/*
* Conditions Of Use
*
* This software was developed by employees of the National Institute of
* Standards and Technology (NIST), an agency of the Federal Government.
* Pursuant to title 15 Untied States Code Section 105, works of NIST
* employees are not subject to copyright protection in the United States
* and are considered to be in the public domain. As a result, a formal
* license is not needed to use the software.
*
* This software is provided by NIST as a service and is expressly
* provided "AS IS." NIST MAKES NO WARRANTY OF ANY KIND, EXPRESS, IMPLIED
* OR STATUTORY, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTY OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT
* AND DATA ACCURACY. NIST does not warrant or make any representations
* regarding the use of the software or the results thereof, including but
* not limited to the correctness, accuracy, reliability or usefulness of
* the software.
*
* Permission to use this software is contingent upon your acceptance
* of the terms of this agreement
*
* .
*
*/
/*
* SessionDescriptionImpl.java
*
* Created on January 10, 2002, 3:11 PM
*/
package gov.nist.javax.sdp;
import java.util.*;
import javax.sdp.*;
import gov.nist.javax.sdp.fields.*;
import java.text.ParseException;
/**
* Implementation of the SessionDescription interface.
*
* @version JSR141-PUBLIC-REVIEW
*
*
* @author Olivier Deruelle
* @author M. Ranganathan <br/>
*
*
*
*/
public class SessionDescriptionImpl implements SessionDescription {
private TimeDescriptionImpl currentTimeDescription;
private MediaDescriptionImpl currentMediaDescription;
protected ProtoVersionField versionImpl;
protected OriginField originImpl;
protected SessionNameField sessionNameImpl;
protected InformationField infoImpl;
protected URIField uriImpl;
protected ConnectionField connectionImpl;
protected KeyField keyImpl;
protected Vector timeDescriptions;
protected Vector mediaDescriptions;
protected Vector zoneAdjustments;
protected Vector emailList;
protected Vector phoneList;
protected Vector bandwidthList;
protected Vector attributesList;
/** Creates new SessionDescriptionImpl */
public SessionDescriptionImpl() {
}
/**
* Copy constructor, creates a deep copy of another SessionDescription.
*
* @param otherSessionDescription - the SessionDescription to copy from.
* @throws SdpException - if there is a problem constructing the SessionDescription.
*/
public SessionDescriptionImpl(SessionDescription otherSessionDescription)
throws SdpException
{
// If the other session description is null there's nothing to initialize
if (otherSessionDescription == null) return;
// OK to clone the version field, no deep copy required
Version otherVersion = otherSessionDescription.getVersion();
if (otherVersion != null) {
this.setVersion((Version) otherVersion.clone());
}
// OK to clone the origin field, class already does a deep copy
Origin otherOrigin = otherSessionDescription.getOrigin();
if (otherOrigin != null) {
this.setOrigin((Origin) otherOrigin.clone());
}
// OK to clone the session name, no deep copy required
SessionName otherSessionName = otherSessionDescription.getSessionName();
if (otherSessionName != null) {
this.setSessionName((SessionName) otherSessionName.clone());
}
// OK to clone the information field, just a string, no deep copy required
Info otherInfo = otherSessionDescription.getInfo();
if (otherInfo != null) {
this.setInfo((Info) otherInfo.clone());
}
// URI field requires deep copy
URIField otherUriField = (URIField) otherSessionDescription.getURI();
if (otherUriField != null) {
URIField newUF = new URIField();
//fixes https://github.com/RestComm/jain-sip/issues/112
//URL is final, we can reuse object in this case
newUF.set(otherUriField.get());
this.setURI(newUF);
}
// OK to clone the connection field, class already does a deep copy
Connection otherConnection = (Connection) otherSessionDescription.getConnection();
if (otherConnection != null) {
this.setConnection((Connection) otherConnection.clone());
}
// OK to clone the key field, just a couple of strings
Key otherKey = (Key) otherSessionDescription.getKey();
if (otherKey != null) {
this.setKey((Key) otherKey.clone());
}
// Deep copy each vector, starting with time descriptions
Vector otherTimeDescriptions = otherSessionDescription.getTimeDescriptions(false);
if (otherTimeDescriptions != null) {
Vector newTDs = new Vector();
Iterator itTimeDescriptions = otherTimeDescriptions.iterator();
while (itTimeDescriptions.hasNext()) {
TimeDescriptionImpl otherTimeDescription = (TimeDescriptionImpl) itTimeDescriptions.next();
if (otherTimeDescription != null) {
TimeField otherTimeField = (TimeField) otherTimeDescription.getTime().clone();
TimeDescriptionImpl newTD = new TimeDescriptionImpl(otherTimeField);
Vector otherRepeatTimes = otherTimeDescription.getRepeatTimes(false);
if (otherRepeatTimes != null) {
Iterator itRepeatTimes = otherRepeatTimes.iterator();
while (itRepeatTimes.hasNext()) {
RepeatField otherRepeatField = (RepeatField) itRepeatTimes.next();
if (otherRepeatField != null) {
// RepeatField clone is a deep copy
RepeatField newRF = (RepeatField) otherRepeatField.clone();
newTD.addRepeatField(newRF);
}
}
}
newTDs.add(newTD);
}
}
this.setTimeDescriptions(newTDs);
}
// Deep copy the email list
Vector otherEmails = otherSessionDescription.getEmails(false);
if (otherEmails != null) {
Vector newEmails = new Vector();
Iterator itEmails = otherEmails.iterator();
while (itEmails.hasNext()) {
EmailField otherEmailField = (EmailField) itEmails.next();
if (otherEmailField != null) {
// Email field clone is a deep copy
EmailField newEF = (EmailField) otherEmailField.clone();
newEmails.add(newEF);
}
}
this.setEmails(newEmails);
}
// Deep copy the phone list
Vector otherPhones = otherSessionDescription.getPhones(false);
if (otherPhones != null) {
Vector newPhones = new Vector();
Iterator itPhones = otherPhones.iterator();
while (itPhones.hasNext()) {
PhoneField otherPhoneField = (PhoneField) itPhones.next();
if (otherPhoneField != null) {
// Phone field clone is a deep copy
PhoneField newPF = (PhoneField) otherPhoneField.clone();
newPhones.add(newPF);
}
}
this.setPhones(newPhones);
}
// Deep copy the zone adjustments list
Vector otherZAs = otherSessionDescription.getZoneAdjustments(false);
if (otherZAs != null) {
Vector newZAs = new Vector();
Iterator itZAs = otherZAs.iterator();
while (itZAs.hasNext()) {
ZoneField otherZoneField = (ZoneField) itZAs.next();
if (otherZoneField != null) {
// Zone field clone is a deep copy
ZoneField newPF = (ZoneField) otherZoneField.clone();
newZAs.add(newPF);
}
}
this.setZoneAdjustments(newZAs);
}
// Deep copy the bandwidth list
Vector otherBandwidths = otherSessionDescription.getBandwidths(false);
if (otherBandwidths != null) {
Vector newBandwidths = new Vector();
Iterator itBandwidths = otherBandwidths.iterator();
while (itBandwidths.hasNext()) {
BandwidthField otherBandwidthField = (BandwidthField) itBandwidths.next();
if (otherBandwidthField != null) {
// Bandwidth field clone() is a shallow copy but object is not deep
BandwidthField newBF = (BandwidthField) otherBandwidthField.clone();
newBandwidths.add(newBF);
}
}
this.setBandwidths(newBandwidths);
}
// Deep copy the attribute list
Vector otherAttributes = otherSessionDescription.getAttributes(false);
if (otherAttributes != null) {
Vector newAttributes = new Vector();
Iterator itAttributes = otherAttributes.iterator();
while (itAttributes.hasNext()) {
AttributeField otherAttributeField = (AttributeField) itAttributes.next();
if (otherAttributeField != null) {
// Attribute field clone() makes a deep copy but be careful: it may use reflection to copy one of its members
AttributeField newBF = (AttributeField) otherAttributeField.clone();
newAttributes.add(newBF);
}
}
this.setAttributes(newAttributes);
}
// Deep copy the media descriptions
Vector otherMediaDescriptions = otherSessionDescription.getMediaDescriptions(false);
if (otherMediaDescriptions != null) {
Vector newMDs = new Vector();
Iterator itMediaDescriptions = otherMediaDescriptions.iterator();
while (itMediaDescriptions.hasNext()) {
MediaDescriptionImpl otherMediaDescription = (MediaDescriptionImpl) itMediaDescriptions.next();
if (otherMediaDescription != null) {
MediaDescriptionImpl newMD = new MediaDescriptionImpl();
// Copy the media field
MediaField otherMediaField = otherMediaDescription.getMediaField();
if (otherMediaField != null) {
// Media field clone() makes a shallow copy, so don't use clone()
MediaField newMF = new MediaField();
newMF.setMedia(otherMediaField.getMedia());
newMF.setPort(otherMediaField.getPort());
newMF.setNports(otherMediaField.getNports());
newMF.setProto(otherMediaField.getProto());
Vector otherFormats = otherMediaField.getFormats();
if (otherFormats != null) {
Vector newFormats = new Vector();
Iterator itFormats = otherFormats.iterator();
while (itFormats.hasNext()) {
Object otherFormat = itFormats.next();
if (otherFormat != null) {
// Convert all format objects to strings in order to avoid reflection
newFormats.add(String.valueOf(otherFormat));
}
}
newMF.setFormats(newFormats);
}
newMD.setMedia(newMF);
}
// Copy the information field (it's a shallow object, ok to clone)
InformationField otherInfoField = otherMediaDescription.getInformationField();
if (otherInfoField != null) {
newMD.setInformationField((InformationField) otherInfoField.clone());
}
// Copy the connection field. OK to use clone(), already does a deep copy.
ConnectionField otherConnectionField = otherMediaDescription.getConnectionField();
if (otherConnectionField != null) {
newMD.setConnectionField((ConnectionField) otherConnectionField.clone());
}
// Copy the bandwidth fields
Vector otherBFs = otherMediaDescription.getBandwidths(false);
if (otherBFs != null) {
Vector newBFs = new Vector();
Iterator itBFs = otherBFs.iterator();
while (itBFs.hasNext()) {
BandwidthField otherBF = (BandwidthField) itBFs.next();
if (otherBF != null) {
// BandwidthField is a shallow object, ok to use clone
newBFs.add((BandwidthField) otherBF.clone());
}
}
newMD.setBandwidths(newBFs);
}
// Copy the key field (shallow object)
KeyField otherKeyField = otherMediaDescription.getKeyField();
if (otherKeyField != null) {
newMD.setKeyField((KeyField) otherKeyField.clone());
}
// Copy the attributes
Vector otherAFs = otherMediaDescription.getAttributeFields();
if (otherAFs != null) {
Vector newAFs = new Vector();
Iterator itAFs = otherAFs.iterator();
while (itAFs.hasNext()) {
AttributeField otherAF = (AttributeField) itAFs.next();
if (otherAF != null) {
// AttributeField clone() already makes a deep copy, but be careful. It will use reflection
// unless the attribute is a String or any other immutable object.
newAFs.add((AttributeField) otherAF.clone());
}
}
newMD.setAttributeFields(newAFs);
}
newMDs.add(newMD);
}
}
this.setMediaDescriptions(newMDs);
}
}
public void addField(SDPField sdpField) throws ParseException {
try {
if (sdpField instanceof ProtoVersionField) {
versionImpl = (ProtoVersionField) sdpField;
} else if (sdpField instanceof OriginField) {
originImpl = (OriginField) sdpField;
} else if (sdpField instanceof SessionNameField) {
sessionNameImpl = (SessionNameField) sdpField;
} else if (sdpField instanceof InformationField) {
if (currentMediaDescription != null)
currentMediaDescription
.setInformationField((InformationField) sdpField);
else
this.infoImpl = (InformationField) sdpField;
} else if (sdpField instanceof URIField) {
uriImpl = (URIField) sdpField;
} else if (sdpField instanceof ConnectionField) {
if (currentMediaDescription != null)
currentMediaDescription
.setConnectionField((ConnectionField) sdpField);
else
this.connectionImpl = (ConnectionField) sdpField;
} else if (sdpField instanceof KeyField) {
if (currentMediaDescription != null)
currentMediaDescription.setKey((KeyField) sdpField);
else
keyImpl = (KeyField) sdpField;
} else if (sdpField instanceof EmailField) {
getEmails(true).add(sdpField);
} else if (sdpField instanceof PhoneField) {
getPhones(true).add(sdpField);
} else if (sdpField instanceof TimeField) {
currentTimeDescription = new TimeDescriptionImpl(
(TimeField) sdpField);
getTimeDescriptions(true).add(currentTimeDescription);
} else if (sdpField instanceof RepeatField) {
if (currentTimeDescription == null) {
throw new ParseException("no time specified", 0);
} else {
currentTimeDescription
.addRepeatField((RepeatField) sdpField);
}
} else if (sdpField instanceof ZoneField) {
getZoneAdjustments(true).add(sdpField);
} else if (sdpField instanceof BandwidthField) {
if (currentMediaDescription != null)
currentMediaDescription
.addBandwidthField((BandwidthField) sdpField);
else
getBandwidths(true).add(sdpField);
} else if (sdpField instanceof AttributeField) {
if (currentMediaDescription != null) {
AttributeField af = (AttributeField) sdpField;
String s = af.getName();
// Bug report from Andreas Bystrom
currentMediaDescription
.addAttribute((AttributeField) sdpField);
} else {
getAttributes(true).add(sdpField);
}
} else if (sdpField instanceof MediaField) {
currentMediaDescription = new MediaDescriptionImpl();
getMediaDescriptions(true).add(currentMediaDescription);
// Bug report from Andreas Bystrom
currentMediaDescription.setMediaField((MediaField) sdpField);
}
} catch (SdpException ex) {
throw new ParseException(sdpField.encode(), 0);
}
}
/**
* Creates and returns a deep copy of this object
*
* @return a clone of this instance.
* @exception CloneNotSupportedException if this instance cannot be cloned.
*/
public Object clone() throws CloneNotSupportedException {
try {
return new SessionDescriptionImpl(this);
} catch (SdpException e) {
// throw this exception to indicate that this instance cannot be cloned
throw new CloneNotSupportedException();
}
}
/**
* Returns the version of SDP in use. This corresponds to the v= field of
* the SDP data.
*
* @return the integer version (-1 if not set).
*/
public Version getVersion() {
return versionImpl;
}
/**
* Sets the version of SDP in use. This corresponds to the v= field of the
* SDP data.
*
* @param v
* version - the integer version.
* @throws SdpException
* if the version is null
*/
public void setVersion(Version v) throws SdpException {
if (v == null)
throw new SdpException("The parameter is null");
if (v instanceof ProtoVersionField) {
versionImpl = (ProtoVersionField) v;
} else
throw new SdpException(
"The parameter must be an instance of VersionField");
}
/**
* Returns information about the originator of the session. This corresponds
* to the o= field of the SDP data.
*
* @return the originator data.
*/
public Origin getOrigin() {
return originImpl;
}
/**
* Sets information about the originator of the session. This corresponds to
* the o= field of the SDP data.
*
* @param origin
* origin - the originator data.
* @throws SdpException
* if the origin is null
*/
public void setOrigin(Origin origin) throws SdpException {
if (origin == null)
throw new SdpException("The parameter is null");
if (origin instanceof OriginField) {
OriginField o = (OriginField) origin;
originImpl = o;
} else
throw new SdpException(
"The parameter must be an instance of OriginField");
}
/**
* Returns the name of the session. This corresponds to the s= field of the
* SDP data.
*
* @return the session name.
*/
public SessionName getSessionName() {
return sessionNameImpl;
}
/**
* Sets the name of the session. This corresponds to the s= field of the SDP
* data.
*
* @param sessionName
* name - the session name.
* @throws SdpException
* if the sessionName is null
*/
public void setSessionName(SessionName sessionName) throws SdpException {
if (sessionName == null)
throw new SdpException("The parameter is null");
if (sessionName instanceof SessionNameField) {
SessionNameField s = (SessionNameField) sessionName;
sessionNameImpl = s;
} else
throw new SdpException(
"The parameter must be an instance of SessionNameField");
}
/**
* Returns value of the info field (i=) of this object.
*
* @return info
*/
public Info getInfo() {
return infoImpl;
}
/**
* Sets the i= field of this object.
*
* @param i
* s - new i= value; if null removes the field
* @throws SdpException
* if the info is null
*/
public void setInfo(Info i) throws SdpException {
if (i == null)
throw new SdpException("The parameter is null");
if (i instanceof InformationField) {
InformationField info = (InformationField) i;
infoImpl = info;
} else
throw new SdpException(
"The parameter must be an instance of InformationField");
}
/**
* Returns a uri to the location of more details about the session. This
* corresponds to the u= field of the SDP data.
*
* @return the uri.
*/
public URI getURI() {
return uriImpl;
}
/**
* Sets the uri to the location of more details about the session. This
* corresponds to the u= field of the SDP data.
*
* @param uri
* uri - the uri.
* @throws SdpException
* if the uri is null
*/
public void setURI(URI uri) throws SdpException {
if (uri == null)
throw new SdpException("The parameter is null");
if (uri instanceof URIField) {
URIField u = (URIField) uri;
uriImpl = u;
} else
throw new SdpException(
"The parameter must be an instance of URIField");
}
/**
* Returns an email address to contact for further information about the
* session. This corresponds to the e= field of the SDP data.
*
* @param create
* boolean to set
* @throws SdpParseException
* @return the email address.
*/
public Vector getEmails(boolean create) throws SdpParseException {
if (emailList == null) {
if (create)
emailList = new Vector();
}
return emailList;
}
/**
* Sets a an email address to contact for further information about the
* session. This corresponds to the e= field of the SDP data.
*
* @param emails
* email - the email address.
* @throws SdpException
* if the vector is null
*/
public void setEmails(Vector emails) throws SdpException {
if (emails == null)
throw new SdpException("The parameter is null");
else
emailList = emails;
}
/**
* Returns a phone number to contact for further information about the
* session. This corresponds to the p= field of the SDP data.
*
* @param create
* boolean to set
* @throws SdpException
* @return the phone number.
*/
public Vector getPhones(boolean create) throws SdpException {
if (phoneList == null) {
if (create)
phoneList = new Vector();
}
return phoneList;
}
/**
* Sets a phone number to contact for further information about the session.
* This corresponds to the p= field of the SDP data.
*
* @param phones
* phone - the phone number.
* @throws SdpException
* if the vector is null
*/
public void setPhones(Vector phones) throws SdpException {
if (phones == null)
throw new SdpException("The parameter is null");
else
phoneList = phones;
}
/**
* Returns a TimeField indicating the start, stop, repetition and time zone
* information of the session. This corresponds to the t= field of the SDP
* data.
*
* @param create
* boolean to set
* @throws SdpException
* @return the Time Field.
*/
public Vector getTimeDescriptions(boolean create) throws SdpException {
if (timeDescriptions == null) {
if (create)
timeDescriptions = new Vector();
}
return timeDescriptions;
}
/**
* Sets a TimeField indicating the start, stop, repetition and time zone
* information of the session. This corresponds to the t= field of the SDP
* data.
*
* @param times
* time - the TimeField.
* @throws SdpException
* if the vector is null
*/
public void setTimeDescriptions(Vector times) throws SdpException {
if (times == null)
throw new SdpException("The parameter is null");
else {
timeDescriptions = times;
}
}
/**
* Returns the time zone adjustments for the Session
*
* @param create
* boolean to set
* @throws SdpException
* @return a Hashtable containing the zone adjustments, where the key is the
* Adjusted Time Zone and the value is the offset.
*/
public Vector getZoneAdjustments(boolean create) throws SdpException {
if (zoneAdjustments == null) {
if (create)
zoneAdjustments = new Vector();
}
return zoneAdjustments;
}
/**
* Sets the time zone adjustment for the TimeField.
*
* @param zoneAdjustments
* zoneAdjustments - a Hashtable containing the zone adjustments,
* where the key is the Adjusted Time Zone and the value is the
* offset.
* @throws SdpException
* if the vector is null
*/
public void setZoneAdjustments(Vector zoneAdjustments) throws SdpException {
if (zoneAdjustments == null)
throw new SdpException("The parameter is null");
else
this.zoneAdjustments = zoneAdjustments;
}
/**
* Returns the connection information associated with this object. This may
* be null for SessionDescriptions if all Media objects have a connection
* object and may be null for Media objects if the corresponding session
* connection is non-null.
*
* @return connection
*/
public Connection getConnection() {
return connectionImpl;
}
/**
* Set the connection data for this entity.
*
* @param conn
* to set
* @throws SdpException
* if the parameter is null
*/
public void setConnection(Connection conn) throws SdpException {
if (conn == null)
throw new SdpException("The parameter is null");
if (conn instanceof ConnectionField) {
ConnectionField c = (ConnectionField) conn;
connectionImpl = c;
} else
throw new SdpException("Bad implementation class ConnectionField");
}
/**
* Returns the Bandwidth of the specified type.
*
* @param create
* type - type of the Bandwidth to return
* @return the Bandwidth or null if undefined
*/
public Vector getBandwidths(boolean create) {
if (bandwidthList == null) {
if (create)
bandwidthList = new Vector();
}
return bandwidthList;
}
/**
* set the value of the Bandwidth with the specified type.
*
* @param bandwidthList
* to set
* @throws SdpException
* if the vector is null
*/
public void setBandwidths(Vector bandwidthList) throws SdpException {
if (bandwidthList == null)
throw new SdpException("The parameter is null");
else
this.bandwidthList = bandwidthList;
}
/**
* Returns the integer value of the specified bandwidth name.
*
* @param name
* name - the name of the bandwidth type
* @throws SdpParseException
* @return the value of the named bandwidth
*/
public int getBandwidth(String name) throws SdpParseException {
if (name == null)
return -1;
else if (bandwidthList == null)
return -1;
for (int i = 0; i < bandwidthList.size(); i++) {
Object o = bandwidthList.elementAt(i);
if (o instanceof BandwidthField) {
BandwidthField b = (BandwidthField) o;
String type = b.getType();
if (type != null) {
if (name.equals(type)) {
return b.getValue();
}
}
}
}
return -1;
}
/**
* Sets the value of the specified bandwidth type.
*
* @param name
* name - the name of the bandwidth type.
* @param value
* value - the value of the named bandwidth type.
* @throws SdpException
* if the name is null
*/
public void setBandwidth(String name, int value) throws SdpException {
if (name == null)
throw new SdpException("The parameter is null");
else if (bandwidthList != null) {
for (int i = 0; i < bandwidthList.size(); i++) {
Object o = bandwidthList.elementAt(i);
if (o instanceof BandwidthField) {
BandwidthField b = (BandwidthField) o;
String type = b.getType();
if (type != null) {
if (name.equals(type)) {
b.setValue(value);
}
}
}
}
}
}
/**
* Removes the specified bandwidth type.
*
* @param name
* name - the name of the bandwidth type
*/
public void removeBandwidth(String name) {
if (name != null)
if (bandwidthList != null) {
for (int i = 0; i < bandwidthList.size(); i++) {
Object o = bandwidthList.elementAt(i);
if (o instanceof BandwidthField) {
BandwidthField b = (BandwidthField) o;
try {
String type = b.getType();
if (type != null) {
if (name.equals(type)) {
bandwidthList.remove(b);
}
}
} catch (SdpParseException e) {
}
}
}
}
}
/**
* Returns the key data.
*
* @return key
*/
public Key getKey() {
return keyImpl;
}
/**
* Sets encryption key information. This consists of a method and an
* encryption key included inline.
*
* @param key
* key - the encryption key data; depending on method may be null
* @throws SdpException
* if the parameter is null
*/
public void setKey(Key key) throws SdpException {
if (key == null)
throw new SdpException("The parameter is null");
if (key instanceof KeyField) {
KeyField k = (KeyField) key;
keyImpl = k;
} else
throw new SdpException(
"The parameter must be an instance of KeyField");
}
/**
* Returns the value of the specified attribute.
*
* @param name
* name - the name of the attribute
* @throws SdpParseException
* @return the value of the named attribute
*/
public String getAttribute(String name) throws SdpParseException {
if (name == null)
return null;
else if (attributesList == null)
return null;
for (int i = 0; i < attributesList.size(); i++) {
Object o = attributesList.elementAt(i);
if (o instanceof AttributeField) {
AttributeField a = (AttributeField) o;
String n = a.getName();
if (n != null) {
if (name.equals(n)) {
return a.getValue();
}
}
}
}
return null;
}
/**
* Returns the set of attributes for this Description as a Vector of
* Attribute objects in the order they were parsed.
*
* @param create
* create - specifies whether to return null or a new empty
* Vector in case no attributes exists for this Description
* @return attributes for this Description
*/
public Vector getAttributes(boolean create) {
if (attributesList == null) {
if (create)
attributesList = new Vector();
}
return attributesList;
}
/**
* Removes the attribute specified by the value parameter.
*
* @param name
* name - the name of the attribute
*/
public void removeAttribute(String name) {
if (name != null)
if (attributesList != null) {
for (int i = 0; i < attributesList.size(); i++) {
Object o = attributesList.elementAt(i);
if (o instanceof AttributeField) {
AttributeField a = (AttributeField) o;
try {
String n = a.getName();
if (n != null) {
if (name.equals(n)) {
attributesList.remove(a);
}
}
} catch (SdpParseException e) {
}
}
}
}
}
/**
* Sets the value of the specified attribute.
*
* @param name
* name - the name of the attribute.
* @param value
* value - the value of the named attribute.
* @throws SdpException
* if the name or the value is null
*/
public void setAttribute(String name, String value) throws SdpException {
if (name == null || value == null)
throw new SdpException("The parameter is null");
else if (attributesList != null) {
for (int i = 0; i < attributesList.size(); i++) {
Object o = attributesList.elementAt(i);
if (o instanceof AttributeField) {
AttributeField a = (AttributeField) o;
String n = a.getName();
if (n != null) {
if (name.equals(n)) {
a.setValue(value);
}
}
}
}
}
}
/**
* Adds the specified Attribute to this Description object.
*
* @param attributes - the attribute to add
* @throws SdpException
* if the vector is null
*/
public void setAttributes(Vector attributes) throws SdpException {
if (attributes == null)
throw new SdpException("The parameter is null");
else
attributesList = attributes;
}
/**
* Adds a MediaDescription to the session description. These correspond to
* the m= fields of the SDP data.
*
* @param create
* boolean to set
* @throws SdpException
* @return media - the field to add.
*/
public Vector getMediaDescriptions(boolean create) throws SdpException {
if (mediaDescriptions == null) {
if (create)
mediaDescriptions = new Vector();
}
return mediaDescriptions;
}
/**
* Removes all MediaDescriptions from the session description.
*
* @param mediaDescriptions
* to set
* @throws SdpException
* if the parameter is null
*/
public void setMediaDescriptions(Vector mediaDescriptions)
throws SdpException {
if (mediaDescriptions == null)
throw new SdpException("The parameter is null");
else
this.mediaDescriptions = mediaDescriptions;
}
private String encodeVector(Vector vector) {
StringBuilder encBuff = new StringBuilder();
for (int i = 0; i < vector.size(); i++)
encBuff.append(vector.elementAt(i));
return encBuff.toString();
}
/**
* Returns the canonical string representation of the current
* SessionDescrption. Acknowledgement - this code was contributed by Emil
* Ivov.
*
* @return Returns the canonical string representation of the current
* SessionDescrption.
*/
public String toString() {
StringBuilder encBuff = new StringBuilder();
// Encode single attributes
encBuff.append(getVersion() == null ? "" : getVersion().toString());
encBuff.append(getOrigin() == null ? "" : getOrigin().toString());
encBuff.append(getSessionName() == null ? "" : getSessionName()
.toString());
encBuff.append(getInfo() == null ? "" : getInfo().toString());
// Encode attribute vectors
try {
encBuff.append(getURI() == null ? "" : getURI().toString());
encBuff.append(getEmails(false) == null ? ""
: encodeVector(getEmails(false)));
encBuff.append(getPhones(false) == null ? ""
: encodeVector(getPhones(false)));
encBuff.append(getConnection() == null ? "" : getConnection()
.toString());
encBuff.append(getBandwidths(false) == null ? ""
: encodeVector(getBandwidths(false)));
encBuff.append(getTimeDescriptions(false) == null ? ""
: encodeVector(getTimeDescriptions(false)));
encBuff.append(getZoneAdjustments(false) == null ? ""
: encodeVector(getZoneAdjustments(false)));
encBuff.append(getKey() == null ? "" : getKey().toString());
encBuff.append(getAttributes(false) == null ? ""
: encodeVector(getAttributes(false)));
encBuff.append(getMediaDescriptions(false) == null ? ""
: encodeVector(getMediaDescriptions(false)));
// adds the final crlf
} catch (SdpException exc) {
// add exception handling if necessary
}
return encBuff.toString();
}
}