DNS
Class RRGroup

java.lang.Object
  DNS.RRGroup

All Implemented Interfaces:

java.io.Serializable

public class RRGroup

extends java.lang.Object

implements java.io.Serializable

Class that holds a group of Resource Records. Note that this 'Group' is not a 'Set', as definted by DNS. In general, for standard DNS, each RRGroup will only have one element (except for SOA records): an A or NS record. But, DNSSEC will add SIG and NXT records to each group.

See Also:

Serialized Form

Field Summary

long	expires When this RRGroup expires.
java.lang.String	name The name of this RRGroup, the same as the name in its A and NS RRs
java.util.LinkedList	records Ordered list of RRs

Constructor Summary

RRGroup(java.lang.String name)
Standard constructor for an RRGroup, specifies the name, initializes data structures, sets expires to be infinite.

Method Summary

void	add(ResourceRecord rr)
void	adjustSIGRecords()
RRGroup	cache() Basically a clone operator, copies the RRGroup so it can be sent.
RRGroup	cache(int time) Basically a clone operator, copies the RRGroup so it can be sent.
boolean	equals(java.lang.Object o)
ResourceRecord	getRecord(java.lang.String type) Get a record with a certain type (should not be used for SIG records).
ResourceRecord	getRecord(java.lang.String type, java.lang.String name) Get a record with a certain type and name (?!).
java.util.ArrayList	getTypes()
int	hashCode()
boolean	hasRecord(java.lang.String type) Determines wheter or not this RRGroup has an RR with a certain type.
boolean	isExpired()
java.lang.String	toString()
void	updateDurations(long time)

Methods inherited from class java.lang.Object

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

Field Detail

name

public java.lang.String name

The name of this RRGroup, the same as the name in its A and NS RRs

records

public java.util.LinkedList records

Ordered list of RRs

expires

public long expires

When this RRGroup expires. This is used for sending RRGroup information to other nodes. It should be the same (or very very close) to the expires fields of each RR.

Constructor Detail

RRGroup

public RRGroup(java.lang.String name)

Standard constructor for an RRGroup, specifies the name, initializes data structures, sets expires to be infinite.

Method Detail

cache

public RRGroup cache()

Basically a clone operator, copies the RRGroup so it can be sent. Recursively calls cache() on each RR.

Returns:

a copy of this RRGroup

cache

public RRGroup cache(int time)

Basically a clone operator, copies the RRGroup so it can be sent. Recursively calls cache() on each RR. Each RR is reinitialized to expire timems from now.

Parameters:

time - amount of this time this RRGroup should last.

Returns:

a copy of this RRGroup

getRecord

public ResourceRecord getRecord(java.lang.String type)

Get a record with a certain type (should not be used for SIG records).

Parameters:

type - the type this record should have.

Returns:

a Resource record with the specified type.

getRecord

public ResourceRecord getRecord(java.lang.String type,
                                java.lang.String name)

Get a record with a certain type and name (?!).

Parameters:

name - the name this RR should have

type - the type this record should have.

Returns:

a Resource record with the specified type and name.

hasRecord

public boolean hasRecord(java.lang.String type)

Determines wheter or not this RRGroup has an RR with a certain type.

Parameters:

type - The type to check for.

Returns:

whether we have an RR wit this type

adjustSIGRecords

public void adjustSIGRecords()

updateDurations

public void updateDurations(long time)

add

public void add(ResourceRecord rr)

getTypes

public java.util.ArrayList getTypes()

toString

public java.lang.String toString()

isExpired

public boolean isExpired()

hashCode

public int hashCode()

equals

public boolean equals(java.lang.Object o)