Class DNSQuestion

java.lang.Object

javax.jmdns.impl.DNSEntry

javax.jmdns.impl.DNSQuestion

public class DNSQuestion
extends DNSEntry

A DNS question.

Author:

Arthur van Hoff, Pierre Frisch

Method Summary

Modifier and Type	Method	Description
void	addAnswers(JmDNSImpl jmDNSImpl, Set<DNSRecord> answers)	Adds answers to the list for our question.
protected void	addAnswersForServiceInfo(JmDNSImpl jmDNSImpl, Set<DNSRecord> answers, ServiceInfoImpl info)
boolean	iAmTheOnlyOne(JmDNSImpl jmDNSImpl)	Checks if we are the only to be able to answer that question.
boolean	isExpired(long now)	Check if the record is expired.
boolean	isStale(long now)	Check if the record is stale, i.e. it has outlived more than half of its TTL.
static DNSQuestion	newQuestion(String name, DNSRecordType type, DNSRecordClass recordClass, boolean unique)	Create a question.
void	toString(StringBuilder sb)

Methods inherited from class DNSEntry

compareTo, equals, getKey, getName, getQualifiedNameMap, getRecordClass, getRecordType, getSubtype, getType, hashCode, isDomainDiscoveryQuery, isReverseLookup, isSameEntry, isSameRecordClass, isSameType, isServicesDiscoveryMetaQuery, isUnique, isV4ReverseLookup, isV6ReverseLookup, matchRecordClass, matchRecordType, sameSubtype, toByteArray, toByteArray, toString

Methods inherited from class Object

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

Method Details

newQuestion

public static DNSQuestion newQuestion(String name,
 DNSRecordType type,
 DNSRecordClass recordClass,
 boolean unique)

Create a question.

Parameters:

name - DNS name to be resolved

type - Record type to resolve

recordClass - Record class to resolve

unique - Request unicast response (Currently not supported in this implementation)

Returns:

new question

addAnswers

public void addAnswers(JmDNSImpl jmDNSImpl,
 Set<DNSRecord> answers)

Adds answers to the list for our question.

Parameters:

jmDNSImpl - DNS holding the records

answers - List of previous answer to append.

addAnswersForServiceInfo

protected void addAnswersForServiceInfo(JmDNSImpl jmDNSImpl,
 Set<DNSRecord> answers,
 ServiceInfoImpl info)

isStale

public boolean isStale(long now)

Description copied from class: DNSEntry

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

Specified by:

isStale in class DNSEntry

Parameters:

now - update date

Returns:

true is the record is stale, false otherwise.

isExpired

public boolean isExpired(long now)

Description copied from class: DNSEntry

Check if the record is expired.

Specified by:

isExpired in class DNSEntry

Parameters:

now - update date

Returns:

true is the record is expired, false otherwise.

iAmTheOnlyOne

public boolean iAmTheOnlyOne(JmDNSImpl jmDNSImpl)

Checks if we are the only to be able to answer that question.

Parameters:

jmDNSImpl - DNS holding the records

Returns:

true if we are the only one with the answer to the question, false otherwise.

toString

public void toString(StringBuilder sb)

Overrides:

toString in class DNSEntry

Parameters:

sb -