/*
 * $Id$
 *
 * 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 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;

/**
 * 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;

    /**
     * @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;
    }

    /**
     * @param date The date to set.
     */
    public final void setDate(final Date date) {
        this.date = date;
    }

    /**
     * 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) {
        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(getParameters().getParameter(Parameter.TZID));
            TzId tzId = new TzId(timezone.getID());
            getParameters().add(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(getParameters().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 {
        super.validate();
        Value value = (Value) getParameters().getParameter(Parameter.VALUE);
        if (value != null && !Value.DATE.equals(value) && !Value.DATE_TIME.equals(value)) {
            throw new ValidationException("Invalid VALUE parameter [" + value + "]");
        }
        if ((Value.DATE.equals(value) && getDate() instanceof DateTime)
                || (Value.DATE_TIME.equals(value) && !(getDate() instanceof DateTime))) {
            throw new ValidationException("VALUE parameter [" + value + "] is invalid for date instance");
        }
        if (getDate() instanceof DateTime) {
            DateTime dateTime = (DateTime) date;
            // ensure tzid matches date-time timezone..
            Parameter tzId = getParameters().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() + "]");
            }
        }
    }
}

@@ -1897,16 +1897,73 @@
 meZone;%0A
+import net.fortuna.ical4j.model.TimeZoneRegistryFactory;%0A
 import n
@@ -2835,93 +2835,605 @@
   * 
-@param date The date to set.%0A     */%0A    public final void setDate(final Date date) %7B
+Sets the date value of this property. If a TZID parameter is specified%0A     * for this property and the date value is a DATE-TIME instance, the%0A     * DATE-TIME's timezone will be updated accordingly.%0A     * @param date The date to set.%0A     */%0A    public final void setDate(final Date date) %7B%0A        Parameter tzId = getParameters().getParameter(Parameter.TZID);%0A        if (tzId != null && date instanceof DateTime) %7B%0A            TimeZone timezone = TimeZoneRegistryFactory.getInstance().getRegistry().getTimeZone(tzId.getValue());%0A            ((DateTime) date).setTimeZone(timezone);%0A        %7D
 %0A   

Fix bug where new date values' timezones are not correctly updated