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Support for additional non-standard iCalendar objects
There is a newer version: 2.0.0
/**
 * 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.extensions.property;

import net.fortuna.ical4j.model.*;
import net.fortuna.ical4j.validate.ParameterValidator;
import net.fortuna.ical4j.validate.ValidationException;
import net.fortuna.ical4j.validate.ValidationResult;

import java.time.ZoneId;

/**
 * @author fortuna
 */
public class WrTimezone extends Property {

    private static final long serialVersionUID = 7248705823074186148L;

    public static final String PROPERTY_NAME = "X-WR-TIMEZONE";

    private String value;

    /**
     */
    public WrTimezone() {
        super(PROPERTY_NAME);
    }

    /**
     * @param aList
     */
    public WrTimezone(ParameterList aList, String value) {
        super(PROPERTY_NAME, aList);
        setValue(value);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void setValue(String aValue) {
        this.value = aValue;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public ValidationResult validate() throws ValidationException {
        ParameterValidator.assertOneOrLess(Parameter.VALUE,
                getParameters());
        return ValidationResult.EMPTY;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public String getValue() {
        return value;
    }

    @Override
    protected PropertyFactory newFactory() {
        return new Factory();
    }


    /**
     * Provides a {@link ZoneId} representation of this instance. If created with a local timezone registry the
     * returned value will provide the corresponding globally unique value.
     *
     * @return a zone id represented by this instance
     */
    public ZoneId toZoneId() {
        return toZoneId(null);
    }

    /**
     * @param timeZoneRegistry
     * @return
     */
    public ZoneId toZoneId(TimeZoneRegistry timeZoneRegistry) {
        if (timeZoneRegistry != null && !timeZoneRegistry.getZoneRules().isEmpty()) {
            return timeZoneRegistry.getZoneId(getValue());
        } else {
            return TimeZoneRegistry.getGlobalZoneId(getValue());
        }
    }

    public static class Factory extends Content.Factory implements PropertyFactory {

        private static final long serialVersionUID = 3538377735326578201L;

        public Factory() {
            super(PROPERTY_NAME);
        }

        public WrTimezone createProperty() {
            return new WrTimezone();
        }

        public WrTimezone createProperty(ParameterList parameters, String value) {
            WrTimezone property = new WrTimezone(parameters, value);
            return property;
        }
    }
}