/*
* 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.
*/
/*
* SessionDescriptionImpl.java
*
* Created on January 10, 2002, 3:11 PM
*/
package gov.nist.javax.sdp;
import java.util.*;
import gov.nist.javax.sdp.fields.*;
import gov.nist.core.*;
/**
* Implementation of the SessionDescription interface.
*
*
* a href="{@docRoot}/uncopyright.html">This code is in the public domain.</a>
*
*/
public class SessionDescriptionImpl {
/** Descriptive label for current time. */
private TimeDescriptionImpl currentTimeDescription;
/** Descriptive lavel for current media. */
private MediaDescriptionImpl currentMediaDescription;
/** Protocol version. */
protected ProtoVersionField versionImpl;
/** Session originator. */
protected OriginField originImpl;
/** Current session name. */
protected SessionNameField sessionNameImpl;
/** Descriptive session information. */
protected InformationField infoImpl;
/** Current URi. */
protected URIField uriImpl;
/** Current connection. */
protected ConnectionField connectionImpl;
/** Key field. */
protected KeyField keyImpl;
/** Vector of time descriptions. */
protected Vector timeDescriptions;
/** Vector of media types. */
protected Vector mediaDescriptions;
/** Vector of time zone adjustments. */
protected Vector zoneAdjustments;
/** Vector of email addresses. */
protected Vector emailList;
/** Vector of phone numbers. */
protected Vector phoneList;
/** Vector of bandwidths. */
protected Vector bandwidthList;
/** Vector of connection attributes. */
protected Vector attributesList;
/** Creates new SessionDescriptionImpl */
public SessionDescriptionImpl() {
zoneAdjustments = new Vector();
emailList = new Vector();
phoneList = new Vector();
bandwidthList = new Vector();
timeDescriptions = new Vector();
mediaDescriptions = new Vector();
attributesList = new Vector();
}
/**
* Adds a new SDP field.
* @param sdpField the new field to be processed
* @exception ParseException if a parsing error occurs.
*/
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) {
emailList.addElement(sdpField);
} else if (sdpField instanceof PhoneField) {
phoneList.addElement(sdpField);
} else if (sdpField instanceof TimeField) {
currentTimeDescription = new TimeDescriptionImpl
((TimeField)sdpField);
timeDescriptions.addElement(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) {
zoneAdjustments.addElement(sdpField);
} else if (sdpField instanceof BandwidthField) {
if (currentMediaDescription != null) {
currentMediaDescription.addBandwidthField
((BandwidthField) sdpField);
} else {
bandwidthList.addElement(sdpField);
}
} else if (sdpField instanceof AttributeField) {
if (currentMediaDescription != null) {
AttributeField af = (AttributeField) sdpField;
String s = af.getName();
currentMediaDescription.addAttribute
((AttributeField) sdpField);
} else {
attributesList.addElement(sdpField);
}
} else if (sdpField instanceof MediaField) {
currentMediaDescription = new MediaDescriptionImpl();
mediaDescriptions.addElement(currentMediaDescription);
currentMediaDescription.setMediaField((MediaField)sdpField);
}
} catch (SdpException ex) {
throw new ParseException(sdpField.encode(), 0);
}
}
/**
* Public clone declaration.
* @throws CloneNotSupportedException if clone method is not supported
* @return Object
*/
public Object clone() {
Class myClass = this.getClass();
SessionDescriptionImpl hi;
try {
hi = (SessionDescriptionImpl) myClass.newInstance();
} catch (InstantiationException ex) {
return null;
} catch (IllegalAccessException ex) {
return null;
}
hi.versionImpl = (ProtoVersionField) this.versionImpl.clone();
hi.originImpl = (OriginField) this.originImpl.clone();
hi.sessionNameImpl = (SessionNameField) this.sessionNameImpl.clone();
hi.infoImpl = (InformationField) this.infoImpl.clone();
hi.uriImpl = (URIField) this.uriImpl.clone();
hi.connectionImpl = (ConnectionField) this.connectionImpl.clone();
hi.keyImpl = (KeyField) this.keyImpl.clone();
hi.timeDescriptions = cloneVector(this.timeDescriptions);
hi.emailList = cloneVector(this.emailList);
hi.phoneList = cloneVector(this.phoneList);
hi.zoneAdjustments = cloneVector(this.zoneAdjustments);
hi.bandwidthList = cloneVector(this.bandwidthList);
hi.attributesList = cloneVector(this.attributesList);
hi.mediaDescriptions = cloneVector(this.mediaDescriptions);
return hi;
}
/**
* 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 ProtoVersionField 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(ProtoVersionField 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 OriginField 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(OriginField 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 SessionNameField 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(SessionNameField 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 InformationField 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(InformationField 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 URIField 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(URIField 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 SdpException
* @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 ConnectionField getConnection() {
return connectionImpl;
}
/**
* Sets the connection data for this entity.
* @param conn to set
* @throws SdpException if the parameter is null
*/
public void setConnection(ConnectionField 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;
}
/**
* Sets 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.removeElement(b);
}
}
}
catch (SdpParseException e) {}
}
}
}
}
/**
* Returns the key data.
* @return key
*/
public KeyField 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(KeyField 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.removeElement(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 attributes 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;
}
/**
* Returns an encoded string of vector contents.
* @param vector the objects to process
* @return encode string of vector contents
*/
private String encodeVector(Vector vector) {
StringBuffer encBuff = new StringBuffer();
for (int i = 0; i < vector.size(); i++)
encBuff.append(vector.elementAt(i));
return encBuff.toString();
}
/**
* Utility method for cloning a Vector
* Acknowledgement - this code was contributed by Sverker Abrahamsson.
* @param v the vector to be copied
* @return the cloned vector
*/
private Vector cloneVector(Vector v) {
Vector clone = new Vector(v.capacity());
int size = v.size();
for (int i = 0; i < size; i++) {
clone.setElementAt(v.elementAt(i), i);
}
return clone;
}
/**
* Returns the canonical string representation of the
* current SessionDescrption. Acknowledgement - this code
*
* @return Returns the canonical string representation
* of the current SessionDescrption.
*/
public String toString() {
StringBuffer encBuff = new StringBuffer();
// 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(encodeVector(getEmails(true)));
encBuff.append(encodeVector(getPhones(true)));
encBuff.append(getConnection() == null ? "" :
getConnection().toString
());
encBuff.append(encodeVector(getBandwidths(true)));
encBuff.append(encodeVector(getTimeDescriptions(true)));
encBuff.append(encodeVector(getZoneAdjustments(true)));
encBuff.append(getKey() == null ? "" : getKey().toString());
encBuff.append(encodeVector(getAttributes(true)));
encBuff.append(encodeVector(getMediaDescriptions(true)));
// adds the final crlf
}
catch (SdpException exc) {
// add exception handling if necessary
}
return encBuff.toString();
}
}
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