Java tutorial
/* * 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> * <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> * </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(); } }