javax.jmdns.impl
Class DNSEntry

java.lang.Object
  javax.jmdns.impl.DNSEntry

Direct Known Subclasses:

DNSQuestion, DNSRecord

public abstract class DNSEntry
extends Object

DNS entry with a name, type, and class. This is the base class for questions and records.

Author:

Arthur van Hoff, Pierre Frisch, Rick Blair

Method Summary

int	compareTo(DNSEntry that) Does a lexicographic comparison of the byte array representation of this record and that record.
boolean	equals(Object obj)
String	getKey() Returns the key for this entry.
String	getName() Returns the name of this entry
Map<ServiceInfo.Fields,String>	getQualifiedNameMap()
DNSRecordClass	getRecordClass()
DNSRecordType	getRecordType()
String	getSubtype() Returns the subtype of this entry
String	getType()
int	hashCode() Overriden, to return a value which is consistent with the value returned by equals(Object).
boolean	isDomainDiscoveryQuery()
abstract boolean	isExpired(long now) Check if the record is expired.
boolean	isReverseLookup()
boolean	isSameEntry(DNSEntry entry) Check if two entries have exactly the same name, type, and class.
boolean	isSameRecordClass(DNSEntry entry) Check that 2 entries are of the same class.
boolean	isSameType(DNSEntry entry) Check that 2 entries are of the same type.
boolean	isServicesDiscoveryMetaQuery()
abstract boolean	isStale(long now) Check if the record is stale, i.e.
boolean	isUnique()
boolean	isV4ReverseLookup()
boolean	isV6ReverseLookup()
boolean	sameSubtype(DNSEntry other) Check if two entries have the same subtype.
protected byte[]	toByteArray() Creates a byte array representation of this record.
protected void	toByteArray(DataOutputStream dout)
String	toString()
protected void	toString(StringBuilder aLog)

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Method Detail

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

isSameEntry

public boolean isSameEntry(DNSEntry entry)

Check if two entries have exactly the same name, type, and class.

Parameters:

entry -

Returns:

true if the two entries have are for the same record, false otherwise

sameSubtype

public boolean sameSubtype(DNSEntry other)

Check if two entries have the same subtype.

Parameters:

other -

Returns:

true if the two entries have are for the same subtype, false otherwise

getSubtype

public String getSubtype()

Returns the subtype of this entry

Returns:

subtype of this entry

getName

public String getName()

Returns the name of this entry

Returns:

name of this entry

getType

public String getType()

Returns:

the type

getKey

public String getKey()

Returns the key for this entry. The key is the lower case name.

Returns:

key for this entry

getRecordType

public DNSRecordType getRecordType()

Returns:

record type

getRecordClass

public DNSRecordClass getRecordClass()

Returns:

record class

isUnique

public boolean isUnique()

Returns:

true if unique

getQualifiedNameMap

public Map<ServiceInfo.Fields,String> getQualifiedNameMap()

isServicesDiscoveryMetaQuery

public boolean isServicesDiscoveryMetaQuery()

isDomainDiscoveryQuery

public boolean isDomainDiscoveryQuery()

isReverseLookup

public boolean isReverseLookup()

isV4ReverseLookup

public boolean isV4ReverseLookup()

isV6ReverseLookup

public boolean isV6ReverseLookup()

isStale

public abstract boolean isStale(long now)

Check if the record is stale, i.e. it has outlived more than half of its TTL.

Parameters:

now - update date

Returns:

true is the record is stale, false otherwise.

isExpired

public abstract boolean isExpired(long now)

Check if the record is expired.

Parameters:

now - update date

Returns:

true is the record is expired, false otherwise.

isSameRecordClass

public boolean isSameRecordClass(DNSEntry entry)

Check that 2 entries are of the same class.

Parameters:

entry -

Returns:

true is the two class are the same, false otherwise.

isSameType

public boolean isSameType(DNSEntry entry)

Check that 2 entries are of the same type.

Parameters:

entry -

Returns:

true is the two type are the same, false otherwise.

toByteArray

protected void toByteArray(DataOutputStream dout)
                    throws IOException

Parameters:

dout -

Throws:

IOException

toByteArray

protected byte[] toByteArray()

Creates a byte array representation of this record. This is needed for tie-break tests according to draft-cheshire-dnsext-multicastdns-04.txt chapter 9.2.

Returns:

byte array representation

compareTo

public int compareTo(DNSEntry that)

Does a lexicographic comparison of the byte array representation of this record and that record. This is needed for tie-break tests according to draft-cheshire-dnsext-multicastdns-04.txt chapter 9.2.

Parameters:

that -

Returns:

a negative integer, zero, or a positive integer as this object is less than, equal to, or greater than the specified object.

hashCode

public int hashCode()

Overriden, to return a value which is consistent with the value returned by equals(Object).

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object

toString

protected void toString(StringBuilder aLog)

Parameters:

aLog -