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| 1 | /* | ||
| 2 | * Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package sun.util; | ||
| 27 | |||
| 28 | import java.io.IOException; | ||
| 29 | import java.io.ObjectInputStream; | ||
| 30 | import java.util.Calendar; | ||
| 31 | import java.util.GregorianCalendar; | ||
| 32 | import java.util.HashMap; | ||
| 33 | import java.util.Locale; | ||
| 34 | import java.util.Map; | ||
| 35 | import java.util.ResourceBundle; | ||
| 36 | import java.util.TimeZone; | ||
| 37 | import sun.util.resources.LocaleData; | ||
| 38 | |||
| 39 | public class BuddhistCalendar extends GregorianCalendar { | ||
| 40 | |||
| 41 | ////////////////// | ||
| 42 | // Class Variables | ||
| 43 | ////////////////// | ||
| 44 | |||
| 45 | private static final long serialVersionUID = -8527488697350388578L; | ||
| 46 | |||
| 47 | private static final int BUDDHIST_YEAR_OFFSET = 543; | ||
| 48 | |||
| 49 | /////////////// | ||
| 50 | // Constructors | ||
| 51 | /////////////// | ||
| 52 | |||
| 53 | /** | ||
| 54 | * Constructs a default BuddhistCalendar using the current time | ||
| 55 | * in the default time zone with the default locale. | ||
| 56 | */ | ||
| 57 | public BuddhistCalendar() { | ||
| 58 | super(); | ||
| 59 | } | ||
| 60 | |||
| 61 | /** | ||
| 62 | * Constructs a BuddhistCalendar based on the current time | ||
| 63 | * in the given time zone with the default locale. | ||
| 64 | * @param zone the given time zone. | ||
| 65 | */ | ||
| 66 | public BuddhistCalendar(TimeZone zone) { | ||
| 67 | super(zone); | ||
| 68 | } | ||
| 69 | |||
| 70 | /** | ||
| 71 | * Constructs a BuddhistCalendar based on the current time | ||
| 72 | * in the default time zone with the given locale. | ||
| 73 | * @param aLocale the given locale. | ||
| 74 | */ | ||
| 75 | public BuddhistCalendar(Locale aLocale) { | ||
| 76 | super(aLocale); | ||
| 77 | } | ||
| 78 | |||
| 79 | /** | ||
| 80 | * Constructs a BuddhistCalendar based on the current time | ||
| 81 | * in the given time zone with the given locale. | ||
| 82 | * @param zone the given time zone. | ||
| 83 | * @param aLocale the given locale. | ||
| 84 | */ | ||
| 85 | public BuddhistCalendar(TimeZone zone, Locale aLocale) { | ||
| 86 | super(zone, aLocale); | ||
| 87 | } | ||
| 88 | |||
| 89 | ///////////////// | ||
| 90 | // Public methods | ||
| 91 | ///////////////// | ||
| 92 | |||
| 93 | /** | ||
| 94 | * Compares this BuddhistCalendar to an object reference. | ||
| 95 | * @param obj the object reference with which to compare | ||
| 96 | * @return true if this object is equal to <code>obj</code>; false otherwise | ||
| 97 | */ | ||
| 98 | public boolean equals(Object obj) { | ||
| 99 | return obj instanceof BuddhistCalendar | ||
| 100 | && super.equals(obj); | ||
| 101 | } | ||
| 102 | |||
| 103 | /** | ||
| 104 | * Override hashCode. | ||
| 105 | * Generates the hash code for the BuddhistCalendar object | ||
| 106 | */ | ||
| 107 | public int hashCode() { | ||
| 108 | return super.hashCode() ^ BUDDHIST_YEAR_OFFSET; | ||
| 109 | } | ||
| 110 | |||
| 111 | /** | ||
| 112 | * Gets the value for a given time field. | ||
| 113 | * @param field the given time field. | ||
| 114 | * @return the value for the given time field. | ||
| 115 | */ | ||
| 116 | public int get(int field) | ||
| 117 | { | ||
| 118 | if (field == YEAR) { | ||
| 119 | return super.get(field) + yearOffset; | ||
| 120 | } | ||
| 121 | return super.get(field); | ||
| 122 | } | ||
| 123 | |||
| 124 | /** | ||
| 125 | * Sets the time field with the given value. | ||
| 126 | * @param field the given time field. | ||
| 127 | * @param value the value to be set for the given time field. | ||
| 128 | */ | ||
| 129 | public void set(int field, int value) | ||
| 130 | { | ||
| 131 | if (field == YEAR) { | ||
| 132 | super.set(field, value - yearOffset); | ||
| 133 | } else { | ||
| 134 | super.set(field, value); | ||
| 135 | } | ||
| 136 | } | ||
| 137 | |||
| 138 | /** | ||
| 139 | * Adds the specified (signed) amount of time to the given time field. | ||
| 140 | * @param field the time field. | ||
| 141 | * @param amount the amount of date or time to be added to the field. | ||
| 142 | */ | ||
| 143 | public void add(int field, int amount) | ||
| 144 | { | ||
| 145 | int savedYearOffset = yearOffset; | ||
| 146 | // To let the superclass calculate date-time values correctly, | ||
| 147 | // temporarily make this GregorianCalendar. | ||
| 148 | yearOffset = 0; | ||
| 149 | try { | ||
| 150 | super.add(field, amount); | ||
| 151 | } finally { | ||
| 152 | yearOffset = savedYearOffset; | ||
| 153 | } | ||
| 154 | } | ||
| 155 | |||
| 156 | /** | ||
| 157 | * Add to field a signed amount without changing larger fields. | ||
| 158 | * A negative roll amount means to subtract from field without changing | ||
| 159 | * larger fields. | ||
| 160 | * @param field the time field. | ||
| 161 | * @param amount the signed amount to add to <code>field</code>. | ||
| 162 | */ | ||
| 163 | public void roll(int field, int amount) | ||
| 164 | { | ||
| 165 | int savedYearOffset = yearOffset; | ||
| 166 | // To let the superclass calculate date-time values correctly, | ||
| 167 | // temporarily make this GregorianCalendar. | ||
| 168 | yearOffset = 0; | ||
| 169 | try { | ||
| 170 | super.roll(field, amount); | ||
| 171 | } finally { | ||
| 172 | yearOffset = savedYearOffset; | ||
| 173 | } | ||
| 174 | } | ||
| 175 | |||
| 176 | public String getDisplayName(int field, int style, Locale locale) { | ||
| 177 | if (field != ERA) { | ||
| 178 | return super.getDisplayName(field, style, locale); | ||
| 179 | } | ||
| 180 | |||
| 181 | // Handle Thai BuddhistCalendar specific era names | ||
| 182 | if (field < 0 || field >= fields.length || | ||
| 183 | style < SHORT || style > LONG) { | ||
| 184 | throw new IllegalArgumentException(); | ||
| 185 | } | ||
| 186 | if (locale == null) { | ||
| 187 | throw new NullPointerException(); | ||
| 188 | } | ||
| 189 | ResourceBundle rb = LocaleData.getDateFormatData(locale); | ||
| 190 | String[] eras = rb.getStringArray(getKey(style)); | ||
| 191 | return eras[get(field)]; | ||
| 192 | } | ||
| 193 | |||
| 194 | public Map<String,Integer> getDisplayNames(int field, int style, Locale locale) { | ||
| 195 | if (field != ERA) { | ||
| 196 | return super.getDisplayNames(field, style, locale); | ||
| 197 | } | ||
| 198 | |||
| 199 | // Handle Thai BuddhistCalendar specific era names | ||
| 200 | if (field < 0 || field >= fields.length || | ||
| 201 | style < ALL_STYLES || style > LONG) { | ||
| 202 | throw new IllegalArgumentException(); | ||
| 203 | } | ||
| 204 | if (locale == null) { | ||
| 205 | throw new NullPointerException(); | ||
| 206 | } | ||
| 207 | // ALL_STYLES | ||
| 208 | if (style == ALL_STYLES) { | ||
| 209 | Map<String,Integer> shortNames = getDisplayNamesImpl(field, SHORT, locale); | ||
| 210 | Map<String,Integer> longNames = getDisplayNamesImpl(field, LONG, locale); | ||
| 211 | if (shortNames == null) { | ||
| 212 | return longNames; | ||
| 213 | } | ||
| 214 | if (longNames != null) { | ||
| 215 | shortNames.putAll(longNames); | ||
| 216 | } | ||
| 217 | return shortNames; | ||
| 218 | } | ||
| 219 | |||
| 220 | // SHORT or LONG | ||
| 221 | return getDisplayNamesImpl(field, style, locale); | ||
| 222 | } | ||
| 223 | |||
| 224 | private Map<String,Integer> getDisplayNamesImpl(int field, int style, Locale locale) { | ||
| 225 | ResourceBundle rb = LocaleData.getDateFormatData(locale); | ||
| 226 | String[] eras = rb.getStringArray(getKey(style)); | ||
| 227 | Map<String,Integer> map = new HashMap<String,Integer>(4); | ||
| 228 | for (int i = 0; i < eras.length; i++) { | ||
| 229 | map.put(eras[i], i); | ||
| 230 | } | ||
| 231 | return map; | ||
| 232 | } | ||
| 233 | |||
| 234 | private String getKey(int style) { | ||
| 235 | StringBuilder key = new StringBuilder(); | ||
| 236 | key.append(BuddhistCalendar.class.getName()); | ||
| 237 | if (style == SHORT) { | ||
| 238 | key.append(".short"); | ||
| 239 | } | ||
| 240 | key.append(".Eras"); | ||
| 241 | return key.toString(); | ||
| 242 | } | ||
| 243 | |||
| 244 | /** | ||
| 245 | * Returns the maximum value that this field could have, given the | ||
| 246 | * current date. For example, with the date "Feb 3, 2540" and the | ||
| 247 | * <code>DAY_OF_MONTH</code> field, the actual maximum is 28; for | ||
| 248 | * "Feb 3, 2539" it is 29. | ||
| 249 | * | ||
| 250 | * @param field the field to determine the maximum of | ||
| 251 | * @return the maximum of the given field for the current date of this Calendar | ||
| 252 | */ | ||
| 253 | public int getActualMaximum(int field) { | ||
| 254 | int savedYearOffset = yearOffset; | ||
| 255 | // To let the superclass calculate date-time values correctly, | ||
| 256 | // temporarily make this GregorianCalendar. | ||
| 257 | yearOffset = 0; | ||
| 258 | try { | ||
| 259 | return super.getActualMaximum(field); | ||
| 260 | } finally { | ||
| 261 | yearOffset = savedYearOffset; | ||
| 262 | } | ||
| 263 | } | ||
| 264 | |||
| 265 | public String toString() { | ||
| 266 | // The super class produces a String with the Gregorian year | ||
| 267 | // value (or '?') | ||
| 268 | String s = super.toString(); | ||
| 269 | // If the YEAR field is UNSET, then return the Gregorian string. | ||
| 270 | if (!isSet(YEAR)) { | ||
| 271 | return s; | ||
| 272 | } | ||
| 273 | |||
| 274 | final String yearField = "YEAR="; | ||
| 275 | int p = s.indexOf(yearField); | ||
| 276 | // If the string doesn't include the year value for some | ||
| 277 | // reason, then return the Gregorian string. | ||
| 278 | if (p == -1) { | ||
| 279 | return s; | ||
| 280 | } | ||
| 281 | p += yearField.length(); | ||
| 282 | StringBuilder sb = new StringBuilder(s.substring(0, p)); | ||
| 283 | // Skip the year number | ||
| 284 | while (Character.isDigit(s.charAt(p++))) | ||
| 285 | ; | ||
| 286 | int year = internalGet(YEAR) + BUDDHIST_YEAR_OFFSET; | ||
| 287 | sb.append(year).append(s.substring(p - 1)); | ||
| 288 | return sb.toString(); | ||
| 289 | } | ||
| 290 | |||
| 291 | private transient int yearOffset = BUDDHIST_YEAR_OFFSET; | ||
| 292 | |||
| 293 | private void readObject(ObjectInputStream stream) | ||
| 294 | throws IOException, ClassNotFoundException { | ||
| 295 | stream.defaultReadObject(); | ||
| 296 | yearOffset = BUDDHIST_YEAR_OFFSET; | ||
| 297 | } | ||
| 298 | } | ||