| /* |
| * 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) 2009-2012, 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 build.tools.tzdb; |
| |
| import java.util.Objects; |
| |
| /** |
| * A definition of the way a local time can be converted to the actual |
| * transition date-time. |
| * <p> |
| * Time zone rules are expressed in one of three ways: |
| * <p><ul> |
| * <li>Relative to UTC</li> |
| * <li>Relative to the standard offset in force</li> |
| * <li>Relative to the wall offset (what you would see on a clock on the wall)</li> |
| * </ul><p> |
| */ |
| public enum TimeDefinition { |
| /** The local date-time is expressed in terms of the UTC offset. */ |
| UTC, |
| /** The local date-time is expressed in terms of the wall offset. */ |
| WALL, |
| /** The local date-time is expressed in terms of the standard offset. */ |
| STANDARD; |
| |
| /** |
| * Converts the specified local date-time to the local date-time actually |
| * seen on a wall clock. |
| * <p> |
| * This method converts using the type of this enum. |
| * The output is defined relative to the 'before' offset of the transition. |
| * <p> |
| * The UTC type uses the UTC offset. |
| * The STANDARD type uses the standard offset. |
| * The WALL type returns the input date-time. |
| * The result is intended for use with the wall-offset. |
| * |
| * @param dateTime the local date-time, not null |
| * @param standardOffset the standard offset, not null |
| * @param wallOffset the wall offset, not null |
| * @return the date-time relative to the wall/before offset, not null |
| */ |
| public LocalDateTime createDateTime(LocalDateTime dateTime, ZoneOffset standardOffset, ZoneOffset wallOffset) { |
| switch (this) { |
| case UTC: { |
| int difference = wallOffset.getTotalSeconds() - ZoneOffset.UTC.getTotalSeconds(); |
| return dateTime.plusSeconds(difference); |
| } |
| case STANDARD: { |
| int difference = wallOffset.getTotalSeconds() - standardOffset.getTotalSeconds(); |
| return dateTime.plusSeconds(difference); |
| } |
| default: // WALL |
| return dateTime; |
| } |
| } |
| |
| } |