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Java example source code file (DatagramDnsQuery.java)

This example Java source code file (DatagramDnsQuery.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

addressedenvelope, datagramdnsquery, defaultdnsquery, dnsopcode, dnsrecord, inetsocketaddress, net, network, nullpointerexception, override, suppresswarnings, unstableapi

The DatagramDnsQuery.java Java example source code

/*
 * Copyright 2015 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at:
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */
package io.netty.handler.codec.dns;

import io.netty.channel.AddressedEnvelope;
import io.netty.util.internal.UnstableApi;

import java.net.InetSocketAddress;
import java.net.SocketAddress;

/**
 * A {@link DnsQuery} implementation for UDP/IP.
 */
@UnstableApi
public class DatagramDnsQuery extends DefaultDnsQuery
        implements AddressedEnvelope<DatagramDnsQuery, InetSocketAddress> {

    private final InetSocketAddress sender;
    private final InetSocketAddress recipient;

    /**
     * Creates a new instance with the {@link DnsOpCode#QUERY} {@code opCode}.
     *
     * @param sender the address of the sender
     * @param recipient the address of the recipient
     * @param id the {@code ID} of the DNS query
     */
    public DatagramDnsQuery(
            InetSocketAddress sender, InetSocketAddress recipient, int id) {
        this(sender, recipient, id, DnsOpCode.QUERY);
    }

    /**
     * Creates a new instance.
     *
     * @param sender the address of the sender
     * @param recipient the address of the recipient
     * @param id the {@code ID} of the DNS query
     * @param opCode the {@code opCode} of the DNS query
     */
    public DatagramDnsQuery(
            InetSocketAddress sender, InetSocketAddress recipient, int id, DnsOpCode opCode) {
        super(id, opCode);

        if (recipient == null && sender == null) {
            throw new NullPointerException("recipient and sender");
        }

        this.sender = sender;
        this.recipient = recipient;
    }

    @Override
    public DatagramDnsQuery content() {
        return this;
    }

    @Override
    public InetSocketAddress sender() {
        return sender;
    }

    @Override
    public InetSocketAddress recipient() {
        return recipient;
    }

    @Override
    public DatagramDnsQuery setId(int id) {
        return (DatagramDnsQuery) super.setId(id);
    }

    @Override
    public DatagramDnsQuery setOpCode(DnsOpCode opCode) {
        return (DatagramDnsQuery) super.setOpCode(opCode);
    }

    @Override
    public DatagramDnsQuery setRecursionDesired(boolean recursionDesired) {
        return (DatagramDnsQuery) super.setRecursionDesired(recursionDesired);
    }

    @Override
    public DatagramDnsQuery setZ(int z) {
        return (DatagramDnsQuery) super.setZ(z);
    }

    @Override
    public DatagramDnsQuery setRecord(DnsSection section, DnsRecord record) {
        return (DatagramDnsQuery) super.setRecord(section, record);
    }

    @Override
    public DatagramDnsQuery addRecord(DnsSection section, DnsRecord record) {
        return (DatagramDnsQuery) super.addRecord(section, record);
    }

    @Override
    public DatagramDnsQuery addRecord(DnsSection section, int index, DnsRecord record) {
        return (DatagramDnsQuery) super.addRecord(section, index, record);
    }

    @Override
    public DatagramDnsQuery clear(DnsSection section) {
        return (DatagramDnsQuery) super.clear(section);
    }

    @Override
    public DatagramDnsQuery clear() {
        return (DatagramDnsQuery) super.clear();
    }

    @Override
    public DatagramDnsQuery touch() {
        return (DatagramDnsQuery) super.touch();
    }

    @Override
    public DatagramDnsQuery touch(Object hint) {
        return (DatagramDnsQuery) super.touch(hint);
    }

    @Override
    public DatagramDnsQuery retain() {
        return (DatagramDnsQuery) super.retain();
    }

    @Override
    public DatagramDnsQuery retain(int increment) {
        return (DatagramDnsQuery) super.retain(increment);
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }

        if (!super.equals(obj)) {
            return false;
        }

        if (!(obj instanceof AddressedEnvelope)) {
            return false;
        }

        @SuppressWarnings("unchecked")
        final AddressedEnvelope<?, SocketAddress> that = (AddressedEnvelope) obj;
        if (sender() == null) {
            if (that.sender() != null) {
                return false;
            }
        } else if (!sender().equals(that.sender())) {
            return false;
        }

        if (recipient() == null) {
            if (that.recipient() != null) {
                return false;
            }
        } else if (!recipient().equals(that.recipient())) {
            return false;
        }

        return true;
    }

    @Override
    public int hashCode() {
        int hashCode = super.hashCode();
        if (sender() != null) {
            hashCode = hashCode * 31 + sender().hashCode();
        }
        if (recipient() != null) {
            hashCode = hashCode * 31 + recipient().hashCode();
        }
        return hashCode;
    }
}

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