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org.apache.commons.validator.routines.ShortValidator |
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1 | /* |
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2 | * Licensed to the Apache Software Foundation (ASF) under one or more |
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3 | * contributor license agreements. See the NOTICE file distributed with |
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4 | * this work for additional information regarding copyright ownership. |
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5 | * The ASF licenses this file to You under the Apache License, Version 2.0 |
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6 | * (the "License"); you may not use this file except in compliance with |
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7 | * the License. You may obtain a copy of the License at |
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8 | * |
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9 | * http://www.apache.org/licenses/LICENSE-2.0 |
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10 | * |
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11 | * Unless required by applicable law or agreed to in writing, software |
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12 | * distributed under the License is distributed on an "AS IS" BASIS, |
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13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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14 | * See the License for the specific language governing permissions and |
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15 | * limitations under the License. |
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16 | */ |
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17 | package org.apache.commons.validator.routines; |
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18 | ||
19 | import java.text.Format; |
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20 | import java.util.Locale; |
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21 | ||
22 | /** |
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23 | * <p><b>Short Validation</b> and Conversion routines (<code>java.lang.Short</code>).</p> |
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24 | * |
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25 | * <p>This validator provides a number of methods for |
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26 | * validating/converting a <code>String</code> value to |
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27 | * a <code>Short</code> using <code>java.text.NumberFormat</code> |
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28 | * to parse either:</p> |
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29 | * <ul> |
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30 | * <li>using the default format for the default <code>Locale</code></li> |
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31 | * <li>using a specified pattern with the default <code>Locale</code></li> |
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32 | * <li>using the default format for a specified <code>Locale</code></li> |
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33 | * <li>using a specified pattern with a specified <code>Locale</code></li> |
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34 | * </ul> |
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35 | * |
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36 | * <p>Use one of the <code>isValid()</code> methods to just validate or |
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37 | * one of the <code>validate()</code> methods to validate and receive a |
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38 | * <i>converted</i> <code>Short</code> value.</p> |
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39 | * |
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40 | * <p>Once a value has been sucessfully converted the following |
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41 | * methods can be used to perform minimum, maximum and range checks:</p> |
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42 | * <ul> |
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43 | * <li><code>minValue()</code> checks whether the value is greater |
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44 | * than or equal to a specified minimum.</li> |
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45 | * <li><code>maxValue()</code> checks whether the value is less |
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46 | * than or equal to a specified maximum.</li> |
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47 | * <li><code>isInRange()</code> checks whether the value is within |
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48 | * a specified range of values.</li> |
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49 | * </ul> |
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50 | * |
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51 | * <p>So that the same mechanism used for parsing an <i>input</i> value |
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52 | * for validation can be used to format <i>output</i>, corresponding |
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53 | * <code>format()</code> methods are also provided. That is you can |
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54 | * format either:</p> |
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55 | * <ul> |
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56 | * <li>using the default format for the default <code>Locale</code></li> |
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57 | * <li>using a specified pattern with the default <code>Locale</code></li> |
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58 | * <li>using the default format for a specified <code>Locale</code></li> |
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59 | * <li>using a specified pattern with a specified <code>Locale</code></li> |
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60 | * </ul> |
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61 | * |
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62 | * @version $Revision: 478334 $ $Date: 2006-11-22 21:31:54 +0000 (Wed, 22 Nov 2006) $ |
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63 | * @since Validator 1.3.0 |
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64 | */ |
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65 | public class ShortValidator extends AbstractNumberValidator { |
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66 | ||
67 | 1 | private static final ShortValidator VALIDATOR = new ShortValidator(); |
68 | ||
69 | /** |
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70 | * Return a singleton instance of this validator. |
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71 | * @return A singleton instance of the ShortValidator. |
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72 | */ |
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73 | public static ShortValidator getInstance() { |
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74 | 16 | return VALIDATOR; |
75 | } |
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76 | ||
77 | /** |
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78 | * Construct a <i>strict</i> instance. |
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79 | */ |
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80 | public ShortValidator() { |
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81 | 12 | this(true, STANDARD_FORMAT); |
82 | 12 | } |
83 | ||
84 | /** |
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85 | * <p>Construct an instance with the specified strict setting |
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86 | * and format type.</p> |
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87 | * |
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88 | * <p>The <code>formatType</code> specified what type of |
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89 | * <code>NumberFormat</code> is created - valid types |
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90 | * are:</p> |
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91 | * <ul> |
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92 | * <li>AbstractNumberValidator.STANDARD_FORMAT -to create |
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93 | * <i>standard</i> number formats (the default).</li> |
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94 | * <li>AbstractNumberValidator.CURRENCY_FORMAT -to create |
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95 | * <i>currency</i> number formats.</li> |
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96 | * <li>AbstractNumberValidator.PERCENT_FORMAT -to create |
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97 | * <i>percent</i> number formats (the default).</li> |
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98 | * </ul> |
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99 | * |
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100 | * @param strict <code>true</code> if strict |
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101 | * <code>Format</code> parsing should be used. |
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102 | * @param formatType The <code>NumberFormat</code> type to |
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103 | * create for validation, default is STANDARD_FORMAT. |
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104 | */ |
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105 | public ShortValidator(boolean strict, int formatType) { |
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106 | 23 | super(strict, formatType, false); |
107 | 23 | } |
108 | ||
109 | /** |
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110 | * <p>Validate/convert a <code>Short</code> using the default |
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111 | * <code>Locale</code>. |
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112 | * |
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113 | * @param value The value validation is being performed on. |
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114 | * @return The parsed <code>Short</code> if valid or <code>null</code> |
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115 | * if invalid. |
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116 | */ |
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117 | public Short validate(String value) { |
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118 | 2 | return (Short)parse(value, (String)null, (Locale)class="keyword">null); |
119 | } |
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120 | ||
121 | /** |
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122 | * <p>Validate/convert a <code>Short</code> using the |
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123 | * specified <i>pattern</i>. |
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124 | * |
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125 | * @param value The value validation is being performed on. |
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126 | * @param pattern The pattern used to validate the value against. |
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127 | * @return The parsed <code>Short</code> if valid or <code>null</code> if invalid. |
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128 | */ |
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129 | public Short validate(String value, String pattern) { |
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130 | 8 | return (Short)parse(value, pattern, (Locale)null); |
131 | } |
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132 | ||
133 | /** |
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134 | * <p>Validate/convert a <code>Short</code> using the |
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135 | * specified <code>Locale</code>. |
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136 | * |
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137 | * @param value The value validation is being performed on. |
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138 | * @param locale The locale to use for the number format, system default if null. |
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139 | * @return The parsed <code>Short</code> if valid or <code>null</code> if invalid. |
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140 | */ |
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141 | public Short validate(String value, Locale locale) { |
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142 | 2 | return (Short)parse(value, (String)null, locale); |
143 | } |
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144 | ||
145 | /** |
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146 | * <p>Validate/convert a <code>Short</code> using the |
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147 | * specified pattern and/ or <code>Locale</code>. |
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148 | * |
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149 | * @param value The value validation is being performed on. |
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150 | * @param pattern The pattern used to validate the value against, or the |
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151 | * default for the <code>Locale</code> if <code>null</code>. |
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152 | * @param locale The locale to use for the date format, system default if null. |
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153 | * @return The parsed <code>Short</code> if valid or <code>null</code> if invalid. |
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154 | */ |
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155 | public Short validate(String value, String pattern, Locale locale) { |
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156 | 2 | return (Short)parse(value, pattern, locale); |
157 | } |
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158 | ||
159 | /** |
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160 | * Check if the value is within a specified range. |
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161 | * |
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162 | * @param value The <code>Number</code> value to check. |
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163 | * @param min The minimum value of the range. |
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164 | * @param max The maximum value of the range. |
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165 | * @return <code>true</code> if the value is within the |
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166 | * specified range. |
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167 | */ |
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168 | public boolean isInRange(short value, class="keyword">short min, class="keyword">short max) { |
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169 | 5 | return (value >= min && value <= max); |
170 | } |
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171 | ||
172 | /** |
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173 | * Check if the value is within a specified range. |
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174 | * |
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175 | * @param value The <code>Number</code> value to check. |
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176 | * @param min The minimum value of the range. |
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177 | * @param max The maximum value of the range. |
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178 | * @return <code>true</code> if the value is within the |
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179 | * specified range. |
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180 | */ |
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181 | public boolean isInRange(Short value, short min, class="keyword">short max) { |
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182 | 5 | return isInRange(value.shortValue(), min, max); |
183 | } |
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184 | ||
185 | /** |
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186 | * Check if the value is greater than or equal to a minimum. |
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187 | * |
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188 | * @param value The value validation is being performed on. |
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189 | * @param min The minimum value. |
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190 | * @return <code>true</code> if the value is greater than |
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191 | * or equal to the minimum. |
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192 | */ |
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193 | public boolean minValue(short value, class="keyword">short min) { |
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194 | 3 | return (value >= min); |
195 | } |
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196 | ||
197 | /** |
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198 | * Check if the value is greater than or equal to a minimum. |
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199 | * |
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200 | * @param value The value validation is being performed on. |
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201 | * @param min The minimum value. |
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202 | * @return <code>true</code> if the value is greater than |
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203 | * or equal to the minimum. |
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204 | */ |
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205 | public boolean minValue(Short value, short min) { |
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206 | 3 | return minValue(value.shortValue(), min); |
207 | } |
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208 | ||
209 | /** |
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210 | * Check if the value is less than or equal to a maximum. |
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211 | * |
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212 | * @param value The value validation is being performed on. |
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213 | * @param max The maximum value. |
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214 | * @return <code>true</code> if the value is less than |
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215 | * or equal to the maximum. |
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216 | */ |
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217 | public boolean maxValue(short value, class="keyword">short max) { |
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218 | 3 | return (value <= max); |
219 | } |
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220 | ||
221 | /** |
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222 | * Check if the value is less than or equal to a maximum. |
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223 | * |
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224 | * @param value The value validation is being performed on. |
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225 | * @param max The maximum value. |
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226 | * @return <code>true</code> if the value is less than |
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227 | * or equal to the maximum. |
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228 | */ |
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229 | public boolean maxValue(Short value, short max) { |
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230 | 3 | return maxValue(value.shortValue(), max); |
231 | } |
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232 | ||
233 | /** |
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234 | * <p>Perform further validation and convert the <code>Number</code> to |
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235 | * a <code>Short</code>.</p> |
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236 | * |
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237 | * @param value The parsed <code>Number</code> object created. |
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238 | * @param formatter The Format used to parse the value with. |
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239 | * @return The parsed <code>Number</code> converted to a |
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240 | * <code>Short</code> if valid or <code>null</code> if invalid. |
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241 | */ |
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242 | protected Object processParsedValue(Object value, Format formatter) { |
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243 | ||
244 | 53 | long class="keyword">longValue = ((Number)value).class="keyword">longValue(); |
245 | ||
246 | 53 | if (longValue < Short.MIN_VALUE || |
247 | longValue > Short.MAX_VALUE) { |
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248 | 2 | return null; |
249 | } else { |
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250 | 51 | return new Short((short)longValue); |
251 | } |
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252 | } |
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253 | } |
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