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A Java library for reading and writing iCalendar (*.ics) files
/**
* 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.component;
import net.fortuna.ical4j.model.*;
import net.fortuna.ical4j.model.property.LastModified;
import net.fortuna.ical4j.model.property.Method;
import net.fortuna.ical4j.model.property.TzId;
import net.fortuna.ical4j.model.property.TzUrl;
import net.fortuna.ical4j.util.Strings;
import net.fortuna.ical4j.validate.PropertyValidator;
import net.fortuna.ical4j.validate.ValidationException;
import net.fortuna.ical4j.validate.Validator;
import net.fortuna.ical4j.validate.component.VTimeZoneITIPValidator;
import org.apache.commons.lang3.ObjectUtils;
import org.apache.commons.lang3.builder.HashCodeBuilder;
import java.io.IOException;
import java.net.URISyntaxException;
import java.text.ParseException;
/**
* $Id$ [Apr 5, 2004]
*
* Defines an iCalendar VTIMEZONE component.
*
*
* 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
*
* )
*
*
* @author Ben Fortuna
*/
public class VTimeZone extends CalendarComponent {
private static final long serialVersionUID = 5629679741050917815L;
private final Validator itipValidator = new VTimeZoneITIPValidator();
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;
}
/**
* {@inheritDoc}
*/
public final String toString() {
String b = BEGIN +
':' +
getName() +
Strings.LINE_SEPARATOR +
getProperties() +
observances +
END +
':' +
getName() +
Strings.LINE_SEPARATOR;
return b;
}
/**
* {@inheritDoc}
*/
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");
}
for (final Observance observance : getObservances()) {
observance.validate(recurse);
}
/*
* ; the following is optional, ; and MAY occur more than once x-prop
*/
if (recurse) {
validateProperties();
}
}
/**
* {@inheritDoc}
*/
protected Validator getValidator(Method method) {
return itipValidator;
}
/**
* @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 (final Observance observance : getObservances()) {
final 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);
}
/**
* {@inheritDoc}
*/
public boolean equals(final Object arg0) {
if (arg0 instanceof VTimeZone) {
return super.equals(arg0)
&& ObjectUtils.equals(observances, ((VTimeZone) arg0)
.getObservances());
}
return super.equals(arg0);
}
/**
* {@inheritDoc}
*/
public int hashCode() {
return new HashCodeBuilder().append(getName()).append(getProperties())
.append(getObservances()).toHashCode();
}
/**
* Overrides default copy method to add support for copying observance sub-components.
* @return a copy of the instance
* @throws ParseException where an error occurs parsing data
* @throws IOException where an error occurs reading data
* @throws URISyntaxException where an invalid URI is encountered
* @see net.fortuna.ical4j.model.Component#copy()
*/
public Component copy() throws ParseException, IOException, URISyntaxException {
final VTimeZone copy = (VTimeZone) super.copy();
copy.observances = new ComponentList(observances);
return copy;
}
public static class Factory extends Content.Factory implements ComponentFactory {
public Factory() {
super(VTIMEZONE);
}
@Override
public VTimeZone createComponent() {
return new VTimeZone();
}
@Override
public VTimeZone createComponent(PropertyList properties) {
return new VTimeZone(properties);
}
@Override
public VTimeZone createComponent(PropertyList properties, ComponentList subComponents) {
return new VTimeZone(properties, subComponents);
}
}
}