/**
* parse the String message
*
* @return SIPHeader (RequireList object)
* @throws SIPParseException if the message does not respect the spec.
*/
public SIPHeader parse() throws ParseException {
RequireList requireList = new RequireList();
if (debug) dbg_enter("RequireParser.parse");
try {
headerName(TokenTypes.REQUIRE);
while (lexer.lookAhead(0) != '\n') {
Require r = new Require();
r.setHeaderName(SIPHeaderNames.REQUIRE);
// Parsing the option tag
this.lexer.match(TokenTypes.ID);
Token token = lexer.getNextToken();
r.setOptionTag(token.getTokenValue());
this.lexer.SPorHT();
requireList.add(r);
while (lexer.lookAhead(0) == ',') {
this.lexer.match(',');
this.lexer.SPorHT();
r = new Require();
// Parsing the option tag
this.lexer.match(TokenTypes.ID);
token = lexer.getNextToken();
r.setOptionTag(token.getTokenValue());
this.lexer.SPorHT();
requireList.add(r);
}
}
} finally {
if (debug) dbg_leave("RequireParser.parse");
}
return requireList;
}
