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HijrahEra.java
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/*
* Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*
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/*
*
*
*
*
*
* Copyright (c) 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.chrono;
import static java.time.temporal.ChronoField.ERA;
import java.time.DateTimeException;
import java.time.temporal.ChronoField;
import java.time.temporal.TemporalField;
import java.time.temporal.UnsupportedTemporalTypeException;
import java.time.temporal.ValueRange;
/**
* An era in the Hijrah calendar system.
* <p>
* The Hijrah calendar system has only one era covering the
* proleptic years greater than zero.
* <p>
* <b>Do not use {@code ordinal()} to obtain the numeric representation of {@code HijrahEra}.
* Use {@code getValue()} instead.</b>
*
* @implSpec
* This is an immutable and thread-safe enum.
*
* @since 1.8
*/
public enum HijrahEra implements Era {
/**
* The singleton instance for the current era, 'Anno Hegirae',
* which has the numeric value 1.
*/
AH;
//-----------------------------------------------------------------------
/**
* Obtains an instance of {@code HijrahEra} from an {@code int} value.
* <p>
* The current era, which is the only accepted value, has the value 1
*
* @param hijrahEra the era to represent, only 1 supported
* @return the HijrahEra.AH singleton, not null
* @throws DateTimeException if the value is invalid
*/
public static HijrahEra of(int hijrahEra) {
if (hijrahEra == 1 ) {
return AH;
} else {
throw new DateTimeException("Invalid era: " + hijrahEra);
}
}
//-----------------------------------------------------------------------
/**
* Gets the numeric era {@code int} value.
* <p>
* The era AH has the value 1.
*
* @return the era value, 1 (AH)
*/
@Override
public int getValue() {
return 1;
}
//-----------------------------------------------------------------------
/**
* Gets the range of valid values for the specified field.
* <p>
* The range object expresses the minimum and maximum valid values for a field.
* This era is used to enhance the accuracy of the returned range.
* If it is not possible to return the range, because the field is not supported
* or for some other reason, an exception is thrown.
* <p>
* If the field is a {@link ChronoField} then the query is implemented here.
* The {@code ERA} field returns the range.
* All other {@code ChronoField} instances will throw an {@code UnsupportedTemporalTypeException}.
* <p>
* If the field is not a {@code ChronoField}, then the result of this method
* is obtained by invoking {@code TemporalField.rangeRefinedBy(TemporalAccessor)}
* passing {@code this} as the argument.
* Whether the range can be obtained is determined by the field.
* <p>
* The {@code ERA} field returns a range for the one valid Hijrah era.
*
* @param field the field to query the range for, not null
* @return the range of valid values for the field, not null
* @throws DateTimeException if the range for the field cannot be obtained
* @throws UnsupportedTemporalTypeException if the unit is not supported
*/
@Override // override as super would return range from 0 to 1
public ValueRange range(TemporalField field) {
if (field == ERA) {
return ValueRange.of(1, 1);
}
return Era.super.range(field);
}
}