/**
* Compares this Record to another Object.
*
* @param arg The Object to be compared.
* @return The value 0 if the argument is a record equivalent to this record; a value less than 0
* if the argument is less than this record in the canonical ordering, and a value greater
* than 0 if the argument is greater than this record in the canonical ordering. The canonical
* ordering is defined to compare by name, class, type, and rdata.
* @throws ClassCastException if the argument is not a Record.
*/
public int compareTo(Record arg) {
if (this == arg) {
return (0);
}
int n = name.compareTo(arg.name);
if (n != 0) {
return (n);
}
// TODO: just compare the enum value...
n = dclass.getValue() - arg.dclass.getValue();
if (n != 0) {
return (n);
}
n = type - arg.type;
if (n != 0) {
return (n);
}
byte[] rdata1 = rdataToWireCanonical();
byte[] rdata2 = arg.rdataToWireCanonical();
for (int i = 0; i < rdata1.length && i < rdata2.length; i++) {
n = (rdata1[i] & 0xFF) - (rdata2[i] & 0xFF);
if (n != 0) {
return (n);
}
}
return (rdata1.length - rdata2.length);
}
/** Converts a Record into a String representation */
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append(name);
if (sb.length() < 8) {
sb.append("\t");
}
if (sb.length() < 16) {
sb.append("\t");
}
sb.append("\t");
if (Options.check("BINDTTL")) {
sb.append(TTL.format(ttl));
} else {
sb.append(ttl);
}
sb.append("\t");
if (dclass != DClass.IN || !Options.check("noPrintIN")) {
sb.append(dclass.getName());
sb.append("\t");
}
sb.append(Type.string(type));
String rdata = rrToString();
if (!rdata.equals("")) {
sb.append("\t");
sb.append(rdata);
}
return sb.toString();
}
public static Record fromWire(DNSInput in, int section, boolean isUpdate) throws IOException {
int type;
DClass dclass;
long ttl;
int length;
Name name;
Record rec;
name = new Name(in);
type = in.readU16();
dclass = DClass.getType(in.readU16());
if (section == Section.QUESTION) {
return newRecord(name, type, dclass);
}
ttl = in.readU32();
length = in.readU16();
if (length == 0 && isUpdate) {
return newRecord(name, type, dclass, ttl);
}
rec = newRecord(name, type, dclass, ttl, length, in);
return rec;
}
protected void toWireCanonical(DNSOutput out, boolean noTTL) {
toWireCanonical(out, name, type, dclass.getValue(), noTTL ? 0 : ttl);
}
public void toWire(DNSOutput out, int section, Compression c) {
toWire(out, section, c, name, type, dclass.getValue(), ttl);
}
