--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/java/text/CalendarBuilder.java Wed Sep 01 15:19:13 2010 +0900
@@ -0,0 +1,170 @@
+/*
+ * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package java.text;
+
+import java.util.Calendar;
+import static java.util.GregorianCalendar.*;
+
+/**
+ * {@code CalendarBuilder} keeps field-value pairs for setting
+ * the calendar fields of the given {@code Calendar}. It has the
+ * {@link Calendar#FIELD_COUNT FIELD_COUNT}-th field for the week year
+ * support. Also {@code ISO_DAY_OF_WEEK} is used to specify
+ * {@code DAY_OF_WEEK} in the ISO day of week numbering.
+ *
+ * <p>{@code CalendarBuilder} retains the semantic of the pseudo
+ * timestamp for fields. {@code CalendarBuilder} uses a single
+ * int array combining fields[] and stamp[] of {@code Calendar}.
+ *
+ * @author Masayoshi Okutsu
+ */
+class CalendarBuilder {
+ /*
+ * Pseudo time stamp constants used in java.util.Calendar
+ */
+ private static final int UNSET = 0;
+ private static final int COMPUTED = 1;
+ private static final int MINIMUM_USER_STAMP = 2;
+
+ private static final int MAX_FIELD = FIELD_COUNT + 1;
+
+ public static final int WEEK_YEAR = FIELD_COUNT;
+ public static final int ISO_DAY_OF_WEEK = 1000; // pseudo field index
+
+ // stamp[] (lower half) and field[] (upper half) combined
+ private final int[] field;
+ private int nextStamp;
+ private int maxFieldIndex;
+
+ CalendarBuilder() {
+ field = new int[MAX_FIELD * 2];
+ nextStamp = MINIMUM_USER_STAMP;
+ maxFieldIndex = -1;
+ }
+
+ CalendarBuilder set(int index, int value) {
+ if (index == ISO_DAY_OF_WEEK) {
+ index = DAY_OF_WEEK;
+ value = toCalendarDayOfWeek(value);
+ }
+ field[index] = nextStamp++;
+ field[MAX_FIELD + index] = value;
+ if (index > maxFieldIndex && index < FIELD_COUNT) {
+ maxFieldIndex = index;
+ }
+ return this;
+ }
+
+ CalendarBuilder addYear(int value) {
+ field[MAX_FIELD + YEAR] += value;
+ field[MAX_FIELD + WEEK_YEAR] += value;
+ return this;
+ }
+
+ boolean isSet(int index) {
+ if (index == ISO_DAY_OF_WEEK) {
+ index = DAY_OF_WEEK;
+ }
+ return field[index] > UNSET;
+ }
+
+ Calendar establish(Calendar cal) {
+ boolean weekDate = isSet(WEEK_YEAR)
+ && field[WEEK_YEAR] > field[YEAR];
+ if (weekDate && !cal.isWeekDateSupported()) {
+ // Use YEAR instead
+ if (!isSet(YEAR)) {
+ set(YEAR, field[MAX_FIELD + WEEK_YEAR]);
+ }
+ weekDate = false;
+ }
+
+ cal.clear();
+ // Set the fields from the min stamp to the max stamp so that
+ // the field resolution works in the Calendar.
+ for (int stamp = MINIMUM_USER_STAMP; stamp < nextStamp; stamp++) {
+ for (int index = 0; index <= maxFieldIndex; index++) {
+ if (field[index] == stamp) {
+ cal.set(index, field[MAX_FIELD + index]);
+ break;
+ }
+ }
+ }
+
+ if (weekDate) {
+ int weekOfYear = isSet(WEEK_OF_YEAR) ? field[MAX_FIELD + WEEK_OF_YEAR] : 1;
+ int dayOfWeek = isSet(DAY_OF_WEEK) ?
+ field[MAX_FIELD + DAY_OF_WEEK] : cal.getFirstDayOfWeek();
+ if (!isValidDayOfWeek(dayOfWeek) && cal.isLenient()) {
+ if (dayOfWeek >= 8) {
+ dayOfWeek--;
+ weekOfYear += dayOfWeek / 7;
+ dayOfWeek = (dayOfWeek % 7) + 1;
+ } else {
+ while (dayOfWeek <= 0) {
+ dayOfWeek += 7;
+ weekOfYear--;
+ }
+ }
+ dayOfWeek = toCalendarDayOfWeek(dayOfWeek);
+ }
+ cal.setWeekDate(field[MAX_FIELD + WEEK_YEAR], weekOfYear, dayOfWeek);
+ }
+ return cal;
+ }
+
+ public String toString() {
+ StringBuilder sb = new StringBuilder();
+ sb.append("CalendarBuilder:[");
+ for (int i = 0; i < field.length; i++) {
+ if (isSet(i)) {
+ sb.append(i).append('=').append(field[MAX_FIELD + i]).append(',');
+ }
+ }
+ int lastIndex = sb.length() - 1;
+ if (sb.charAt(lastIndex) == ',') {
+ sb.setLength(lastIndex);
+ }
+ sb.append(']');
+ return sb.toString();
+ }
+
+ static int toISODayOfWeek(int calendarDayOfWeek) {
+ return calendarDayOfWeek == SUNDAY ? 7 : calendarDayOfWeek - 1;
+ }
+
+ static int toCalendarDayOfWeek(int isoDayOfWeek) {
+ if (!isValidDayOfWeek(isoDayOfWeek)) {
+ // adjust later for lenient mode
+ return isoDayOfWeek;
+ }
+ return isoDayOfWeek == 7 ? SUNDAY : isoDayOfWeek + 1;
+ }
+
+ static boolean isValidDayOfWeek(int dayOfWeek) {
+ return dayOfWeek > 0 && dayOfWeek <= 7;
+ }
+}