1 /*
2 * Copyright (c) 2000, 2004, 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 build.tools.javazic;
27
28 import java.util.ArrayList;
29 import java.util.HashMap;
30 import java.util.List;
31 import java.util.Map;
32
33 /**
34 * RuleDay class represents the value of the "ON" field. The day of
35 * week values start from 1 following the {@link java.util.Calendar}
36 * convention.
37 *
38 * @since 1.4
39 */
40 class RuleDay {
41 private static final Map<String,DayOfWeek> abbreviations = new HashMap<String,DayOfWeek>(7);
42 static {
43 for (DayOfWeek day : DayOfWeek.values()) {
44 abbreviations.put(day.getAbbr(), day);
45 }
46 }
47
48 private String dayName = null;
49 private DayOfWeek dow;
50 private boolean lastOne = false;
51 private int soonerOrLater = 0;
52 private int thanDayOfMonth; // day of month (e.g., 8 for "Sun>=8")
53
54 RuleDay() {
55 }
56
57 RuleDay(int day) {
58 thanDayOfMonth = day;
59 }
60
61 int getDay() {
62 return thanDayOfMonth;
63 }
64
65 /**
66 * @return the day of week value (1-based)
67 */
68 int getDayOfWeekNum() {
69 return dow.value();
70 }
71
72 /**
73 * @return true if this rule day represents the last day of
74 * week. (e.g., lastSun).
75 */
76 boolean isLast() {
77 return lastOne;
78 }
79
80 /**
81 * @return true if this rule day represents the day of week on or
82 * later than (after) the {@link #getDay}. (e.g., Sun>=1)
83 */
84 boolean isLater() {
85 return soonerOrLater > 0;
86 }
87
88 /**
89 * @return true if this rule day represents the day of week on or
90 * earlier than (before) the {@link #getDay}. (e.g., Sun<=15)
91 */
92 boolean isEarlier() {
93 return soonerOrLater < 0;
94 }
95
96 /**
97 * @return true if this rule day represents an exact day.
98 */
99 boolean isExact() {
100 return soonerOrLater == 0;
101 }
102
103 /**
104 * Parses the "ON" field and constructs a RuleDay.
105 * @param day an "ON" field string (e.g., "Sun>=1")
106 * @return a RuleDay representing the given "ON" field
107 */
108 static RuleDay parse(String day) {
109 RuleDay d = new RuleDay();
110 if (day.startsWith("last")) {
111 d.lastOne = true;
112 d.dayName = day.substring(4);
113 d.dow = getDOW(d.dayName);
114 } else {
115 int index;
116 if ((index = day.indexOf(">=")) != -1) {
117 d.dayName = day.substring(0, index);
118 d.dow = getDOW(d.dayName);
119 d.soonerOrLater = 1; // greater or equal
120 d.thanDayOfMonth = Integer.parseInt(day.substring(index+2));
121 } else if ((index = day.indexOf("<=")) != -1) {
122 d.dayName = day.substring(0, index);
123 d.dow = getDOW(d.dayName);
124 d.soonerOrLater = -1; // less or equal
125 d.thanDayOfMonth = Integer.parseInt(day.substring(index+2));
126 } else {
127 // it should be an integer value.
128 d.thanDayOfMonth = Integer.parseInt(day);
129 }
130 }
131 return d;
132 }
133
134 /**
135 * Converts this RuleDay to the SimpleTimeZone day rule.
136 * @return the converted SimpleTimeZone day rule
137 */
138 int getDayForSimpleTimeZone() {
139 if (isLast()) {
140 return -1;
141 }
142 return isEarlier() ? -getDay() : getDay();
143 }
144
145 /**
146 * Converts this RuleDay to the SimpleTimeZone day-of-week rule.
147 * @return the SimpleTimeZone day-of-week rule value
148 */
149 int getDayOfWeekForSimpleTimeZoneInt() {
150 if (isEarlier() || isLater()) {
151 return -getDayOfWeekNum();
152 }
153 return isLast() ? getDayOfWeekNum() : 0;
154 }
155
156 /**
157 * @return the string representation of the {@link
158 * #getDayOfWeekForSimpleTimeZoneInt} value
159 */
160 String getDayOfWeekForSimpleTimeZone() {
161 int d = getDayOfWeekForSimpleTimeZoneInt();
162 if (d == 0) {
163 return "0";
164 }
165 String sign = "";
166 if (d < 0) {
167 sign = "-";
168 d = -d;
169 }
170 return sign + toString(d);
171 }
172
173 private static DayOfWeek getDOW(String abbr) {
174 return abbreviations.get(abbr);
175 }
176
177 /**
178 * Converts the specified day of week value to the day-of-week
179 * name defined in {@link java.util.Calenda}.
180 * @param dow 1-based day of week value
181 * @return the Calendar day of week name with "Calendar." prefix.
182 * @throws IllegalArgumentException if the specified dow value is out of range.
183 */
184 static String toString(int dow) {
185 if (dow >= DayOfWeek.SUNDAY.value() && dow <= DayOfWeek.SATURDAY.value()) {
186 return "Calendar." + DayOfWeek.values()[dow - 1];
187 }
188 throw new IllegalArgumentException("wrong Day_of_Week number: " + dow);
189 }
190 }