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26 /*
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29  * However, the following notice accompanied the original version of this
30  * file:
31  *
32  * Copyright (c) 2008-2012, Stephen Colebourne & Michael Nascimento Santos
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61  */
62 package java.time.format;
63 
64 /**
65  * Enumeration of ways to handle the positive/negative sign.
66  * <p>
67  * The formatting engine allows the positive and negative signs of numbers
68  * to be controlled using this enum.
69  * See {@link DateTimeFormatterBuilder} for usage.
70  *
71  * @implSpec
72  * This is an immutable and thread-safe enum.
73  *
74  * @since 1.8
75  */
76 public enum SignStyle {
77 
78     /**
79      * Style to output the sign only if the value is negative.
80      * <p>
81      * In strict parsing, the negative sign will be accepted and the positive sign rejected.
82      * In lenient parsing, any sign will be accepted.
83      */
84     NORMAL,
85     /**
86      * Style to always output the sign, where zero will output '+'.
87      * <p>
88      * In strict parsing, the absence of a sign will be rejected.
89      * In lenient parsing, any sign will be accepted, with the absence
90      * of a sign treated as a positive number.
91      */
92     ALWAYS,
93     /**
94      * Style to never output sign, only outputting the absolute value.
95      * <p>
96      * In strict parsing, any sign will be rejected.
97      * In lenient parsing, any sign will be accepted unless the width is fixed.
98      */
99     NEVER,
100     /**
101      * Style to block negative values, throwing an exception on printing.
102      * <p>
103      * In strict parsing, any sign will be rejected.
104      * In lenient parsing, any sign will be accepted unless the width is fixed.
105      */
106     NOT_NEGATIVE,
107     /**
108      * Style to always output the sign if the value exceeds the pad width.
109      * A negative value will always output the '-' sign.
110      * <p>
111      * In strict parsing, the sign will be rejected unless the pad width is exceeded.
112      * In lenient parsing, any sign will be accepted, with the absence
113      * of a sign treated as a positive number.
114      */
115     EXCEEDS_PAD;
116 
117     /**
118      * Parse helper.
119      *
120      * @param positive  true if positive sign parsed, false for negative sign
121      * @param strict  true if strict, false if lenient
122      * @param fixedWidth  true if fixed width, false if not
123      * @return
124      */
parse(boolean positive, boolean strict, boolean fixedWidth)125     boolean parse(boolean positive, boolean strict, boolean fixedWidth) {
126         switch (ordinal()) {
127             case 0: // NORMAL
128                 // valid if negative or (positive and lenient)
129                 return !positive || !strict;
130             case 1: // ALWAYS
131             case 4: // EXCEEDS_PAD
132                 return true;
133             default:
134                 // valid if lenient and not fixed width
135                 return !strict && !fixedWidth;
136         }
137     }
138 
139 }
140