1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/net/fortuna/ical4j/model/UtcOffset.java Tue Feb 10 18:12:00 2015 +0100
1.3 @@ -0,0 +1,166 @@
1.4 +/**
1.5 + * Copyright (c) 2012, Ben Fortuna
1.6 + * All rights reserved.
1.7 + *
1.8 + * Redistribution and use in source and binary forms, with or without
1.9 + * modification, are permitted provided that the following conditions
1.10 + * are met:
1.11 + *
1.12 + * o Redistributions of source code must retain the above copyright
1.13 + * notice, this list of conditions and the following disclaimer.
1.14 + *
1.15 + * o Redistributions in binary form must reproduce the above copyright
1.16 + * notice, this list of conditions and the following disclaimer in the
1.17 + * documentation and/or other materials provided with the distribution.
1.18 + *
1.19 + * o Neither the name of Ben Fortuna nor the names of any other contributors
1.20 + * may be used to endorse or promote products derived from this software
1.21 + * without specific prior written permission.
1.22 + *
1.23 + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
1.24 + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
1.25 + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
1.26 + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
1.27 + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
1.28 + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
1.29 + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
1.30 + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
1.31 + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
1.32 + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
1.33 + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.34 + */
1.35 +package net.fortuna.ical4j.model;
1.36 +
1.37 +import java.io.IOException;
1.38 +import java.io.Serializable;
1.39 +import java.text.DecimalFormat;
1.40 +import java.text.NumberFormat;
1.41 +
1.42 +import net.fortuna.ical4j.util.Dates;
1.43 +
1.44 +import org.apache.commons.lang.builder.HashCodeBuilder;
1.45 +import org.apache.commons.logging.Log;
1.46 +import org.apache.commons.logging.LogFactory;
1.47 +
1.48 +/**
1.49 + * $Id$
1.50 + *
1.51 + * Created on 26/06/2005
1.52 + *
1.53 + * Represents a timezone offset from UTC time.
1.54 + *
1.55 + * @author Ben Fortuna
1.56 + */
1.57 +public class UtcOffset implements Serializable {
1.58 +
1.59 + private static final long serialVersionUID = 5883111996721531728L;
1.60 +
1.61 + private static final int HOUR_START_INDEX = 1;
1.62 +
1.63 + private static final int HOUR_END_INDEX = 3;
1.64 +
1.65 + private static final int MINUTE_START_INDEX = 3;
1.66 +
1.67 + private static final int MINUTE_END_INDEX = 5;
1.68 +
1.69 + private static final int SECOND_START_INDEX = 5;
1.70 +
1.71 + private static final int SECOND_END_INDEX = 7;
1.72 +
1.73 + private static final NumberFormat HOUR_FORMAT = new DecimalFormat("00");
1.74 +
1.75 + private static final NumberFormat MINUTE_FORMAT = new DecimalFormat("00");
1.76 +
1.77 + private static final NumberFormat SECOND_FORMAT = new DecimalFormat("00");
1.78 +
1.79 + private long offset;
1.80 +
1.81 + /**
1.82 + * @param value a string representation of an offset
1.83 + */
1.84 + public UtcOffset(final String value) {
1.85 +
1.86 + if (value.length() < MINUTE_END_INDEX) {
1.87 + throw new IllegalArgumentException("Invalid UTC offset [" + value
1.88 + + "] - must be of the form: (+/-)HHMM[SS]");
1.89 + }
1.90 +
1.91 + final boolean negative = value.charAt(0) == '-';
1.92 +
1.93 + if (!negative && !(value.charAt(0) == '+')) {
1.94 + throw new IllegalArgumentException("UTC offset value must be signed");
1.95 + }
1.96 +
1.97 + offset = 0;
1.98 + offset += Integer.parseInt(value.substring(HOUR_START_INDEX,
1.99 + HOUR_END_INDEX))
1.100 + * Dates.MILLIS_PER_HOUR;
1.101 + offset += Integer.parseInt(value.substring(MINUTE_START_INDEX,
1.102 + MINUTE_END_INDEX))
1.103 + * Dates.MILLIS_PER_MINUTE;
1.104 + if (value.length() == SECOND_END_INDEX) {
1.105 + offset += Integer.parseInt(value.substring(SECOND_START_INDEX,
1.106 + SECOND_END_INDEX))
1.107 + * Dates.MILLIS_PER_SECOND;
1.108 + }
1.109 + if (negative) {
1.110 + offset = -offset;
1.111 + }
1.112 + }
1.113 +
1.114 + /**
1.115 + * @param offset an offset value in milliseconds
1.116 + */
1.117 + public UtcOffset(final long offset) {
1.118 + this.offset = (long) Math.floor(offset / (double) Dates.MILLIS_PER_SECOND) * Dates.MILLIS_PER_SECOND;
1.119 + }
1.120 +
1.121 + /**
1.122 + * {@inheritDoc}
1.123 + */
1.124 + public final String toString() {
1.125 + final StringBuffer b = new StringBuffer();
1.126 + long remainder = Math.abs(offset);
1.127 +
1.128 + if (offset < 0) {
1.129 + b.append('-');
1.130 + }
1.131 + else {
1.132 + b.append('+');
1.133 + }
1.134 + b.append(HOUR_FORMAT.format(remainder / Dates.MILLIS_PER_HOUR));
1.135 +
1.136 + remainder = remainder % Dates.MILLIS_PER_HOUR;
1.137 + b.append(MINUTE_FORMAT.format(remainder / Dates.MILLIS_PER_MINUTE));
1.138 +
1.139 + remainder = remainder % Dates.MILLIS_PER_MINUTE;
1.140 + if (remainder > 0) {
1.141 + b.append(SECOND_FORMAT.format(remainder / Dates.MILLIS_PER_SECOND));
1.142 + }
1.143 + return b.toString();
1.144 + }
1.145 +
1.146 + /**
1.147 + * @return Returns the offset.
1.148 + */
1.149 + public final long getOffset() {
1.150 + return offset;
1.151 + }
1.152 +
1.153 + /**
1.154 + * {@inheritDoc}
1.155 + */
1.156 + public final boolean equals(final Object arg0) {
1.157 + if (arg0 instanceof UtcOffset) {
1.158 + return getOffset() == ((UtcOffset) arg0).getOffset();
1.159 + }
1.160 + return super.equals(arg0);
1.161 + }
1.162 +
1.163 + /**
1.164 + * {@inheritDoc}
1.165 + */
1.166 + public final int hashCode() {
1.167 + return new HashCodeBuilder().append(getOffset()).toHashCode();
1.168 + }
1.169 +}
