/*
* $Id: VTimeZone.java,v 1.19 2006/04/05 10:52:31 fortuna Exp $ [Apr 5, 2004]
*
* Copyright (c) 2004, 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.component;
import java.util.Iterator;
import net.fortuna.ical4j.model.ComponentList;
import net.fortuna.ical4j.model.Date;
import net.fortuna.ical4j.model.Property;
import net.fortuna.ical4j.model.PropertyList;
import net.fortuna.ical4j.model.ValidationException;
import net.fortuna.ical4j.model.property.LastModified;
import net.fortuna.ical4j.model.property.TzId;
import net.fortuna.ical4j.model.property.TzUrl;
import net.fortuna.ical4j.util.PropertyValidator;
import net.fortuna.ical4j.util.Strings;
/**
* Defines an iCalendar VTIMEZONE component.
*
* <pre>
* 4.6.5 Time Zone Component
*
* Component Name: VTIMEZONE
*
* Purpose: Provide a grouping of component properties that defines a
* time zone.
*
* Formal Definition: A "VTIMEZONE" calendar component is defined by the
* following notation:
*
* timezonec = "BEGIN" ":" "VTIMEZONE" CRLF
*
* 2*(
*
* ; 'tzid' is required, but MUST NOT occur more
* ; than once
*
* tzid /
*
* ; 'last-mod' and 'tzurl' are optional,
* but MUST NOT occur more than once
*
* last-mod / tzurl /
*
* ; one of 'standardc' or 'daylightc' MUST occur
* ..; and each MAY occur more than once.
*
* standardc / daylightc /
*
* ; the following is optional,
* ; and MAY occur more than once
*
* x-prop
*
* )
*
* "END" ":" "VTIMEZONE" CRLF
*
* standardc = "BEGIN" ":" "STANDARD" CRLF
*
* tzprop
*
* "END" ":" "STANDARD" CRLF
*
* daylightc = "BEGIN" ":" "DAYLIGHT" CRLF
*
* tzprop
*
* "END" ":" "DAYLIGHT" CRLF
*
* tzprop = 3*(
*
* ; the following are each REQUIRED,
* ; but MUST NOT occur more than once
*
* dtstart / tzoffsetto / tzoffsetfrom /
*
* ; the following are optional,
* ; and MAY occur more than once
*
* comment / rdate / rrule / tzname / x-prop
*
* )
* </pre>
*
* @author Ben Fortuna
*/
public class VTimeZone extends CalendarComponent {
private static final long serialVersionUID = 5629679741050917815L;
private ComponentList observances;
/**
* Default constructor.
*/
public VTimeZone() {
super(VTIMEZONE);
this.observances = new ComponentList();
}
/**
* Constructs a new instance containing the specified properties.
*
* @param properties
* a list of properties
*/
public VTimeZone(final PropertyList properties) {
super(VTIMEZONE, properties);
this.observances = new ComponentList();
}
/**
* Constructs a new vtimezone component with no properties and the specified
* list of type components.
*
* @param observances
* a list of type components
*/
public VTimeZone(final ComponentList observances) {
super(VTIMEZONE);
this.observances = observances;
}
/**
* Constructor.
*
* @param properties
* a list of properties
* @param observances
* a list of timezone types
*/
public VTimeZone(final PropertyList properties, final ComponentList observances) {
super(VTIMEZONE, properties);
this.observances = observances;
}
/**
* @see java.lang.Object#toString()
*/
public final String toString() {
StringBuffer b = new StringBuffer();
b.append(BEGIN);
b.append(':');
b.append(getName());
b.append(Strings.LINE_SEPARATOR);
b.append(getProperties());
b.append(observances);
b.append(END);
b.append(':');
b.append(getName());
b.append(Strings.LINE_SEPARATOR);
return b.toString();
}
/*
* (non-Javadoc)
*
* @see net.fortuna.ical4j.model.Component#validate(boolean)
*/
public final void validate(final boolean recurse)
throws ValidationException {
/*
* ; 'tzid' is required, but MUST NOT occur more ; than once
*
* tzid /
*/
PropertyValidator.getInstance().assertOne(Property.TZID,
getProperties());
/*
* ; 'last-mod' and 'tzurl' are optional, but MUST NOT occur more than
* once last-mod / tzurl /
*/
PropertyValidator.getInstance().assertOneOrLess(
Property.LAST_MODIFIED, getProperties());
PropertyValidator.getInstance().assertOneOrLess(Property.TZURL,
getProperties());
/*
* ; one of 'standardc' or 'daylightc' MUST occur ..; and each MAY occur
* more than once.
*
* standardc / daylightc /
*/
if (getObservances().getComponent(Observance.STANDARD) == null
&& getObservances().getComponent(Observance.DAYLIGHT) == null) {
throw new ValidationException("Sub-components ["
+ Observance.STANDARD + "," + Observance.DAYLIGHT
+ "] must be specified at least once");
}
/*
* ; the following is optional, ; and MAY occur more than once
*
* x-prop
*/
if (recurse) {
validateProperties();
}
}
/**
* @return Returns the types.
*/
public final ComponentList getObservances() {
return observances;
}
/**
* Returns the latest applicable timezone observance for the specified
* date.
* @param date the latest possible date for a timezone observance onset
* @return the latest applicable timezone observance for the specified
* date or null if there are no applicable observances
*/
public final Observance getApplicableObservance(final Date date) {
Observance latestObservance = null;
Date latestOnset = null;
for (Iterator i = getObservances().iterator(); i.hasNext();) {
Observance observance = (Observance) i.next();
Date onset = observance.getLatestOnset(date);
if (latestOnset == null || (onset != null && onset.after(latestOnset))) {
latestOnset = onset;
latestObservance = observance;
}
}
return latestObservance;
}
/**
* @return the mandatory timezone identifier property
*/
public final TzId getTimeZoneId() {
return (TzId) getProperty(Property.TZID);
}
/**
* @return the optional last-modified property
*/
public final LastModified getLastModified() {
return (LastModified) getProperty(Property.LAST_MODIFIED);
}
/**
* @return the optional timezone url property
*/
public final TzUrl getTimeZoneUrl() {
return (TzUrl) getProperty(Property.TZURL);
}
}