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/*
* 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) 2008-2012, 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.
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*/
package java.time.format;
/**
* Enumeration of ways to handle the positive/negative sign.
* <p>
* The formatting engine allows the positive and negative signs of numbers
* to be controlled using this enum.
* See {@link DateTimeFormatterBuilder} for usage.
*
* @implSpec
* This is an immutable and thread-safe enum.
*
* @since 1.8
*/
public enum SignStyle {
/**
* Style to output the sign only if the value is negative.
* <p>
* In strict parsing, the negative sign will be accepted and the positive sign rejected.
* In lenient parsing, any sign will be accepted.
*/
NORMAL,
/**
* Style to always output the sign, where zero will output '+'.
* <p>
* In strict parsing, the absence of a sign will be rejected.
* In lenient parsing, any sign will be accepted, with the absence
* of a sign treated as a positive number.
*/
ALWAYS,
/**
* Style to never output sign, only outputting the absolute value.
* <p>
* In strict parsing, any sign will be rejected.
* In lenient parsing, any sign will be accepted unless the width is fixed.
*/
NEVER,
/**
* Style to block negative values, throwing an exception on printing.
* <p>
* In strict parsing, any sign will be rejected.
* In lenient parsing, any sign will be accepted unless the width is fixed.
*/
NOT_NEGATIVE,
/**
* Style to always output the sign if the value exceeds the pad width.
* A negative value will always output the '-' sign.
* <p>
* In strict parsing, the sign will be rejected unless the pad width is exceeded.
* In lenient parsing, any sign will be accepted, with the absence
* of a sign treated as a positive number.
*/
EXCEEDS_PAD;
/**
* Parse helper.
*
* @param positive true if positive sign parsed, false for negative sign
* @param strict true if strict, false if lenient
* @param fixedWidth true if fixed width, false if not
* @return
*/
boolean parse(boolean positive, boolean strict, boolean fixedWidth) {
switch (ordinal()) {
case 0: // NORMAL
// valid if negative or (positive and lenient)
return !positive || !strict;
case 1: // ALWAYS
case 4: // EXCEEDS_PAD
return true;
default:
// valid if lenient and not fixed width
return !strict && !fixedWidth;
}
}
}