/*
* Portions Copyright 2000-2007 Sun Microsystems, Inc. All Rights
* Reserved. Use is subject to license terms.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
* 2 only, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License version 2 for more details (a copy is
* included at /legal/license.txt).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this work; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 or visit www.sun.com if you need additional
* information or have any questions.
*/
package gov.nist.javax.sdp;
import gov.nist.javax.sdp.fields.*;
import gov.nist.javax.sdp.parser.*;
import java.util.*;
import gov.nist.core.*;
/**
* The SdpFactory enables applications to encode and decode SDP messages.
* The SdpFactory can be used to construct a SessionDescription
* object programmatically.
* The SdpFactory can also be used to construct a
* SessionDescription based on the
* contents of a String.
* Please refer to IETF RFC 2327 for a description of SDP.
*
* <a href="{@docRoot}/uncopyright.html">This code is in the public domain.</a>
*
* @version 1.0
*
*/
public class SdpFactory extends Object {
/** Session description. */
protected static Vector sessionDescriptionsList;
/** Creates new SdpFactory */
public SdpFactory() {
sessionDescriptionsList = new Vector();
}
/**
* Obtains an instance of an SdpFactory.
* <p>
* This static method returns a factory instance.
* <p>
* Once an application has obtained a reference to an SdpFactory it can use
* the factory to
* configure and obtain parser instances and to create SDP objects.
* @throws SdpException if a factory can not be accessed
* @return a factory instance
*/
public static SdpFactory getInstance()
throws SdpException {
return new SdpFactory();
}
/**
* Creates a new, empty SessionDescription. The session is set as follows:
* <pre>
* v=0
*
* o=this.createOrigin ("user",
* InetAddress.getLocalHost().toString());
*
* s=-
*
* t=0 0
* </pre>
* @throws SdpException if there is a problem
* constructing the SessionDescription.
* @return a new, empty SessionDescription.
*/
public SessionDescriptionImpl createSessionDescription()
throws SdpException {
SessionDescriptionImpl
sessionDescriptionImpl = new SessionDescriptionImpl();
ProtoVersionField ProtoVersionField = new ProtoVersionField();
ProtoVersionField.setVersion(0);
sessionDescriptionImpl.setVersion(ProtoVersionField);
OriginField originImpl = null;
originImpl = (OriginField)this.createOrigin("user",
"127.0.0.1");
sessionDescriptionImpl.setOrigin(originImpl);
SessionNameField sessionNameImpl = new SessionNameField();
sessionNameImpl.setValue("-");
sessionDescriptionImpl.setSessionName(sessionNameImpl);
TimeDescriptionImpl timeDescriptionImpl = new TimeDescriptionImpl();
TimeField timeImpl = new TimeField();
timeImpl.setZero();
timeDescriptionImpl.setTime(timeImpl);
Vector times = new Vector();
times.addElement(timeDescriptionImpl);
sessionDescriptionImpl.setTimeDescriptions(times);
sessionDescriptionsList.addElement(sessionDescriptionImpl);
return sessionDescriptionImpl;
}
/**
* Creates a SessionDescription populated with the information
* contained within the string parameter.
* <p>
* Note: unknown field types should not cause exceptions.
* @param s s - the sdp message that is to be parsed.
* @throws SdpParseException if there is a
* problem parsing the String.
* @return a populated SessionDescription object.
*/
public SessionDescriptionImpl createSessionDescription(String s)
throws SdpParseException {
try {
SDPAnnounceParser sdpParser = new SDPAnnounceParser(s);
return sdpParser.parse();
} catch (ParseException e) {
e.printStackTrace();
throw new SdpParseException(0, 0, "Could not parse message");
}
}
/**
* Returns Bandwidth object with the specified values.
* @param modifier the bandwidth type
* @param value the bandwidth value measured in kilobits per second
* @return bandwidth
*/
public BandwidthField createBandwidth(String modifier,
int value) {
BandwidthField bandWidthImpl = new BandwidthField();
try {
bandWidthImpl.setType(modifier);
bandWidthImpl.setValue(value);
}
catch (SdpException s) {
s.printStackTrace();
}
return bandWidthImpl;
}
/**
* Returns Attribute object with the specified values.
* @param name the name of the attribute
* @param value the value of the attribute
* @return the Attribute
*/
public AttributeField createAttribute(String name,
String value) {
AttributeField attributeImpl = new AttributeField();
try {
attributeImpl.setName(name);
attributeImpl.setValue(value);
}
catch (SdpException s) {
s.printStackTrace();
}
return attributeImpl;
}
/**
* Returns Info object with the specified value.
* @param value the string containing the description.
* @return Info
*/
public InformationField createInfo(String value) {
InformationField infoImpl = new InformationField();
try {
infoImpl.setValue(value);
}
catch (SdpException s) {
s.printStackTrace();
}
return infoImpl;
}
/**
* Returns Phone object with the specified value.
* @param value the string containing the description.
* @return Phone
*/
public PhoneField createPhone(String value) {
PhoneField phoneImpl = new PhoneField();
try {
phoneImpl.setValue(value);
}
catch (SdpException s) {
s.printStackTrace();
}
return phoneImpl;
}
/**
* Returns EMail object with the specified value.
* @param value the string containing the description.
* @return EMail
*/
public EmailField createEMail(String value) {
EmailField emailImpl = new EmailField();
try {
emailImpl.setValue(value);
}
catch (SdpException s) {
s.printStackTrace();
}
return emailImpl;
}
/**
* Returns URI object with the specified value.
* @param value the URL containing the description.
* @throws SdpException
* @return URI
*/
public URIField createURI(String value)
throws SdpException {
URIField uriImpl = new URIField();
uriImpl.setURI(value);
return uriImpl;
}
/**
* Returns SessionName object with the specified name.
* @param name the string containing the name of the session.
* @return SessionName
*/
public SessionNameField createSessionName(String name) {
SessionNameField sessionNameImpl = new SessionNameField();
try {
sessionNameImpl.setValue(name);
}
catch (SdpException s) {
s.printStackTrace();
}
return sessionNameImpl;
}
/**
* Returns Key object with the specified value.
* @param method the string containing the method type.
* @param key the key to set
* @return Key
*/
public KeyField createKey(String method,
String key) {
KeyField keyImpl = new KeyField();
try {
keyImpl.setMethod(method);
keyImpl.setKey(key);
}
catch (SdpException s) {
s.printStackTrace();
return null;
}
return keyImpl;
}
/**
* Returns Version object with the specified values.
* @param value the version number.
* @return Version
*/
public ProtoVersionField createVersion(int value) {
ProtoVersionField protoVersionField = new ProtoVersionField();
try {
protoVersionField.setVersion(value);
}
catch (SdpException s) {
s.printStackTrace();
return null;
}
return protoVersionField;
}
/**
* Returns Media object with the specified properties.
* @param media the media type, eg "audio"
* @param port port number on which to receive media
* @param numPorts number of ports used for this media stream
* @param transport transport type, eg "RTP/AVP"
* @param staticRtpAvpTypes vector to set
* @throws SdpException
* @return Media
*/
public MediaField createMedia(String media,
int port,
int numPorts,
String transport,
Vector staticRtpAvpTypes)
throws SdpException {
MediaField mediaImpl = new MediaField();
mediaImpl.setMediaType(media);
mediaImpl.setMediaPort(port);
mediaImpl.setPortCount(numPorts);
mediaImpl.setProtocol(transport);
mediaImpl.setMediaFormats(staticRtpAvpTypes);
return mediaImpl;
}
/**
* Returns Origin object with the specified properties.
* @param userName the user name.
* @param address the IP4 encoded address.
* @throws SdpException if the parameters are null
* @return Origin
*/
public OriginField createOrigin(String userName,
String address)
throws SdpException {
OriginField originImpl = new OriginField();
originImpl.setUsername(userName);
originImpl.setAddress(address);
// need revisit - originImpl.setNetworkType(SDPKeywords.IN);
originImpl.setAddressType(SDPKeywords.IPV4);
return originImpl;
}
/**
* Returns Origin object with the specified properties.
* @param userName String containing the user that created the
* string.
* @param sessionId long containing the session identifier.
* @param sessionVersion long containing the session version.
* @param networkType String network type for the origin (usually
* "IN").
* @param addrType String address type (usually "IP4").
* @param address String IP address usually the address of the
* host.
* @throws SdpException if the parameters are null
* @return Origin object with the specified properties.
*/
public OriginField createOrigin(String userName,
long sessionId,
long sessionVersion,
String networkType,
String addrType,
String address)
throws SdpException {
OriginField originImpl = new OriginField();
originImpl.setUsername(userName);
originImpl.setAddress(address);
originImpl.setSessionId(sessionId);
originImpl.setSessionVersion(sessionVersion);
originImpl.setAddressType(addrType);
originImpl.setNetworkType(networkType);
return originImpl;
}
/**
* Returns MediaDescription object with the specified properties.
* The returned object will respond to
* Media.getMediaFormats(boolean) with a Vector of media formats.
* @param media media -
* @param port port number on which to receive media
* @param numPorts number of ports used for this media stream
* @param transport transport type, eg "RTP/AVP"
* @param staticRtpAvpTypes list of static RTP/AVP media payload
* types which should be specified by the
* returned MediaDescription throws IllegalArgumentException if passed
* an invalid RTP/AVP payload type
* @throws IllegalArgumentException
* @throws SdpException
* @return MediaDescription
*/
public MediaDescriptionImpl createMediaDescription(String media,
int port,
int numPorts,
String transport,
int[] staticRtpAvpTypes)
throws IllegalArgumentException,
SdpException {
MediaDescriptionImpl
mediaDescriptionImpl = new MediaDescriptionImpl();
MediaField mediaImpl = new MediaField();
mediaImpl.setMediaType(media);
mediaImpl.setMediaPort(port);
mediaImpl.setPortCount(numPorts);
mediaImpl.setProtocol(transport);
mediaDescriptionImpl.setMedia(mediaImpl);
return mediaDescriptionImpl;
}
/**
* Returns MediaDescription object with the specified properties.
* The returned object will respond to
* Media.getMediaFormats(boolean) with a Vector of String objects
* specified by the 'formats argument.
* @param media the media type, eg "audio"
* @param port port number on which to receive media
* @param numPorts number of ports used for this media stream
* @param transport transport type, eg "RTP/AVP"
* @param formats list of formats which should be specified by the
* returned MediaDescription
* @return MediaDescription
*/
public MediaDescriptionImpl createMediaDescription(String media,
int port,
int numPorts,
String transport,
String[] formats) {
MediaDescriptionImpl mediaDescriptionImpl = new MediaDescriptionImpl();
try {
MediaField mediaImpl = new MediaField();
mediaImpl.setMediaType(media);
mediaImpl.setMediaPort(port);
mediaImpl.setPortCount(numPorts);
mediaImpl.setProtocol(transport);
Vector formatsV = new Vector(formats.length);
for (int i = 0; i < formats.length; i++)
formatsV.addElement(formats[i]);
mediaImpl.setMediaFormats(formatsV);
mediaDescriptionImpl.setMedia(mediaImpl);
} catch (SdpException s) {
s.printStackTrace();
}
return mediaDescriptionImpl;
}
/**
* Returns TimeDescription object with the specified properties.
* @param t the Time that the time description applies to. Returns
* TimeDescription object with the specified properties.
* @throws SdpException
* @return TimeDescription
*/
public TimeDescriptionImpl createTimeDescription(TimeField t)
throws SdpException {
TimeDescriptionImpl timeDescriptionImpl = new TimeDescriptionImpl();
timeDescriptionImpl.setTime(t);
return timeDescriptionImpl;
}
/**
* Returns TimeDescription unbounded (i.e. "t=0 0");
* @throws SdpException
* @return TimeDescription unbounded (i.e. "t=0 0");
*/
public TimeDescriptionImpl createTimeDescription()
throws SdpException {
TimeDescriptionImpl timeDescriptionImpl = new TimeDescriptionImpl();
TimeField timeImpl = new TimeField();
timeImpl.setZero();
timeDescriptionImpl.setTime(timeImpl);
return timeDescriptionImpl;
}
/**
* Returns TimeDescription object with the specified properties.
* @param start start time.
* @param stop stop time.
* @throws SdpException if the parameters are null
* @return TimeDescription
*/
public TimeDescriptionImpl createTimeDescription(Date start,
Date stop)
throws SdpException {
TimeDescriptionImpl timeDescriptionImpl = new TimeDescriptionImpl();
TimeField timeImpl = new TimeField();
timeImpl.setStart(start);
timeImpl.setStop(stop);
timeDescriptionImpl.setTime(timeImpl);
return timeDescriptionImpl;
}
/**
* Returns a String containing the computed form for a
* multi-connection address.
* @param addr connection address
* @param ttl time to live (TTL) for multicast
* addresses
* @param numAddrs number of addresses used by the
* connection
* @return computed form for a multi-connection address.
*/
public String formatMulticastAddress(String addr,
int ttl,
int numAddrs) {
String res = addr + "/" + ttl + "/"+numAddrs;
return res;
}
/**
* Returns a Connection object with the specified properties a
* @param netType network type, eg "IN" for "Internet"
* @param addrType address type, eg "IP4" for IPv4 type addresses
* @param addr connection address
* @param ttl time to live (TTL) for multicast addresses
* @param numAddrs number of addresses used by the connection
* @return Connection
*/
public ConnectionField createConnection(String netType,
String addrType,
String addr,
int ttl,
int numAddrs)throws SdpException {
ConnectionField connectionImpl = new ConnectionField();
connectionImpl.setNetworkType(netType);
connectionImpl.setAddressType(addrType);
connectionImpl.setAddress(addr);
return connectionImpl;
}
/**
* Returns a Connection object with the specified properties and no
* TTL and a default number of addresses (1).
* @param netType network type, eg "IN" for "Internet"
* @param addrType address type, eg "IP4" for IPv4 type addresses
* @param addr connection address
* @throws SdpException if the parameters are null
* @return Connection
*/
public ConnectionField createConnection(String netType,
String addrType,
String addr)
throws SdpException {
ConnectionField connectionImpl = new ConnectionField();
connectionImpl.setNetworkType(netType);
connectionImpl.setAddressType(addrType);
connectionImpl.setAddress(addr);
return connectionImpl;
}
/**
* Returns a Connection object with the specified properties and a
* network and address type of "IN" and "IP4" respectively.
* @param addr connection address
* @param ttl time to live (TTL) for multicast addresses
* @param numAddrs number of addresses used by the connection
* @return Connection
*/
public ConnectionField createConnection(String addr,
int ttl,
int numAddrs) throws SdpException {
ConnectionField connectionImpl = new ConnectionField();
connectionImpl.setAddress(addr);
return connectionImpl;
}
/**
* Returns a Connection object with the specified address. This is
* equivalent to
*
* createConnection("IN", "IP4", addr);
*
* @param addr connection address
* @throws SdpException if the parameter is null
* @return Connection
*/
public ConnectionField createConnection(String addr)
throws SdpException {
return createConnection("IN", " IPV4", addr);
}
/**
* Returns a Time specification with the specified start and stop
* times.
* @param start start time
* @param stop stop time
* @throws SdpException if the parameters are null
* @return a Time specification with the specified start and stop
* times.
*/
public TimeField createTime(Date start,
Date stop)
throws SdpException {
TimeField timeImpl = new TimeField();
timeImpl.setStart(start);
timeImpl.setStop(stop);
return timeImpl;
}
/**
* Returns an unbounded Time specification (i.e., "t=0 0").
* @throws SdpException
* @return an unbounded Time specification (i.e., "t=0 0").
*/
public TimeField createTime()
throws SdpException {
TimeField timeImpl = new TimeField();
timeImpl.setZero();
return timeImpl;
}
/**
* Returns a RepeatTime object with the specified interval,
* duration, and time offsets.
* @param repeatInterval the "repeat interval" in seconds
* @param activeDuration the "active duration" in seconds
* @param offsets the list of offsets relative to the start time of
* the Time object with which the returned RepeatTime will be
* associated
* @return RepeatTime
*/
public RepeatField createRepeatTime(int repeatInterval,
int activeDuration,
int[] offsets) {
RepeatField repeatTimeField = new RepeatField();
try {
repeatTimeField.setRepeatInterval(repeatInterval);
repeatTimeField.setActiveDuration(activeDuration);
repeatTimeField.setOffsetArray(offsets);
}
catch (SdpException s) {
s.printStackTrace();
}
return repeatTimeField;
}
/**
* Constructs a timezone adjustment record.
* @param d the Date at which the adjustment is going to take
* place.
* @param offset the adjustment in number of seconds relative to
* the start time of the SessionDescription with which this
* object is associated.
* @return TimeZoneAdjustment
*/
public ZoneField createTimeZoneAdjustment(Date d,
int offset) {
ZoneField timeZoneAdjustmentImpl = new ZoneField();
try {
Hashtable map = new Hashtable();
map.put(d, new Integer(offset));
timeZoneAdjustmentImpl.setZoneAdjustments(map);
}
catch (SdpException s) {
s.printStackTrace();
}
return timeZoneAdjustmentImpl;
}
/**
* Returns a collection of Strings containing session description.
* @param source String containing session descriptions.
* @return a collection of Strings containing session descriptions.
*/
public static Vector findSessions(String source) {
return sessionDescriptionsList;
}
/**
* Converts a NTP to regular date value.
* @param ntpTime long to set
* @return Returns a Date object for a given NTP date value.
*/
public static Date getDateFromNtp(long ntpTime) {
return new Date((ntpTime - SdpConstants.NTP_CONST) * 1000);
}
/**
* Returns a long containing the NTP value for a given Java Date.
* @param d Date to set
* @return long
*/
public static long getNtpTime(Date d) throws SdpParseException {
if (d == null)
return -1;
return ((d.getTime()/1000) + SdpConstants.NTP_CONST);
}
/*
public static void main(String[] args)
throws SdpParseException, SdpException {
String sdpFields = "v=0\r\n"+
"o=phone 1057165447541 1057165447541 IN IP4 123.4.566.156\r\n"+
"s=-\r\n" +
"c=IN IP4 123.4.566.156\r\n"+
"t=0 0\r\n" +
"m=data 3011 tcp OSA\r\n";
SdpFactory sdpFactory = new SdpFactory();
SessionDescriptionImpl sessionDescription =
sdpFactory.createSessionDescription(sdpFields);
System.out.println("sessionDescription = " + sessionDescription);
Vector mediaDescriptions =
sessionDescription.getMediaDescriptions(false);
for (int i = 0; i < mediaDescriptions.size(); i++) {
MediaDescriptionImpl m = (MediaDescriptionImpl)
mediaDescriptions.elementAt(i);
System.out.println("m = " + m.toString());
MediaField media = m.getMedia();
Vector formats = media.getMediaFormats(false);
System.out.println("formats = " + formats);
}
}
*/
}
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