AbstractDnsRecord.java — netty Source File

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:
 *
 *   https://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.util.internal.PlatformDependent;
import io.netty.util.internal.StringUtil;

import java.net.IDN;

import static io.netty.util.internal.ObjectUtil.checkNotNull;
import static io.netty.util.internal.ObjectUtil.checkPositiveOrZero;

/**
 * A skeletal implementation of {@link DnsRecord}.
 */
public abstract class AbstractDnsRecord implements DnsRecord {

    private final String name;
    private final DnsRecordType type;
    private final short dnsClass;
    private final long timeToLive;
    private int hashCode;

    /**
     * Creates a new {@link #CLASS_IN IN-class} record.
     *
     * @param name the domain name
     * @param type the type of the record
     * @param timeToLive the TTL value of the record
     */
    protected AbstractDnsRecord(String name, DnsRecordType type, long timeToLive) {
        this(name, type, CLASS_IN, timeToLive);
    }

    /**
     * Creates a new record.
     *
     * @param name the domain name
     * @param type the type of the record
     * @param dnsClass the class of the record, usually one of the following:
     *                 <ul>
     *                     <li>{@link #CLASS_IN}</li>
     *                     <li>{@link #CLASS_CSNET}</li>
     *                     <li>{@link #CLASS_CHAOS}</li>
     *                     <li>{@link #CLASS_HESIOD}</li>
     *                     <li>{@link #CLASS_NONE}</li>
     *                     <li>{@link #CLASS_ANY}</li>
// ... (104 more lines)