001/*
002 * Copyright 2015-2020 the original author or authors
003 *
004 * This software is licensed under the Apache License, Version 2.0,
005 * the GNU Lesser General Public License version 2 or later ("LGPL")
006 * and the WTFPL.
007 * You may choose either license to govern your use of this software only
008 * upon the condition that you accept all of the terms of either
009 * the Apache License 2.0, the LGPL 2.1+ or the WTFPL.
010 */
011 package org.minidns.dnsserverlookup;
012
013import java.net.InetAddress;
014import java.util.ArrayList;
015import java.util.Collection;
016import java.util.List;
017import java.util.logging.Logger;
018
019public abstract class AbstractDnsServerLookupMechanism implements DnsServerLookupMechanism {
020
021    protected static final Logger LOGGER = Logger.getLogger(AbstractDnsServerLookupMechanism.class.getName());
022
023    private final String name;
024    private final int priority;
025
026    protected AbstractDnsServerLookupMechanism(String name, int priority) {
027        this.name = name;
028        this.priority = priority;
029    }
030
031    @Override
032    public final String getName() {
033        return name;
034    }
035
036    @Override
037    public final int getPriority() {
038        return priority;
039    }
040
041    @Override
042    public final int compareTo(DnsServerLookupMechanism other) {
043        int myPriority = getPriority();
044        int otherPriority = other.getPriority();
045
046        return Integer.compare(myPriority, otherPriority);
047    }
048
049    @Override
050    public abstract List<String> getDnsServerAddresses();
051
052    protected static List<String> toListOfStrings(Collection<? extends InetAddress> inetAddresses) {
053        List<String> result = new ArrayList<>(inetAddresses.size());
054        for (InetAddress inetAddress : inetAddresses) {
055            String address = inetAddress.getHostAddress();
056            result.add(address);
057        }
058        return result;
059    }
060}