Caldavsync Sources / file comparison

comparison: src/net/fortuna/ical4j/model/Iso8601.java

src/net/fortuna/ical4j/model/Iso8601.java

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1 /**
2 * Copyright (c) 2012, Ben Fortuna
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * o Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
12 * o Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * o Neither the name of Ben Fortuna nor the names of any other contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
24 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
26 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
27 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
28 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
29 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
30 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32 package net.fortuna.ical4j.model;
33
34 import java.text.DateFormat;
35 import java.util.Date;
36
37 import net.fortuna.ical4j.util.CompatibilityHints;
38 import net.fortuna.ical4j.util.Dates;
39 import net.fortuna.ical4j.util.TimeZones;
40
41 /**
42 * $Id$
43 *
44 * Created on 30/06/2005
45 *
46 * Base class for date and time representations as defined
47 * by the ISO 8601 standard. Sub-classes must ensure that either the correct
48 * precision is used in constructor arguments, or that <code>Object.equals()</code>
49 * is overridden to ensure equality checking is consistent with the type.
50 * @author Ben Fortuna
51 */
52 public abstract class Iso8601 extends Date {
53
54 /**
55 *
56 */
57 private static final long serialVersionUID = -4290728005713946811L;
58
59 private DateFormat format;
60
61 private DateFormat gmtFormat;
62
63 private int precision;
64
65 /**
66 * @param time a time value in milliseconds
67 * @param pattern the formatting pattern to apply
68 * @param precision the precision to apply
69 * @param tz the timezone for the instance
70 * @see Dates#PRECISION_DAY
71 * @see Dates#PRECISION_SECOND
72 */
73 public Iso8601(final long time, final String pattern, final int precision, java.util.TimeZone tz) {
74 super(Dates.round(time, precision, tz)); //, TimeZone.getTimeZone(TimeZones.GMT_ID)));
75 // format = new SimpleDateFormat(pattern);
76 format = CalendarDateFormatFactory.getInstance(pattern);
77 format.setTimeZone(tz);
78 format.setLenient(CompatibilityHints.isHintEnabled(CompatibilityHints.KEY_RELAXED_PARSING));
79 // use GMT timezone to avoid daylight savings rules affecting floating
80 // time values..
81 // gmtFormat = new SimpleDateFormat(pattern);
82 // gmtFormat.setTimeZone(TimeZone.getTimeZone(TimeZones.GMT_ID));
83 this.precision = precision;
84 }
85
86 /**
87 * @param pattern the formatting pattern to apply
88 * @param precision the precision to apply
89 * @param tz the timezone for the instance
90 * @see Dates#PRECISION_DAY
91 * @see Dates#PRECISION_SECOND
92 */
93 public Iso8601(final String pattern, final int precision, java.util.TimeZone tz) {
94 this(Dates.getCurrentTimeRounded(), pattern, precision, tz);
95 }
96
97 /**
98 * @param time a time value as a date
99 * @param pattern the formatting pattern to apply
100 * @param precision the precision to apply
101 * @param tz the timezone for the instance
102 * @see Dates#PRECISION_DAY
103 * @see Dates#PRECISION_SECOND
104 */
105 public Iso8601(final Date time, final String pattern, final int precision, java.util.TimeZone tz) {
106 this(time.getTime(), pattern, precision, tz);
107 }
108
109 /**
110 * {@inheritDoc}
111 */
112 public String toString() {
113 // if time is floating avoid daylight saving rules when generating
114 // string representation of date..
115 if (!(format.getTimeZone() instanceof TimeZone)) {
116 if (gmtFormat == null) {
117 gmtFormat = (DateFormat) format.clone();
118 gmtFormat.setTimeZone(TimeZone.getTimeZone(TimeZones.GMT_ID));
119 }
120 if (format.getTimeZone().inDaylightTime(this)
121 && format.getTimeZone().inDaylightTime(new Date(getTime() - 1))) {
122
123 return gmtFormat.format(new Date(getTime()
124 + format.getTimeZone().getRawOffset()
125 + format.getTimeZone().getDSTSavings()));
126 // return format.format(new Date(getTime() - format.getTimeZone().getDSTSavings()));
127 }
128 // return gmtFormat.format(new Date(getTime() + format.getTimeZone().getOffset(getTime())));
129 return gmtFormat.format(new Date(getTime() + format.getTimeZone().getRawOffset()));
130 }
131 return format.format(this);
132 }
133
134 /**
135 * @return Returns the format.
136 */
137 protected final DateFormat getFormat() {
138 return format;
139 }
140
141 /**
142 * {@inheritDoc}
143 */
144 public void setTime(final long time) {
145 // need to check for null format due to Android java.util.Date(long) constructor
146 // calling this method..
147 if (format != null) {
148 super.setTime(Dates.round(time, precision, format.getTimeZone()));
149 }
150 else {
151 // XXX: what do we do here??
152 super.setTime(time);
153 }
154 }
155 }

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