/*
* $Id: DateProperty.java,v 1.14 2006/06/22 10:30:16 fortuna Exp $
*
* Created on 9/07/2005
*
* Copyright (c) 2005, 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.property;
import java.text.ParseException;
import net.fortuna.ical4j.model.Date;
import net.fortuna.ical4j.model.DateTime;
import net.fortuna.ical4j.model.Parameter;
import net.fortuna.ical4j.model.ParameterList;
import net.fortuna.ical4j.model.Property;
import net.fortuna.ical4j.model.TimeZone;
import net.fortuna.ical4j.model.ValidationException;
import net.fortuna.ical4j.model.parameter.TzId;
import net.fortuna.ical4j.model.parameter.Value;
import net.fortuna.ical4j.util.ParameterValidator;
import net.fortuna.ical4j.util.Strings;
/**
* Base class for properties with a DATE or DATE-TIME value. Note that some
* sub-classes may only allow either a DATE or a DATE-TIME value, for which
* additional rules/validation should be specified.
* @author Ben Fortuna
*/
public abstract class DateProperty extends Property {
private Date date;
protected TimeZone timezone;
/**
* @param aName
* @param aList
*/
public DateProperty(final String name, final ParameterList parameters) {
super(name, parameters);
}
/**
* @param aName
*/
public DateProperty(final String name) {
super(name);
}
/**
* @return Returns the date.
*/
public final Date getDate() {
return date;
}
/**
* Sets the date value of this property. The timezone of this instance will
* also be updated accordingly.
* @param date The date to set.
*/
public final void setDate(final Date date) {
if (date instanceof DateTime) {
setTimeZone(((DateTime) date).getTimeZone());
}
this.date = date;
}
/**
* Default setValue() implementation. Allows for either DATE or DATE-TIME
* values.
*/
/* (non-Javadoc)
* @see net.fortuna.ical4j.model.Property#setValue(java.lang.String)
*/
public void setValue(final String value) throws ParseException {
// value can be either a date-time or a date..
if (Value.DATE.equals(getParameter(Parameter.VALUE))) {
this.date = new Date(value);
}
else {
this.date = new DateTime(value, timezone);
}
}
/* (non-Javadoc)
* @see net.fortuna.ical4j.model.Property#getValue()
*/
public String getValue() {
return Strings.valueOf(getDate());
}
/**
* Updates the timezone associated with the property's value. If the specified
* timezone is equivalent to UTC any existing TZID parameters will be removed.
* Note that this method is only applicable where the current date is an
* instance of <code>DateTime</code>. For all other cases an
* <code>UnsupportedOperationException</code> will be thrown.
* @param vTimeZone
*/
public final void setTimeZone(final TimeZone timezone) {
this.timezone = timezone;
if (timezone != null) {
if (getDate() != null && !(getDate() instanceof DateTime)) {
throw new UnsupportedOperationException("TimeZone is not applicable to current value");
}
if (getDate() != null) {
((DateTime) getDate()).setTimeZone(timezone);
}
getParameters().remove(getParameter(Parameter.TZID));
TzId tzId = new TzId(timezone.getID());
getParameters().replace(tzId);
}
else {
// use setUtc() to reset timezone..
setUtc(false);
}
}
/**
* Resets the VTIMEZONE associated with the property. If utc is true,
* any TZID parameters are removed and the Java timezone is updated
* to UTC time. If utc is false, TZID parameters are removed and the
* Java timezone is set to the default timezone (i.e. represents a
* "floating" local time)
* @param utc
*/
public final void setUtc(final boolean utc) {
if (getDate() != null && !(getDate() instanceof DateTime)) {
throw new UnsupportedOperationException("UTC time is not applicable to current value");
}
if (getDate() != null) {
((DateTime) getDate()).setUtc(utc);
}
getParameters().remove(getParameter(Parameter.TZID));
}
/**
* Indicates whether the current date value is specified in UTC time.
* @return
*/
public final boolean isUtc() {
if (getDate() instanceof DateTime) {
return ((DateTime) getDate()).isUtc();
}
return false;
}
/* (non-Javadoc)
* @see net.fortuna.ical4j.model.Property#validate()
*/
public void validate() throws ValidationException {
ParameterValidator.getInstance().assertOneOrLess(
Parameter.VALUE, getParameters());
if (isUtc()) {
ParameterValidator.getInstance().assertNone(
Parameter.TZID, getParameters());
}
else {
ParameterValidator.getInstance().assertOneOrLess(
Parameter.TZID, getParameters());
}
Value value = (Value) getParameter(Parameter.VALUE);
if (getDate() instanceof DateTime) {
if (value != null && !Value.DATE_TIME.equals(value)) {
throw new ValidationException(
"VALUE parameter [" + value
+ "] is invalid for DATE-TIME instance");
}
DateTime dateTime = (DateTime) date;
// ensure tzid matches date-time timezone..
Parameter tzId = getParameter(Parameter.TZID);
if (dateTime.getTimeZone() != null
&& (tzId == null || !tzId.getValue().equals(
dateTime.getTimeZone().getID()))) {
throw new ValidationException(
"TZID parameter [" + tzId
+ "] does not match the timezone ["
+ dateTime.getTimeZone().getID() + "]");
}
}
else if (getDate() != null) {
if (value == null) {
throw new ValidationException(
"VALUE parameter [" + Value.DATE
+ "] must be specified for DATE instance");
}
else if (!Value.DATE.equals(value)) {
throw new ValidationException(
"VALUE parameter [" + value
+ "] is invalid for DATE instance");
}
}
}
}