Invokes parser for the request line.
if (debug) dbg_enter("parse");
try {
RequestLine retval = new RequestLine();
String m = method();
lexer.SPorHT();
retval.setMethod(m);
this.lexer.selectLexer("sip_urlLexer");
URLParser urlParser = new URLParser(this.getLexer());
URI url = urlParser.uriReference();
lexer.SPorHT();
retval.setUri(url);
this.lexer.selectLexer("request_lineLexer");
String v = sipVersion();
retval.setSipVersion(v);
lexer.SPorHT();
lexer.match('\n");
return retval;
} finally {
if (debug) dbg_leave("parse");
}