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| 1 | /* | ||
| 2 | * Copyright (c) 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 java.text; | ||
| 27 | |||
| 28 | import java.util.Calendar; | ||
| 29 | import static java.util.GregorianCalendar.*; | ||
| 30 | |||
| 31 | /** | ||
| 32 | * {@code CalendarBuilder} keeps field-value pairs for setting | ||
| 33 | * the calendar fields of the given {@code Calendar}. It has the | ||
| 34 | * {@link Calendar#FIELD_COUNT FIELD_COUNT}-th field for the week year | ||
| 35 | * support. Also {@code ISO_DAY_OF_WEEK} is used to specify | ||
| 36 | * {@code DAY_OF_WEEK} in the ISO day of week numbering. | ||
| 37 | * | ||
| 38 | * <p>{@code CalendarBuilder} retains the semantic of the pseudo | ||
| 39 | * timestamp for fields. {@code CalendarBuilder} uses a single | ||
| 40 | * int array combining fields[] and stamp[] of {@code Calendar}. | ||
| 41 | * | ||
| 42 | * @author Masayoshi Okutsu | ||
| 43 | */ | ||
| 44 | class CalendarBuilder { | ||
| 45 | /* | ||
| 46 | * Pseudo time stamp constants used in java.util.Calendar | ||
| 47 | */ | ||
| 48 | private static final int UNSET = 0; | ||
| 49 | private static final int COMPUTED = 1; | ||
| 50 | private static final int MINIMUM_USER_STAMP = 2; | ||
| 51 | |||
| 52 | private static final int MAX_FIELD = FIELD_COUNT + 1; | ||
| 53 | |||
| 54 | public static final int WEEK_YEAR = FIELD_COUNT; | ||
| 55 | public static final int ISO_DAY_OF_WEEK = 1000; // pseudo field index | ||
| 56 | |||
| 57 | // stamp[] (lower half) and field[] (upper half) combined | ||
| 58 | private final int[] field; | ||
| 59 | private int nextStamp; | ||
| 60 | private int maxFieldIndex; | ||
| 61 | |||
| 62 | CalendarBuilder() { | ||
| 63 | field = new int[MAX_FIELD * 2]; | ||
| 64 | nextStamp = MINIMUM_USER_STAMP; | ||
| 65 | maxFieldIndex = -1; | ||
| 66 | } | ||
| 67 | |||
| 68 | CalendarBuilder set(int index, int value) { | ||
| 69 | if (index == ISO_DAY_OF_WEEK) { | ||
| 70 | index = DAY_OF_WEEK; | ||
| 71 | value = toCalendarDayOfWeek(value); | ||
| 72 | } | ||
| 73 | field[index] = nextStamp++; | ||
| 74 | field[MAX_FIELD + index] = value; | ||
| 75 | if (index > maxFieldIndex && index < FIELD_COUNT) { | ||
| 76 | maxFieldIndex = index; | ||
| 77 | } | ||
| 78 | return this; | ||
| 79 | } | ||
| 80 | |||
| 81 | CalendarBuilder addYear(int value) { | ||
| 82 | field[MAX_FIELD + YEAR] += value; | ||
| 83 | field[MAX_FIELD + WEEK_YEAR] += value; | ||
| 84 | return this; | ||
| 85 | } | ||
| 86 | |||
| 87 | boolean isSet(int index) { | ||
| 88 | if (index == ISO_DAY_OF_WEEK) { | ||
| 89 | index = DAY_OF_WEEK; | ||
| 90 | } | ||
| 91 | return field[index] > UNSET; | ||
| 92 | } | ||
| 93 | |||
| 94 | Calendar establish(Calendar cal) { | ||
| 95 | boolean weekDate = isSet(WEEK_YEAR) | ||
| 96 | && field[WEEK_YEAR] > field[YEAR]; | ||
| 97 | if (weekDate && !cal.isWeekDateSupported()) { | ||
| 98 | // Use YEAR instead | ||
| 99 | if (!isSet(YEAR)) { | ||
| 100 | set(YEAR, field[MAX_FIELD + WEEK_YEAR]); | ||
| 101 | } | ||
| 102 | weekDate = false; | ||
| 103 | } | ||
| 104 | |||
| 105 | cal.clear(); | ||
| 106 | // Set the fields from the min stamp to the max stamp so that | ||
| 107 | // the field resolution works in the Calendar. | ||
| 108 | for (int stamp = MINIMUM_USER_STAMP; stamp < nextStamp; stamp++) { | ||
| 109 | for (int index = 0; index <= maxFieldIndex; index++) { | ||
| 110 | if (field[index] == stamp) { | ||
| 111 | cal.set(index, field[MAX_FIELD + index]); | ||
| 112 | break; | ||
| 113 | } | ||
| 114 | } | ||
| 115 | } | ||
| 116 | |||
| 117 | if (weekDate) { | ||
| 118 | int weekOfYear = isSet(WEEK_OF_YEAR) ? field[MAX_FIELD + WEEK_OF_YEAR] : 1; | ||
| 119 | int dayOfWeek = isSet(DAY_OF_WEEK) ? | ||
| 120 | field[MAX_FIELD + DAY_OF_WEEK] : cal.getFirstDayOfWeek(); | ||
| 121 | if (!isValidDayOfWeek(dayOfWeek) && cal.isLenient()) { | ||
| 122 | if (dayOfWeek >= 8) { | ||
| 123 | dayOfWeek--; | ||
| 124 | weekOfYear += dayOfWeek / 7; | ||
| 125 | dayOfWeek = (dayOfWeek % 7) + 1; | ||
| 126 | } else { | ||
| 127 | while (dayOfWeek <= 0) { | ||
| 128 | dayOfWeek += 7; | ||
| 129 | weekOfYear--; | ||
| 130 | } | ||
| 131 | } | ||
| 132 | dayOfWeek = toCalendarDayOfWeek(dayOfWeek); | ||
| 133 | } | ||
| 134 | cal.setWeekDate(field[MAX_FIELD + WEEK_YEAR], weekOfYear, dayOfWeek); | ||
| 135 | } | ||
| 136 | return cal; | ||
| 137 | } | ||
| 138 | |||
| 139 | public String toString() { | ||
| 140 | StringBuilder sb = new StringBuilder(); | ||
| 141 | sb.append("CalendarBuilder:["); | ||
| 142 | for (int i = 0; i < field.length; i++) { | ||
| 143 | if (isSet(i)) { | ||
| 144 | sb.append(i).append('=').append(field[MAX_FIELD + i]).append(','); | ||
| 145 | } | ||
| 146 | } | ||
| 147 | int lastIndex = sb.length() - 1; | ||
| 148 | if (sb.charAt(lastIndex) == ',') { | ||
| 149 | sb.setLength(lastIndex); | ||
| 150 | } | ||
| 151 | sb.append(']'); | ||
| 152 | return sb.toString(); | ||
| 153 | } | ||
| 154 | |||
| 155 | static int toISODayOfWeek(int calendarDayOfWeek) { | ||
| 156 | return calendarDayOfWeek == SUNDAY ? 7 : calendarDayOfWeek - 1; | ||
| 157 | } | ||
| 158 | |||
| 159 | static int toCalendarDayOfWeek(int isoDayOfWeek) { | ||
| 160 | if (!isValidDayOfWeek(isoDayOfWeek)) { | ||
| 161 | // adjust later for lenient mode | ||
| 162 | return isoDayOfWeek; | ||
| 163 | } | ||
| 164 | return isoDayOfWeek == 7 ? SUNDAY : isoDayOfWeek + 1; | ||
| 165 | } | ||
| 166 | |||
| 167 | static boolean isValidDayOfWeek(int dayOfWeek) { | ||
| 168 | return dayOfWeek > 0 && dayOfWeek <= 7; | ||
| 169 | } | ||
| 170 | } | ||