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Java example source code file (DefaultDnsRawRecord.java)

This example Java source code file (DefaultDnsRawRecord.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

abstractdnsrecord, bytebuf, defaultdnsrawrecord, dnsrawrecord, dnsrecordtype, opt, override, string, stringbuilder, unstableapi

The DefaultDnsRawRecord.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.buffer.ByteBuf;
import io.netty.util.internal.StringUtil;
import io.netty.util.internal.UnstableApi;

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

/**
 * The default {@code DnsRawRecord} implementation.
 */
@UnstableApi
public class DefaultDnsRawRecord extends AbstractDnsRecord implements DnsRawRecord {

    private final ByteBuf content;

    /**
     * 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
     */
    public DefaultDnsRawRecord(String name, DnsRecordType type, long timeToLive, ByteBuf content) {
        this(name, type, DnsRecord.CLASS_IN, timeToLive, content);
    }

    /**
     * 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>{@link #CLASS_CSNET}
     *                     <li>{@link #CLASS_CHAOS}
     *                     <li>{@link #CLASS_HESIOD}
     *                     <li>{@link #CLASS_NONE}
     *                     <li>{@link #CLASS_ANY}
     *                 </ul>
     * @param timeToLive the TTL value of the record
     */
    public DefaultDnsRawRecord(
            String name, DnsRecordType type, int dnsClass, long timeToLive, ByteBuf content) {
        super(name, type, dnsClass, timeToLive);
        this.content = checkNotNull(content, "content");
    }

    @Override
    public ByteBuf content() {
        return content;
    }

    @Override
    public DnsRawRecord copy() {
        return replace(content().copy());
    }

    @Override
    public DnsRawRecord duplicate() {
        return replace(content().duplicate());
    }

    @Override
    public DnsRawRecord retainedDuplicate() {
        return replace(content().retainedDuplicate());
    }

    @Override
    public DnsRawRecord replace(ByteBuf content) {
        return new DefaultDnsRawRecord(name(), type(), dnsClass(), timeToLive(), content);
    }

    @Override
    public int refCnt() {
        return content().refCnt();
    }

    @Override
    public DnsRawRecord retain() {
        content().retain();
        return this;
    }

    @Override
    public DnsRawRecord retain(int increment) {
        content().retain(increment);
        return this;
    }

    @Override
    public boolean release() {
        return content().release();
    }

    @Override
    public boolean release(int decrement) {
        return content().release(decrement);
    }

    @Override
    public DnsRawRecord touch() {
        content().touch();
        return this;
    }

    @Override
    public DnsRawRecord touch(Object hint) {
        content().touch(hint);
        return this;
    }

    @Override
    public String toString() {
        final StringBuilder buf = new StringBuilder(64).append(StringUtil.simpleClassName(this)).append('(');
        final DnsRecordType type = type();
        if (type != DnsRecordType.OPT) {
            buf.append(name().isEmpty()? "<root>" : name())
               .append(' ')
               .append(timeToLive())
               .append(' ');

            DnsMessageUtil.appendRecordClass(buf, dnsClass())
                          .append(' ')
                          .append(type.name());
        } else {
            buf.append("OPT flags:")
               .append(timeToLive())
               .append(" udp:")
               .append(dnsClass());
        }

        buf.append(' ')
           .append(content().readableBytes())
           .append("B)");

        return buf.toString();
    }
}

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