Class DNSQuestion

java.lang.Object

javax.jmdns.impl.DNSEntry

javax.jmdns.impl.DNSQuestion

Direct Known Subclasses:

DNSQuestion.AllRecords, DNSQuestion.DNS4Address, DNSQuestion.DNS6Address, DNSQuestion.HostInformation, DNSQuestion.Pointer, DNSQuestion.Service, DNSQuestion.Text

public class DNSQuestion
extends DNSEntry

A DNS question.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static class	DNSQuestion.AllRecords	AllRecords question.
private static class	DNSQuestion.DNS4Address	Address question.
private static class	DNSQuestion.DNS6Address	Address question.
private static class	DNSQuestion.HostInformation	Host Information question.
private static class	DNSQuestion.Pointer	Pointer question.
private static class	DNSQuestion.Service	Service question.
private static class	DNSQuestion.Text	Text question.

Field Summary

Fields

Modifier and Type	Field	Description
private static org.slf4j.Logger	logger

Fields inherited from class DNSEntry

_qualifiedNameMap

Constructor Summary

Constructors

Constructor	Description
DNSQuestion(String name, DNSRecordType type, DNSRecordClass recordClass, boolean unique)

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)
(package private) boolean	answeredBy(DNSEntry rec)	Check if this question is answered by a given DNS record.
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.
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

Field Details

logger

private static org.slf4j.Logger logger

Constructor Details

DNSQuestion

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

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

answeredBy

boolean answeredBy(DNSEntry rec)

Check if this question is answered by a given DNS record.

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 -