1 /*
2 * Copyright (c) 2012, 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.locale.provider;
27
28 import java.util.Calendar;
29 import static java.util.Calendar.*;
30 import java.util.Locale;
31 import java.util.Map;
32 import java.util.spi.CalendarDataProvider;
33 import java.util.spi.CalendarNameProvider;
34
35 /**
36 * {@code CalendarDataUtility} is a utility class for calling the
37 * {@link CalendarDataProvider} methods.
38 *
39 * @author Masayoshi Okutsu
40 * @author Naoto Sato
41 */
42 public class CalendarDataUtility {
43 public final static String FIRST_DAY_OF_WEEK = "firstDayOfWeek";
44 public final static String MINIMAL_DAYS_IN_FIRST_WEEK = "minimalDaysInFirstWeek";
45
46 // No instantiation
47 private CalendarDataUtility() {
48 }
49
50 public static int retrieveFirstDayOfWeek(Locale locale) {
51 LocaleServiceProviderPool pool =
52 LocaleServiceProviderPool.getPool(CalendarDataProvider.class);
53 Integer value = pool.getLocalizedObject(CalendarWeekParameterGetter.INSTANCE,
54 locale, FIRST_DAY_OF_WEEK);
55 return (value != null && (value >= SUNDAY && value <= SATURDAY)) ? value : SUNDAY;
56 }
57
58 public static int retrieveMinimalDaysInFirstWeek(Locale locale) {
59 LocaleServiceProviderPool pool =
60 LocaleServiceProviderPool.getPool(CalendarDataProvider.class);
61 Integer value = pool.getLocalizedObject(CalendarWeekParameterGetter.INSTANCE,
62 locale, MINIMAL_DAYS_IN_FIRST_WEEK);
63 return (value != null && (value >= 1 && value <= 7)) ? value : 1;
64 }
65
66 public static String retrieveFieldValueName(String id, int field, int value, int style, Locale locale) {
67 LocaleServiceProviderPool pool =
68 LocaleServiceProviderPool.getPool(CalendarNameProvider.class);
69 return pool.getLocalizedObject(CalendarFieldValueNameGetter.INSTANCE, locale, id,
70 field, value, style);
71 }
72
73 public static Map<String, Integer> retrieveFieldValueNames(String id, int field, int style, Locale locale) {
74 LocaleServiceProviderPool pool =
75 LocaleServiceProviderPool.getPool(CalendarNameProvider.class);
76 return pool.getLocalizedObject(CalendarFieldValueNamesMapGetter.INSTANCE, locale, id, field, style);
77 }
78
79 /**
80 * Obtains a localized field value string from a CalendarDataProvider
81 * implementation.
82 */
83 private static class CalendarFieldValueNameGetter
84 implements LocaleServiceProviderPool.LocalizedObjectGetter<CalendarNameProvider,
85 String> {
86 private static final CalendarFieldValueNameGetter INSTANCE =
87 new CalendarFieldValueNameGetter();
88
89 @Override
90 public String getObject(CalendarNameProvider calendarNameProvider,
91 Locale locale,
92 String requestID, // calendarType
93 Object... params) {
94 assert params.length == 3;
95 int field = (int) params[0];
96 int value = (int) params[1];
97 int style = (int) params[2];
98 return calendarNameProvider.getDisplayName(requestID, field, value, style, locale);
99 }
100 }
101
102 /**
103 * Obtains a localized field-value pairs from a CalendarDataProvider
104 * implementation.
105 */
106 private static class CalendarFieldValueNamesMapGetter
107 implements LocaleServiceProviderPool.LocalizedObjectGetter<CalendarNameProvider,
108 Map<String, Integer>> {
109 private static final CalendarFieldValueNamesMapGetter INSTANCE =
110 new CalendarFieldValueNamesMapGetter();
111
112 @Override
113 public Map<String, Integer> getObject(CalendarNameProvider calendarNameProvider,
114 Locale locale,
115 String requestID, // calendarType
116 Object... params) {
117 assert params.length == 2;
118 int field = (int) params[0];
119 int style = (int) params[1];
120 return calendarNameProvider.getDisplayNames(requestID, field, style, locale);
121 }
122 }
123
124 private static class CalendarWeekParameterGetter
125 implements LocaleServiceProviderPool.LocalizedObjectGetter<CalendarDataProvider,
126 Integer> {
127 private static final CalendarWeekParameterGetter INSTANCE =
128 new CalendarWeekParameterGetter();
129
130 @Override
131 public Integer getObject(CalendarDataProvider calendarDataProvider,
132 Locale locale,
133 String requestID, // resource key
134 Object... params) {
135 assert params.length == 0;
136 int value;
137 switch (requestID) {
138 case FIRST_DAY_OF_WEEK:
139 value = calendarDataProvider.getFirstDayOfWeek(locale);
140 break;
141 case MINIMAL_DAYS_IN_FIRST_WEEK:
142 value = calendarDataProvider.getMinimalDaysInFirstWeek(locale);
143 break;
144 default:
145 throw new InternalError("invalid requestID: " + requestID);
146 }
147 return (value != 0) ? value : null;
148 }
149 }
150 }