nullrecord.java

来自「linux下建立JAVA虚拟机的源码KAFFE」· Java 代码 · 共 66 行

// Copyright (c) 2004 Brian Wellington ([e-mail])

package org.xbill.DNS;

import java.io.*;

/**
 * The NULL Record.  This has no defined purpose, but can be used to
 * hold arbitrary data.
 *
 * @author Brian Wellington
 */

public class NULLRecord extends Record {

private byte [] data;

NULLRecord() {}

Record
getObject() {
	return new NULLRecord();
}

/**
 * Creates a NULL record from the given data.
 * @param data The contents of the record.
 */
public
NULLRecord(Name name, int dclass, long ttl, byte [] data) {
	super(name, Type.NULL, dclass, ttl);

	if (data.length > 0xFFFF) {
		throw new IllegalArgumentException("data must be <65536 bytes");
	}
	this.data = data;
}

void
rrFromWire(DNSInput in) throws IOException {
	data = in.readByteArray();
}

void
rdataFromString(Tokenizer st, Name origin) throws IOException {
	throw st.exception("no defined text format for NULL records");
}

String
rrToString() {
	return unknownToString(data);
}

/** Returns the contents of this record. */
public byte []
getData() {
	return data;
}

void
rrToWire(DNSOutput out, Compression c, boolean canonical) {
	out.writeByteArray(data);
}

}