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Support for additional non-standard iCalendar objects
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/**
 * 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.caldav.property;

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

/**
 * New property as defined in a RFC draft
 * 
 * @see draft-daboo-valarm-extensions-04
 * 
 * @author probert
 *
 */
public class Proximity extends Property {

  private static final long serialVersionUID = 2182103734645261668L;
  
  public static final String PROPERTY_NAME = "PROXIMITY";
  
  private String value;

    public static final Proximity ARRIVE = new ImmutableProximity("ARRIVE");

    public static final Proximity DEPART = new ImmutableProximity("DEPART");

    public Proximity() {
        super(PROPERTY_NAME, PropertyFactoryImpl.getInstance());
  }

    public Proximity(ParameterList aList, String value) {
        super(PROPERTY_NAME, aList, PropertyFactoryImpl.getInstance());
    setValue(value);
  }

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

  @Override
  public void validate() throws ValidationException {
  }

  @Override
  public String getValue() {
    return value;
  }
  
  private static final class ImmutableProximity extends Proximity {
    private static final long serialVersionUID = -2054338254L;

    private ImmutableProximity(String value) {
      super(new ParameterList(true), value);
    }
    
    public void setValue(String aValue) {
      throw new UnsupportedOperationException("Cannot modify constant instances");
    }
  }

    public static class Factory extends Content.Factory implements PropertyFactory {

    private static final long serialVersionUID = 2099427445505899578L;

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

        public Proximity createProperty(ParameterList parameters, String value) {
      Proximity property = null;
      if (DEPART.getValue().equals(value)) {
        property = DEPART;
      }
      else {
          property = new Proximity(parameters, value);
      }
      return property;
    }
  }

}