--- 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.
- * <p>
- * 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.
- * <p>
- * 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)}:
- * <pre>
- * // these two lines are equivalent, but the second approach is recommended
- * dateTime = subtractor.subtractFrom(dateTime);
- * dateTime = dateTime.minus(subtractor);
- * </pre>
- * It is recommended to use the second approach, {@code minus(TemporalSubtractor)},
- * as it is a lot clearer to read in code.
- * <p>
- * The {@link Period} and {@link Duration} classes implement this interface.
- * Subtractors may also be defined by applications.
- *
- * <h3>Specification for implementors</h3>
- * 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.
- * <p>
- * This adds to the specified temporal object using the logic
- * encapsulated in the implementing class.
- * <p>
- * 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)}:
- * <pre>
- * // these two lines are equivalent, but the second approach is recommended
- * dateTime = subtractor.subtractFrom(dateTime);
- * dateTime = dateTime.minus(subtractor);
- * </pre>
- * It is recommended to use the second approach, {@code minus(TemporalSubtractor)},
- * as it is a lot clearer to read in code.
- *
- * <h3>Specification for implementors</h3>
- * 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
- * <p>
- * 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.
- * <p>
- * 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}.
- * <p>
- * 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);
-
-}