opendap/src/main/java/opendap/servers/parsers/CeParser.java
boolean parse(String constraint) throws ParseException
    {
	((Celex)yylexer).reset(parsestate,constraint);
	return parse();
    }
boolean parse(String constraint) throws ParseException
    {
	((Celex)yylexer).reset(parsestate,constraint);
	return parse();
    }
/* the parse function allows the specification of a
new stream in case one is reusing the parser