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

Tue, 10 Feb 2015 19:58:00 +0100

author
Michael Schloh von Bennewitz <michael@schloh.com>
date
Tue, 10 Feb 2015 19:58:00 +0100
changeset 4
45d57ecba757
parent 0
fb9019fb1bf7
permissions
-rw-r--r--

Upgrade the upgraded ical4j component to use org.apache.commons.lang3.

michael@0 1 /**
michael@0 2 * Copyright (c) 2012, Ben Fortuna
michael@0 3 * All rights reserved.
michael@0 4 *
michael@0 5 * Redistribution and use in source and binary forms, with or without
michael@0 6 * modification, are permitted provided that the following conditions
michael@0 7 * are met:
michael@0 8 *
michael@0 9 * o Redistributions of source code must retain the above copyright
michael@0 10 * notice, this list of conditions and the following disclaimer.
michael@0 11 *
michael@0 12 * o Redistributions in binary form must reproduce the above copyright
michael@0 13 * notice, this list of conditions and the following disclaimer in the
michael@0 14 * documentation and/or other materials provided with the distribution.
michael@0 15 *
michael@0 16 * o Neither the name of Ben Fortuna nor the names of any other contributors
michael@0 17 * may be used to endorse or promote products derived from this software
michael@0 18 * without specific prior written permission.
michael@0 19 *
michael@0 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
michael@0 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
michael@0 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
michael@0 23 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
michael@0 24 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
michael@0 25 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
michael@0 26 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
michael@0 27 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
michael@0 28 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
michael@0 29 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
michael@0 30 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
michael@0 31 */
michael@0 32 package net.fortuna.ical4j.model;
michael@0 33
michael@0 34 import java.io.IOException;
michael@0 35 import java.io.Serializable;
michael@0 36 import java.text.DecimalFormat;
michael@0 37 import java.text.NumberFormat;
michael@0 38
michael@0 39 import net.fortuna.ical4j.util.Dates;
michael@0 40
michael@4 41 import org.apache.commons.lang3.builder.HashCodeBuilder;
michael@0 42 import org.apache.commons.logging.Log;
michael@0 43 import org.apache.commons.logging.LogFactory;
michael@0 44
michael@0 45 /**
michael@0 46 * $Id$
michael@0 47 *
michael@0 48 * Created on 26/06/2005
michael@0 49 *
michael@0 50 * Represents a timezone offset from UTC time.
michael@0 51 *
michael@0 52 * @author Ben Fortuna
michael@0 53 */
michael@0 54 public class UtcOffset implements Serializable {
michael@0 55
michael@0 56 private static final long serialVersionUID = 5883111996721531728L;
michael@0 57
michael@0 58 private static final int HOUR_START_INDEX = 1;
michael@0 59
michael@0 60 private static final int HOUR_END_INDEX = 3;
michael@0 61
michael@0 62 private static final int MINUTE_START_INDEX = 3;
michael@0 63
michael@0 64 private static final int MINUTE_END_INDEX = 5;
michael@0 65
michael@0 66 private static final int SECOND_START_INDEX = 5;
michael@0 67
michael@0 68 private static final int SECOND_END_INDEX = 7;
michael@0 69
michael@0 70 private static final NumberFormat HOUR_FORMAT = new DecimalFormat("00");
michael@0 71
michael@0 72 private static final NumberFormat MINUTE_FORMAT = new DecimalFormat("00");
michael@0 73
michael@0 74 private static final NumberFormat SECOND_FORMAT = new DecimalFormat("00");
michael@0 75
michael@0 76 private long offset;
michael@0 77
michael@0 78 /**
michael@0 79 * @param value a string representation of an offset
michael@0 80 */
michael@0 81 public UtcOffset(final String value) {
michael@0 82
michael@0 83 if (value.length() < MINUTE_END_INDEX) {
michael@0 84 throw new IllegalArgumentException("Invalid UTC offset [" + value
michael@0 85 + "] - must be of the form: (+/-)HHMM[SS]");
michael@0 86 }
michael@0 87
michael@0 88 final boolean negative = value.charAt(0) == '-';
michael@0 89
michael@0 90 if (!negative && !(value.charAt(0) == '+')) {
michael@0 91 throw new IllegalArgumentException("UTC offset value must be signed");
michael@0 92 }
michael@0 93
michael@0 94 offset = 0;
michael@0 95 offset += Integer.parseInt(value.substring(HOUR_START_INDEX,
michael@0 96 HOUR_END_INDEX))
michael@0 97 * Dates.MILLIS_PER_HOUR;
michael@0 98 offset += Integer.parseInt(value.substring(MINUTE_START_INDEX,
michael@0 99 MINUTE_END_INDEX))
michael@0 100 * Dates.MILLIS_PER_MINUTE;
michael@0 101 if (value.length() == SECOND_END_INDEX) {
michael@0 102 offset += Integer.parseInt(value.substring(SECOND_START_INDEX,
michael@0 103 SECOND_END_INDEX))
michael@0 104 * Dates.MILLIS_PER_SECOND;
michael@0 105 }
michael@0 106 if (negative) {
michael@0 107 offset = -offset;
michael@0 108 }
michael@0 109 }
michael@0 110
michael@0 111 /**
michael@0 112 * @param offset an offset value in milliseconds
michael@0 113 */
michael@0 114 public UtcOffset(final long offset) {
michael@0 115 this.offset = (long) Math.floor(offset / (double) Dates.MILLIS_PER_SECOND) * Dates.MILLIS_PER_SECOND;
michael@0 116 }
michael@0 117
michael@0 118 /**
michael@0 119 * {@inheritDoc}
michael@0 120 */
michael@0 121 public final String toString() {
michael@0 122 final StringBuffer b = new StringBuffer();
michael@0 123 long remainder = Math.abs(offset);
michael@0 124
michael@0 125 if (offset < 0) {
michael@0 126 b.append('-');
michael@0 127 }
michael@0 128 else {
michael@0 129 b.append('+');
michael@0 130 }
michael@0 131 b.append(HOUR_FORMAT.format(remainder / Dates.MILLIS_PER_HOUR));
michael@0 132
michael@0 133 remainder = remainder % Dates.MILLIS_PER_HOUR;
michael@0 134 b.append(MINUTE_FORMAT.format(remainder / Dates.MILLIS_PER_MINUTE));
michael@0 135
michael@0 136 remainder = remainder % Dates.MILLIS_PER_MINUTE;
michael@0 137 if (remainder > 0) {
michael@0 138 b.append(SECOND_FORMAT.format(remainder / Dates.MILLIS_PER_SECOND));
michael@0 139 }
michael@0 140 return b.toString();
michael@0 141 }
michael@0 142
michael@0 143 /**
michael@0 144 * @return Returns the offset.
michael@0 145 */
michael@0 146 public final long getOffset() {
michael@0 147 return offset;
michael@0 148 }
michael@0 149
michael@0 150 /**
michael@0 151 * {@inheritDoc}
michael@0 152 */
michael@0 153 public final boolean equals(final Object arg0) {
michael@0 154 if (arg0 instanceof UtcOffset) {
michael@0 155 return getOffset() == ((UtcOffset) arg0).getOffset();
michael@0 156 }
michael@0 157 return super.equals(arg0);
michael@0 158 }
michael@0 159
michael@0 160 /**
michael@0 161 * {@inheritDoc}
michael@0 162 */
michael@0 163 public final int hashCode() {
michael@0 164 return new HashCodeBuilder().append(getOffset()).toHashCode();
michael@0 165 }
michael@0 166 }

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