366 lines
15 KiB
Java
366 lines
15 KiB
Java
|
/*
|
||
|
|
* Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
|
||
|
|
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
|
||
|
|
*
|
||
|
|
* This code is free software; you can redistribute it and/or modify it
|
||
|
|
* under the terms of the GNU General Public License version 2 only, as
|
||
|
|
* published by the Free Software Foundation. Oracle designates this
|
||
|
|
* particular file as subject to the "Classpath" exception as provided
|
||
|
|
* by Oracle in the LICENSE file that accompanied this code.
|
||
|
|
*
|
||
|
|
* This code is distributed in the hope that it will be useful, but WITHOUT
|
||
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
||
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
||
|
|
* version 2 for more details (a copy is included in the LICENSE file that
|
||
|
|
* accompanied this code).
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU General Public License version
|
||
|
|
* 2 along with this work; if not, write to the Free Software Foundation,
|
||
|
|
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
|
||
|
|
*
|
||
|
|
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
|
||
|
|
* or visit www.oracle.com if you need additional information or have any
|
||
|
|
* questions.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
* This file is available under and governed by the GNU General Public
|
||
|
|
* License version 2 only, as published by the Free Software Foundation.
|
||
|
|
* However, the following notice accompanied the original version of this
|
||
|
|
* file:
|
||
|
|
*
|
||
|
|
* Copyright (c) 2013, 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.chrono;
|
||
|
|
|
||
|
|
import java.time.DateTimeException;
|
||
|
|
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.List;
|
||
|
|
import java.util.Objects;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* A date-based amount of time, such as '3 years, 4 months and 5 days' in an
|
||
|
|
* arbitrary chronology, intended for advanced globalization use cases.
|
||
|
|
* <p>
|
||
|
|
* This interface models a date-based amount of time in a calendar system.
|
||
|
|
* While most calendar systems use years, months and days, some do not.
|
||
|
|
* Therefore, this interface operates solely in terms of a set of supported
|
||
|
|
* units that are defined by the {@code Chronology}.
|
||
|
|
* The set of supported units is fixed for a given chronology.
|
||
|
|
* The amount of a supported unit may be set to zero.
|
||
|
|
* <p>
|
||
|
|
* The period is modeled as a directed amount of time, meaning that individual
|
||
|
|
* parts of the period may be negative.
|
||
|
|
*
|
||
|
|
* @implSpec
|
||
|
|
* This interface must be implemented with care to ensure other classes operate correctly.
|
||
|
|
* All implementations that can be instantiated must be final, immutable and thread-safe.
|
||
|
|
* Subclasses should be Serializable wherever possible.
|
||
|
|
*
|
||
|
|
* @since 1.8
|
||
|
|
*/
|
||
|
|
public interface ChronoPeriod
|
||
|
|
extends TemporalAmount {
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Obtains a {@code ChronoPeriod} consisting of amount of time between two dates.
|
||
|
|
* <p>
|
||
|
|
* The start date is included, but the end date is not.
|
||
|
|
* The period is calculated using {@link ChronoLocalDate#until(ChronoLocalDate)}.
|
||
|
|
* As such, the calculation is chronology specific.
|
||
|
|
* <p>
|
||
|
|
* The chronology of the first date is used.
|
||
|
|
* The chronology of the second date is ignored, with the date being converted
|
||
|
|
* to the target chronology system before the calculation starts.
|
||
|
|
* <p>
|
||
|
|
* The result of this method can be a negative period if the end is before the start.
|
||
|
|
* In most cases, the positive/negative sign will be the same in each of the supported fields.
|
||
|
|
*
|
||
|
|
* @param startDateInclusive the start date, inclusive, specifying the chronology of the calculation, not null
|
||
|
|
* @param endDateExclusive the end date, exclusive, in any chronology, not null
|
||
|
|
* @return the period between this date and the end date, not null
|
||
|
|
* @see ChronoLocalDate#until(ChronoLocalDate)
|
||
|
|
*/
|
||
|
|
public static ChronoPeriod between(ChronoLocalDate startDateInclusive, ChronoLocalDate endDateExclusive) {
|
||
|
|
Objects.requireNonNull(startDateInclusive, "startDateInclusive");
|
||
|
|
Objects.requireNonNull(endDateExclusive, "endDateExclusive");
|
||
|
|
return startDateInclusive.until(endDateExclusive);
|
||
|
|
}
|
||
|
|
|
||
|
|
//-----------------------------------------------------------------------
|
||
|
|
/**
|
||
|
|
* Gets the value of the requested unit.
|
||
|
|
* <p>
|
||
|
|
* The supported units are chronology specific.
|
||
|
|
* They will typically be {@link ChronoUnit#YEARS YEARS},
|
||
|
|
* {@link ChronoUnit#MONTHS MONTHS} and {@link ChronoUnit#DAYS DAYS}.
|
||
|
|
* Requesting an unsupported unit will 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
|
||
|
|
long get(TemporalUnit unit);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Gets the set of units supported by this period.
|
||
|
|
* <p>
|
||
|
|
* The supported units are chronology specific.
|
||
|
|
* They will typically be {@link ChronoUnit#YEARS YEARS},
|
||
|
|
* {@link ChronoUnit#MONTHS MONTHS} and {@link ChronoUnit#DAYS DAYS}.
|
||
|
|
* They are returned in order from largest to smallest.
|
||
|
|
* <p>
|
||
|
|
* This set can be used in conjunction with {@link #get(TemporalUnit)}
|
||
|
|
* to access the entire state of the period.
|
||
|
|
*
|
||
|
|
* @return a list containing the supported units, not null
|
||
|
|
*/
|
||
|
|
@Override
|
||
|
|
List<TemporalUnit> getUnits();
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Gets the chronology that defines the meaning of the supported units.
|
||
|
|
* <p>
|
||
|
|
* The period is defined by the chronology.
|
||
|
|
* It controls the supported units and restricts addition/subtraction
|
||
|
|
* to {@code ChronoLocalDate} instances of the same chronology.
|
||
|
|
*
|
||
|
|
* @return the chronology defining the period, not null
|
||
|
|
*/
|
||
|
|
Chronology getChronology();
|
||
|
|
|
||
|
|
//-----------------------------------------------------------------------
|
||
|
|
/**
|
||
|
|
* Checks if all the supported units of this period are zero.
|
||
|
|
*
|
||
|
|
* @return true if this period is zero-length
|
||
|
|
*/
|
||
|
|
default boolean isZero() {
|
||
|
|
for (TemporalUnit unit : getUnits()) {
|
||
|
|
if (get(unit) != 0) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks if any of the supported units of this period are negative.
|
||
|
|
*
|
||
|
|
* @return true if any unit of this period is negative
|
||
|
|
*/
|
||
|
|
default boolean isNegative() {
|
||
|
|
for (TemporalUnit unit : getUnits()) {
|
||
|
|
if (get(unit) < 0) {
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
//-----------------------------------------------------------------------
|
||
|
|
/**
|
||
|
|
* Returns a copy of this period with the specified period added.
|
||
|
|
* <p>
|
||
|
|
* If the specified amount is a {@code ChronoPeriod} then it must have
|
||
|
|
* the same chronology as this period. Implementations may choose to
|
||
|
|
* accept or reject other {@code TemporalAmount} implementations.
|
||
|
|
* <p>
|
||
|
|
* This instance is immutable and unaffected by this method call.
|
||
|
|
*
|
||
|
|
* @param amountToAdd the period to add, not null
|
||
|
|
* @return a {@code ChronoPeriod} based on this period with the requested period added, not null
|
||
|
|
* @throws ArithmeticException if numeric overflow occurs
|
||
|
|
*/
|
||
|
|
ChronoPeriod plus(TemporalAmount amountToAdd);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns a copy of this period with the specified period subtracted.
|
||
|
|
* <p>
|
||
|
|
* If the specified amount is a {@code ChronoPeriod} then it must have
|
||
|
|
* the same chronology as this period. Implementations may choose to
|
||
|
|
* accept or reject other {@code TemporalAmount} implementations.
|
||
|
|
* <p>
|
||
|
|
* This instance is immutable and unaffected by this method call.
|
||
|
|
*
|
||
|
|
* @param amountToSubtract the period to subtract, not null
|
||
|
|
* @return a {@code ChronoPeriod} based on this period with the requested period subtracted, not null
|
||
|
|
* @throws ArithmeticException if numeric overflow occurs
|
||
|
|
*/
|
||
|
|
ChronoPeriod minus(TemporalAmount amountToSubtract);
|
||
|
|
|
||
|
|
//-----------------------------------------------------------------------
|
||
|
|
/**
|
||
|
|
* Returns a new instance with each amount in this period in this period
|
||
|
|
* multiplied by the specified scalar.
|
||
|
|
* <p>
|
||
|
|
* This returns a period with each supported unit individually multiplied.
|
||
|
|
* For example, a period of "2 years, -3 months and 4 days" multiplied by
|
||
|
|
* 3 will return "6 years, -9 months and 12 days".
|
||
|
|
* No normalization is performed.
|
||
|
|
*
|
||
|
|
* @param scalar the scalar to multiply by, not null
|
||
|
|
* @return a {@code ChronoPeriod} based on this period with the amounts multiplied
|
||
|
|
* by the scalar, not null
|
||
|
|
* @throws ArithmeticException if numeric overflow occurs
|
||
|
|
*/
|
||
|
|
ChronoPeriod multipliedBy(int scalar);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns a new instance with each amount in this period negated.
|
||
|
|
* <p>
|
||
|
|
* This returns a period with each supported unit individually negated.
|
||
|
|
* For example, a period of "2 years, -3 months and 4 days" will be
|
||
|
|
* negated to "-2 years, 3 months and -4 days".
|
||
|
|
* No normalization is performed.
|
||
|
|
*
|
||
|
|
* @return a {@code ChronoPeriod} based on this period with the amounts negated, not null
|
||
|
|
* @throws ArithmeticException if numeric overflow occurs, which only happens if
|
||
|
|
* one of the units has the value {@code Long.MIN_VALUE}
|
||
|
|
*/
|
||
|
|
default ChronoPeriod negated() {
|
||
|
|
return multipliedBy(-1);
|
||
|
|
}
|
||
|
|
|
||
|
|
//-----------------------------------------------------------------------
|
||
|
|
/**
|
||
|
|
* Returns a copy of this period with the amounts of each unit normalized.
|
||
|
|
* <p>
|
||
|
|
* The process of normalization is specific to each calendar system.
|
||
|
|
* For example, in the ISO calendar system, the years and months are
|
||
|
|
* normalized but the days are not, such that "15 months" would be
|
||
|
|
* normalized to "1 year and 3 months".
|
||
|
|
* <p>
|
||
|
|
* This instance is immutable and unaffected by this method call.
|
||
|
|
*
|
||
|
|
* @return a {@code ChronoPeriod} based on this period with the amounts of each
|
||
|
|
* unit normalized, not null
|
||
|
|
* @throws ArithmeticException if numeric overflow occurs
|
||
|
|
*/
|
||
|
|
ChronoPeriod normalized();
|
||
|
|
|
||
|
|
//-------------------------------------------------------------------------
|
||
|
|
/**
|
||
|
|
* Adds this period to the specified temporal object.
|
||
|
|
* <p>
|
||
|
|
* This returns a temporal object of the same observable type as the input
|
||
|
|
* with this period 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 = thisPeriod.addTo(dateTime);
|
||
|
|
* dateTime = dateTime.plus(thisPeriod);
|
||
|
|
* </pre>
|
||
|
|
* <p>
|
||
|
|
* The specified temporal must have the same chronology as this period.
|
||
|
|
* This returns a temporal with the non-zero supported units 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
|
||
|
|
Temporal addTo(Temporal temporal);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Subtracts this period from the specified temporal object.
|
||
|
|
* <p>
|
||
|
|
* This returns a temporal object of the same observable type as the input
|
||
|
|
* with this period 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 = thisPeriod.subtractFrom(dateTime);
|
||
|
|
* dateTime = dateTime.minus(thisPeriod);
|
||
|
|
* </pre>
|
||
|
|
* <p>
|
||
|
|
* The specified temporal must have the same chronology as this period.
|
||
|
|
* This returns a temporal with the non-zero supported units subtracted.
|
||
|
|
* <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
|
||
|
|
Temporal subtractFrom(Temporal temporal);
|
||
|
|
|
||
|
|
//-----------------------------------------------------------------------
|
||
|
|
/**
|
||
|
|
* Checks if this period is equal to another period, including the chronology.
|
||
|
|
* <p>
|
||
|
|
* Compares this period with another ensuring that the type, each amount and
|
||
|
|
* the chronology are the same.
|
||
|
|
* Note that this means that a period of "15 Months" is not equal to a period
|
||
|
|
* of "1 Year and 3 Months".
|
||
|
|
*
|
||
|
|
* @param obj the object to check, null returns false
|
||
|
|
* @return true if this is equal to the other period
|
||
|
|
*/
|
||
|
|
@Override
|
||
|
|
boolean equals(Object obj);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* A hash code for this period.
|
||
|
|
*
|
||
|
|
* @return a suitable hash code
|
||
|
|
*/
|
||
|
|
@Override
|
||
|
|
int hashCode();
|
||
|
|
|
||
|
|
//-----------------------------------------------------------------------
|
||
|
|
/**
|
||
|
|
* Outputs this period as a {@code String}.
|
||
|
|
* <p>
|
||
|
|
* The output will include the period amounts and chronology.
|
||
|
|
*
|
||
|
|
* @return a string representation of this period, not null
|
||
|
|
*/
|
||
|
|
@Override
|
||
|
|
String toString();
|
||
|
|
|
||
|
|
}
|