--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/java/time/temporal/JulianFields.java Tue Jan 22 20:59:21 2013 -0800
@@ -0,0 +1,305 @@
+/*
+ * 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.EPOCH_DAY;
+import static java.time.temporal.ChronoUnit.DAYS;
+import static java.time.temporal.ChronoUnit.FOREVER;
+
+import java.io.InvalidObjectException;
+import java.io.Serializable;
+import java.time.DateTimeException;
+import java.time.LocalDate;
+import java.time.format.DateTimeBuilder;
+
+/**
+ * A set of date fields that provide access to Julian Days.
+ * <p>
+ * The Julian Day is a standard way of expressing date and time commonly used in the scientific community.
+ * It is expressed as a decimal number of whole days where days start at midday.
+ * This class represents variations on Julian Days that count whole days from midnight.
+ *
+ * <h3>Specification for implementors</h3>
+ * This is an immutable and thread-safe class.
+ *
+ * @since 1.8
+ */
+public final class JulianFields {
+
+ /**
+ * The offset from Julian to EPOCH DAY.
+ */
+ private static final long JULIAN_DAY_OFFSET = 2440588L;
+
+ /**
+ * Julian Day field.
+ * <p>
+ * This is an integer-based version of the Julian Day Number.
+ * Julian Day is a well-known system that represents the count of whole days since day 0,
+ * which is defined to be January 1, 4713 BCE in the Julian calendar, and -4713-11-24 Gregorian.
+ * The field has "JulianDay" as 'name', and 'DAYS' as 'baseUnit'.
+ * The field always refers to the local date-time, ignoring the offset or zone.
+ * <p>
+ * For date-times, 'JULIAN_DAY.doGet()' assumes the same value from
+ * midnight until just before the next midnight.
+ * When 'JULIAN_DAY.doWith()' is applied to a date-time, the time of day portion remains unaltered.
+ * 'JULIAN_DAY.doWith()' and 'JULIAN_DAY.doGet()' only apply to {@code Temporal} objects that
+ * can be converted into {@link ChronoField#EPOCH_DAY}.
+ * A {@link DateTimeException} is thrown for any other type of object.
+ * <p>
+ * <h3>Astronomical and Scientific Notes</h3>
+ * The standard astronomical definition uses a fraction to indicate the time-of-day,
+ * thus 3.25 would represent the time 18:00, since days start at midday.
+ * This implementation uses an integer and days starting at midnight.
+ * The integer value for the Julian Day Number is the astronomical Julian Day value at midday
+ * of the date in question.
+ * This amounts to the astronomical Julian Day, rounded to an integer {@code JDN = floor(JD + 0.5)}.
+ * <p>
+ * <pre>
+ * | ISO date | Julian Day Number | Astronomical Julian Day |
+ * | 1970-01-01T00:00 | 2,440,588 | 2,440,587.5 |
+ * | 1970-01-01T06:00 | 2,440,588 | 2,440,587.75 |
+ * | 1970-01-01T12:00 | 2,440,588 | 2,440,588.0 |
+ * | 1970-01-01T18:00 | 2,440,588 | 2,440,588.25 |
+ * | 1970-01-02T00:00 | 2,440,589 | 2,440,588.5 |
+ * | 1970-01-02T06:00 | 2,440,589 | 2,440,588.75 |
+ * | 1970-01-02T12:00 | 2,440,589 | 2,440,589.0 |
+ * </pre>
+ * <p>
+ * Julian Days are sometimes taken to imply Universal Time or UTC, but this
+ * implementation always uses the Julian Day number for the local date,
+ * regardless of the offset or time-zone.
+ */
+ public static final TemporalField JULIAN_DAY = new Field("JulianDay", DAYS, FOREVER, JULIAN_DAY_OFFSET);
+
+ /**
+ * Modified Julian Day field.
+ * <p>
+ * This is an integer-based version of the Modified Julian Day Number.
+ * Modified Julian Day (MJD) is a well-known system that counts days continuously.
+ * It is defined relative to astronomical Julian Day as {@code MJD = JD - 2400000.5}.
+ * Each Modified Julian Day runs from midnight to midnight.
+ * The field always refers to the local date-time, ignoring the offset or zone.
+ * <p>
+ * For date-times, 'MODIFIED_JULIAN_DAY.doGet()' assumes the same value from
+ * midnight until just before the next midnight.
+ * When 'MODIFIED_JULIAN_DAY.doWith()' is applied to a date-time, the time of day portion remains unaltered.
+ * 'MODIFIED_JULIAN_DAY.doWith()' and 'MODIFIED_JULIAN_DAY.doGet()' only apply to {@code Temporal} objects
+ * that can be converted into {@link ChronoField#EPOCH_DAY}.
+ * A {@link DateTimeException} is thrown for any other type of object.
+ * <p>
+ * This implementation is an integer version of MJD with the decimal part rounded to floor.
+ * <p>
+ * <h3>Astronomical and Scientific Notes</h3>
+ * <pre>
+ * | ISO date | Modified Julian Day | Decimal MJD |
+ * | 1970-01-01T00:00 | 40,587 | 40,587.0 |
+ * | 1970-01-01T06:00 | 40,587 | 40,587.25 |
+ * | 1970-01-01T12:00 | 40,587 | 40,587.5 |
+ * | 1970-01-01T18:00 | 40,587 | 40,587.75 |
+ * | 1970-01-02T00:00 | 40,588 | 40,588.0 |
+ * | 1970-01-02T06:00 | 40,588 | 40,588.25 |
+ * | 1970-01-02T12:00 | 40,588 | 40,588.5 |
+ * </pre>
+ * <p>
+ * Modified Julian Days are sometimes taken to imply Universal Time or UTC, but this
+ * implementation always uses the Modified Julian Day for the local date,
+ * regardless of the offset or time-zone.
+ */
+ public static final TemporalField MODIFIED_JULIAN_DAY = new Field("ModifiedJulianDay", DAYS, FOREVER, 40587L);
+
+ /**
+ * Rata Die field.
+ * <p>
+ * Rata Die counts whole days continuously starting day 1 at midnight at the beginning of 0001-01-01 (ISO).
+ * The field always refers to the local date-time, ignoring the offset or zone.
+ * <p>
+ * For date-times, 'RATA_DIE.doGet()' assumes the same value from
+ * midnight until just before the next midnight.
+ * When 'RATA_DIE.doWith()' is applied to a date-time, the time of day portion remains unaltered.
+ * 'MODIFIED_JULIAN_DAY.doWith()' and 'RATA_DIE.doGet()' only apply to {@code Temporal} objects
+ * that can be converted into {@link ChronoField#EPOCH_DAY}.
+ * A {@link DateTimeException} is thrown for any other type of object.
+ */
+ public static final TemporalField RATA_DIE = new Field("RataDie", DAYS, FOREVER, 719163L);
+
+ /**
+ * Restricted constructor.
+ */
+ private JulianFields() {
+ throw new AssertionError("Not instantiable");
+ }
+
+ /**
+ * implementation of JulianFields. Each instance is a singleton.
+ */
+ private static class Field implements TemporalField, Serializable {
+
+ private static final long serialVersionUID = -7501623920830201812L;
+
+ private final String name;
+ private final transient TemporalUnit baseUnit;
+ private final transient TemporalUnit rangeUnit;
+ private final transient ValueRange range;
+ private final transient long offset;
+
+ private Field(String name, TemporalUnit baseUnit, TemporalUnit rangeUnit, long offset) {
+ this.name = name;
+ this.baseUnit = baseUnit;
+ this.rangeUnit = rangeUnit;
+ this.range = ValueRange.of(-365243219162L + offset, 365241780471L + offset);
+ this.offset = offset;
+ }
+
+
+ /**
+ * Resolve the object from the stream to the appropriate singleton.
+ * @return one of the singleton objects {@link #JULIAN_DAY},
+ * {@link #MODIFIED_JULIAN_DAY}, or {@link #RATA_DIE}.
+ * @throws InvalidObjectException if the object in the stream is not one of the singletons.
+ */
+ private Object readResolve() throws InvalidObjectException {
+ if (JULIAN_DAY.getName().equals(name)) {
+ return JULIAN_DAY;
+ } else if (MODIFIED_JULIAN_DAY.getName().equals(name)) {
+ return MODIFIED_JULIAN_DAY;
+ } else if (RATA_DIE.getName().equals(name)) {
+ return RATA_DIE;
+ } else {
+ throw new InvalidObjectException("Not one of the singletons");
+ }
+ }
+
+ //-----------------------------------------------------------------------
+ @Override
+ public String getName() {
+ return name;
+ }
+
+ @Override
+ public TemporalUnit getBaseUnit() {
+ return baseUnit;
+ }
+
+ @Override
+ public TemporalUnit getRangeUnit() {
+ return rangeUnit;
+ }
+
+ @Override
+ public ValueRange range() {
+ return range;
+ }
+
+ //-----------------------------------------------------------------------
+ @Override
+ public boolean doIsSupported(TemporalAccessor temporal) {
+ return temporal.isSupported(EPOCH_DAY);
+ }
+
+ @Override
+ public ValueRange doRange(TemporalAccessor temporal) {
+ if (doIsSupported(temporal) == false) {
+ throw new DateTimeException("Unsupported field: " + this);
+ }
+ return range();
+ }
+
+ @Override
+ public long doGet(TemporalAccessor temporal) {
+ return temporal.getLong(EPOCH_DAY) + offset;
+ }
+
+ @Override
+ public <R extends Temporal> R doWith(R temporal, long newValue) {
+ if (range().isValidValue(newValue) == false) {
+ throw new DateTimeException("Invalid value: " + name + " " + newValue);
+ }
+ return (R) temporal.with(EPOCH_DAY, Math.subtractExact(newValue, offset));
+ }
+
+ //-----------------------------------------------------------------------
+ @Override
+ public boolean resolve(DateTimeBuilder builder, long value) {
+ boolean changed = false;
+ changed = resolve0(JULIAN_DAY, builder, changed);
+ changed = resolve0(MODIFIED_JULIAN_DAY, builder, changed);
+ changed = resolve0(RATA_DIE, builder, changed);
+ return changed;
+ }
+
+ private boolean resolve0(TemporalField field, DateTimeBuilder builder, boolean changed) {
+ if (builder.containsFieldValue(field)) {
+ builder.addCalendrical(LocalDate.ofEpochDay(Math.subtractExact(builder.getFieldValue(JULIAN_DAY), JULIAN_DAY_OFFSET)));
+ builder.removeFieldValue(JULIAN_DAY);
+ changed = true;
+ }
+ return changed;
+ }
+
+ //-----------------------------------------------------------------------
+ @Override
+ public String toString() {
+ return getName();
+ }
+ }
+}