140 lines
5.4 KiB
Java
140 lines
5.4 KiB
Java
/*
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* Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* This file is available under and governed by the GNU General Public
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* License version 2 only, as published by the Free Software Foundation.
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* However, the following notice accompanied the original version of this
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* file:
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*
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* Copyright (c) 2008-2012, Stephen Colebourne & Michael Nascimento Santos
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* * Neither the name of JSR-310 nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package java.time.format;
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/**
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* Enumeration of ways to handle the positive/negative sign.
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* <p>
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* The formatting engine allows the positive and negative signs of numbers
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* to be controlled using this enum.
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* See {@link DateTimeFormatterBuilder} for usage.
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*
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* @implSpec
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* This is an immutable and thread-safe enum.
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*
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* @since 1.8
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*/
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public enum SignStyle {
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/**
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* Style to output the sign only if the value is negative.
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* <p>
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* In strict parsing, the negative sign will be accepted and the positive sign rejected.
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* In lenient parsing, any sign will be accepted.
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*/
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NORMAL,
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/**
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* Style to always output the sign, where zero will output '+'.
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* <p>
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* In strict parsing, the absence of a sign will be rejected.
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* In lenient parsing, any sign will be accepted, with the absence
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* of a sign treated as a positive number.
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*/
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ALWAYS,
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/**
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* Style to never output sign, only outputting the absolute value.
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* <p>
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* In strict parsing, any sign will be rejected.
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* In lenient parsing, any sign will be accepted unless the width is fixed.
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*/
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NEVER,
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/**
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* Style to block negative values, throwing an exception on printing.
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* <p>
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* In strict parsing, any sign will be rejected.
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* In lenient parsing, any sign will be accepted unless the width is fixed.
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*/
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NOT_NEGATIVE,
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/**
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* Style to always output the sign if the value exceeds the pad width.
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* A negative value will always output the '-' sign.
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* <p>
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* In strict parsing, the sign will be rejected unless the pad width is exceeded.
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* In lenient parsing, any sign will be accepted, with the absence
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* of a sign treated as a positive number.
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*/
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EXCEEDS_PAD;
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/**
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* Parse helper.
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*
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* @param positive true if positive sign parsed, false for negative sign
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* @param strict true if strict, false if lenient
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* @param fixedWidth true if fixed width, false if not
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* @return
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*/
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boolean parse(boolean positive, boolean strict, boolean fixedWidth) {
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switch (ordinal()) {
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case 0: // NORMAL
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// valid if negative or (positive and lenient)
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return !positive || !strict;
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case 1: // ALWAYS
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case 4: // EXCEEDS_PAD
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return true;
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default:
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// valid if lenient and not fixed width
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return !strict && !fixedWidth;
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}
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}
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}
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