e8efcd82a8
Motivation: We can just use Objects.requireNonNull(...) as a replacement for ObjectUtil.checkNotNull(....) Modifications: - Use Objects.requireNonNull(...) Result: Less code to maintain.
74 lines
2.4 KiB
Java
74 lines
2.4 KiB
Java
/*
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* Copyright 2016 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.handler.codec.dns;
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import static java.util.Objects.requireNonNull;
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import io.netty.util.internal.StringUtil;
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import io.netty.util.internal.UnstableApi;
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@UnstableApi
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public class DefaultDnsPtrRecord extends AbstractDnsRecord implements DnsPtrRecord {
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private final String hostname;
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/**
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* Creates a new PTR record.
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*
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* @param name the domain name
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* @param dnsClass the class of the record, usually one of the following:
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* <ul>
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* <li>{@link #CLASS_IN}</li>
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* <li>{@link #CLASS_CSNET}</li>
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* <li>{@link #CLASS_CHAOS}</li>
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* <li>{@link #CLASS_HESIOD}</li>
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* <li>{@link #CLASS_NONE}</li>
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* <li>{@link #CLASS_ANY}</li>
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* </ul>
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* @param timeToLive the TTL value of the record
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* @param hostname the hostname this PTR record resolves to.
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*/
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public DefaultDnsPtrRecord(
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String name, int dnsClass, long timeToLive, String hostname) {
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super(name, DnsRecordType.PTR, dnsClass, timeToLive);
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this.hostname = requireNonNull(hostname, "hostname");
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}
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@Override
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public String hostname() {
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return hostname;
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}
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@Override
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public String toString() {
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final StringBuilder buf = new StringBuilder(64).append(StringUtil.simpleClassName(this)).append('(');
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final DnsRecordType type = type();
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buf.append(name().isEmpty()? "<root>" : name())
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.append(' ')
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.append(timeToLive())
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.append(' ');
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DnsMessageUtil.appendRecordClass(buf, dnsClass())
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.append(' ')
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.append(type.name());
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buf.append(' ')
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.append(hostname);
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return buf.toString();
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}
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}
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