/*
* TeleStax, Open Source Cloud Communications
* Copyright 2011-2014, Telestax Inc and individual contributors
* by the @authors tag.
*
* This program is free software: you can redistribute it and/or modify
* under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation; either version 3 of
* the License, or (at your option) any later version.
*
* 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
package org.restcomm.media.sdp.rtcp.attributes.parser;
import java.util.regex.Pattern;
import org.restcomm.media.sdp.SdpException;
import org.restcomm.media.sdp.SdpParser;
import org.restcomm.media.sdp.fields.AttributeField;
import org.restcomm.media.sdp.rtcp.attributes.RtcpAttribute;
/**
* Parses SDP text to construct {@link RtcpAttribute} objects.
*
* @author Henrique Rosa (henrique.rosa@telestax.com)
*
*/
public class RtcpAttributeParser implements SdpParser<RtcpAttribute> {
// TODO use appropriate IP pattern instead of [0-9\\.]+
private static final String REGEX = "^a=rtcp:\\d+(\\s\\w+\\s\\w+\\s[0-9\\.]+)?$";
private static final Pattern PATTERN = Pattern.compile(REGEX);
@Override
public boolean canParse(String sdp) {
if(sdp == null || sdp.isEmpty()) {
return false;
}
return PATTERN.matcher(sdp.trim()).matches();
}
@Override
public RtcpAttribute parse(String sdp) throws SdpException {
try {
// Gather values from SDP
int separator = sdp.indexOf(AttributeField.ATTRIBUTE_SEPARATOR);
if(separator == -1) {
throw new IllegalArgumentException("No value found");
}
String[] values = sdp.trim().substring(separator + 1).split(" ");
// Parse mandatory values
int port = Integer.parseInt(values[0]);
// Parse optional values if available
if(values.length > 1) {
String netType= values[1];
String addressType = values[2];
String address = values[3];
return new RtcpAttribute(port, netType, addressType, address);
}
return new RtcpAttribute(port);
} catch (Exception e) {
throw new SdpException(PARSE_ERROR + sdp, e);
}
}
@Override
public void parse(RtcpAttribute field, String sdp) throws SdpException {
try {
// Gather values from SDP
int separator = sdp.indexOf(AttributeField.ATTRIBUTE_SEPARATOR);
if(separator == -1) {
throw new IllegalArgumentException("No value found");
}
String[] values = sdp.trim().substring(separator + 1).split(" ");
// Parse mandatory values
int port = Integer.parseInt(values[0]);
String netType= null;
String addressType = null;
String address = null;
// Parse optional values if available
if(values.length > 1) {
netType= values[1];
addressType = values[2];
address = values[3];
}
// Persist parsed values
field.setPort(port);
field.setNetworkType(netType);
field.setAddressType(addressType);
field.setAddress(address);
} catch (Exception e) {
throw new SdpException(PARSE_ERROR + sdp, e);
}
}
}