| /* |
| * Copyright (c) 2012, 2015, 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) 2007-2012, 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; |
| |
| import static java.time.LocalTime.NANOS_PER_SECOND; |
| import static java.time.LocalTime.SECONDS_PER_DAY; |
| import static java.time.LocalTime.SECONDS_PER_HOUR; |
| import static java.time.LocalTime.SECONDS_PER_MINUTE; |
| import static java.time.temporal.ChronoField.NANO_OF_SECOND; |
| import static java.time.temporal.ChronoUnit.DAYS; |
| import static java.time.temporal.ChronoUnit.NANOS; |
| import static java.time.temporal.ChronoUnit.SECONDS; |
| |
| 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.math.BigDecimal; |
| import java.math.BigInteger; |
| import java.math.RoundingMode; |
| import java.time.format.DateTimeParseException; |
| import java.time.temporal.ChronoField; |
| import java.time.temporal.ChronoUnit; |
| import java.time.temporal.Temporal; |
| import java.time.temporal.TemporalAmount; |
| import java.time.temporal.TemporalUnit; |
| import java.time.temporal.UnsupportedTemporalTypeException; |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.Objects; |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| |
| // Android-changed: removed ValueBased paragraph. |
| /** |
| * A time-based amount of time, such as '34.5 seconds'. |
| * <p> |
| * This class models a quantity or amount of time in terms of seconds and nanoseconds. |
| * It can be accessed using other duration-based units, such as minutes and hours. |
| * In addition, the {@link ChronoUnit#DAYS DAYS} unit can be used and is treated as |
| * exactly equal to 24 hours, thus ignoring daylight savings effects. |
| * See {@link Period} for the date-based equivalent to this class. |
| * <p> |
| * A physical duration could be of infinite length. |
| * For practicality, the duration is stored with constraints similar to {@link Instant}. |
| * The duration uses nanosecond resolution with a maximum value of the seconds that can |
| * be held in a {@code long}. This is greater than the current estimated age of the universe. |
| * <p> |
| * The range of a duration requires the storage of a number larger than a {@code long}. |
| * To achieve this, the class stores a {@code long} representing seconds and an {@code int} |
| * representing nanosecond-of-second, which will always be between 0 and 999,999,999. |
| * The model is of a directed duration, meaning that the duration may be negative. |
| * <p> |
| * The duration is measured in "seconds", but these are not necessarily identical to |
| * the scientific "SI second" definition based on atomic clocks. |
| * This difference only impacts durations measured near a leap-second and should not affect |
| * most applications. |
| * See {@link Instant} for a discussion as to the meaning of the second and time-scales. |
| * |
| * @implSpec |
| * This class is immutable and thread-safe. |
| * |
| * @since 1.8 |
| */ |
| public final class Duration |
| implements TemporalAmount, Comparable<Duration>, Serializable { |
| |
| /** |
| * Constant for a duration of zero. |
| */ |
| public static final Duration ZERO = new Duration(0, 0); |
| /** |
| * Serialization version. |
| */ |
| private static final long serialVersionUID = 3078945930695997490L; |
| /** |
| * Constant for nanos per second. |
| */ |
| private static final BigInteger BI_NANOS_PER_SECOND = BigInteger.valueOf(NANOS_PER_SECOND); |
| /** |
| * The pattern for parsing. |
| */ |
| private static final Pattern PATTERN = |
| Pattern.compile("([-+]?)P(?:([-+]?[0-9]+)D)?" + |
| "(T(?:([-+]?[0-9]+)H)?(?:([-+]?[0-9]+)M)?(?:([-+]?[0-9]+)(?:[.,]([0-9]{0,9}))?S)?)?", |
| Pattern.CASE_INSENSITIVE); |
| |
| /** |
| * The number of seconds in the duration. |
| */ |
| private final long seconds; |
| /** |
| * The number of nanoseconds in the duration, expressed as a fraction of the |
| * number of seconds. This is always positive, and never exceeds 999,999,999. |
| */ |
| private final int nanos; |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Obtains a {@code Duration} representing a number of standard 24 hour days. |
| * <p> |
| * The seconds are calculated based on the standard definition of a day, |
| * where each day is 86400 seconds which implies a 24 hour day. |
| * The nanosecond in second field is set to zero. |
| * |
| * @param days the number of days, positive or negative |
| * @return a {@code Duration}, not null |
| * @throws ArithmeticException if the input days exceeds the capacity of {@code Duration} |
| */ |
| public static Duration ofDays(long days) { |
| return create(Math.multiplyExact(days, SECONDS_PER_DAY), 0); |
| } |
| |
| /** |
| * Obtains a {@code Duration} representing a number of standard hours. |
| * <p> |
| * The seconds are calculated based on the standard definition of an hour, |
| * where each hour is 3600 seconds. |
| * The nanosecond in second field is set to zero. |
| * |
| * @param hours the number of hours, positive or negative |
| * @return a {@code Duration}, not null |
| * @throws ArithmeticException if the input hours exceeds the capacity of {@code Duration} |
| */ |
| public static Duration ofHours(long hours) { |
| return create(Math.multiplyExact(hours, SECONDS_PER_HOUR), 0); |
| } |
| |
| /** |
| * Obtains a {@code Duration} representing a number of standard minutes. |
| * <p> |
| * The seconds are calculated based on the standard definition of a minute, |
| * where each minute is 60 seconds. |
| * The nanosecond in second field is set to zero. |
| * |
| * @param minutes the number of minutes, positive or negative |
| * @return a {@code Duration}, not null |
| * @throws ArithmeticException if the input minutes exceeds the capacity of {@code Duration} |
| */ |
| public static Duration ofMinutes(long minutes) { |
| return create(Math.multiplyExact(minutes, SECONDS_PER_MINUTE), 0); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Obtains a {@code Duration} representing a number of seconds. |
| * <p> |
| * The nanosecond in second field is set to zero. |
| * |
| * @param seconds the number of seconds, positive or negative |
| * @return a {@code Duration}, not null |
| */ |
| public static Duration ofSeconds(long seconds) { |
| return create(seconds, 0); |
| } |
| |
| /** |
| * Obtains a {@code Duration} representing a number of seconds and an |
| * adjustment in nanoseconds. |
| * <p> |
| * This method allows an arbitrary number of nanoseconds to be passed in. |
| * The factory will alter the values of the second and nanosecond in order |
| * to ensure that the stored nanosecond is in the range 0 to 999,999,999. |
| * For example, the following will result in the exactly the same duration: |
| * <pre> |
| * Duration.ofSeconds(3, 1); |
| * Duration.ofSeconds(4, -999_999_999); |
| * Duration.ofSeconds(2, 1000_000_001); |
| * </pre> |
| * |
| * @param seconds the number of seconds, positive or negative |
| * @param nanoAdjustment the nanosecond adjustment to the number of seconds, positive or negative |
| * @return a {@code Duration}, not null |
| * @throws ArithmeticException if the adjustment causes the seconds to exceed the capacity of {@code Duration} |
| */ |
| public static Duration ofSeconds(long seconds, long nanoAdjustment) { |
| long secs = Math.addExact(seconds, Math.floorDiv(nanoAdjustment, NANOS_PER_SECOND)); |
| int nos = (int) Math.floorMod(nanoAdjustment, NANOS_PER_SECOND); |
| return create(secs, nos); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Obtains a {@code Duration} representing a number of milliseconds. |
| * <p> |
| * The seconds and nanoseconds are extracted from the specified milliseconds. |
| * |
| * @param millis the number of milliseconds, positive or negative |
| * @return a {@code Duration}, not null |
| */ |
| public static Duration ofMillis(long millis) { |
| long secs = millis / 1000; |
| int mos = (int) (millis % 1000); |
| if (mos < 0) { |
| mos += 1000; |
| secs--; |
| } |
| return create(secs, mos * 1000_000); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Obtains a {@code Duration} representing a number of nanoseconds. |
| * <p> |
| * The seconds and nanoseconds are extracted from the specified nanoseconds. |
| * |
| * @param nanos the number of nanoseconds, positive or negative |
| * @return a {@code Duration}, not null |
| */ |
| public static Duration ofNanos(long nanos) { |
| long secs = nanos / NANOS_PER_SECOND; |
| int nos = (int) (nanos % NANOS_PER_SECOND); |
| if (nos < 0) { |
| nos += NANOS_PER_SECOND; |
| secs--; |
| } |
| return create(secs, nos); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Obtains a {@code Duration} representing an amount in the specified unit. |
| * <p> |
| * The parameters represent the two parts of a phrase like '6 Hours'. For example: |
| * <pre> |
| * Duration.of(3, SECONDS); |
| * Duration.of(465, HOURS); |
| * </pre> |
| * Only a subset of units are accepted by this method. |
| * The unit must either have an {@linkplain TemporalUnit#isDurationEstimated() exact duration} or |
| * be {@link ChronoUnit#DAYS} which is treated as 24 hours. Other units throw an exception. |
| * |
| * @param amount the amount of the duration, measured in terms of the unit, positive or negative |
| * @param unit the unit that the duration is measured in, must have an exact duration, not null |
| * @return a {@code Duration}, not null |
| * @throws DateTimeException if the period unit has an estimated duration |
| * @throws ArithmeticException if a numeric overflow occurs |
| */ |
| public static Duration of(long amount, TemporalUnit unit) { |
| return ZERO.plus(amount, unit); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Obtains an instance of {@code Duration} from a temporal amount. |
| * <p> |
| * This obtains a duration based on the specified amount. |
| * A {@code TemporalAmount} represents an amount of time, which may be |
| * date-based or time-based, which this factory extracts to a duration. |
| * <p> |
| * The conversion loops around the set of units from the amount and uses |
| * the {@linkplain TemporalUnit#getDuration() duration} of the unit to |
| * calculate the total {@code Duration}. |
| * Only a subset of units are accepted by this method. The unit must either |
| * have an {@linkplain TemporalUnit#isDurationEstimated() exact duration} |
| * or be {@link ChronoUnit#DAYS} which is treated as 24 hours. |
| * If any other units are found then an exception is thrown. |
| * |
| * @param amount the temporal amount to convert, not null |
| * @return the equivalent duration, not null |
| * @throws DateTimeException if unable to convert to a {@code Duration} |
| * @throws ArithmeticException if numeric overflow occurs |
| */ |
| public static Duration from(TemporalAmount amount) { |
| Objects.requireNonNull(amount, "amount"); |
| Duration duration = ZERO; |
| for (TemporalUnit unit : amount.getUnits()) { |
| duration = duration.plus(amount.get(unit), unit); |
| } |
| return duration; |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Obtains a {@code Duration} from a text string such as {@code PnDTnHnMn.nS}. |
| * <p> |
| * This will parse a textual representation of a duration, including the |
| * string produced by {@code toString()}. The formats accepted are based |
| * on the ISO-8601 duration format {@code PnDTnHnMn.nS} with days |
| * considered to be exactly 24 hours. |
| * <p> |
| * The string starts with an optional sign, denoted by the ASCII negative |
| * or positive symbol. If negative, the whole period is negated. |
| * The ASCII letter "P" is next in upper or lower case. |
| * There are then four sections, each consisting of a number and a suffix. |
| * The sections have suffixes in ASCII of "D", "H", "M" and "S" for |
| * days, hours, minutes and seconds, accepted in upper or lower case. |
| * The suffixes must occur in order. The ASCII letter "T" must occur before |
| * the first occurrence, if any, of an hour, minute or second section. |
| * At least one of the four sections must be present, and if "T" is present |
| * there must be at least one section after the "T". |
| * The number part of each section must consist of one or more ASCII digits. |
| * The number may be prefixed by the ASCII negative or positive symbol. |
| * The number of days, hours and minutes must parse to an {@code long}. |
| * The number of seconds must parse to an {@code long} with optional fraction. |
| * The decimal point may be either a dot or a comma. |
| * The fractional part may have from zero to 9 digits. |
| * <p> |
| * The leading plus/minus sign, and negative values for other units are |
| * not part of the ISO-8601 standard. |
| * <p> |
| * Examples: |
| * <pre> |
| * "PT20.345S" -- parses as "20.345 seconds" |
| * "PT15M" -- parses as "15 minutes" (where a minute is 60 seconds) |
| * "PT10H" -- parses as "10 hours" (where an hour is 3600 seconds) |
| * "P2D" -- parses as "2 days" (where a day is 24 hours or 86400 seconds) |
| * "P2DT3H4M" -- parses as "2 days, 3 hours and 4 minutes" |
| * "P-6H3M" -- parses as "-6 hours and +3 minutes" |
| * "-P6H3M" -- parses as "-6 hours and -3 minutes" |
| * "-P-6H+3M" -- parses as "+6 hours and -3 minutes" |
| * </pre> |
| * |
| * @param text the text to parse, not null |
| * @return the parsed duration, not null |
| * @throws DateTimeParseException if the text cannot be parsed to a duration |
| */ |
| public static Duration parse(CharSequence text) { |
| Objects.requireNonNull(text, "text"); |
| Matcher matcher = PATTERN.matcher(text); |
| if (matcher.matches()) { |
| // check for letter T but no time sections |
| if ("T".equals(matcher.group(3)) == false) { |
| boolean negate = "-".equals(matcher.group(1)); |
| String dayMatch = matcher.group(2); |
| String hourMatch = matcher.group(4); |
| String minuteMatch = matcher.group(5); |
| String secondMatch = matcher.group(6); |
| String fractionMatch = matcher.group(7); |
| if (dayMatch != null || hourMatch != null || minuteMatch != null || secondMatch != null) { |
| long daysAsSecs = parseNumber(text, dayMatch, SECONDS_PER_DAY, "days"); |
| long hoursAsSecs = parseNumber(text, hourMatch, SECONDS_PER_HOUR, "hours"); |
| long minsAsSecs = parseNumber(text, minuteMatch, SECONDS_PER_MINUTE, "minutes"); |
| long seconds = parseNumber(text, secondMatch, 1, "seconds"); |
| int nanos = parseFraction(text, fractionMatch, seconds < 0 ? -1 : 1); |
| try { |
| return create(negate, daysAsSecs, hoursAsSecs, minsAsSecs, seconds, nanos); |
| } catch (ArithmeticException ex) { |
| throw (DateTimeParseException) new DateTimeParseException("Text cannot be parsed to a Duration: overflow", text, 0).initCause(ex); |
| } |
| } |
| } |
| } |
| throw new DateTimeParseException("Text cannot be parsed to a Duration", text, 0); |
| } |
| |
| private static long parseNumber(CharSequence text, String parsed, int multiplier, String errorText) { |
| // regex limits to [-+]?[0-9]+ |
| if (parsed == null) { |
| return 0; |
| } |
| try { |
| long val = Long.parseLong(parsed); |
| return Math.multiplyExact(val, multiplier); |
| } catch (NumberFormatException | ArithmeticException ex) { |
| throw (DateTimeParseException) new DateTimeParseException("Text cannot be parsed to a Duration: " + errorText, text, 0).initCause(ex); |
| } |
| } |
| |
| private static int parseFraction(CharSequence text, String parsed, int negate) { |
| // regex limits to [0-9]{0,9} |
| if (parsed == null || parsed.length() == 0) { |
| return 0; |
| } |
| try { |
| parsed = (parsed + "000000000").substring(0, 9); |
| return Integer.parseInt(parsed) * negate; |
| } catch (NumberFormatException | ArithmeticException ex) { |
| throw (DateTimeParseException) new DateTimeParseException("Text cannot be parsed to a Duration: fraction", text, 0).initCause(ex); |
| } |
| } |
| |
| private static Duration create(boolean negate, long daysAsSecs, long hoursAsSecs, long minsAsSecs, long secs, int nanos) { |
| long seconds = Math.addExact(daysAsSecs, Math.addExact(hoursAsSecs, Math.addExact(minsAsSecs, secs))); |
| if (negate) { |
| return ofSeconds(seconds, nanos).negated(); |
| } |
| return ofSeconds(seconds, nanos); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Obtains a {@code Duration} representing the duration between two temporal objects. |
| * <p> |
| * This calculates the duration between two temporal objects. If the objects |
| * are of different types, then the duration is calculated based on the type |
| * of the first object. For example, if the first argument is a {@code LocalTime} |
| * then the second argument is converted to a {@code LocalTime}. |
| * <p> |
| * The specified temporal objects must support the {@link ChronoUnit#SECONDS SECONDS} unit. |
| * For full accuracy, either the {@link ChronoUnit#NANOS NANOS} unit or the |
| * {@link ChronoField#NANO_OF_SECOND NANO_OF_SECOND} field should be supported. |
| * <p> |
| * The result of this method can be a negative period if the end is before the start. |
| * To guarantee to obtain a positive duration call {@link #abs()} on the result. |
| * |
| * @param startInclusive the start instant, inclusive, not null |
| * @param endExclusive the end instant, exclusive, not null |
| * @return a {@code Duration}, not null |
| * @throws DateTimeException if the seconds between the temporals cannot be obtained |
| * @throws ArithmeticException if the calculation exceeds the capacity of {@code Duration} |
| */ |
| public static Duration between(Temporal startInclusive, Temporal endExclusive) { |
| try { |
| return ofNanos(startInclusive.until(endExclusive, NANOS)); |
| } catch (DateTimeException | ArithmeticException ex) { |
| long secs = startInclusive.until(endExclusive, SECONDS); |
| long nanos; |
| try { |
| nanos = endExclusive.getLong(NANO_OF_SECOND) - startInclusive.getLong(NANO_OF_SECOND); |
| if (secs > 0 && nanos < 0) { |
| secs++; |
| } else if (secs < 0 && nanos > 0) { |
| secs--; |
| } |
| } catch (DateTimeException ex2) { |
| nanos = 0; |
| } |
| return ofSeconds(secs, nanos); |
| } |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Obtains an instance of {@code Duration} using seconds and nanoseconds. |
| * |
| * @param seconds the length of the duration in seconds, positive or negative |
| * @param nanoAdjustment the nanosecond adjustment within the second, from 0 to 999,999,999 |
| */ |
| private static Duration create(long seconds, int nanoAdjustment) { |
| if ((seconds | nanoAdjustment) == 0) { |
| return ZERO; |
| } |
| return new Duration(seconds, nanoAdjustment); |
| } |
| |
| /** |
| * Constructs an instance of {@code Duration} using seconds and nanoseconds. |
| * |
| * @param seconds the length of the duration in seconds, positive or negative |
| * @param nanos the nanoseconds within the second, from 0 to 999,999,999 |
| */ |
| private Duration(long seconds, int nanos) { |
| super(); |
| this.seconds = seconds; |
| this.nanos = nanos; |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Gets the value of the requested unit. |
| * <p> |
| * This returns a value for each of the two supported units, |
| * {@link ChronoUnit#SECONDS SECONDS} and {@link ChronoUnit#NANOS NANOS}. |
| * All other units throw an exception. |
| * |
| * @param unit the {@code TemporalUnit} for which to return the value |
| * @return the long value of the unit |
| * @throws DateTimeException if the unit is not supported |
| * @throws UnsupportedTemporalTypeException if the unit is not supported |
| */ |
| @Override |
| public long get(TemporalUnit unit) { |
| if (unit == SECONDS) { |
| return seconds; |
| } else if (unit == NANOS) { |
| return nanos; |
| } else { |
| throw new UnsupportedTemporalTypeException("Unsupported unit: " + unit); |
| } |
| } |
| |
| /** |
| * Gets the set of units supported by this duration. |
| * <p> |
| * The supported units are {@link ChronoUnit#SECONDS SECONDS}, |
| * and {@link ChronoUnit#NANOS NANOS}. |
| * They are returned in the order seconds, nanos. |
| * <p> |
| * This set can be used in conjunction with {@link #get(TemporalUnit)} |
| * to access the entire state of the duration. |
| * |
| * @return a list containing the seconds and nanos units, not null |
| */ |
| @Override |
| public List<TemporalUnit> getUnits() { |
| return DurationUnits.UNITS; |
| } |
| |
| /** |
| * Private class to delay initialization of this list until needed. |
| * The circular dependency between Duration and ChronoUnit prevents |
| * the simple initialization in Duration. |
| */ |
| private static class DurationUnits { |
| static final List<TemporalUnit> UNITS = |
| Collections.unmodifiableList(Arrays.<TemporalUnit>asList(SECONDS, NANOS)); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Checks if this duration is zero length. |
| * <p> |
| * A {@code Duration} represents a directed distance between two points on |
| * the time-line and can therefore be positive, zero or negative. |
| * This method checks whether the length is zero. |
| * |
| * @return true if this duration has a total length equal to zero |
| */ |
| public boolean isZero() { |
| return (seconds | nanos) == 0; |
| } |
| |
| /** |
| * Checks if this duration is negative, excluding zero. |
| * <p> |
| * A {@code Duration} represents a directed distance between two points on |
| * the time-line and can therefore be positive, zero or negative. |
| * This method checks whether the length is less than zero. |
| * |
| * @return true if this duration has a total length less than zero |
| */ |
| public boolean isNegative() { |
| return seconds < 0; |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Gets the number of seconds in this duration. |
| * <p> |
| * The length of the duration is stored using two fields - seconds and nanoseconds. |
| * The nanoseconds part is a value from 0 to 999,999,999 that is an adjustment to |
| * the length in seconds. |
| * The total duration is defined by calling this method and {@link #getNano()}. |
| * <p> |
| * A {@code Duration} represents a directed distance between two points on the time-line. |
| * A negative duration is expressed by the negative sign of the seconds part. |
| * A duration of -1 nanosecond is stored as -1 seconds plus 999,999,999 nanoseconds. |
| * |
| * @return the whole seconds part of the length of the duration, positive or negative |
| */ |
| public long getSeconds() { |
| return seconds; |
| } |
| |
| /** |
| * Gets the number of nanoseconds within the second in this duration. |
| * <p> |
| * The length of the duration is stored using two fields - seconds and nanoseconds. |
| * The nanoseconds part is a value from 0 to 999,999,999 that is an adjustment to |
| * the length in seconds. |
| * The total duration is defined by calling this method and {@link #getSeconds()}. |
| * <p> |
| * A {@code Duration} represents a directed distance between two points on the time-line. |
| * A negative duration is expressed by the negative sign of the seconds part. |
| * A duration of -1 nanosecond is stored as -1 seconds plus 999,999,999 nanoseconds. |
| * |
| * @return the nanoseconds within the second part of the length of the duration, from 0 to 999,999,999 |
| */ |
| public int getNano() { |
| return nanos; |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Returns a copy of this duration with the specified amount of seconds. |
| * <p> |
| * This returns a duration with the specified seconds, retaining the |
| * nano-of-second part of this duration. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @param seconds the seconds to represent, may be negative |
| * @return a {@code Duration} based on this period with the requested seconds, not null |
| */ |
| public Duration withSeconds(long seconds) { |
| return create(seconds, nanos); |
| } |
| |
| /** |
| * Returns a copy of this duration with the specified nano-of-second. |
| * <p> |
| * This returns a duration with the specified nano-of-second, retaining the |
| * seconds part of this duration. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @param nanoOfSecond the nano-of-second to represent, from 0 to 999,999,999 |
| * @return a {@code Duration} based on this period with the requested nano-of-second, not null |
| * @throws DateTimeException if the nano-of-second is invalid |
| */ |
| public Duration withNanos(int nanoOfSecond) { |
| NANO_OF_SECOND.checkValidIntValue(nanoOfSecond); |
| return create(seconds, nanoOfSecond); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Returns a copy of this duration with the specified duration added. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @param duration the duration to add, positive or negative, not null |
| * @return a {@code Duration} based on this duration with the specified duration added, not null |
| * @throws ArithmeticException if numeric overflow occurs |
| */ |
| public Duration plus(Duration duration) { |
| return plus(duration.getSeconds(), duration.getNano()); |
| } |
| |
| /** |
| * Returns a copy of this duration with the specified duration added. |
| * <p> |
| * The duration amount is measured in terms of the specified unit. |
| * Only a subset of units are accepted by this method. |
| * The unit must either have an {@linkplain TemporalUnit#isDurationEstimated() exact duration} or |
| * be {@link ChronoUnit#DAYS} which is treated as 24 hours. Other units throw an exception. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @param amountToAdd the amount to add, measured in terms of the unit, positive or negative |
| * @param unit the unit that the amount is measured in, must have an exact duration, not null |
| * @return a {@code Duration} based on this duration with the specified duration added, not null |
| * @throws UnsupportedTemporalTypeException if the unit is not supported |
| * @throws ArithmeticException if numeric overflow occurs |
| */ |
| public Duration plus(long amountToAdd, TemporalUnit unit) { |
| Objects.requireNonNull(unit, "unit"); |
| if (unit == DAYS) { |
| return plus(Math.multiplyExact(amountToAdd, SECONDS_PER_DAY), 0); |
| } |
| if (unit.isDurationEstimated()) { |
| throw new UnsupportedTemporalTypeException("Unit must not have an estimated duration"); |
| } |
| if (amountToAdd == 0) { |
| return this; |
| } |
| if (unit instanceof ChronoUnit) { |
| switch ((ChronoUnit) unit) { |
| case NANOS: return plusNanos(amountToAdd); |
| case MICROS: return plusSeconds((amountToAdd / (1000_000L * 1000)) * 1000).plusNanos((amountToAdd % (1000_000L * 1000)) * 1000); |
| case MILLIS: return plusMillis(amountToAdd); |
| case SECONDS: return plusSeconds(amountToAdd); |
| } |
| return plusSeconds(Math.multiplyExact(unit.getDuration().seconds, amountToAdd)); |
| } |
| Duration duration = unit.getDuration().multipliedBy(amountToAdd); |
| return plusSeconds(duration.getSeconds()).plusNanos(duration.getNano()); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Returns a copy of this duration with the specified duration in standard 24 hour days added. |
| * <p> |
| * The number of days is multiplied by 86400 to obtain the number of seconds to add. |
| * This is based on the standard definition of a day as 24 hours. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @param daysToAdd the days to add, positive or negative |
| * @return a {@code Duration} based on this duration with the specified days added, not null |
| * @throws ArithmeticException if numeric overflow occurs |
| */ |
| public Duration plusDays(long daysToAdd) { |
| return plus(Math.multiplyExact(daysToAdd, SECONDS_PER_DAY), 0); |
| } |
| |
| /** |
| * Returns a copy of this duration with the specified duration in hours added. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @param hoursToAdd the hours to add, positive or negative |
| * @return a {@code Duration} based on this duration with the specified hours added, not null |
| * @throws ArithmeticException if numeric overflow occurs |
| */ |
| public Duration plusHours(long hoursToAdd) { |
| return plus(Math.multiplyExact(hoursToAdd, SECONDS_PER_HOUR), 0); |
| } |
| |
| /** |
| * Returns a copy of this duration with the specified duration in minutes added. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @param minutesToAdd the minutes to add, positive or negative |
| * @return a {@code Duration} based on this duration with the specified minutes added, not null |
| * @throws ArithmeticException if numeric overflow occurs |
| */ |
| public Duration plusMinutes(long minutesToAdd) { |
| return plus(Math.multiplyExact(minutesToAdd, SECONDS_PER_MINUTE), 0); |
| } |
| |
| /** |
| * Returns a copy of this duration with the specified duration in seconds added. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @param secondsToAdd the seconds to add, positive or negative |
| * @return a {@code Duration} based on this duration with the specified seconds added, not null |
| * @throws ArithmeticException if numeric overflow occurs |
| */ |
| public Duration plusSeconds(long secondsToAdd) { |
| return plus(secondsToAdd, 0); |
| } |
| |
| /** |
| * Returns a copy of this duration with the specified duration in milliseconds added. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @param millisToAdd the milliseconds to add, positive or negative |
| * @return a {@code Duration} based on this duration with the specified milliseconds added, not null |
| * @throws ArithmeticException if numeric overflow occurs |
| */ |
| public Duration plusMillis(long millisToAdd) { |
| return plus(millisToAdd / 1000, (millisToAdd % 1000) * 1000_000); |
| } |
| |
| /** |
| * Returns a copy of this duration with the specified duration in nanoseconds added. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @param nanosToAdd the nanoseconds to add, positive or negative |
| * @return a {@code Duration} based on this duration with the specified nanoseconds added, not null |
| * @throws ArithmeticException if numeric overflow occurs |
| */ |
| public Duration plusNanos(long nanosToAdd) { |
| return plus(0, nanosToAdd); |
| } |
| |
| /** |
| * Returns a copy of this duration with the specified duration added. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @param secondsToAdd the seconds to add, positive or negative |
| * @param nanosToAdd the nanos to add, positive or negative |
| * @return a {@code Duration} based on this duration with the specified seconds added, not null |
| * @throws ArithmeticException if numeric overflow occurs |
| */ |
| private Duration plus(long secondsToAdd, long nanosToAdd) { |
| if ((secondsToAdd | nanosToAdd) == 0) { |
| return this; |
| } |
| long epochSec = Math.addExact(seconds, secondsToAdd); |
| epochSec = Math.addExact(epochSec, nanosToAdd / NANOS_PER_SECOND); |
| nanosToAdd = nanosToAdd % NANOS_PER_SECOND; |
| long nanoAdjustment = nanos + nanosToAdd; // safe int+NANOS_PER_SECOND |
| return ofSeconds(epochSec, nanoAdjustment); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Returns a copy of this duration with the specified duration subtracted. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @param duration the duration to subtract, positive or negative, not null |
| * @return a {@code Duration} based on this duration with the specified duration subtracted, not null |
| * @throws ArithmeticException if numeric overflow occurs |
| */ |
| public Duration minus(Duration duration) { |
| long secsToSubtract = duration.getSeconds(); |
| int nanosToSubtract = duration.getNano(); |
| if (secsToSubtract == Long.MIN_VALUE) { |
| return plus(Long.MAX_VALUE, -nanosToSubtract).plus(1, 0); |
| } |
| return plus(-secsToSubtract, -nanosToSubtract); |
| } |
| |
| /** |
| * Returns a copy of this duration with the specified duration subtracted. |
| * <p> |
| * The duration amount is measured in terms of the specified unit. |
| * Only a subset of units are accepted by this method. |
| * The unit must either have an {@linkplain TemporalUnit#isDurationEstimated() exact duration} or |
| * be {@link ChronoUnit#DAYS} which is treated as 24 hours. Other units throw an exception. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @param amountToSubtract the amount to subtract, measured in terms of the unit, positive or negative |
| * @param unit the unit that the amount is measured in, must have an exact duration, not null |
| * @return a {@code Duration} based on this duration with the specified duration subtracted, not null |
| * @throws ArithmeticException if numeric overflow occurs |
| */ |
| public Duration minus(long amountToSubtract, TemporalUnit unit) { |
| return (amountToSubtract == Long.MIN_VALUE ? plus(Long.MAX_VALUE, unit).plus(1, unit) : plus(-amountToSubtract, unit)); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Returns a copy of this duration with the specified duration in standard 24 hour days subtracted. |
| * <p> |
| * The number of days is multiplied by 86400 to obtain the number of seconds to subtract. |
| * This is based on the standard definition of a day as 24 hours. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @param daysToSubtract the days to subtract, positive or negative |
| * @return a {@code Duration} based on this duration with the specified days subtracted, not null |
| * @throws ArithmeticException if numeric overflow occurs |
| */ |
| public Duration minusDays(long daysToSubtract) { |
| return (daysToSubtract == Long.MIN_VALUE ? plusDays(Long.MAX_VALUE).plusDays(1) : plusDays(-daysToSubtract)); |
| } |
| |
| /** |
| * Returns a copy of this duration with the specified duration in hours subtracted. |
| * <p> |
| * The number of hours is multiplied by 3600 to obtain the number of seconds to subtract. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @param hoursToSubtract the hours to subtract, positive or negative |
| * @return a {@code Duration} based on this duration with the specified hours subtracted, not null |
| * @throws ArithmeticException if numeric overflow occurs |
| */ |
| public Duration minusHours(long hoursToSubtract) { |
| return (hoursToSubtract == Long.MIN_VALUE ? plusHours(Long.MAX_VALUE).plusHours(1) : plusHours(-hoursToSubtract)); |
| } |
| |
| /** |
| * Returns a copy of this duration with the specified duration in minutes subtracted. |
| * <p> |
| * The number of hours is multiplied by 60 to obtain the number of seconds to subtract. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @param minutesToSubtract the minutes to subtract, positive or negative |
| * @return a {@code Duration} based on this duration with the specified minutes subtracted, not null |
| * @throws ArithmeticException if numeric overflow occurs |
| */ |
| public Duration minusMinutes(long minutesToSubtract) { |
| return (minutesToSubtract == Long.MIN_VALUE ? plusMinutes(Long.MAX_VALUE).plusMinutes(1) : plusMinutes(-minutesToSubtract)); |
| } |
| |
| /** |
| * Returns a copy of this duration with the specified duration in seconds subtracted. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @param secondsToSubtract the seconds to subtract, positive or negative |
| * @return a {@code Duration} based on this duration with the specified seconds subtracted, not null |
| * @throws ArithmeticException if numeric overflow occurs |
| */ |
| public Duration minusSeconds(long secondsToSubtract) { |
| return (secondsToSubtract == Long.MIN_VALUE ? plusSeconds(Long.MAX_VALUE).plusSeconds(1) : plusSeconds(-secondsToSubtract)); |
| } |
| |
| /** |
| * Returns a copy of this duration with the specified duration in milliseconds subtracted. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @param millisToSubtract the milliseconds to subtract, positive or negative |
| * @return a {@code Duration} based on this duration with the specified milliseconds subtracted, not null |
| * @throws ArithmeticException if numeric overflow occurs |
| */ |
| public Duration minusMillis(long millisToSubtract) { |
| return (millisToSubtract == Long.MIN_VALUE ? plusMillis(Long.MAX_VALUE).plusMillis(1) : plusMillis(-millisToSubtract)); |
| } |
| |
| /** |
| * Returns a copy of this duration with the specified duration in nanoseconds subtracted. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @param nanosToSubtract the nanoseconds to subtract, positive or negative |
| * @return a {@code Duration} based on this duration with the specified nanoseconds subtracted, not null |
| * @throws ArithmeticException if numeric overflow occurs |
| */ |
| public Duration minusNanos(long nanosToSubtract) { |
| return (nanosToSubtract == Long.MIN_VALUE ? plusNanos(Long.MAX_VALUE).plusNanos(1) : plusNanos(-nanosToSubtract)); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Returns a copy of this duration multiplied by the scalar. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @param multiplicand the value to multiply the duration by, positive or negative |
| * @return a {@code Duration} based on this duration multiplied by the specified scalar, not null |
| * @throws ArithmeticException if numeric overflow occurs |
| */ |
| public Duration multipliedBy(long multiplicand) { |
| if (multiplicand == 0) { |
| return ZERO; |
| } |
| if (multiplicand == 1) { |
| return this; |
| } |
| return create(toSeconds().multiply(BigDecimal.valueOf(multiplicand))); |
| } |
| |
| /** |
| * Returns a copy of this duration divided by the specified value. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @param divisor the value to divide the duration by, positive or negative, not zero |
| * @return a {@code Duration} based on this duration divided by the specified divisor, not null |
| * @throws ArithmeticException if the divisor is zero or if numeric overflow occurs |
| */ |
| public Duration dividedBy(long divisor) { |
| if (divisor == 0) { |
| throw new ArithmeticException("Cannot divide by zero"); |
| } |
| if (divisor == 1) { |
| return this; |
| } |
| return create(toSeconds().divide(BigDecimal.valueOf(divisor), RoundingMode.DOWN)); |
| } |
| |
| /** |
| * Converts this duration to the total length in seconds and |
| * fractional nanoseconds expressed as a {@code BigDecimal}. |
| * |
| * @return the total length of the duration in seconds, with a scale of 9, not null |
| */ |
| private BigDecimal toSeconds() { |
| return BigDecimal.valueOf(seconds).add(BigDecimal.valueOf(nanos, 9)); |
| } |
| |
| /** |
| * Creates an instance of {@code Duration} from a number of seconds. |
| * |
| * @param seconds the number of seconds, up to scale 9, positive or negative |
| * @return a {@code Duration}, not null |
| * @throws ArithmeticException if numeric overflow occurs |
| */ |
| private static Duration create(BigDecimal seconds) { |
| BigInteger nanos = seconds.movePointRight(9).toBigIntegerExact(); |
| BigInteger[] divRem = nanos.divideAndRemainder(BI_NANOS_PER_SECOND); |
| if (divRem[0].bitLength() > 63) { |
| throw new ArithmeticException("Exceeds capacity of Duration: " + nanos); |
| } |
| return ofSeconds(divRem[0].longValue(), divRem[1].intValue()); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Returns a copy of this duration with the length negated. |
| * <p> |
| * This method swaps the sign of the total length of this duration. |
| * For example, {@code PT1.3S} will be returned as {@code PT-1.3S}. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @return a {@code Duration} based on this duration with the amount negated, not null |
| * @throws ArithmeticException if numeric overflow occurs |
| */ |
| public Duration negated() { |
| return multipliedBy(-1); |
| } |
| |
| /** |
| * Returns a copy of this duration with a positive length. |
| * <p> |
| * This method returns a positive duration by effectively removing the sign from any negative total length. |
| * For example, {@code PT-1.3S} will be returned as {@code PT1.3S}. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @return a {@code Duration} based on this duration with an absolute length, not null |
| * @throws ArithmeticException if numeric overflow occurs |
| */ |
| public Duration abs() { |
| return isNegative() ? negated() : this; |
| } |
| |
| //------------------------------------------------------------------------- |
| /** |
| * Adds this duration to the specified temporal object. |
| * <p> |
| * This returns a temporal object of the same observable type as the input |
| * with this duration added. |
| * <p> |
| * In most cases, it is clearer to reverse the calling pattern by using |
| * {@link Temporal#plus(TemporalAmount)}. |
| * <pre> |
| * // these two lines are equivalent, but the second approach is recommended |
| * dateTime = thisDuration.addTo(dateTime); |
| * dateTime = dateTime.plus(thisDuration); |
| * </pre> |
| * <p> |
| * The calculation will add the seconds, then nanos. |
| * Only non-zero amounts will be added. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @param temporal the temporal object to adjust, not null |
| * @return an object of the same type with the adjustment made, not null |
| * @throws DateTimeException if unable to add |
| * @throws ArithmeticException if numeric overflow occurs |
| */ |
| @Override |
| public Temporal addTo(Temporal temporal) { |
| if (seconds != 0) { |
| temporal = temporal.plus(seconds, SECONDS); |
| } |
| if (nanos != 0) { |
| temporal = temporal.plus(nanos, NANOS); |
| } |
| return temporal; |
| } |
| |
| /** |
| * Subtracts this duration from the specified temporal object. |
| * <p> |
| * This returns a temporal object of the same observable type as the input |
| * with this duration subtracted. |
| * <p> |
| * In most cases, it is clearer to reverse the calling pattern by using |
| * {@link Temporal#minus(TemporalAmount)}. |
| * <pre> |
| * // these two lines are equivalent, but the second approach is recommended |
| * dateTime = thisDuration.subtractFrom(dateTime); |
| * dateTime = dateTime.minus(thisDuration); |
| * </pre> |
| * <p> |
| * The calculation will subtract the seconds, then nanos. |
| * Only non-zero amounts will be added. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @param temporal the temporal object to adjust, not null |
| * @return an object of the same type with the adjustment made, not null |
| * @throws DateTimeException if unable to subtract |
| * @throws ArithmeticException if numeric overflow occurs |
| */ |
| @Override |
| public Temporal subtractFrom(Temporal temporal) { |
| if (seconds != 0) { |
| temporal = temporal.minus(seconds, SECONDS); |
| } |
| if (nanos != 0) { |
| temporal = temporal.minus(nanos, NANOS); |
| } |
| return temporal; |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Gets the number of days in this duration. |
| * <p> |
| * This returns the total number of days in the duration by dividing the |
| * number of seconds by 86400. |
| * This is based on the standard definition of a day as 24 hours. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @return the number of days in the duration, may be negative |
| */ |
| public long toDays() { |
| return seconds / SECONDS_PER_DAY; |
| } |
| |
| /** |
| * Gets the number of hours in this duration. |
| * <p> |
| * This returns the total number of hours in the duration by dividing the |
| * number of seconds by 3600. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @return the number of hours in the duration, may be negative |
| */ |
| public long toHours() { |
| return seconds / SECONDS_PER_HOUR; |
| } |
| |
| /** |
| * Gets the number of minutes in this duration. |
| * <p> |
| * This returns the total number of minutes in the duration by dividing the |
| * number of seconds by 60. |
| * <p> |
| * This instance is immutable and unaffected by this method call. |
| * |
| * @return the number of minutes in the duration, may be negative |
| */ |
| public long toMinutes() { |
| return seconds / SECONDS_PER_MINUTE; |
| } |
| |
| /** |
| * Converts this duration to the total length in milliseconds. |
| * <p> |
| * If this duration is too large to fit in a {@code long} milliseconds, then an |
| * exception is thrown. |
| * <p> |
| * If this duration has greater than millisecond precision, then the conversion |
| * will drop any excess precision information as though the amount in nanoseconds |
| * was subject to integer division by one million. |
| * |
| * @return the total length of the duration in milliseconds |
| * @throws ArithmeticException if numeric overflow occurs |
| */ |
| public long toMillis() { |
| long millis = Math.multiplyExact(seconds, 1000); |
| millis = Math.addExact(millis, nanos / 1000_000); |
| return millis; |
| } |
| |
| /** |
| * Converts this duration to the total length in nanoseconds expressed as a {@code long}. |
| * <p> |
| * If this duration is too large to fit in a {@code long} nanoseconds, then an |
| * exception is thrown. |
| * |
| * @return the total length of the duration in nanoseconds |
| * @throws ArithmeticException if numeric overflow occurs |
| */ |
| public long toNanos() { |
| long totalNanos = Math.multiplyExact(seconds, NANOS_PER_SECOND); |
| totalNanos = Math.addExact(totalNanos, nanos); |
| return totalNanos; |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Compares this duration to the specified {@code Duration}. |
| * <p> |
| * The comparison is based on the total length of the durations. |
| * It is "consistent with equals", as defined by {@link Comparable}. |
| * |
| * @param otherDuration the other duration to compare to, not null |
| * @return the comparator value, negative if less, positive if greater |
| */ |
| @Override |
| public int compareTo(Duration otherDuration) { |
| int cmp = Long.compare(seconds, otherDuration.seconds); |
| if (cmp != 0) { |
| return cmp; |
| } |
| return nanos - otherDuration.nanos; |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Checks if this duration is equal to the specified {@code Duration}. |
| * <p> |
| * The comparison is based on the total length of the durations. |
| * |
| * @param otherDuration the other duration, null returns false |
| * @return true if the other duration is equal to this one |
| */ |
| @Override |
| public boolean equals(Object otherDuration) { |
| if (this == otherDuration) { |
| return true; |
| } |
| if (otherDuration instanceof Duration) { |
| Duration other = (Duration) otherDuration; |
| return this.seconds == other.seconds && |
| this.nanos == other.nanos; |
| } |
| return false; |
| } |
| |
| /** |
| * A hash code for this duration. |
| * |
| * @return a suitable hash code |
| */ |
| @Override |
| public int hashCode() { |
| return ((int) (seconds ^ (seconds >>> 32))) + (51 * nanos); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * A string representation of this duration using ISO-8601 seconds |
| * based representation, such as {@code PT8H6M12.345S}. |
| * <p> |
| * The format of the returned string will be {@code PTnHnMnS}, where n is |
| * the relevant hours, minutes or seconds part of the duration. |
| * Any fractional seconds are placed after a decimal point i the seconds section. |
| * If a section has a zero value, it is omitted. |
| * The hours, minutes and seconds will all have the same sign. |
| * <p> |
| * Examples: |
| * <pre> |
| * "20.345 seconds" -- "PT20.345S |
| * "15 minutes" (15 * 60 seconds) -- "PT15M" |
| * "10 hours" (10 * 3600 seconds) -- "PT10H" |
| * "2 days" (2 * 86400 seconds) -- "PT48H" |
| * </pre> |
| * Note that multiples of 24 hours are not output as days to avoid confusion |
| * with {@code Period}. |
| * |
| * @return an ISO-8601 representation of this duration, not null |
| */ |
| @Override |
| public String toString() { |
| if (this == ZERO) { |
| return "PT0S"; |
| } |
| long hours = seconds / SECONDS_PER_HOUR; |
| int minutes = (int) ((seconds % SECONDS_PER_HOUR) / SECONDS_PER_MINUTE); |
| int secs = (int) (seconds % SECONDS_PER_MINUTE); |
| StringBuilder buf = new StringBuilder(24); |
| buf.append("PT"); |
| if (hours != 0) { |
| buf.append(hours).append('H'); |
| } |
| if (minutes != 0) { |
| buf.append(minutes).append('M'); |
| } |
| if (secs == 0 && nanos == 0 && buf.length() > 2) { |
| return buf.toString(); |
| } |
| if (secs < 0 && nanos > 0) { |
| if (secs == -1) { |
| buf.append("-0"); |
| } else { |
| buf.append(secs + 1); |
| } |
| } else { |
| buf.append(secs); |
| } |
| if (nanos > 0) { |
| int pos = buf.length(); |
| if (secs < 0) { |
| buf.append(2 * NANOS_PER_SECOND - nanos); |
| } else { |
| buf.append(nanos + NANOS_PER_SECOND); |
| } |
| while (buf.charAt(buf.length() - 1) == '0') { |
| buf.setLength(buf.length() - 1); |
| } |
| buf.setCharAt(pos, '.'); |
| } |
| buf.append('S'); |
| return buf.toString(); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Writes the object using a |
| * <a href="../../serialized-form.html#java.time.Ser">dedicated serialized form</a>. |
| * @serialData |
| * <pre> |
| * out.writeByte(1); // identifies a Duration |
| * out.writeLong(seconds); |
| * out.writeInt(nanos); |
| * </pre> |
| * |
| * @return the instance of {@code Ser}, not null |
| */ |
| private Object writeReplace() { |
| return new Ser(Ser.DURATION_TYPE, this); |
| } |
| |
| /** |
| * 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"); |
| } |
| |
| void writeExternal(DataOutput out) throws IOException { |
| out.writeLong(seconds); |
| out.writeInt(nanos); |
| } |
| |
| static Duration readExternal(DataInput in) throws IOException { |
| long seconds = in.readLong(); |
| int nanos = in.readInt(); |
| return Duration.ofSeconds(seconds, nanos); |
| } |
| |
| } |
