/*
* 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 gov.nist.javax.sip.parser;
import gov.nist.javax.sip.address.AddressImpl;
import gov.nist.javax.sip.address.SipUri;
import gov.nist.javax.sip.header.Contact;
import gov.nist.javax.sip.header.ContactList;
import gov.nist.javax.sip.header.SIPHeader;
import javax.sip.address.URI;
import java.text.ParseException;
import java.util.HashSet;
import java.util.Iterator;
/**
* A parser for The SIP contact header.
*
* @version 1.2 $Revision: 1.11 $ $Date: 2007/02/06 16:40:02 $
* @since 1.1
*/
public class ContactParser extends AddressParametersParser {
public ContactParser(String contact) {
super(contact);
}
protected ContactParser(Lexer lexer) {
super(lexer);
this.lexer = lexer;
}
public SIPHeader parse() throws ParseException {
// past the header name and the colon.
headerName(TokenTypes.CONTACT);
ContactList retval = new ContactList();
while (true) {
Contact contact = new Contact();
if (lexer.lookAhead(0) == '*') {
final char next = lexer.lookAhead(1);
if (next == ' ' || next == '\t' || next == '\r' || next == '\n') {
this.lexer.match('*');
contact.setWildCardFlag(true);
} else {
super.parse(contact);
}
} else {
super.parse(contact);
}
AddressImpl address = (AddressImpl) contact.getAddress();
URI uri = contact.getAddress().getURI();
/*
* When the header field value contains a display name, the URI
* including all URI parameters is enclosed in "<" and ">". If no "<"
* and ">" are present, all parameters after the URI are header
* parameters, not URI parameters.
*/
if (address.getAddressType() == AddressImpl.ADDRESS_SPEC
&& uri instanceof SipUri) {
SipUri sipUri = (SipUri) uri;
HashSet parameterNames = new HashSet();
for (Iterator it = sipUri.getParameterNames(); it.hasNext(); ) {
parameterNames.add(it.next());
}
// This avoids the concurrent modification exception.
for (Iterator it = parameterNames.iterator(); it.hasNext();) {
String name = (String) it.next();
String val = sipUri.getParameter(name);
sipUri.removeParameter(name);
contact.setParameter(name,val);
}
}
retval.add(contact);
this.lexer.SPorHT();
char la = lexer.lookAhead(0);
if (la == ',') {
this.lexer.match(',');
this.lexer.SPorHT();
} else if (la == '\n' || la == '\0')
break;
else
throw createParseException("unexpected char");
}
return retval;
}
}