diff -r c588664d547e -r 55b829ca2334 jdk/src/share/classes/java/time/temporal/TemporalSubtractor.java --- a/jdk/src/share/classes/java/time/temporal/TemporalSubtractor.java Tue Feb 12 16:02:14 2013 +0400 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,139 +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 java.time.DateTimeException; -import java.time.Duration; -import java.time.Period; - -/** - * Strategy for subtracting from a temporal object. - *

- * Subtractors are a key tool for modifying temporal objects. - * They exist to externalize the process of subtraction, permitting different - * approaches, as per the strategy design pattern. - *

- * There are two equivalent ways of using a {@code TemporalSubtractor}. - * The first is to invoke the method on this interface directly. - * The second is to use {@link Temporal#minus(TemporalSubtractor)}: - * 

- *   // these two lines are equivalent, but the second approach is recommended
- *   dateTime = subtractor.subtractFrom(dateTime);
- *   dateTime = dateTime.minus(subtractor);
- *
- * It is recommended to use the second approach, {@code minus(TemporalSubtractor)}, - * as it is a lot clearer to read in code. - *

- * The {@link Period} and {@link Duration} classes implement this interface. - * Subtractors may also be defined by applications. - * - *

Specification for implementors

- * This interface places no restrictions on the mutability of implementations, - * however immutability is strongly recommended. - * - * @since 1.8 - */ -public interface TemporalSubtractor { - - /** - * Subtracts this object from the specified temporal object. - *

- * This adds to the specified temporal object using the logic - * encapsulated in the implementing class. - *

- * There are two equivalent ways of using this method. - * The first is to invoke this method directly. - * The second is to use {@link Temporal#minus(TemporalSubtractor)}: - * 

-     *   // these two lines are equivalent, but the second approach is recommended
-     *   dateTime = subtractor.subtractFrom(dateTime);
-     *   dateTime = dateTime.minus(subtractor);
-     *
- * It is recommended to use the second approach, {@code minus(TemporalSubtractor)}, - * as it is a lot clearer to read in code. - * - *

Specification for implementors

- * The implementation must take the input object and subtract from it. - * The implementation defines the logic of the subtraction and is responsible for - * documenting that logic. It may use any method on {@code Temporal} to - * query the temporal object and perform the subtraction. - * The returned object must have the same observable type as the input object - *

- * The input object must not be altered. - * Instead, an adjusted copy of the original must be returned. - * This provides equivalent, safe behavior for immutable and mutable temporal objects. - *

- * The input temporal object may be in a calendar system other than ISO. - * Implementations may choose to document compatibility with other calendar systems, - * or reject non-ISO temporal objects by {@link Queries#chrono() querying the chronology}. - *

- * This method may be called from multiple threads in parallel. - * It must be thread-safe when invoked. - * - * @param temporal the temporal object to adjust, not null - * @return an object of the same observable type with the subtraction made, not null - * @throws DateTimeException if unable to subtract - * @throws ArithmeticException if numeric overflow occurs - */ - Temporal subtractFrom(Temporal temporal); - -}