J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2000-2005 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package sun.util; |
| 27 | |
| 28 | import java.util.Calendar; |
| 29 | import java.util.GregorianCalendar; |
| 30 | import java.util.HashMap; |
| 31 | import java.util.Locale; |
| 32 | import java.util.Map; |
| 33 | import java.util.ResourceBundle; |
| 34 | import java.util.TimeZone; |
| 35 | import sun.util.resources.LocaleData; |
| 36 | |
| 37 | public class BuddhistCalendar extends GregorianCalendar { |
| 38 | |
| 39 | ////////////////// |
| 40 | // Class Variables |
| 41 | ////////////////// |
| 42 | |
| 43 | private static final long serialVersionUID = -8527488697350388578L; |
| 44 | |
| 45 | private static final int buddhistOffset = 543; |
| 46 | |
| 47 | /////////////// |
| 48 | // Constructors |
| 49 | /////////////// |
| 50 | |
| 51 | /** |
| 52 | * Constructs a default BuddhistCalendar using the current time |
| 53 | * in the default time zone with the default locale. |
| 54 | */ |
| 55 | public BuddhistCalendar() { |
| 56 | super(); |
| 57 | } |
| 58 | |
| 59 | /** |
| 60 | * Constructs a BuddhistCalendar based on the current time |
| 61 | * in the given time zone with the default locale. |
| 62 | * @param zone the given time zone. |
| 63 | */ |
| 64 | public BuddhistCalendar(TimeZone zone) { |
| 65 | super(zone); |
| 66 | } |
| 67 | |
| 68 | /** |
| 69 | * Constructs a BuddhistCalendar based on the current time |
| 70 | * in the default time zone with the given locale. |
| 71 | * @param aLocale the given locale. |
| 72 | */ |
| 73 | public BuddhistCalendar(Locale aLocale) { |
| 74 | super(aLocale); |
| 75 | } |
| 76 | |
| 77 | /** |
| 78 | * Constructs a BuddhistCalendar based on the current time |
| 79 | * in the given time zone with the given locale. |
| 80 | * @param zone the given time zone. |
| 81 | * @param aLocale the given locale. |
| 82 | */ |
| 83 | public BuddhistCalendar(TimeZone zone, Locale aLocale) { |
| 84 | super(zone, aLocale); |
| 85 | } |
| 86 | |
| 87 | ///////////////// |
| 88 | // Public methods |
| 89 | ///////////////// |
| 90 | |
| 91 | /** |
| 92 | * Compares this BuddhistCalendar to an object reference. |
| 93 | * @param obj the object reference with which to compare |
| 94 | * @return true if this object is equal to <code>obj</code>; false otherwise |
| 95 | */ |
| 96 | public boolean equals(Object obj) { |
| 97 | return obj instanceof BuddhistCalendar |
| 98 | && super.equals(obj); |
| 99 | } |
| 100 | |
| 101 | /** |
| 102 | * Override hashCode. |
| 103 | * Generates the hash code for the BuddhistCalendar object |
| 104 | */ |
| 105 | public int hashCode() { |
| 106 | return super.hashCode() ^ buddhistOffset; |
| 107 | } |
| 108 | |
| 109 | /** |
| 110 | * Gets the value for a given time field. |
| 111 | * @param field the given time field. |
| 112 | * @return the value for the given time field. |
| 113 | */ |
| 114 | public int get(int field) |
| 115 | { |
| 116 | if (field == YEAR) { |
| 117 | return super.get(field) + yearOffset; |
| 118 | } |
| 119 | return super.get(field); |
| 120 | } |
| 121 | |
| 122 | /** |
| 123 | * Sets the time field with the given value. |
| 124 | * @param field the given time field. |
| 125 | * @param value the value to be set for the given time field. |
| 126 | */ |
| 127 | public void set(int field, int value) |
| 128 | { |
| 129 | if (field == YEAR) { |
| 130 | super.set(field, value - yearOffset); |
| 131 | } else { |
| 132 | super.set(field, value); |
| 133 | } |
| 134 | } |
| 135 | |
| 136 | /** |
| 137 | * Adds the specified (signed) amount of time to the given time field. |
| 138 | * @param field the time field. |
| 139 | * @param amount the amount of date or time to be added to the field. |
| 140 | */ |
| 141 | public void add(int field, int amount) |
| 142 | { |
| 143 | int savedYearOffset = yearOffset; |
| 144 | yearOffset = 0; |
| 145 | try { |
| 146 | super.add(field, amount); |
| 147 | } finally { |
| 148 | yearOffset = savedYearOffset; |
| 149 | } |
| 150 | } |
| 151 | |
| 152 | /** |
| 153 | * Add to field a signed amount without changing larger fields. |
| 154 | * A negative roll amount means to subtract from field without changing |
| 155 | * larger fields. |
| 156 | * @param field the time field. |
| 157 | * @param amount the signed amount to add to <code>field</code>. |
| 158 | */ |
| 159 | public void roll(int field, int amount) |
| 160 | { |
| 161 | int savedYearOffset = yearOffset; |
| 162 | yearOffset = 0; |
| 163 | try { |
| 164 | super.roll(field, amount); |
| 165 | } finally { |
| 166 | yearOffset = savedYearOffset; |
| 167 | } |
| 168 | } |
| 169 | |
| 170 | public String getDisplayName(int field, int style, Locale locale) { |
| 171 | if (field != ERA) { |
| 172 | return super.getDisplayName(field, style, locale); |
| 173 | } |
| 174 | |
| 175 | // Handle Thai BuddhistCalendar specific era names |
| 176 | if (field < 0 || field >= fields.length || |
| 177 | style < SHORT || style > LONG) { |
| 178 | throw new IllegalArgumentException(); |
| 179 | } |
| 180 | if (locale == null) { |
| 181 | throw new NullPointerException(); |
| 182 | } |
| 183 | ResourceBundle rb = LocaleData.getDateFormatData(locale); |
| 184 | String[] eras = rb.getStringArray(getKey(style)); |
| 185 | return eras[get(field)]; |
| 186 | } |
| 187 | |
| 188 | public Map<String,Integer> getDisplayNames(int field, int style, Locale locale) { |
| 189 | if (field != ERA) { |
| 190 | return super.getDisplayNames(field, style, locale); |
| 191 | } |
| 192 | |
| 193 | // Handle Thai BuddhistCalendar specific era names |
| 194 | if (field < 0 || field >= fields.length || |
| 195 | style < ALL_STYLES || style > LONG) { |
| 196 | throw new IllegalArgumentException(); |
| 197 | } |
| 198 | if (locale == null) { |
| 199 | throw new NullPointerException(); |
| 200 | } |
| 201 | // ALL_STYLES |
| 202 | if (style == ALL_STYLES) { |
| 203 | Map<String,Integer> shortNames = getDisplayNamesImpl(field, SHORT, locale); |
| 204 | Map<String,Integer> longNames = getDisplayNamesImpl(field, LONG, locale); |
| 205 | if (shortNames == null) { |
| 206 | return longNames; |
| 207 | } |
| 208 | if (longNames != null) { |
| 209 | shortNames.putAll(longNames); |
| 210 | } |
| 211 | return shortNames; |
| 212 | } |
| 213 | |
| 214 | // SHORT or LONG |
| 215 | return getDisplayNamesImpl(field, style, locale); |
| 216 | } |
| 217 | |
| 218 | private Map<String,Integer> getDisplayNamesImpl(int field, int style, Locale locale) { |
| 219 | ResourceBundle rb = LocaleData.getDateFormatData(locale); |
| 220 | String[] eras = rb.getStringArray(getKey(style)); |
| 221 | Map<String,Integer> map = new HashMap<String,Integer>(4); |
| 222 | for (int i = 0; i < eras.length; i++) { |
| 223 | map.put(eras[i], i); |
| 224 | } |
| 225 | return map; |
| 226 | } |
| 227 | |
| 228 | private String getKey(int style) { |
| 229 | StringBuilder key = new StringBuilder(); |
| 230 | key.append(BuddhistCalendar.class.getName()); |
| 231 | if (style == SHORT) { |
| 232 | key.append(".short"); |
| 233 | } |
| 234 | key.append(".Eras"); |
| 235 | return key.toString(); |
| 236 | } |
| 237 | |
| 238 | /** |
| 239 | * Returns the maximum value that this field could have, given the |
| 240 | * current date. For example, with the date "Feb 3, 2540" and the |
| 241 | * <code>DAY_OF_MONTH</code> field, the actual maximum is 28; for |
| 242 | * "Feb 3, 2539" it is 29. |
| 243 | * |
| 244 | * @param field the field to determine the maximum of |
| 245 | * @return the maximum of the given field for the current date of this Calendar |
| 246 | */ |
| 247 | public int getActualMaximum(int field) { |
| 248 | int savedYearOffset = yearOffset; |
| 249 | yearOffset = 0; |
| 250 | try { |
| 251 | return super.getActualMaximum(field); |
| 252 | } finally { |
| 253 | yearOffset = savedYearOffset; |
| 254 | } |
| 255 | } |
| 256 | |
| 257 | public String toString() { |
| 258 | // The super class produces a String with the Gregorian year |
| 259 | // value (or '?') |
| 260 | String s = super.toString(); |
| 261 | // If the YEAR field is UNSET, then return the Gregorian string. |
| 262 | if (!isSet(YEAR)) { |
| 263 | return s; |
| 264 | } |
| 265 | |
| 266 | final String yearField = "YEAR="; |
| 267 | int p = s.indexOf(yearField); |
| 268 | // If the string doesn't include the year value for some |
| 269 | // reason, then return the Gregorian string. |
| 270 | if (p == -1) { |
| 271 | return s; |
| 272 | } |
| 273 | p += yearField.length(); |
| 274 | StringBuilder sb = new StringBuilder(s.substring(0, p)); |
| 275 | // Skip the year number |
| 276 | while (Character.isDigit(s.charAt(p++))) |
| 277 | ; |
| 278 | int year = internalGet(YEAR) + buddhistOffset; |
| 279 | sb.append(year).append(s.substring(p - 1)); |
| 280 | return sb.toString(); |
| 281 | } |
| 282 | |
| 283 | private transient int yearOffset = buddhistOffset; |
| 284 | |
| 285 | } |