/*
* $Id: RecurrenceId.java,v 1.15 2006/06/22 10:30:16 fortuna Exp $
*
* Created: [Apr 6, 2004]
*
* Copyright (c) 2004, 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.ValidationException;
import net.fortuna.ical4j.util.ParameterValidator;
/**
* Defines a RECURRENCE-ID iCalendar component property.
*
* <pre>
* 4.8.4.4 Recurrence ID
*
* Property Name: RECURRENCE-ID
*
* Purpose: This property is used in conjunction with the "UID" and
* "SEQUENCE" property to identify a specific instance of a recurring
* "VEVENT", "VTODO" or "VJOURNAL" calendar component. The property
* value is the effective value of the "DTSTART" property of the
* recurrence instance.
*
* Value Type: The default value type for this property is DATE-TIME.
* The time format can be any of the valid forms defined for a DATE-TIME
* value type. See DATE-TIME value type definition for specific
* interpretations of the various forms. The value type can be set to
* DATE.
*
* Property Parameters: Non-standard property, value data type, time
* zone identifier and recurrence identifier range parameters can be
* specified on this property.
*
* Conformance: This property can be specified in an iCalendar object
* containing a recurring calendar component.
*
* Description: The full range of calendar components specified by a
* recurrence set is referenced by referring to just the "UID" property
* value corresponding to the calendar component. The "RECURRENCE-ID"
* property allows the reference to an individual instance within the
* recurrence set.
*
* If the value of the "DTSTART" property is a DATE type value, then the
* value MUST be the calendar date for the recurrence instance.
*
* The date/time value is set to the time when the original recurrence
* instance would occur; meaning that if the intent is to change a
* Friday meeting to Thursday, the date/time is still set to the
* original Friday meeting.
*
* The "RECURRENCE-ID" property is used in conjunction with the "UID"
* and "SEQUENCE" property to identify a particular instance of a
* recurring event, to-do or journal. For a given pair of "UID" and
* "SEQUENCE" property values, the "RECURRENCE-ID" value for a
* recurrence instance is fixed. When the definition of the recurrence
* set for a calendar component changes, and hence the "SEQUENCE"
* property value changes, the "RECURRENCE-ID" for a given recurrence
* instance might also change.The "RANGE" parameter is used to specify
* the effective range of recurrence instances from the instance
* specified by the "RECURRENCE-ID" property value. The default value
* for the range parameter is the single recurrence instance only. The
* value can also be "THISANDPRIOR" to indicate a range defined by the
* given recurrence instance and all prior instances or the value can be
* "THISANDFUTURE" to indicate a range defined by the given recurrence
* instance and all subsequent instances.
*
* Format Definition: The property is defined by the following notation:
*
* recurid = "RECURRENCE-ID" ridparam ":" ridval CRLF
*
* ridparam = *(
*
* ; the following are optional,
* ; but MUST NOT occur more than once
*
* (";" "VALUE" "=" ("DATE-TIME" / "DATE)) /
* (";" tzidparam) / (";" rangeparam) /
*
* ; the following is optional,
* ; and MAY occur more than once
*
* (";" xparam)
*
* )
*
* ridval = date-time / date
* ;Value MUST match value type
* </pre>
*
* @author Ben Fortuna
*/
public class RecurrenceId extends DateProperty {
private static final long serialVersionUID = 4456883817126011006L;
/**
* Default constructor.
*/
public RecurrenceId() {
super(RECURRENCE_ID);
setDate(new DateTime());
}
/**
* @param aList
* a list of parameters for this component
* @param aValue
* a value string for this component
* @throws ParseException
* where the specified value string is not a valid
* date-time/date representation
*/
public RecurrenceId(final ParameterList aList, final String aValue)
throws ParseException {
super(RECURRENCE_ID, aList);
setValue(aValue);
}
/**
* Constructor. Date or Date-Time format is determined based
* on the presence of a VALUE parameter.
* @param aDate
* a date representation of a date or date-time
*/
public RecurrenceId(final Date aDate) {
super(RECURRENCE_ID);
setDate(aDate);
}
/**
* Constructor. Date or Date-Time format is determined based
* on the presence of a VALUE parameter.
* @param aList
* a list of parameters for this component
* @param aDate
* a date representation of a date or date-time
*/
public RecurrenceId(final ParameterList aList, final Date aDate) {
super(RECURRENCE_ID, aList);
setDate(aDate);
}
/**
* @see net.fortuna.ical4j.model.Property#validate()
*/
public final void validate() throws ValidationException {
super.validate();
/*
* ; the following are optional, ; but MUST NOT occur more than once
*
* (";" "VALUE" "=" ("DATE-TIME" / "DATE)) / (";" tzidparam) / (";"
* rangeparam) /
*/
ParameterValidator.getInstance().assertOneOrLess(
Parameter.RANGE, getParameters());
/*
* ; the following is optional, ; and MAY occur more than once
*
* (";" xparam)
*/
}
}