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1 /* |
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2 * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 |
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26 /* |
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27 * This file is available under and governed by the GNU General Public |
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28 * License version 2 only, as published by the Free Software Foundation. |
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29 * However, the following notice accompanied the original version of this |
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30 * file: |
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31 * |
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32 * Copyright (c) 2008-2012, Stephen Colebourne & Michael Nascimento Santos |
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33 * |
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34 * All rights reserved. |
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35 * |
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36 * Redistribution and use in source and binary forms, with or without |
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37 * modification, are permitted provided that the following conditions are met: |
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38 * |
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39 * * Redistributions of source code must retain the above copyright notice, |
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40 * this list of conditions and the following disclaimer. |
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41 * |
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42 * * Redistributions in binary form must reproduce the above copyright notice, |
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43 * this list of conditions and the following disclaimer in the documentation |
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44 * and/or other materials provided with the distribution. |
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45 * |
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46 * * Neither the name of JSR-310 nor the names of its contributors |
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47 * may be used to endorse or promote products derived from this software |
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48 * without specific prior written permission. |
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49 * |
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50 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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51 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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52 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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53 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
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54 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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55 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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56 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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57 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
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58 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
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59 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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60 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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61 */ |
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62 package java.time.format; |
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63 |
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64 /** |
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65 * Enumeration of ways to handle the positive/negative sign. |
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66 * <p> |
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67 * The formatting engine allows the positive and negative signs of numbers |
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68 * to be controlled using this enum. |
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69 * See {@link DateTimeFormatterBuilder} for usage. |
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70 * |
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71 * <h3>Specification for implementors</h3> |
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72 * This is an immutable and thread-safe enum. |
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73 * |
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74 * @since 1.8 |
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75 */ |
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76 public enum SignStyle { |
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77 |
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78 /** |
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79 * Style to output the sign only if the value is negative. |
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80 * <p> |
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81 * In strict parsing, the negative sign will be accepted and the positive sign rejected. |
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82 * In lenient parsing, any sign will be accepted. |
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83 */ |
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84 NORMAL, |
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85 /** |
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86 * Style to always output the sign, where zero will output '+'. |
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87 * <p> |
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88 * In strict parsing, the absence of a sign will be rejected. |
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89 * In lenient parsing, any sign will be accepted, with the absence |
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90 * of a sign treated as a positive number. |
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91 */ |
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92 ALWAYS, |
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93 /** |
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94 * Style to never output sign, only outputting the absolute value. |
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95 * <p> |
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96 * In strict parsing, any sign will be rejected. |
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97 * In lenient parsing, any sign will be accepted unless the width is fixed. |
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98 */ |
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99 NEVER, |
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100 /** |
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101 * Style to block negative values, throwing an exception on printing. |
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102 * <p> |
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103 * In strict parsing, any sign will be rejected. |
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104 * In lenient parsing, any sign will be accepted unless the width is fixed. |
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105 */ |
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106 NOT_NEGATIVE, |
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107 /** |
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108 * Style to always output the sign if the value exceeds the pad width. |
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109 * A negative value will always output the '-' sign. |
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110 * <p> |
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111 * In strict parsing, the sign will be rejected unless the pad width is exceeded. |
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112 * In lenient parsing, any sign will be accepted, with the absence |
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113 * of a sign treated as a positive number. |
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114 */ |
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115 EXCEEDS_PAD; |
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116 |
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117 /** |
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118 * Parse helper. |
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119 * |
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120 * @param positive true if positive sign parsed, false for negative sign |
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121 * @param strict true if strict, false if lenient |
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122 * @param fixedWidth true if fixed width, false if not |
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123 * @return |
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124 */ |
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125 boolean parse(boolean positive, boolean strict, boolean fixedWidth) { |
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126 switch (ordinal()) { |
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127 case 0: // NORMAL |
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128 // valid if negative or (positive and lenient) |
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129 return !positive || !strict; |
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130 case 1: // ALWAYS |
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131 case 4: // EXCEEDS_PAD |
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132 return true; |
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133 default: |
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134 // valid if lenient and not fixed width |
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135 return !strict && !fixedWidth; |
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136 } |
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137 } |
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138 |
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139 } |