map<String, String> getCachedAliasTable() {
 Map<String, String> aliases = null;

 SoftReference<Map<String, String>> cache = aliasTable;
 if (cache != null) {
 aliases = cache.get();
 }
 return aliases;
 }

 /**
 * Returns a Map from alias time zone IDs to their standard
 * time zone IDs.
 *
 * @return the Map that holds the mappings from alias time zone IDs
 * to their standard time zone IDs, or null if
 * <code>ZoneInfoOldMappings</code> file is not available.
 */
 public synchronized static Map<String, String> getAliasTable() {
 Map<String, String> aliases = getCachedAliasTable();
 if (aliases == null) {
 aliases = ZoneInfoFile.getZoneAliases();
 if (aliases != null) {
 if (!USE_OLDMAPPING) {
 // Remove the conflicting IDs from the alias table.
 for (String key : conflictingIDs) {
 aliases.remove(key);
 }
 }
 aliasTable = new SoftReference<Map<String, String>>(aliases);
 }
 }
 return aliases;
 }

 private void readObject(ObjectInputStream stream)
 throws IOException, ClassNotFoundException {
 stream.defaultReadObject();
 // We don't know how this object from 1.4.x or earlier has
 // been mutated. So it should always be marked as `dirty'.
 dirty = true;
 }

 //////////////////////////////////////////////////////////////
 public boolean equalsTo(ZoneInfoOld other) {
 return (getID().equals(other.getID())
 && (getLastRawOffset() == other.getLastRawOffset())
 && (dstSavings == other.dstSavings)
 && (willGMTOffsetChange == other.willGMTOffsetChange)
 && (checksum == other.checksum)
 && equalsTransOffsets(other)
 && (Arrays.equals(simpleTimeZoneParams, other.simpleTimeZoneParams) ||
 getLastRule().equals(other.getLastRule())));
 }

 private boolean equalsTransOffsets(ZoneInfoOld other) {
 if (transitions == null) {
 return (other.transitions == null &&
 Arrays.equals(offsets, other.offsets));
 }
 if (other.transitions == null ||
 transitions.length != other.transitions.length) {
 return false;
 }
 // if offsets and other.offsets have different order
 // the last 4-bit in trans are different.
 for (int i = 0; i < transitions.length; i++) {
 long val = transitions[i];
 int dst = (int)((val >>> DST_NSHIFT) & 0xfL);
 int save = (dst == 0) ? 0 : offsets[dst] / 1000;
 int off = offsets[(int)(val & OFFSET_MASK)]/1000;
 long second = (val >> TRANSITION_NSHIFT)/1000;

 val = other.transitions[i];
 int dstO = (int)((val >>> DST_NSHIFT) & 0xfL);
 int saveO = (dstO == 0) ? 0 : other.offsets[dstO] / 1000;
 int offO = other.offsets[(int)(val & OFFSET_MASK)]/1000;
 long secondO = (val >> TRANSITION_NSHIFT)/1000;
 if ((dst == 0) != (dstO == 0) || save != saveO || off != offO || second != secondO)
 return false;
 }
 return true;
 }

 private int transToString(long val, int off_old, int[] offsets, StringBuilder sb) {
 int dst = (int)((val >>> DST_NSHIFT) & 0xfL);
 int save = (dst == 0) ? 0 : offsets[dst] / 1000;
 int off = offsets[(int)(val & OFFSET_MASK)]/1000;
 long second = (val >> TRANSITION_NSHIFT)/1000;
 ZoneOffset offset_old = ZoneOffset.ofTotalSeconds(off_old);
 ZoneOffset offset = ZoneOffset.ofTotalSeconds(off);
 sb.append(" " + LocalDateTime.ofEpochSecond(second, 0, offset_old));

 sb.append(" [utc=" + second +
 " raw=" + Long.toHexString(val >> TRANSITION_NSHIFT) +
 ", offset=" + off + "/" + offset + ", saving=" + save + "]");
 return off;
 }

 public String diffsTo(ZoneInfoOld other) {

 int rawOffset0 = other.rawOffset;
 int checksum0 = other.checksum;
 int dstSavings0 = other.dstSavings;
 long[] transitions0 = other.transitions;
 int[] offsets0 = other.offsets;
 int[] simpleTimeZoneParams0 = other.simpleTimeZoneParams;
 boolean willGMTOffsetChange0 = other.willGMTOffsetChange;

 //return getClass().getName() +
 StringBuilder sb = new StringBuilder();
 sb.append("******************************\n" +
 getID() + " : " + other.getID());
 // ROC is excluded by ZoneInfoOld
 if ("ROC".equals(getID())) {
 return sb.toString();
 }
 if (rawOffset != rawOffset0 ||
 dstSavings != dstSavings0 ||
 checksum != checksum0 ||
 willGMTOffsetChange != willGMTOffsetChange0 ||
 (simpleTimeZoneParams != null ) != (simpleTimeZoneParams0 != null) ||
 (transitions != null && transitions0 != null &&
 transitions.length != transitions0.length))
 {
 sb.append("\n offset=" + getLastRawOffset() +
 ",dstSavings=" + dstSavings +
 ",useDaylight=" + useDaylightTime() +
 ",transitions=" + ((transitions != null) ? transitions.length : 0) +
 ",offsets=" + ((offsets != null) ? offsets.length : 0) +
 ",checksum=" + checksum +
 ",gmtChanged=" + willGMTOffsetChange)
 .append("\n[NG]offset=" + rawOffset0 +
 ",dstSavings=" + dstSavings0 +
 ",useDaylight=" + (simpleTimeZoneParams != null) +
 ",transitions=" + ((transitions0 != null) ? transitions0.length : 0) +
 ",offsets=" + ((offsets0 != null) ? offsets0.length : 0) +
 ",checksum=" + checksum0 +
 ",gmtChanged=" + willGMTOffsetChange0 +
 "");
 }
 // offsets
 if (!Arrays.equals(offsets, offsets0)) {
 sb.append("\n offset.len=" + ((offsets != null)? offsets.length : "null") +
 " " + ((offsets0 != null)? offsets0.length : "null"));
 if (offsets != null && offsets0.length != 0) {
 int len = Math.min(offsets.length, offsets0.length);
 int i = 0;
 for (i = 0; i < len; i++) {
 sb.append("\n " +
 ZoneOffset.ofTotalSeconds(offsets[i]/1000) + " " +
 ZoneOffset.ofTotalSeconds(offsets0[i]/1000));
 }
 for (; i < offsets0.length; i++) {
 sb.append("\n " + ZoneOffset.ofTotalSeconds(offsets0[i]/1000));
 }
 }
 }
 // trans
 int offset = 0;
 int offset0 = 0;
 if (!equalsTransOffsets(other)) {
 sb.append("\n -------------");
 if ((transitions == null) != (transitions0 == null)) {
 sb.append("\n (NG) Different trans(null) :" +
 transitions + ", " + transitions0);
 if (transitions != null) {
 for (int i = 0; i < transitions.length; i++) {
 sb.append("\n (NG)");
 offset = transToString(transitions[i], offset, offsets, sb);
 }
 }
 } else {
 if (transitions.length != transitions0.length) {
 sb.append("\n (NG) Different trans size :" +
 transitions.length + ", " + transitions0.length);
 }
 int length = Math.min(transitions.length, transitions0.length);
 for (int i = 0; i < length; i++) {
 // sb.append("\n[" + i + "] ");
 // offset = transToString(transitions[i], offset, offsets, sb);
 long val = transitions[i];
 int dst = (int)((val >>> DST_NSHIFT) & 0xfL);
 int save = (dst == 0) ? 0 : offsets[dst] / 1000;
 int off = offsets[(int)(val & OFFSET_MASK)]/1000;
 long second = (val >> TRANSITION_NSHIFT)/1000;
 sb.append("\n ");
 offset = transToString(transitions[i], offset, offsets, sb);
 if (transitions0 == null || i >= transitions0.length) {
 sb.append("\n ");
 offset = transToString(transitions[i], offset, offsets, sb);
 sb.append("\n (NG) trans0 is null or < trans.length");
 } else {
 long val0 = transitions0[i];
 int dst0 = (int)((val0 >>> DST_NSHIFT) & 0xfL);
 int save0 = (dst0 == 0) ? 0 : offsets0[dst0] / 1000;
 int off0 = offsets0[(int)(val0 & OFFSET_MASK)]/1000;
 long second0 = (val0 >> TRANSITION_NSHIFT)/1000;
 if (save != save0 || off != off0 || second != second0) {
 sb.append("\n (NG)");
 } else {
 sb.append("\n (OK)");
 }
 offset0 = transToString(transitions0[i], offset0, offsets0, sb);
 sb.append("\n -----");
 }
 }
 }
 }
 SimpleTimeZone stz = getLastRuleInstance();
 if (stz != null) {
 SimpleTimeZone stz0 = other.getLastRule();
 if (!stz.hasSameRules(stz0)) {
 sb.append("\n -------------")
 .append("\n SimpleTimeZone (NG)")
 .append("\n stz=" + stz)
 .append("\n stz0=" + stz0);
 }
 }
 sb.append("\n -------------");
 return sb.toString();
 }
}

Messung V0.5 in Prozent

¤ Dauer der Verarbeitung: 0.23 Sekunden (vorverarbeitet am 2026-10-11) ¤

Wurzel

Suchen

PVS Prover

Isabelle Prover

NIST Cobol Testsuite

Cephes Mathematical Library

Vienna Development Method

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