javax.sdp.TimeDescription Maven / Gradle / Ivy
/*
* TimeDescription.java
*
* Created on January 9, 2002, 11:13 AM
*/
package android.javax.sdp;
import java.io.*;
import java.util.*;
/** A TimeDescription represents the fields present within a SDP time description.
*
* Quoting from RFC 2327:
*
* Multiple "t=" fields may be used if a session is active at multiple
* irregularly spaced times; each additional
* "t=" field specifies an additional period of time for which the session
* will be active. If the session is active at
* regular times, an "r=" field (see below) should be used in addition to and
* following a "t=" field - in which
* case the "t=" field specifies the start and stop times of the repeat sequence.
*
* Please refer to IETF RFC 2327 for a description of SDP.
*
* @author deruelle
* @version 1.0
*/
public interface TimeDescription extends Serializable, Cloneable {
/** Constant used to translate between NTP time used in SDP and "native" Java time.
* NTP time is defined as the
* number of seconds relative to midnight, January 1, 1900 and Java time is
* measured in number of milliseconds
* since midnight, January 1, 1970 UTC (see System#currentTimeMillis()}).
*
* The value of this constant is 2208988800L. It can be used to convert between
* NTP and Java time using the
* following formulas:
*
* ntpTime = javaTime/1000 * SdpConstants.NTP_CONST;
* javaTime = (ntpTime - SdpConstants.NTP_CONST) * 1000;
*
*
* The Network Time Protocol (NTP) is defined in RFC 1305.
*/
public static final long NTP_CONST=2208988800L;
/** Returns the Time field.
* @return Time
*/
public Time getTime()throws SdpParseException;
/** Sets the Time field.
* @param t Time to set
* @throws SdpException if the time is null
*/
public void setTime(Time t)
throws SdpException;
/** Returns the list of repeat times (r= fields) specified in the SessionDescription.
* @param create boolean to set
* @return Vector
*/
public Vector getRepeatTimes(boolean create);
/** Returns the list of repeat times (r= fields) specified in the SessionDescription.
* @param repeatTimes Vector to set
* @throws SdpException if the parameter is null
*/
public void setRepeatTimes(Vector repeatTimes)
throws SdpException;
}