/*
* 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.dtls.attributes.parser;
import java.util.regex.Pattern;
import org.restcomm.media.sdp.SdpException;
import org.restcomm.media.sdp.SdpParser;
import org.restcomm.media.sdp.dtls.attributes.FingerprintAttribute;
import org.restcomm.media.sdp.fields.AttributeField;
/**
* Parses SDP text to construct {@link FingerprintAttribute} objects.
*
* @author Henrique Rosa (henrique.rosa@telestax.com)
*
*/
public class FingerprintAttributeParser implements SdpParser<FingerprintAttribute> {
private static final String REGEX = "^a=fingerprint:\\S+\\s(\\w+(:\\w+)+)$";
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 FingerprintAttribute parse(String sdp) throws SdpException {
try {
int separator = sdp.indexOf(AttributeField.ATTRIBUTE_SEPARATOR);
if(separator == -1) {
throw new IllegalArgumentException("No value found");
}
String[] values = sdp.trim().substring(separator + 1).split(" ");
String hashFunction = values[0];
String fingerprint = values[1];
return new FingerprintAttribute(hashFunction, fingerprint);
} catch (Exception e) {
throw new SdpException(PARSE_ERROR + sdp, e);
}
}
@Override
public void parse(FingerprintAttribute field, String sdp) throws SdpException {
try {
int separator = sdp.indexOf(AttributeField.ATTRIBUTE_SEPARATOR);
if(separator == -1) {
throw new IllegalArgumentException("No value found");
}
String[] values = sdp.trim().substring(separator + 1).split(" ");
String hashFunction = values[0];
String fingerprint = values[1];
field.setHashFunction(hashFunction);
field.setFingerprint(fingerprint);
} catch (Exception e) {
throw new SdpException(PARSE_ERROR + sdp, e);
}
}
}