Package org.ldaptive.dns

Class AbstractDNSResolver<T>

java.lang.Object

org.ldaptive.dns.AbstractDNSResolver<T>

Type Parameters:

T - Type of record to resolve.

All Implemented Interfaces:

DNSResolver<T>

Direct Known Subclasses:

SRVDNSResolver

public abstract class AbstractDNSResolver<T>
extends Object
implements DNSResolver<T>

Base class for all DNS resolvers.

Field Summary

Fields

Modifier and Type	Field	Description
private DNSContextFactory	contextFactory	Factory to create DNS connections.
protected Logger	logger	Class logger.

Constructor Summary

Constructors

Constructor	Description
AbstractDNSResolver(DNSContextFactory factory)	Creates a new abstract DNS resolver.

Method Summary

Modifier and Type	Method	Description
protected abstract String[]	getAttributes()	Get the types of records to query for, e.g.
protected abstract Set<T>	processRecords(Set<String> records)	Process a set of DNS records.
Set<T>	resolve(String name)	Resolve a set of DNS records of some type for the given name.
private void	resolveOne(DirContext ctx, String name, String attrId, Set<String> records)	Query for a single kind of DNS record.
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

logger

protected final Logger logger

Class logger.

contextFactory

private final DNSContextFactory contextFactory

Factory to create DNS connections.

Constructor Detail

AbstractDNSResolver

public AbstractDNSResolver(DNSContextFactory factory)

Creates a new abstract DNS resolver.

Parameters:

factory - DNS context factory

Method Detail

resolve

public Set<T> resolve(String name)

Description copied from interface: DNSResolver

Resolve a set of DNS records of some type for the given name.

Specified by:

resolve in interface DNSResolver<T>

Parameters:

name - Name for which to resolve DNS records.

Returns:

Set of records of type T bound to the given name.

getAttributes

protected abstract String[] getAttributes()

Get the types of records to query for, e.g. {"A", "AAAA"}.

Returns:

Array of JNDI attribute names.

processRecords

protected abstract Set<T> processRecords(Set<String> records)

Process a set of DNS records.

Parameters:

records - Set of raw DNS records returned from a name query.

Returns:

Set of converted/processed records.

resolveOne

private void resolveOne(DirContext ctx,
                        String name,
                        String attrId,
                        Set<String> records)
                 throws NamingException

Query for a single kind of DNS record.

Parameters:

ctx - Directory context.

name - Name to query for.

attrId - DNS record type, e.g. A.

records - Set of records to append results to.

Throws:

NamingException - on DNS lookup failure.

toString

public String toString()

Overrides:

toString in class Object