--- a/jdk/src/share/classes/java/time/temporal/Era.java Tue Feb 12 16:02:14 2013 +0400
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,359 +0,0 @@
-/*
- * Copyright (c) 2012, 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) 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.temporal;
-
-import static java.time.temporal.ChronoField.ERA;
-import static java.time.temporal.ChronoUnit.ERAS;
-
-import java.time.DateTimeException;
-import java.time.format.DateTimeFormatterBuilder;
-import java.time.format.TextStyle;
-import java.util.Locale;
-
-/**
- * An era of the time-line.
- * <p>
- * Most calendar systems have a single epoch dividing the time-line into two eras.
- * However, some calendar systems, have multiple eras, such as one for the reign
- * of each leader.
- * In all cases, the era is conceptually the largest division of the time-line.
- * Each chronology defines the Era's that are known Eras and a
- * {@link Chrono#eras Chrono.eras} to get the valid eras.
- * <p>
- * For example, the Thai Buddhist calendar system divides time into two eras,
- * before and after a single date. By contrast, the Japanese calendar system
- * has one era for the reign of each Emperor.
- * <p>
- * Instances of {@code Era} may be compared using the {@code ==} operator.
- *
- * <h3>Specification for implementors</h3>
- * This interface must be implemented with care to ensure other classes operate correctly.
- * All implementations must be singletons - final, immutable and thread-safe.
- * It is recommended to use an enum whenever possible.
- *
- * @param <C> the chronology of the era
- * @since 1.8
- */
-public interface Era<C extends Chrono<C>> extends TemporalAccessor, TemporalAdjuster {
-
- /**
- * Gets the numeric value associated with the era as defined by the chronology.
- * Each chronology defines the predefined Eras and methods to list the Eras
- * of the chronology.
- * <p>
- * All fields, including eras, have an associated numeric value.
- * The meaning of the numeric value for era is determined by the chronology
- * according to these principles:
- * <p><ul>
- * <li>The era in use at the epoch 1970-01-01 (ISO) has the value 1.
- * <li>Later eras have sequentially higher values.
- * <li>Earlier eras have sequentially lower values, which may be negative.
- * </ul><p>
- *
- * @return the numeric era value
- */
- int getValue();
-
- /**
- * Gets the chronology of this era.
- * <p>
- * The {@code Chrono} represents the calendar system in use.
- * This always returns the standard form of the chronology.
- *
- * @return the chronology, not null
- */
- C getChrono();
-
- //-----------------------------------------------------------------------
- /**
- * Obtains a date in this era given the year-of-era, month, and day.
- * <p>
- * This era is combined with the given date fields to form a date.
- * The year specified must be the year-of-era.
- * Methods to create a date from the proleptic-year are on {@code Chrono}.
- * This always uses the standard form of the chronology.
- * <p>
- * This default implementation invokes the factory method on {@link Chrono}.
- *
- * @param yearOfEra the calendar system year-of-era
- * @param month the calendar system month-of-year
- * @param day the calendar system day-of-month
- * @return a local date based on this era and the specified year-of-era, month and day
- */
- public default ChronoLocalDate<C> date(int yearOfEra, int month, int day) {
- return getChrono().date(this, yearOfEra, month, day);
- }
-
-
- /**
- * Obtains a date in this era given year-of-era and day-of-year fields.
- * <p>
- * This era is combined with the given date fields to form a date.
- * The year specified must be the year-of-era.
- * Methods to create a date from the proleptic-year are on {@code Chrono}.
- * This always uses the standard form of the chronology.
- * <p>
- * This default implementation invokes the factory method on {@link Chrono}.
- *
- * @param yearOfEra the calendar system year-of-era
- * @param dayOfYear the calendar system day-of-year
- * @return a local date based on this era and the specified year-of-era and day-of-year
- */
- public default ChronoLocalDate<C> dateYearDay(int yearOfEra, int dayOfYear) {
- return getChrono().dateYearDay(this, yearOfEra, dayOfYear);
- }
-
- //-----------------------------------------------------------------------
- /**
- * Checks if the specified field is supported.
- * <p>
- * This checks if this era can be queried for the specified field.
- * If false, then calling the {@link #range(TemporalField) range} and
- * {@link #get(TemporalField) get} methods will throw an exception.
- * <p>
- * If the field is a {@link ChronoField} then the query is implemented here.
- * The {@code ERA} field returns true.
- * All other {@code ChronoField} instances will return false.
- * <p>
- * If the field is not a {@code ChronoField}, then the result of this method
- * is obtained by invoking {@code TemporalField.doIsSupported(TemporalAccessor)}
- * passing {@code this} as the argument.
- * Whether the field is supported is determined by the field.
- *
- * @param field the field to check, null returns false
- * @return true if the field is supported on this era, false if not
- */
- @Override
- public default boolean isSupported(TemporalField field) {
- if (field instanceof ChronoField) {
- return field == ERA;
- }
- return field != null && field.doIsSupported(this);
- }
-
- /**
- * 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 a {@code DateTimeException}.
- * <p>
- * If the field is not a {@code ChronoField}, then the result of this method
- * is obtained by invoking {@code TemporalField.doRange(TemporalAccessor)}
- * passing {@code this} as the argument.
- * Whether the range can be obtained is determined by the field.
- *
- * @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
- */
- @Override // override for Javadoc
- public default ValueRange range(TemporalField field) {
- return TemporalAccessor.super.range(field);
- }
-
- /**
- * Gets the value of the specified field from this era as an {@code int}.
- * <p>
- * This queries this era for the value for the specified field.
- * The returned value will always be within the valid range of values for the field.
- * If it is not possible to return the value, 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 value of the era.
- * All other {@code ChronoField} instances will throw a {@code DateTimeException}.
- * <p>
- * If the field is not a {@code ChronoField}, then the result of this method
- * is obtained by invoking {@code TemporalField.doGet(TemporalAccessor)}
- * passing {@code this} as the argument. Whether the value can be obtained,
- * and what the value represents, is determined by the field.
- *
- * @param field the field to get, not null
- * @return the value for the field
- * @throws DateTimeException if a value for the field cannot be obtained
- * @throws ArithmeticException if numeric overflow occurs
- */
- @Override // override for Javadoc and performance
- public default int get(TemporalField field) {
- if (field == ERA) {
- return getValue();
- }
- return range(field).checkValidIntValue(getLong(field), field);
- }
-
- /**
- * Gets the value of the specified field from this era as a {@code long}.
- * <p>
- * This queries this era for the value for the specified field.
- * If it is not possible to return the value, 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 value of the era.
- * All other {@code ChronoField} instances will throw a {@code DateTimeException}.
- * <p>
- * If the field is not a {@code ChronoField}, then the result of this method
- * is obtained by invoking {@code TemporalField.doGet(TemporalAccessor)}
- * passing {@code this} as the argument. Whether the value can be obtained,
- * and what the value represents, is determined by the field.
- *
- * @param field the field to get, not null
- * @return the value for the field
- * @throws DateTimeException if a value for the field cannot be obtained
- * @throws ArithmeticException if numeric overflow occurs
- */
- @Override
- public default long getLong(TemporalField field) {
- if (field == ERA) {
- return getValue();
- } else if (field instanceof ChronoField) {
- throw new DateTimeException("Unsupported field: " + field.getName());
- }
- return field.doGet(this);
- }
-
- //-----------------------------------------------------------------------
- /**
- * Queries this era using the specified query.
- * <p>
- * This queries this era using the specified query strategy object.
- * The {@code TemporalQuery} object defines the logic to be used to
- * obtain the result. Read the documentation of the query to understand
- * what the result of this method will be.
- * <p>
- * The result of this method is obtained by invoking the
- * {@link TemporalQuery#queryFrom(TemporalAccessor)} method on the
- * specified query passing {@code this} as the argument.
- *
- * @param <R> the type of the result
- * @param query the query to invoke, not null
- * @return the query result, null may be returned (defined by the query)
- * @throws DateTimeException if unable to query (defined by the query)
- * @throws ArithmeticException if numeric overflow occurs (defined by the query)
- */
- @SuppressWarnings("unchecked")
- @Override
- public default <R> R query(TemporalQuery<R> query) {
- if (query == Queries.chrono()) {
- return (R) getChrono();
- } else if (query == Queries.precision()) {
- return (R) ERAS;
- }
- return TemporalAccessor.super.query(query);
- }
-
- /**
- * Adjusts the specified temporal object to have the same era as this object.
- * <p>
- * This returns a temporal object of the same observable type as the input
- * with the era changed to be the same as this.
- * <p>
- * The adjustment is equivalent to using {@link Temporal#with(TemporalField, long)}
- * passing {@link ChronoField#ERA} as the field.
- * <p>
- * In most cases, it is clearer to reverse the calling pattern by using
- * {@link Temporal#with(TemporalAdjuster)}:
- * <pre>
- * // these two lines are equivalent, but the second approach is recommended
- * temporal = thisEra.adjustInto(temporal);
- * temporal = temporal.with(thisEra);
- * </pre>
- * <p>
- * This instance is immutable and unaffected by this method call.
- *
- * @param temporal the target object to be adjusted, not null
- * @return the adjusted object, not null
- * @throws DateTimeException if unable to make the adjustment
- * @throws ArithmeticException if numeric overflow occurs
- */
- @Override
- public default Temporal adjustInto(Temporal temporal) {
- return temporal.with(ERA, getValue());
- }
-
- //-----------------------------------------------------------------------
- /**
- * Gets the textual representation of this era.
- * <p>
- * This returns the textual name used to identify the era.
- * The parameters control the style of the returned text and the locale.
- * <p>
- * If no textual mapping is found then the {@link #getValue() numeric value} is returned.
- * <p>
- * This default implementation is suitable for all implementations.
- *
- * @param style the style of the text required, not null
- * @param locale the locale to use, not null
- * @return the text value of the era, not null
- */
- public default String getText(TextStyle style, Locale locale) {
- return new DateTimeFormatterBuilder().appendText(ERA, style).toFormatter(locale).print(this);
- }
-
- // NOTE: methods to convert year-of-era/proleptic-year cannot be here as they may depend on month/day (Japanese)
-}