Caldavsync Sources: src/net/fortuna/ical4j/model/TimeZone.java@fb9019fb1bf7 (annotated)

src/net/fortuna/ical4j/model/TimeZone.java@fb9019fb1bf7 (annotated)

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

Tue, 10 Feb 2015 18:12:00 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Tue, 10 Feb 2015 18:12:00 +0100
changeset 0: fb9019fb1bf7
child 3: 73bdfa70b04e
permissions: -rw-r--r--

Import initial revisions of existing project AndroidCaldavSyncAdapater,
forked from upstream repository at 27e8a0f8495c92e0780d450bdf0c7cec77a03a55.

 /**
  * Copyright (c) 2012, Ben Fortuna
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  *  o Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *
  *  o Redistributions in binary form must reproduce the above copyright
  * notice, this list of conditions and the following disclaimer in the
  * documentation and/or other materials provided with the distribution.
  *
  *  o Neither the name of Ben Fortuna nor the names of any other contributors
  * may be used to endorse or promote products derived from this software
  * without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 package net.fortuna.ical4j.model;
 import java.util.Calendar;
 import java.util.Collections;
 import java.util.Date;
 import java.util.List;
 import net.fortuna.ical4j.model.component.Daylight;
 import net.fortuna.ical4j.model.component.Observance;
 import net.fortuna.ical4j.model.component.VTimeZone;
 import net.fortuna.ical4j.model.property.TzId;
 import net.fortuna.ical4j.model.property.TzOffsetTo;
 /**
  * $Id$
  *
  * Created on 13/09/2005
  *
  * A Java timezone implementation based on an underlying VTimeZone
  * definition.
  * @author Ben Fortuna
  */
 public class TimeZone extends java.util.TimeZone {
     private static final long serialVersionUID = -5620979316746547234L;
     private final VTimeZone vTimeZone;
     private final int rawOffset;
     /**
      * Constructs a new instance based on the specified VTimeZone.
      * @param vTimeZone a VTIMEZONE object instance
      */
     public TimeZone(final VTimeZone vTimeZone) {
         this.vTimeZone = vTimeZone;
         final TzId tzId = (TzId) vTimeZone.getProperty(Property.TZID);
         setID(tzId.getValue());
         this.rawOffset = getRawOffset(vTimeZone);
     }
     /**
      * {@inheritDoc}
      */
     public final int getOffset(final int era, final int year, final int month, final int day,
             final int dayOfWeek, final int milliseconds) {
         final Calendar cal = Calendar.getInstance();
         cal.set(Calendar.ERA, era);
         cal.set(Calendar.YEAR, year);
         cal.set(Calendar.MONTH, month);
         cal.set(Calendar.DAY_OF_YEAR, day);
         cal.set(Calendar.DAY_OF_WEEK, dayOfWeek);
         cal.set(Calendar.MILLISECOND, milliseconds);
         final Observance observance = vTimeZone.getApplicableObservance(new DateTime(cal.getTime()));
         if (observance != null) {
             final TzOffsetTo offset = (TzOffsetTo) observance.getProperty(Property.TZOFFSETTO);
             return (int) offset.getOffset().getOffset();
         }
         return 0;
     }
     /**
      * {@inheritDoc}
      */
     public int getOffset(long date) {
         final Observance observance = vTimeZone.getApplicableObservance(new DateTime(date));
         if (observance != null) {
             final TzOffsetTo offset = (TzOffsetTo) observance.getProperty(Property.TZOFFSETTO);
             return (int) offset.getOffset().getOffset();
         }
         return 0;
     }
     /**
      * {@inheritDoc}
      */
     public final int getRawOffset() {
         return rawOffset;
     }
     /**
      * Determines if the specified date is in daylight time according to
      * this timezone. This is done by finding the latest supporting
      * observance for the specified date and identifying whether it is
      * daylight time.
      * @param date a date instance
      * @return true if the specified date is in daylight time, otherwise false
      */
     public final boolean inDaylightTime(final Date date) {
         final Observance observance = vTimeZone.getApplicableObservance(new DateTime(date));
         return (observance != null && observance instanceof Daylight);
     }
     /**
      * {@inheritDoc}
      */
     public final void setRawOffset(final int offsetMillis) {
         throw new UnsupportedOperationException("Updates to the VTIMEZONE object must be performed directly");
     }
     /**
      * {@inheritDoc}
      */
     public final boolean useDaylightTime() {
         final ComponentList daylights = vTimeZone.getObservances().getComponents(Observance.DAYLIGHT);
         return (!daylights.isEmpty());
     }
     /**
      * @return Returns the VTimeZone backing this instance.
      */
     public final VTimeZone getVTimeZone() {
         return vTimeZone;
     }
     private static final int getRawOffset(VTimeZone vt) {
         // per spec, rawoffset is the raw offset at the current date
         final DateTime now = new DateTime();
         List seasonalTimes = vt.getObservances().getComponents(Observance.STANDARD);
         // if no standard time use daylight time..
         if (seasonalTimes.size() == 0) {
             seasonalTimes = vt.getObservances().getComponents(Observance.DAYLIGHT);
         }
         Observance latestSeasonalTime = null;
         Date latestOnset = null;
         for (int i = 0; i < seasonalTimes.size(); i++) {
             Observance seasonalTime = (Observance) seasonalTimes.get(i);
             Date onset = seasonalTime.getLatestOnset(now);
             if (onset == null) {
                 continue;
             }
             if (latestOnset == null || onset.after(latestOnset)) {
                 latestOnset = onset;
                 latestSeasonalTime = seasonalTime;
             }
         }
         if (latestSeasonalTime != null) {
             final TzOffsetTo offsetTo = (TzOffsetTo) latestSeasonalTime.getProperty(Property.TZOFFSETTO);
             if (offsetTo != null) {
                 return (int) offsetTo.getOffset().getOffset();
             }
         }
         return 0;
     }
 }

Caldavsync Sources / annotate

src/net/fortuna/ical4j/model/TimeZone.java@fb9019fb1bf7 (annotated)

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