1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/rt/emul/compact/src/main/java/java/text/CalendarBuilder.java Thu Oct 03 15:40:35 2013 +0200
1.3 @@ -0,0 +1,170 @@
1.4 +/*
1.5 + * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation. Oracle designates this
1.11 + * particular file as subject to the "Classpath" exception as provided
1.12 + * by Oracle in the LICENSE file that accompanied this code.
1.13 + *
1.14 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.15 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.16 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.17 + * version 2 for more details (a copy is included in the LICENSE file that
1.18 + * accompanied this code).
1.19 + *
1.20 + * You should have received a copy of the GNU General Public License version
1.21 + * 2 along with this work; if not, write to the Free Software Foundation,
1.22 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.23 + *
1.24 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.25 + * or visit www.oracle.com if you need additional information or have any
1.26 + * questions.
1.27 + */
1.28 +
1.29 +package java.text;
1.30 +
1.31 +import java.util.Calendar;
1.32 +import static java.util.GregorianCalendar.*;
1.33 +
1.34 +/**
1.35 + * {@code CalendarBuilder} keeps field-value pairs for setting
1.36 + * the calendar fields of the given {@code Calendar}. It has the
1.37 + * {@link Calendar#FIELD_COUNT FIELD_COUNT}-th field for the week year
1.38 + * support. Also {@code ISO_DAY_OF_WEEK} is used to specify
1.39 + * {@code DAY_OF_WEEK} in the ISO day of week numbering.
1.40 + *
1.41 + * <p>{@code CalendarBuilder} retains the semantic of the pseudo
1.42 + * timestamp for fields. {@code CalendarBuilder} uses a single
1.43 + * int array combining fields[] and stamp[] of {@code Calendar}.
1.44 + *
1.45 + * @author Masayoshi Okutsu
1.46 + */
1.47 +class CalendarBuilder {
1.48 + /*
1.49 + * Pseudo time stamp constants used in java.util.Calendar
1.50 + */
1.51 + private static final int UNSET = 0;
1.52 + private static final int COMPUTED = 1;
1.53 + private static final int MINIMUM_USER_STAMP = 2;
1.54 +
1.55 + private static final int MAX_FIELD = FIELD_COUNT + 1;
1.56 +
1.57 + public static final int WEEK_YEAR = FIELD_COUNT;
1.58 + public static final int ISO_DAY_OF_WEEK = 1000; // pseudo field index
1.59 +
1.60 + // stamp[] (lower half) and field[] (upper half) combined
1.61 + private final int[] field;
1.62 + private int nextStamp;
1.63 + private int maxFieldIndex;
1.64 +
1.65 + CalendarBuilder() {
1.66 + field = new int[MAX_FIELD * 2];
1.67 + nextStamp = MINIMUM_USER_STAMP;
1.68 + maxFieldIndex = -1;
1.69 + }
1.70 +
1.71 + CalendarBuilder set(int index, int value) {
1.72 + if (index == ISO_DAY_OF_WEEK) {
1.73 + index = DAY_OF_WEEK;
1.74 + value = toCalendarDayOfWeek(value);
1.75 + }
1.76 + field[index] = nextStamp++;
1.77 + field[MAX_FIELD + index] = value;
1.78 + if (index > maxFieldIndex && index < FIELD_COUNT) {
1.79 + maxFieldIndex = index;
1.80 + }
1.81 + return this;
1.82 + }
1.83 +
1.84 + CalendarBuilder addYear(int value) {
1.85 + field[MAX_FIELD + YEAR] += value;
1.86 + field[MAX_FIELD + WEEK_YEAR] += value;
1.87 + return this;
1.88 + }
1.89 +
1.90 + boolean isSet(int index) {
1.91 + if (index == ISO_DAY_OF_WEEK) {
1.92 + index = DAY_OF_WEEK;
1.93 + }
1.94 + return field[index] > UNSET;
1.95 + }
1.96 +
1.97 + Calendar establish(Calendar cal) {
1.98 + boolean weekDate = isSet(WEEK_YEAR)
1.99 + && field[WEEK_YEAR] > field[YEAR];
1.100 + if (weekDate && !cal.isWeekDateSupported()) {
1.101 + // Use YEAR instead
1.102 + if (!isSet(YEAR)) {
1.103 + set(YEAR, field[MAX_FIELD + WEEK_YEAR]);
1.104 + }
1.105 + weekDate = false;
1.106 + }
1.107 +
1.108 + cal.clear();
1.109 + // Set the fields from the min stamp to the max stamp so that
1.110 + // the field resolution works in the Calendar.
1.111 + for (int stamp = MINIMUM_USER_STAMP; stamp < nextStamp; stamp++) {
1.112 + for (int index = 0; index <= maxFieldIndex; index++) {
1.113 + if (field[index] == stamp) {
1.114 + cal.set(index, field[MAX_FIELD + index]);
1.115 + break;
1.116 + }
1.117 + }
1.118 + }
1.119 +
1.120 + if (weekDate) {
1.121 + int weekOfYear = isSet(WEEK_OF_YEAR) ? field[MAX_FIELD + WEEK_OF_YEAR] : 1;
1.122 + int dayOfWeek = isSet(DAY_OF_WEEK) ?
1.123 + field[MAX_FIELD + DAY_OF_WEEK] : cal.getFirstDayOfWeek();
1.124 + if (!isValidDayOfWeek(dayOfWeek) && cal.isLenient()) {
1.125 + if (dayOfWeek >= 8) {
1.126 + dayOfWeek--;
1.127 + weekOfYear += dayOfWeek / 7;
1.128 + dayOfWeek = (dayOfWeek % 7) + 1;
1.129 + } else {
1.130 + while (dayOfWeek <= 0) {
1.131 + dayOfWeek += 7;
1.132 + weekOfYear--;
1.133 + }
1.134 + }
1.135 + dayOfWeek = toCalendarDayOfWeek(dayOfWeek);
1.136 + }
1.137 + cal.setWeekDate(field[MAX_FIELD + WEEK_YEAR], weekOfYear, dayOfWeek);
1.138 + }
1.139 + return cal;
1.140 + }
1.141 +
1.142 + public String toString() {
1.143 + StringBuilder sb = new StringBuilder();
1.144 + sb.append("CalendarBuilder:[");
1.145 + for (int i = 0; i < field.length; i++) {
1.146 + if (isSet(i)) {
1.147 + sb.append(i).append('=').append(field[MAX_FIELD + i]).append(',');
1.148 + }
1.149 + }
1.150 + int lastIndex = sb.length() - 1;
1.151 + if (sb.charAt(lastIndex) == ',') {
1.152 + sb.setLength(lastIndex);
1.153 + }
1.154 + sb.append(']');
1.155 + return sb.toString();
1.156 + }
1.157 +
1.158 + static int toISODayOfWeek(int calendarDayOfWeek) {
1.159 + return calendarDayOfWeek == SUNDAY ? 7 : calendarDayOfWeek - 1;
1.160 + }
1.161 +
1.162 + static int toCalendarDayOfWeek(int isoDayOfWeek) {
1.163 + if (!isValidDayOfWeek(isoDayOfWeek)) {
1.164 + // adjust later for lenient mode
1.165 + return isoDayOfWeek;
1.166 + }
1.167 + return isoDayOfWeek == 7 ? SUNDAY : isoDayOfWeek + 1;
1.168 + }
1.169 +
1.170 + static boolean isValidDayOfWeek(int dayOfWeek) {
1.171 + return dayOfWeek > 0 && dayOfWeek <= 7;
1.172 + }
1.173 +}