gov.nist.javax.sdp.MediaDescriptionImpl Maven / Gradle / Ivy
/*
* 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
*
* .
*
*/
package android.gov.nist.javax.sdp;
import android.javax.sdp.*;
import android.gov.nist.javax.sdp.fields.*;
import java.util.*;
import android.gov.nist.core.*;
/*
* Includes code contributed by
* Miguel Freitas (IT) PTInovacao -- modifications for IMS.
*/
/**
* Fieldementation of Media Description interface.
*
* @version JSR141-PUBLIC-REVIEW (subject to change).
*
* @author Olivier Deruelle
* @author M. Ranganathan
*
*
*/
public class MediaDescriptionImpl implements android.javax.sdp.MediaDescription {
protected MediaField mediaField;
protected InformationField informationField;
protected ConnectionField connectionField;
protected Vector bandwidthFields;
protected KeyField keyField;
protected Vector attributeFields;
/**
* Encode to a canonical form.
*
* @since v1.0
*/
public String encode() {
StringBuilder retval = new StringBuilder();
if (mediaField != null)
retval.append(mediaField.encode());
if (informationField != null)
retval.append(informationField.encode());
if (connectionField != null)
retval.append(connectionField.encode());
if (bandwidthFields != null) {
for (int i = 0; i < bandwidthFields.size(); i++) {
// issued by Miguel Freitas (IT) PTInovacao
retval.append(((SDPField) bandwidthFields.elementAt(i))
.encode());
/*
* original code BandwidthField bandwidthField =
* (BandwidthField) bandwidthFields.elementAt(i);
* retval.append(bandwidthField.encode());
*/
// end //
}
if (preconditionFields != null) {
int precondSize = preconditionFields.getPreconditionSize();
for (int i = 0; i < precondSize; i++) {
retval.append(((SDPField) preconditionFields
.getPreconditions().elementAt(i)).encode());
}
}
}
if (keyField != null)
retval.append(keyField.encode());
if (attributeFields != null) {
for (int i = 0; i < attributeFields.size(); i++)
retval.append(((SDPField) attributeFields.elementAt(i))
.encode());
}
return retval.toString();
}
public String toString() {
return this.encode();
}
public MediaDescriptionImpl() {
this.bandwidthFields = new Vector();
this.attributeFields = new Vector();
// issued by Miguel Freitas (AV) PTInovacao
this.preconditionFields = new PreconditionFields();
}
public MediaField getMediaField() {
return mediaField;
}
public InformationField getInformationField() {
return informationField;
}
public ConnectionField getConnectionField() {
return connectionField;
}
public KeyField getKeyField() {
return keyField;
}
public Vector getAttributeFields() {
return attributeFields;
}
/**
* Set the mediaField member
*/
public void setMediaField(MediaField m) {
mediaField = m;
}
/**
* Set the informationField member
*/
public void setInformationField(InformationField i) {
informationField = i;
}
/**
* Set the connectionField member
*/
public void setConnectionField(ConnectionField c) {
connectionField = c;
}
/**
* Set the bandwidthField member
*/
public void addBandwidthField(BandwidthField b) {
bandwidthFields.add(b);
}
/**
* Set the keyField member
*/
public void setKeyField(KeyField k) {
keyField = k;
}
/**
* Set the attributeFields member
*/
public void setAttributeFields(Vector a) {
attributeFields = a;
}
/**
* Return the Media field of the description.
*
* @return the Media field of the description.
*/
public Media getMedia() {
return mediaField;
}
// issued by Miguel Freitas //
public void addAttribute(AttributeField af) {
// protected void addAttribute(AttributeField af) {
// end //
this.attributeFields.add(af);
}
protected boolean hasAttribute(String name) {
for (int i = 0; i < this.attributeFields.size(); i++) {
AttributeField af = (AttributeField) this.attributeFields
.elementAt(i);
if (af.getAttribute().getName().equals(name))
return true;
}
return false;
}
/**
* Set the Media field of the description.
*
* @param media
* to set
* @throws SdpException
* if the media field is null
*/
public void setMedia(Media media) throws SdpException {
if (media == null)
throw new SdpException("The media is null");
if (media instanceof MediaField) {
mediaField = (MediaField) media;
} else
throw new SdpException("A mediaField parameter is required");
}
/**
* Returns value of the info field (i=) of this object.
*
* @return value of the info field (i=) of this object.
*/
public Info getInfo() {
InformationField informationField = getInformationField();
if (informationField == null)
return null;
else {
return informationField;
}
}
/**
* Sets the i= field of this object.
*
* @param i
* to set
* @throws SdpException
* if the info is null
*/
public void setInfo(Info i) throws SdpException {
if (i == null)
throw new SdpException("The info is null");
if (i instanceof InformationField) {
this.informationField = (InformationField) i;
} else
throw new SdpException("A informationField parameter is required");
}
/**
* 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 connectionField;
}
/**
* Set the connection data for this entity
*
* @param conn
* to set
* @throws SdpException
* if the connexion is null
*/
public void setConnection(Connection conn) throws SdpException {
if (conn == null)
throw new SdpException("The conn is null");
if (conn instanceof ConnectionField) {
connectionField = (ConnectionField) conn;
} else
throw new SdpException("bad implementation");
}
/**
* Returns the Bandwidth of the specified type.
*
* @param create
* type of the Bandwidth to return
* @return the Bandwidth or null if undefined
*/
public Vector getBandwidths(boolean create) {
return bandwidthFields;
}
/**
* set the value of the Bandwidth with the specified type
*
* @param bandwidths
* type of the Bandwidth object whose value is requested
* @throws SdpException
* if vector is null
*/
public void setBandwidths(Vector bandwidths) throws SdpException {
if (bandwidths == null)
throw new SdpException("The vector bandwidths is null");
this.bandwidthFields = bandwidths;
}
/**
* Returns the integer value of the specified bandwidth name.
*
* @param 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)
throw new NullPointerException("null parameter");
if (bandwidthFields == null)
return -1;
else {
for (int i = 0; i < bandwidthFields.size(); i++) {
BandwidthField bandwidthField = (BandwidthField) bandwidthFields
.elementAt(i);
String type = bandwidthField.getBwtype();
if (type != null && type.equals(name))
return bandwidthField.getBandwidth();
}
return -1;
}
}
/**
* Sets the value of the specified bandwidth type.
*
* @param name
* the name of the bandwidth type.
* @param 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 name is null");
else {
int i = 0; // issued by Miguel Freitas (IT) PTInovacao
for (i = 0; i < bandwidthFields.size(); i++) {
BandwidthField bandwidthField = (BandwidthField) this.bandwidthFields
.elementAt(i);
String type = bandwidthField.getBwtype();
if (type != null && type.equals(name)) {
bandwidthField.setBandwidth(value);
break; // issued by Miguel Freitas (IT) PTInovacao
}
}
// issued by Miguel Freitas (IT) PTInovacao
if (i == this.bandwidthFields.size()) {
BandwidthField bandwidthField = new BandwidthField();
bandwidthField.setType(name);
bandwidthField.setValue(value);
this.bandwidthFields.add(bandwidthField);
}
// end //
}
}
/**
* Removes the specified bandwidth type.
*
* @param name
* the name of the bandwidth type.
*/
public void removeBandwidth(String name) {
if (name == null) {
throw new NullPointerException("null bandwidth type");
} else {
int i = 0;
for (i = 0; i < bandwidthFields.size(); i++) {
BandwidthField bandwidthField = (BandwidthField) bandwidthFields
.elementAt(i);
String type = bandwidthField.getBwtype();
if (type != null && type.equals(name))
break;
}
if (i < bandwidthFields.size())
bandwidthFields.removeElementAt(i);
}
}
/**
* Returns the key data.
*
* @return the key data.
*/
public Key getKey() {
if (keyField == null)
return null;
else {
return keyField;
}
}
/**
* Sets encryption key information. This consists of a method and an
* encryption key included inline.
*
* @param key
* the encryption key data; depending on method may be null
* @throws SdpException
* if the key is null
*/
public void setKey(Key key) throws SdpException {
if (key == null)
throw new SdpException("The key is null");
if (key instanceof KeyField) {
KeyField keyField = (KeyField) key;
setKeyField(keyField);
} else
throw new SdpException("A keyField parameter is required");
}
/**
* Returns the set of attributes for this Description as a Vector of
* Attribute objects in the order they were parsed.
*
* @param 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) {
return attributeFields;
}
/**
* Adds the specified Attribute to this Description object.
*
* @param attributes --
* the attribute to add
* @throws SdpException --
* if the attributes is null
*/
public void setAttributes(Vector attributes) throws SdpException {
this.attributeFields = attributes;
}
/**
* Returns the value of the specified attribute.
*
* @param 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) {
for (int i = 0; i < this.attributeFields.size(); i++) {
AttributeField af = (AttributeField) this.attributeFields
.elementAt(i);
if (name.equals(af.getAttribute().getName()))
return (String) af.getAttribute().getValueAsObject();
}
return null;
} else
throw new NullPointerException("null arg!");
}
/**
* Sets the value of the specified attribute
*
* @param name
* the name of the attribute.
* @param value
* the value of the named attribute.
* @throws SdpException
* if the parameters are null
*/
public void setAttribute(String name, String value) throws SdpException {
if (name == null)
throw new SdpException("The parameters are null");
else {
int i = 0;
for (i = 0; i < this.attributeFields.size(); i++) {
AttributeField af = (AttributeField) this.attributeFields
.elementAt(i);
if (af.getAttribute().getName().equals(name)) {
NameValue nv = af.getAttribute();
nv.setValueAsObject(value);
break;
}
}
if (i == this.attributeFields.size()) {
AttributeField af = new AttributeField();
NameValue nv = new NameValue(name, value);
af.setAttribute(nv);
// Bug fix by Emil Ivov.
this.attributeFields.add(af);
}
}
}
public String getDuplexity() {
int i = 0;
for (i = 0; i < this.attributeFields.size(); i++) {
AttributeField af = (AttributeField) this.attributeFields
.elementAt(i);
if (af.getAttribute().getName().equalsIgnoreCase("sendrecv") ||
af.getAttribute().getName().equalsIgnoreCase("recvonly") ||
af.getAttribute().getName().equalsIgnoreCase("sendonly") ||
af.getAttribute().getName().equalsIgnoreCase("inactive")) {
return af.getAttribute().getName();
}
}
return null;
}
public void setDuplexity(String duplexity) {
if ( duplexity == null ) throw new NullPointerException("Null arg");
int i = 0;
for (i = 0; i < this.attributeFields.size(); i++) {
AttributeField af = (AttributeField) this.attributeFields
.elementAt(i);
if (af.getAttribute().getName().equalsIgnoreCase("sendrecv") ||
af.getAttribute().getName().equalsIgnoreCase("recvonly") ||
af.getAttribute().getName().equalsIgnoreCase("sendonly") ||
af.getAttribute().getName().equalsIgnoreCase("inactive")) {
NameValue nv = new NameValue(duplexity, null);
af.setAttribute(nv);
return;
}
}
if (i == this.attributeFields.size()) {
AttributeField af = new AttributeField();
NameValue nv = new NameValue(duplexity, null);
af.setAttribute(nv);
// Bug fix by Emil Ivov.
this.attributeFields.add(af);
}
}
/**
* Removes the attribute specified by the value parameter.
*
* @param name
* the name of the attribute.
*/
public void removeAttribute(String name) {
if (name == null)
throw new NullPointerException("null arg!");
if (name != null) {
int i = 0;
for (i = 0; i < this.attributeFields.size(); i++) {
AttributeField af = (AttributeField) this.attributeFields
.elementAt(i);
if (af.getAttribute().getName().equals(name))
break;
}
if (i < attributeFields.size())
attributeFields.removeElementAt(i);
}
}
/**
* Returns a Vector containing a string indicating the MIME type for each of
* the codecs in this description.
*
* A MIME value is computed for each codec in the media description.
*
* The MIME type is computed in the following fashion: The type is the
* mediaType from the media field. The subType is determined by the
* protocol.
*
* The result is computed as the string of the form:
*
* type + '/' + subType
*
* The subType portion is computed in the following fashion. RTP/AVP the
* subType is returned as the codec name. This will either be extracted from
* the rtpmap attribute or computed. other the protocol is returned as the
* subType.
*
* If the protocol is RTP/AVP and the rtpmap attribute for a codec is
* absent, then the codec name will be computed in the following fashion.
* String indexed in table SdpConstants.avpTypeNames if the value is an int
* greater than or equal to 0 and less than AVP_DEFINED_STATIC_MAX, and has
* been assigned a value. SdpConstant.RESERVED if the value is an int
* greater than or equal to 0 and less than AVP_DEFINED_STATIC_MAX, and has
* not been assigned a value. SdpConstant.UNASSIGNED An int greater than or
* equal to AVP_DEFINED_STATIC_MAX and less than AVP_DYNAMIC_MIN - currently
* unassigned. SdpConstant.DYNAMIC Any int less than 0 or greater than or
* equal to AVP_DYNAMIC_MIN
*
* @throws SdpException
* if there is a problem extracting the parameters.
* @return a Vector containing a string indicating the MIME type for each of
* the codecs in this description
*/
public Vector getMimeTypes() throws SdpException {
MediaField mediaField = (MediaField) getMedia();
String type = mediaField.getMediaType();
String protocol = mediaField.getProtocol();
Vector formats = mediaField.getMediaFormats(false);
Vector v = new Vector();
for (int i = 0; i < formats.size(); i++) {
String result = null;
if (protocol.equals("RTP/AVP")) {
if (getAttribute(SdpConstants.RTPMAP) != null)
result = type + "/" + protocol;
else {
}
} else
result = type + "/" + protocol;
v.addElement(result);
}
return v;
}
/**
* Returns a Vector containing a string of parameters for each of the codecs
* in this description.
*
* A parameter string is computed for each codec.
*
* The parameter string is computed in the following fashion.
*
* The rate is extracted from the rtpmap or static data.
*
* The number of channels is extracted from the rtpmap or static data.
*
* The ptime is extracted from the ptime attribute.
*
* The maxptime is extracted from the maxptime attribute.
*
* Any additional parameters are extracted from the ftmp attribute.
*
* @throws SdpException
* if there is a problem extracting the parameters.
* @return a Vector containing a string of parameters for each of the codecs
* in this description.
*/
public Vector getMimeParameters() throws SdpException {
String rate = getAttribute("rate");
String ptime = getAttribute("ptime");
String maxptime = getAttribute("maxptime");
String ftmp = getAttribute("ftmp");
Vector result = new Vector();
result.addElement(rate);
result.addElement(ptime);
result.addElement(maxptime);
result.addElement(ftmp);
return result;
}
/**
* Adds dynamic media types to the description.
*
* @param payloadNames
* a Vector of String - each one the name of a dynamic payload to
* be added (usually an integer larger than
* SdpConstants.AVP_DYNAMIC_MIN).
* @param payloadValues
* a Vector of String - each contains the value describing the
* correlated dynamic payloads to be added
* @throws SdpException
* if either vector is null or empty. if the vector sizes are
* unequal.
*/
public void addDynamicPayloads(Vector payloadNames, Vector payloadValues)
throws SdpException {
if (payloadNames == null || payloadValues == null)
throw new SdpException(" The vectors are null");
else {
if (payloadNames.isEmpty() || payloadValues.isEmpty())
throw new SdpException(" The vectors are empty");
else {
if (payloadNames.size() != payloadValues.size())
throw new SdpException(" The vector sizes are unequal");
else {
for (int i = 0; i < payloadNames.size(); i++) {
String name = (String) payloadNames.elementAt(i);
String value = (String) payloadValues.elementAt(i);
setAttribute(name, value);
}
}
}
}
}
// /////////////////////////////////////////////////////////////////
// Precondition Mechanism
// based in 3GPP TS 24.229 and precondition mechanism (RFC 3312)
// issued by Miguel Freitas (IT) PTinovacao
// /////////////////////////////////////////////////////////////////
/**
* Precondition Mechanism - precondition fields for the media description
*/
// Precondition Attribute Fields
protected PreconditionFields preconditionFields;
/**
*
* Set the Media Description's Precondition Fields
*
*
* issued by Miguel Freitas (IT) PTInovacao
*
*
* @param precondition
* Vector containing PreconditionFields
* @throws SdpException
*/
public void setPreconditionFields(Vector precondition) throws SdpException {
this.preconditionFields.setPreconditions(precondition);
}
/**
*
* Set the Media Description's Precondition Fields
*
*
* issued by Miguel Freitas (IT) PTInovacao
*
*
* @param precondition
* PreconditionFields parameter
*/
public void setPreconditions(PreconditionFields precondition) {
this.preconditionFields = precondition;
}
/**
*
* Get attribute fields of segmented precondition
*
*
* issued by Miguel Freitas (IT) PTInovacao
*
*
* @return Vector of attribute fields (segmented precondition)
*/
public Vector getPreconditionFields() {
return this.preconditionFields.getPreconditions();
}
// end //
}