Automatic sources dropoff on 2020-06-10 18:32:38.095721
The change is generated with prebuilt drop tool.
Change-Id: I24cbf6ba6db262a1ae1445db1427a08fee35b3b4
diff --git a/java/time/chrono/IsoEra.java b/java/time/chrono/IsoEra.java
new file mode 100644
index 0000000..bd29969
--- /dev/null
+++ b/java/time/chrono/IsoEra.java
@@ -0,0 +1,153 @@
+/*
+ * 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.chrono;
+
+import java.time.DateTimeException;
+
+/**
+ * An era in the ISO calendar system.
+ * <p>
+ * The ISO-8601 standard does not define eras.
+ * A definition has therefore been created with two eras - 'Current era' (CE) for
+ * years on or after 0001-01-01 (ISO), and 'Before current era' (BCE) for years before that.
+ *
+ * <table summary="ISO years and eras" cellpadding="2" cellspacing="3" border="0" >
+ * <thead>
+ * <tr class="tableSubHeadingColor">
+ * <th class="colFirst" align="left">year-of-era</th>
+ * <th class="colFirst" align="left">era</th>
+ * <th class="colLast" align="left">proleptic-year</th>
+ * </tr>
+ * </thead>
+ * <tbody>
+ * <tr class="rowColor">
+ * <td>2</td><td>CE</td><td>2</td>
+ * </tr>
+ * <tr class="altColor">
+ * <td>1</td><td>CE</td><td>1</td>
+ * </tr>
+ * <tr class="rowColor">
+ * <td>1</td><td>BCE</td><td>0</td>
+ * </tr>
+ * <tr class="altColor">
+ * <td>2</td><td>BCE</td><td>-1</td>
+ * </tr>
+ * </tbody>
+ * </table>
+ * <p>
+ * <b>Do not use {@code ordinal()} to obtain the numeric representation of {@code IsoEra}.
+ * Use {@code getValue()} instead.</b>
+ *
+ * @implSpec
+ * This is an immutable and thread-safe enum.
+ *
+ * @since 1.8
+ */
+public enum IsoEra implements Era {
+
+ /**
+ * The singleton instance for the era before the current one, 'Before Current Era',
+ * which has the numeric value 0.
+ */
+ BCE,
+ /**
+ * The singleton instance for the current era, 'Current Era',
+ * which has the numeric value 1.
+ */
+ CE;
+
+ //-----------------------------------------------------------------------
+ /**
+ * Obtains an instance of {@code IsoEra} from an {@code int} value.
+ * <p>
+ * {@code IsoEra} is an enum representing the ISO eras of BCE/CE.
+ * This factory allows the enum to be obtained from the {@code int} value.
+ *
+ * @param isoEra the BCE/CE value to represent, from 0 (BCE) to 1 (CE)
+ * @return the era singleton, not null
+ * @throws DateTimeException if the value is invalid
+ */
+ public static IsoEra of(int isoEra) {
+ switch (isoEra) {
+ case 0:
+ return BCE;
+ case 1:
+ return CE;
+ default:
+ throw new DateTimeException("Invalid era: " + isoEra);
+ }
+ }
+
+ //-----------------------------------------------------------------------
+ /**
+ * Gets the numeric era {@code int} value.
+ * <p>
+ * The era BCE has the value 0, while the era CE has the value 1.
+ *
+ * @return the era value, from 0 (BCE) to 1 (CE)
+ */
+ @Override
+ public int getValue() {
+ return ordinal();
+ }
+
+}