org.apache.hc.client5.http

Class SystemDefaultDnsResolver

java.lang.Object

org.apache.hc.client5.http.SystemDefaultDnsResolver

All Implemented Interfaces:

DnsResolver

public class SystemDefaultDnsResolver
extends Object
implements DnsResolver

DNS resolver that uses the default OS implementation for resolving host names.

Since:

4.2

Field Summary

Fields

Modifier and Type	Field and Description
static SystemDefaultDnsResolver	INSTANCE

Constructor Summary

Constructors

Constructor and Description
SystemDefaultDnsResolver()

Method Summary

Modifier and Type	Method and Description
InetAddress[]	resolve(String host) Returns the IP address for the specified host name, or null if the given host is not recognized or the associated IP address cannot be used to build an InetAddress instance.
String	resolveCanonicalHostname(String host) Gets the fully qualified domain name for given host name.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

INSTANCE

public static final SystemDefaultDnsResolver INSTANCE

Constructor Detail

SystemDefaultDnsResolver

public SystemDefaultDnsResolver()

Method Detail

resolve

public InetAddress[] resolve(String host)
                      throws UnknownHostException

Description copied from interface: DnsResolver

Returns the IP address for the specified host name, or null if the given host is not recognized or the associated IP address cannot be used to build an InetAddress instance.

Specified by:

resolve in interface DnsResolver

Parameters:

host - The host name to be resolved by this resolver.

Returns:

The IP address associated to the given host name, or null if the host name is not known by the implementation class.

Throws:

UnknownHostException

See Also:

InetAddress

resolveCanonicalHostname

public String resolveCanonicalHostname(String host)
                                throws UnknownHostException

Description copied from interface: DnsResolver

Gets the fully qualified domain name for given host name.

Specified by:

resolveCanonicalHostname in interface DnsResolver

Throws:

UnknownHostException