net.fortuna.ical4j.model.property
Class Sequence

java.lang.Object
  extended by net.fortuna.ical4j.model.Content
      extended by net.fortuna.ical4j.model.Property
          extended by net.fortuna.ical4j.model.property.Sequence
All Implemented Interfaces:
Serializable

public class Sequence
extends Property

$Id$ Created: [Apr 6, 2004] Defines a SEQUENCE iCalendar component property.

     4.8.7.4 Sequence Number
     
        Property Name: SEQUENCE
     
        Purpose: This property defines the revision sequence number of the
        calendar component within a sequence of revisions.
     
        Value Type: integer
     
        Property Parameters: Non-standard property parameters can be
        specified on this property.
     
        Conformance: The property can be specified in "VEVENT", "VTODO" or
        "VJOURNAL" calendar component.
     
        Description: When a calendar component is created, its sequence
        number is zero (US-ASCII decimal 48). It is monotonically incremented
        by the "Organizer's" CUA each time the "Organizer" makes a
        significant revision to the calendar component. When the "Organizer"
        makes changes to one of the following properties, the sequence number
        MUST be incremented:
     
          .  "DTSTART"
     
          .  "DTEND"
     
          .  "DUE"
     
          .  "RDATE"
     
          .  "RRULE"
     
          .  "EXDATE"
     
          .  "EXRULE"
     
          .  "STATUS"
     
        In addition, changes made by the "Organizer" to other properties can
        also force the sequence number to be incremented. The "Organizer" CUA
        MUST increment the sequence number when ever it makes changes to
        properties in the calendar component that the "Organizer" deems will
        jeopardize the validity of the participation status of the
        "Attendees". For example, changing the location of a meeting from one
        locale to another distant locale could effectively impact the
        participation status of the "Attendees".
     
        The "Organizer" includes this property in an iCalendar object that it
        sends to an "Attendee" to specify the current version of the calendar
        component.
     
        The "Attendee" includes this property in an iCalendar object that it
        sends to the "Organizer" to specify the version of the calendar
        component that the "Attendee" is referring to.
     
        A change to the sequence number is not the mechanism that an
        "Organizer" uses to request a response from the "Attendees". The
        "RSVP" parameter on the "ATTENDEE" property is used by the
        "Organizer" to indicate that a response from the "Attendees" is
        requested.
     
        Format Definition: This property is defined by the following
        notation:
     
          seq = "SEQUENCE" seqparam ":" integer CRLF
          ; Default is "0"
     
          seqparam   = *(";" xparam)
     
        Example: The following is an example of this property for a calendar
        component that was just created by the "Organizer".
     
          SEQUENCE:0
     
        The following is an example of this property for a calendar component
        that has been revised two different times by the "Organizer".
     
          SEQUENCE:2
 

Author:
Ben Fortuna
See Also:
Serialized Form

Field Summary
 
Fields inherited from class net.fortuna.ical4j.model.Property
ACTION, ATTACH, ATTENDEE, BUSYTYPE, CALSCALE, CATEGORIES, CLASS, COMMENT, COMPLETED, CONTACT, COUNTRY, CREATED, DESCRIPTION, DTEND, DTSTAMP, DTSTART, DUE, DURATION, EXDATE, EXPERIMENTAL_PREFIX, EXRULE, EXTENDED_ADDRESS, FREEBUSY, GEO, LAST_MODIFIED, LOCALITY, LOCATION, LOCATION_TYPE, METHOD, NAME, ORGANIZER, PERCENT_COMPLETE, POSTALCODE, PRIORITY, PRODID, RDATE, RECURRENCE_ID, REGION, RELATED_TO, REPEAT, REQUEST_STATUS, RESOURCES, RRULE, SEQUENCE, STATUS, STREET_ADDRESS, SUMMARY, TEL, TRANSP, TRIGGER, TZID, TZNAME, TZOFFSETFROM, TZOFFSETTO, TZURL, UID, URL, VERSION
 
Constructor Summary
Sequence()
          Default constructor.
Sequence(int aSequenceNo)
           
Sequence(ParameterList aList, int aSequenceNo)
           
Sequence(ParameterList aList, String aValue)
           
Sequence(String aValue)
           
 
Method Summary
 int getSequenceNo()
           
 String getValue()
          
 void setValue(String aValue)
          Sets the current value of the property.
 void validate()
          Perform validation on a property.
 
Methods inherited from class net.fortuna.ical4j.model.Property
copy, equals, getName, getParameter, getParameters, getParameters, hashCode, isCalendarProperty, toString
 
Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
 

Constructor Detail

Sequence

public Sequence()
Default constructor.


Sequence

public Sequence(String aValue)
Parameters:
aValue - a value string for this component

Sequence

public Sequence(ParameterList aList,
                String aValue)
Parameters:
aList - a list of parameters for this component
aValue - a value string for this component

Sequence

public Sequence(int aSequenceNo)
Parameters:
aSequenceNo - a sequence number

Sequence

public Sequence(ParameterList aList,
                int aSequenceNo)
Parameters:
aList - a list of parameters for this component
aSequenceNo - a sequence number
Method Detail

getSequenceNo

public final int getSequenceNo()
Returns:
Returns the sequenceNo.

setValue

public final void setValue(String aValue)
Sets the current value of the property.

Specified by:
setValue in class Property
Parameters:
aValue - a string representation of the property value

getValue

public final String getValue()

Specified by:
getValue in class Content
Returns:
the content value

validate

public final void validate()
                    throws ValidationException
Perform validation on a property.

Specified by:
validate in class Property
Throws:
ValidationException - where the property is not in a valid state


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