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17 package org.apache.commons.validator.routines;
18
19 import java.text.Format;
20 import java.util.Locale;
21
22 /***
23 * <p><b>Long Validation</b> and Conversion routines (<code>java.lang.Long</code>).</p>
24 *
25 * <p>This validator provides a number of methods for
26 * validating/converting a <code>String</code> value to
27 * a <code>Long</code> using <code>java.text.NumberFormat</code>
28 * to parse either:</p>
29 * <ul>
30 * <li>using the default format for the default <code>Locale</code></li>
31 * <li>using a specified pattern with the default <code>Locale</code></li>
32 * <li>using the default format for a specified <code>Locale</code></li>
33 * <li>using a specified pattern with a specified <code>Locale</code></li>
34 * </ul>
35 *
36 * <p>Use one of the <code>isValid()</code> methods to just validate or
37 * one of the <code>validate()</code> methods to validate and receive a
38 * <i>converted</i> <code>Long</code> value.</p>
39 *
40 * <p>Once a value has been sucessfully converted the following
41 * methods can be used to perform minimum, maximum and range checks:</p>
42 * <ul>
43 * <li><code>minValue()</code> checks whether the value is greater
44 * than or equal to a specified minimum.</li>
45 * <li><code>maxValue()</code> checks whether the value is less
46 * than or equal to a specified maximum.</li>
47 * <li><code>isInRange()</code> checks whether the value is within
48 * a specified range of values.</li>
49 * </ul>
50 *
51 * <p>So that the same mechanism used for parsing an <i>input</i> value
52 * for validation can be used to format <i>output</i>, corresponding
53 * <code>format()</code> methods are also provided. That is you can
54 * format either:</p>
55 * <ul>
56 * <li>using a specified pattern</li>
57 * <li>using the format for a specified <code>Locale</code></li>
58 * <li>using the format for the <i>default</i> <code>Locale</code></li>
59 * </ul>
60 *
61 * @version $Revision: 478334 $ $Date: 2006-11-22 21:31:54 +0000 (Wed, 22 Nov 2006) $
62 * @since Validator 1.3.0
63 */
64 public class LongValidator extends AbstractNumberValidator {
65
66 private static final LongValidator VALIDATOR = new LongValidator();
67
68 /***
69 * Return a singleton instance of this validator.
70 * @return A singleton instance of the LongValidator.
71 */
72 public static LongValidator getInstance() {
73 return VALIDATOR;
74 }
75
76 /***
77 * Construct a <i>strict</i> instance.
78 */
79 public LongValidator() {
80 this(true, STANDARD_FORMAT);
81 }
82
83 /***
84 * <p>Construct an instance with the specified strict setting
85 * and format type.</p>
86 *
87 * <p>The <code>formatType</code> specified what type of
88 * <code>NumberFormat</code> is created - valid types
89 * are:</p>
90 * <ul>
91 * <li>AbstractNumberValidator.STANDARD_FORMAT -to create
92 * <i>standard</i> number formats (the default).</li>
93 * <li>AbstractNumberValidator.CURRENCY_FORMAT -to create
94 * <i>currency</i> number formats.</li>
95 * <li>AbstractNumberValidator.PERCENT_FORMAT -to create
96 * <i>percent</i> number formats (the default).</li>
97 * </ul>
98 *
99 * @param strict <code>true</code> if strict
100 * <code>Format</code> parsing should be used.
101 * @param formatType The <code>NumberFormat</code> type to
102 * create for validation, default is STANDARD_FORMAT.
103 */
104 public LongValidator(boolean strict, int formatType) {
105 super(strict, formatType, false);
106 }
107
108 /***
109 * <p>Validate/convert a <code>Long</code> using the default
110 * <code>Locale</code>.
111 *
112 * @param value The value validation is being performed on.
113 * @return The parsed <code>Long</code> if valid or <code>null</code>
114 * if invalid.
115 */
116 public Long validate(String value) {
117 return (Long)parse(value, (String)null, (Locale)null);
118 }
119
120 /***
121 * <p>Validate/convert a <code>Long</code> using the
122 * specified <i>pattern</i>.
123 *
124 * @param value The value validation is being performed on.
125 * @param pattern The pattern used to validate the value against.
126 * @return The parsed <code>Long</code> if valid or <code>null</code> if invalid.
127 */
128 public Long validate(String value, String pattern) {
129 return (Long)parse(value, pattern, (Locale)null);
130 }
131
132 /***
133 * <p>Validate/convert a <code>Long</code> using the
134 * specified <code>Locale</code>.
135 *
136 * @param value The value validation is being performed on.
137 * @param locale The locale to use for the number format, system default if null.
138 * @return The parsed <code>Long</code> if valid or <code>null</code> if invalid.
139 */
140 public Long validate(String value, Locale locale) {
141 return (Long)parse(value, (String)null, locale);
142 }
143
144 /***
145 * <p>Validate/convert a <code>Long</code> using the
146 * specified pattern and/ or <code>Locale</code>.
147 *
148 * @param value The value validation is being performed on.
149 * @param pattern The pattern used to validate the value against, or the
150 * default for the <code>Locale</code> if <code>null</code>.
151 * @param locale The locale to use for the date format, system default if null.
152 * @return The parsed <code>Long</code> if valid or <code>null</code> if invalid.
153 */
154 public Long validate(String value, String pattern, Locale locale) {
155 return (Long)parse(value, pattern, locale);
156 }
157
158 /***
159 * Check if the value is within a specified range.
160 *
161 * @param value The <code>Number</code> value to check.
162 * @param min The minimum value of the range.
163 * @param max The maximum value of the range.
164 * @return <code>true</code> if the value is within the
165 * specified range.
166 */
167 public boolean isInRange(long value, long min, long max) {
168 return (value >= min && value <= max);
169 }
170
171 /***
172 * Check if the value is within a specified range.
173 *
174 * @param value The <code>Number</code> value to check.
175 * @param min The minimum value of the range.
176 * @param max The maximum value of the range.
177 * @return <code>true</code> if the value is within the
178 * specified range.
179 */
180 public boolean isInRange(Long value, long min, long max) {
181 return isInRange(value.longValue(), min, max);
182 }
183
184 /***
185 * Check if the value is greater than or equal to a minimum.
186 *
187 * @param value The value validation is being performed on.
188 * @param min The minimum value.
189 * @return <code>true</code> if the value is greater than
190 * or equal to the minimum.
191 */
192 public boolean minValue(long value, long min) {
193 return (value >= min);
194 }
195
196 /***
197 * Check if the value is greater than or equal to a minimum.
198 *
199 * @param value The value validation is being performed on.
200 * @param min The minimum value.
201 * @return <code>true</code> if the value is greater than
202 * or equal to the minimum.
203 */
204 public boolean minValue(Long value, long min) {
205 return minValue(value.longValue(), min);
206 }
207
208 /***
209 * Check if the value is less than or equal to a maximum.
210 *
211 * @param value The value validation is being performed on.
212 * @param max The maximum value.
213 * @return <code>true</code> if the value is less than
214 * or equal to the maximum.
215 */
216 public boolean maxValue(long value, long max) {
217 return (value <= max);
218 }
219
220 /***
221 * Check if the value is less than or equal to a maximum.
222 *
223 * @param value The value validation is being performed on.
224 * @param max The maximum value.
225 * @return <code>true</code> if the value is less than
226 * or equal to the maximum.
227 */
228 public boolean maxValue(Long value, long max) {
229 return maxValue(value.longValue(), max);
230 }
231
232 /***
233 * Convert the parsed value to a <code>Long</code>.
234 *
235 * @param value The parsed <code>Number</code> object created.
236 * @param formatter The Format used to parse the value with.
237 * @return The parsed <code>Number</code> converted to a
238 * <code>Long</code>.
239 */
240 protected Object processParsedValue(Object value, Format formatter) {
241
242 if (value instanceof Long) {
243 return value;
244 } else {
245 return new Long(((Number)value).longValue());
246 }
247
248 }
249 }