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      1 // Copyright (c) 2004 Brian Wellington (bwelling (at) xbill.org)
      2 
      3 package org.xbill.DNS;
      4 
      5 import java.io.*;
      6 
      7 /**
      8  * The NULL Record.  This has no defined purpose, but can be used to
      9  * hold arbitrary data.
     10  *
     11  * @author Brian Wellington
     12  */
     13 
     14 public class NULLRecord extends Record {
     15 
     16 private static final long serialVersionUID = -5796493183235216538L;
     17 
     18 private byte [] data;
     19 
     20 NULLRecord() {}
     21 
     22 Record
     23 getObject() {
     24 	return new NULLRecord();
     25 }
     26 
     27 /**
     28  * Creates a NULL record from the given data.
     29  * @param data The contents of the record.
     30  */
     31 public
     32 NULLRecord(Name name, int dclass, long ttl, byte [] data) {
     33 	super(name, Type.NULL, dclass, ttl);
     34 
     35 	if (data.length > 0xFFFF) {
     36 		throw new IllegalArgumentException("data must be <65536 bytes");
     37 	}
     38 	this.data = data;
     39 }
     40 
     41 void
     42 rrFromWire(DNSInput in) throws IOException {
     43 	data = in.readByteArray();
     44 }
     45 
     46 void
     47 rdataFromString(Tokenizer st, Name origin) throws IOException {
     48 	throw st.exception("no defined text format for NULL records");
     49 }
     50 
     51 String
     52 rrToString() {
     53 	return unknownToString(data);
     54 }
     55 
     56 /** Returns the contents of this record. */
     57 public byte []
     58 getData() {
     59 	return data;
     60 }
     61 
     62 void
     63 rrToWire(DNSOutput out, Compression c, boolean canonical) {
     64 	out.writeByteArray(data);
     65 }
     66 
     67 }
     68