/** * Builds a new Record from its textual representation * * @param name The owner name of the record. * @param type The record's type. * @param dclass The record's class. * @param ttl The record's time to live. * @param st A tokenizer containing the textual representation of the rdata. * @param origin The default origin to be appended to relative domain names. * @return The new record * @throws IOException The text format was invalid. */ public static Record fromString( Name name, int type, int dclass, long ttl, Tokenizer st, Name origin) throws IOException { Record rec; if (!name.isAbsolute()) throw new RelativeNameException(name); Type.check(type); DClass.check(dclass); TTL.check(ttl); Tokenizer.Token t = st.get(); if (t.type == Tokenizer.IDENTIFIER && t.value.equals("\\#")) { int length = st.getUInt16(); byte[] data = st.getHex(); if (data == null) { data = new byte[0]; } if (length != data.length) throw st.exception("invalid unknown RR encoding: " + "length mismatch"); DNSInput in = new DNSInput(data); return newRecord(name, type, dclass, ttl, length, in); } st.unget(); rec = getEmptyRecord(name, type, dclass, ttl, true); rec.rdataFromString(st, origin); t = st.get(); if (t.type != Tokenizer.EOL && t.type != Tokenizer.EOF) { throw st.exception("unexpected tokens at end of record"); } return rec; }